Department of Applied Physics

PUBLICATIONS: Soft Matter and Wetting group

Full list of publications.

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Publications by year:

2024 (5)

  1. Lepikko S., Morais Jaques Y., Junaid M., Backholm M., Lahtinen J., Julin J., Jokinen V.,  Sajavaara T., Sammalkorpi M., Foster A. S., Ras R. H. A.,
    Droplet slipperiness despite surface heterogeneity at molecular scale, 
    Nature Chemistry 16, 506-513 (2024). (link)
  2. Mai C. T. K., Halme J., Nurmi H. A., da Silva A. M., Lorite G. S., Martineau D., Narbey S., Mozaffari N., Ras R. H. A., Hashmi S. G., Vuckovac M.,
    Super-Droplet-Repellent Carbon-Based Printable Perovskite Solar Cells, 
    Advanced Science (2024). (link)
  3. Backholm M., Kärki T., Nurmi H.A., Vuckovac M., Turkki V., Lepikko S., Jokinen V., Quéré D., Timonen J.V.I., Ras R. H. A.,
    Towards vanishing droplet friction on repellent surfaces,
    Proceedings of the National Academy of Sciences of the USA (PNAS) e2315214121 (2024). (link)
  4. Kostiainen M.A., Priimagi A., Timonen J.V.I., Ras R. H. A., Sammalkorpi M., Penttilä M., Ikkala O., Linder M.B.,
    Materials Inspired by Living Functions, 
    Advanced Functional Materials (2024). (link)
  5. Vieira A., Jokinen V., Lepikko S., Ras R.H.A., Zhou Q.
    Through-Drop Imaging of Liquid–Solid Interfaces: From Contact Angle Variations Along the Droplet Perimeter to Mapping of Contact Angles Across a Surface,
    Langmuir (2024). (link)

2023 (11)

  1. Tesler A. B., Kolle S., Prado L. H., Thievessen I., Böhringer D., Backholm M., Karunakaran B., Nurmi H. A., Latikka M., Fischer L., Stafslien S., Cenev Z. M., Timonen J. V. I., Bruns M., Mazare A., Lohbauer U., Virtanen S., Fabry B., Schmuki P., Ras R. H. A., Aizenberg J., Goldmann W. H.,
    Long-term stability of aerophilic metallic surfaces underwater,
    Nature Materials 22, 1548–1555 (2023). (link)
  2. Chen L., Huang S., Ras R. H. A.,Tian X.,
    Omniphobic liquid-like surfaces,
    Nature Reviews Chemistry 7, 123–137 (2023). (link)
  3. Wong W. S. Y., Kiseleva M. S., Zhou S., Junaid M., Pitkänen L., Ras R. H. A.,
    Design of Fluoro-Free Surfaces Super-Repellent to Low Surface Tension Liquids,
    Advanced Materials 35, 2300306 (2023). (link)
  4. Daniel D., Vuckovac M., Backholm M., Latikka M., Karyappa R., Koh X. Q., Timonen J. V. I., Tomczak N., Ras R. H. A.,
    Probing surface wetting across multiple force, length and time scales,
    Communications Physics 6, 152 (2023). (link)
  5. Riccobelli D., Al-Terke H. H. , Laaksonen P., Metrangolo P., Paananen A., Ras R. H. A. , Ciarletta P., Vella D.,
    Flattened and Wrinkled Encapsulated Droplets: Shape Morphing Induced by Gravity and Evaporation,
    Physical Review Letters 130, 218202 (2023). (link)
  6. Al-Terke H. H., Beaune G., Junaid M., Seitsonen J., Paananen A., Timonen J. V. I., Joensuu J., Brochard-Wyart F., Ras R. H. A.,
    Compressibility and porosity modulate the mechanical properties of giant gas vesicles,
    Proceedings of the National Academy of Sciences of the United States of America (PNAS), e2211509120 (2023). (link)
  7. Jonkergouw C., Beyeh N. K., Osmekhina E., Leskinen K., Taimoory S. M., Federov D., Anaya-Plaza E., Kostiainen M. A., Trant J. F., Ras R. H. A., Saavalainen P., Linder M. B.,
    Repurposing host-guest chemistry to sequester virulence and eradicate biofilms in multidrug resistant Pseudomonas aeruginosa and Acinetobacter baumannii,
    Nature Communications, 2141 (2023). (link)
  8. Vieira A., Cui W., Jokinen V., Ras R. H. A., Zhou Q.,
    Through-drop imaging of moving contact lines and contact areas on opaque water-repellent surfaces,
    Soft Matter, 2350–2359 (2023). (link)
  9. Zhou S., Gustavsson L., Beaune G., Chandra S., Niskanen J., Ruokolainen J., Timonen J. V. I., Ikkala O., Peng B., Ras R. H. A., 
    pH-Responsive Near-Infrared Emitting Gold Nanoclusters,
    Angewandte Chemie International Edition, e202312679 (2023). (link)
  10. Chandra S., Sciortino A., Das S., Ahmed F., Jana A., Roy J., Li D., Liljeström V., Jiang H., Johansson L.-S., Chen X., Nonappa, Cannas M., Pradeep T., Peng B., Ras R. H. A., Sun Z., Ikkala O., Messina F.,
    Gold Au(I)6 Clusters with Ligand-Derived Atomic Steric Locking: Multifunctional Optoelectrical Properties and Quantum Coherence,
    Advanced Optical Materials 2202649 (2023) (link)
  11. Jana A., Dar W. A., Jana S. K., Poonia A. K., Yadav V., Roy J., Chandra S., Adarsh K. N. V. D., Ras R. H. A., Pradeep T.,
    Photoconversion of Ag31 to Ag42 Initiated by Solvated Electrons,
    Chemistry of Materials (2023) (link)

2022 (7)

  1. Chandra S., Sciortino A., Shandilya S., Fang L., Chen X., Nonappa, Jiang H., Johansson L.-S., Cannas M., Ruokolainen J., Ras R. H. A., Messina F., Peng B., Ikkala O.,
    Core-selective silver-doping of gold nanoclusters by surface-bound sulphates on colloidal templates: From synthetic mechanism to relaxation dynamics,
    Advanced Optical Materials, 2201901 (2022). (link)
  2. Zhou S., Peng B., Duan Y., Liu K. ,Ikkala O., Ras R. H. A.,
    Bright and Photostable Fluorescent Metal Nanocluster Supraparticles from Invert Emulsions,
    Angewandte Chemie International Edition, e202210808 (2022). (link)
  3. Afzalifar A., Shields G.C., Fowler V.R., Ras R.H.A.,
    Probing the Free Energy of Small Water Clusters: Revisiting Classical Nucleation Theory,
    Journal of Physical Chemistry Letters, 13, 8038−8046 (2022). (link)
  4. Junaid M., Nurmi H. A., Latikka M., Vuckovac M., Ras R. H. A.,
    Oscillating droplet tribometer for sensitive and reliable wetting characterization of superhydrophobic surfaces,
    Droplet, 1, 43–52 (2022). (link)
  5. Pigliacelli C., Acocella A., Díez I., Moretti L., Dichiarante V., Demitri N., Jiang H., Maiuri M., Ras R. H. A., Bombelli F. B., Cerullo G., Zerbetto F., Metrangolo P., Terraneo G.,
    High-resolution crystal structure of a 20 kDa superfluorinated gold nanocluster,
    Nature Communications, 13, 2607 (2022). (link)
  6. Nurmi H. A., Yu C., Toptunov D., Ras R. H. A., Jokinen V.,
    Superhydrophobic Lubrication: Gas–Liquid Bilayer Reduces the Friction Between Two Solids,
    Advanced Materials Interfaces, 2102132 (2022). (link)
  7. Zhou S., Duan Y., Liu K., Ras R.H.A.,
    Bright and Stable Gold Nanocluster Assemblies by Silica/Zirconia Double-Shell Encapsulation,
    Journal of Materials Chemistry C, 10001–10008 (2022). (link)

2021 (8)

  1. Al-Terke H. H., Latikka M., Timonen J. V. I., Vékás L., Paananen A., Joensuu J., Ras R. H. A.,
    Functional Magnetic Microdroplets for Antibody Extraction,
    Advanced Materials Interfaces, 2101317 (2021). (link)
  2. Bitarafan M.H., Zhou S., Hänninen J., Duan Y., Leio M., Ras R.H.A., Toivonen J.,
    Light-patterned Fluorescent Gold Nanoclusters in Polycarbonate Films,
    Optical Materials Express 11, 4015–4025 (2021). (link)
  3. Hokkanen M.J., Backholm M., Vuckovac M., Zhou Q., Ras R.H.A.,
    Force-based Wetting Characterization of Stochastic Superhydrophobic Coatings at Nanonewton Sensitivity,
    Advanced Materials 33, 2105130 (2021). (link)
  4. Dong Z., Vuckovac M., Cui W., Zhou Q., Ras R.H.A., Levkin P.A.
    3D printing of superhydrophobic objects with bulk nanostructure,
    Advanced Materials 33, 2106068 (2021). (link)
  5. Cenev Z., Harischandra P.A.D., Nurmi S., Latikka M., Hynninen V., Ras R.H.A., Timonen J.V.I., Zhou Q.,
    Ferrofluidic Manipulator: Automatic Manipulation of Nonmagnetic Microparticles at the Air–Ferrofluid Interface,
    IEEE/ASME Transactions on Mechatronics 26 1932–1940 (2021). (link)
  6. Xu W., Mihhels K., Kotov N., Lepikko S., Ras R.H.A., Johnson C.M., Pettersson T., Kontturi E.,
    Solid-state polymer adsorption for surface modification: the role of molecular weight,
    Journal of Colloid and Interface Science 605,441–450 (2021). (link) [pdf]
  7. Chakraborty A., Nonappa, Mondal B., Chaudhari K., Rekola H., Hynninen V., Kostiainen M. A., Ras R. H. A., Pradeep T.,
    Near-Infrared Chiral Plasmonic Microwires through Precision Assembly of Gold Nanorods on Soft Biotemplates,
    The Journal of Physical Chemistry C 125, 3256–3267 (2021). (link)
  8. Hynninen V., Chandra S., Das S., Amini M., Dai Y., Lepikko S., Mohammadi P., Hietala S., Ras R. H. A., Sun Z., Ikkala O., Nonappa,
    Luminescent Gold Nanocluster‐Methylcellulose Composite Optical Fibers with Low Attenuation Coefficient and High Photostability,
    Small 2005205 (2021). (link)

2020 (9)

  1. Wang D., Sun Q., Hokkanen M.J., Zhang C., Lin F.-Y., Liu Q., Zhu S.-P., Zhou T., Chang Q., He B., Zhou Q., Chen L., Wang Z., Ras R.H.A., Deng X.,
    Design of Robust Superhydrophobic Surfaces,
    Nature 582, 55–59 (2020). (link) (pdf view only) (press release)
  2. Vuckovac M., Backholm M., Timonen J.V.I., Ras R.H.A.,
    Viscosity-Enhanced Droplet Motion in Sealed Superhydrophobic Capillaries,
    Science Advances 6, eaba5197 (2020).(link) [pdf]
  3. Backholm M., Molpeceres D., Vuckovac M., Nurmi H., Hokkanen M.J., Jokinen V., Timonen J.V.I., Ras R.H.A.,
    Water droplet friction and rolling dynamics on superhydrophobic surfaces,
    Communications Materials 1,64 (2020).(link) [pdf]
  4. Latikka M., Backholm M., Baidya A., Ballesio A., Serve A., Beaune G., Timonen J.V.I., Pradeep T., Ras R.H.A.,
    Ferrofluid microdroplet splitting for population-based microfluidics and interfacial tensiometry,
    Advanced Science 2000359 (2020). (link) [pdf]
  5. Al-Azawi A., Hörenz C., Tupasela T., Ikkala O., Jokinen V., Franssila S., Ras R.H.A.,
    Slippery and Magnetically Responsive Micropillared Surfaces for Manipulation of Droplets and Beads,
    AIP Advances 10, 085021 (2020). (link) [pdf]
  6. Vapaavuori J., Koskela J.E., Wang X., Ras R.H.A., Priimagi A., Bazuin C.G., Pellerina C.,
    Effect of hydrogen-bond strength on photoresponsive properties of polymer azobenzene complexes,
    Canadian Journal of Chemistry 98,531–538 (2020). (link)
  7. Jana A., Chakraborty P., Dar W., Chandra S., Khatun E., Kannan M.P., Ras R.H.A., Pradeep T.,
    Dual Emitting Ag35 Nanocluster Protected by 2-Pyrene Imine Thiol,
    Chemical Communications, 56, 12550–12553 (2020). (link) [pdf]
  8. Yu C., Sasic S., Liu K., Salameh S., Ras R.H.A., van Ommen R.,
    Nature-Inspired Self-Cleaning Surfaces: Mechanisms, Modelling, and Manufacturing,
    Chemical Engineering Research and Design 155, 48-65 (2020). (link) [pdf]
  9. Al-Azawi A., Cenev Z., Tupasela T., Peng B., Ikkala O., Zhou Q., Jokinen V., Franssila S., Ras R.H.A.,
    Tunable and Magnetic Thiol-ene Micropillar Arrays,
    Macromolecular Rapid Communications 41, 1900522 (2020). (link) [pdf]

2019 (8)

  1. Liu K., Vuckovac M., Latikka M., Huhtamäki T., Ras R.H.A.,
    Improving surface-wetting characterization,
    Science 363, 1147−1148 (2019). (link) [pdf] (press release)
  2. Zhang C., Chang Y., Xiao X., Liu G., Xu Z., Wang B., Yu C., Ras R.H.A., Jiang L.,
    Efficient separation of immiscible oil/water mixtures using a perforated lotus leaf,
    Green Chemistry 21, 6579–6584 (2019). (link) [pdf]
  3. Vuckovac M., Latikka M., Liu K., Huhtamäki T., Ras R.H.A.,
    Uncertainties in Contact Angle Goniometry,
    Soft Matter 15, 7089–7096 (2019). (link) [pdf]
  4. Baidya A., Yatheendran A., Ahuja T., Sudhakar C., Kumar Das S., Ras R.H.A., Pradeep T.,
    Waterborne Fluorine-Free Superhydrophobic Surfaces Exhibiting Simultaneous CO2 and Humidity Sorption,
    Advanced Materials Interfaces 6, 1901013 (2019). (link) [pdf]
  5. Chandra S., Nonappa, Beaune G., Som A., Zhou S., Lahtinen J., Jiang H., Timonen J.V.I., Ikkala O., Ras R.H.A.,
    Highly luminescent gold nanocluster frameworks,
    Advanced Optical Materials 7, 1900620 (2019). (link) [pdf]
  6. Chang B., Liu H., Ras R.H.A., Zhou Q.,
    Capillary Transport of Miniature Soft Ribbons,
    Micromachines 10, 684 (2019). (link) [pdf]
  7. Zhang H., Muhammad J., Liu K., Ras R.H.A., Ikkala O.,
    Light-induced reversible hydrophobization of cationic gold nanoparticles via electrostatic adsorption of photoacid,
    Nanoscale 11, 14118−14122 (2019). (link) [pdf]
  8. Xu W., Näkki S., Wang J.T.W., Wu J., Li F., Rantanen J., Nissinen T., Kettunen M., Backholm M., Ras R.H.A., Al-Jamal K., Lehto V.-P.,
    Designed inorganic porous nanovector with controlled release and MRI features for safe administration of doxorubicin,
    International Journal of Pharmaceutics 554, 327−336 (2019). (link) [pdf]

2018 (15)

  1. Huhtamäki T., Tian X., Korhonen J.T., Ras R.H.A.,
    Surface-Wetting Characterization using Contact-Angle Measurements,
    Nature Protocols 13, 1521–1538 (2018). (link) [pdf] (press release)
  2. Dong Z., Schumann M.F., Hokkanen M.J., Chang B., Welle A., Zhou Q., Ras R.H.A., Xu Z., Wegener M., Levkin P.A.,
    Superoleophobic Slippery Lubricant-Infused Surface: Combining two Extremes in the same Surface,
    Advanced Materials 30, 1803890 (2018). (link) [pdf]
  3. Chang B., Kivinen O., Pini I., Levkin P.A., Ras R.H.A., Zhou Q.,
    Nanoliter Deposition on Star-shaped Hydrophilic-Superhydrophobic Patterned Surfaces,
    Soft Matter 14, 7500–7506 (2018). (link) [pdf]
  4. Beyeh N.K., Nonappa, Liljeström V., Mikkila J., Korpi A., Bochicchio D., Pavan G.M., Ikkala O., Ras R.H.A., Kostiainen M.A.,
    Crystalline Cyclophane−Protein Cage Framework,
    ACS Nano 12, 8029−8036 (2018). (link) [pdf]
  5. Dichiarante V., Martinez Espinoza M.I., Gazzera L., Vuckovac M., Latikka M., Cavallo G., Raffaini G., Oropesa-Nuñez R., Canale C., Dante S., Marras S., Carzino R., Prato M., Ras R.H.A., Metrangolo P.,
    A Short-Chain Multibranched Perfluoroalkyl Thiol for More Sustainable Hydrophobic Coatings,
    ACS Sustainable Chemistry & Engineering 6, 9734−9743 (2018). (link) [pdf]
  6. Vasilescu C., Latikka M., Knudsen K.D., Garamus V.M., Socoliuc V., Turcu R., Tombácz E., Susan-Resiga D., Ras R.H.A., Vékás L.,
    High concentration aqueous magnetic fluids: structure, colloidal stability, magnetic and flow properties,
    Soft Matter 14, 6648–6666 (2018). (link) [pdf]
  7. Välimäki S., Beyeh N.K., Linko V., Ras R.H.A., Kostiainen M.A.,
    A supramolecular host-guest complex for heparin binding and sensing,
    Nanoscale 10, 14022–14030 (2018). (link) [pdf]
  8. Latikka M., Backholm M., Timonen J.V.I., Ras R.H.A.,
    Wetting of ferrofluids: phenomena and control,
    Current Opinion in Colloid & Interface Science 36, 118–129 (2018). (link) [pdf]
  9. Baidya A., Das S.K., Ras R.H.A., Pradeep T.,
    Fabrication of a Waterborne Durable Superhydrophobic Material Functioning in Air and under Oil,
    Advanced Materials Interfaces 5, 1701523 (2018). (link) [pdf]
  10. Barmaki S., Jokinen J., Obermaier D., Blokhina D., Korhonen M., Ras R.H.A., Vuola J., Franssila  S., Kankuri E.,
    A microfluidic oxygen sink to create a targeted cellular hypoxic microenvironment under ambient atmospheric conditions,
    Acta Biomaterialia 73, 167–179 (2018). (link) [pdf]
  11. Jokinen V., Kankuri E., Hoshian S., Franssila S., Ras R.H.A.,
    Superhydrophobic blood-repellent surfaces,
    Advanced Materials 30, 1705104 (2018). (link) [pdf]
  12. Khanjani P., King A.W.T., Partl G.J., Johansson L.-S., Kostiainen M.A., Ras R.H.A.,
    Superhydrophobic paper from nanostructured fluorinated cellulose esters,
    ACS Applied Materials & Interfaces 10, 11280–11288(2018).  (link) [pdf]
  13. Huang S., Ras R.H.A., Tian X.,
    Antifouling membranes for oily wastewater treatment: interplay between wetting and fouling,
    Current Opinion in Colloid & Interface Science 11, 90–109 (2018). (link) [pdf]
  14. Beyeh N.K., Díez I., Taimoory S.M., Meister D., Feig A.I., Trant J.F., Ras. R.H.A, Rissanen K.,
    High-affinity and selective detection of pyrophosphate in water by a resorcinarene salt receptor​,
    Chemical Science 9, 1358–1367 (2018). (link) [pdf]
  15. Puttreddy R., Beyeh N.K., Jurček P., Turunen L., Trant J.F., Ras. R.H.A., Rissanen K.,
    Host-guest complexes of C-propyl-2-bromoresorcinarene with aromatic N-oxides,
    Supramolecular Chemistry 30, 445–454 (2018). (link) [pdf

2017 (15)

  1. Liimatainen V., Vuckovac M., Jokinen V., Sariola V., Hokkanen M., Zhou Q., Ras R.H.A.,
    Mapping microscale wetting variations on biological and synthetic water-repellent surfaces,
    Nature Communications 8, 1798 (2017). (link) [pdf]
  2. Liljeström V., Ora A., Hassinen J., Rekola H., Nonappa, Heilala, M., Hynninen V., Joensuu J., Ras R.H.A., Törmä P., Ikkala O., Kostiainen M.A.,
    Cooperative colloidal self-assembly of metal-protein superlattice wires,
    Nature Communications 8, 671(2017). (link) [pdf]
  3. Backholm M., Timonen J.V.I., Ras R.H.A.,
    Slippery and never wet,
    Europhysics News 48, 30–33 (2017). (link) [pdf]
  4. Baidya A., Ganayee M.A., Ravindrana S.J., Tam K.C., Das S.K., Ras R.H.A., Pradeep T.,
    Organic Solvent-Free Fabrication of Durable and Multifunctional Superhydrophobic Paper from Waterborne Fluorinated Cellulose Nanofiber Building Blocks,
    ACS Nano (2017) 11, 11091–11099(2017). (link) [pdf]
  5. Turunen L., Pan F., Beyeh N.K., Trant J.F., Ras. R.H.A., Rissanen K.,
    Bamboo-like Chained Cavities and Other Halogen-Bonded Complexes from Tetrahaloethynyl Cavitands with Simple Ditopic Halogen Bond Acceptors,
    Crystal Growth and Design 18, 513–520 (2017). (link) [pdf]
  6. Hoshian S., Kankuri E., Ras R.H.A., Franssila S., Jokinen V.,
    Water and Blood Repellent Flexible Tubes,
    Scientific Reports 7, 16019 (2017). (link) [pdf]
  7. Al-Azawi A., Latikka M., Jokinen V., Franssila S., Ras R.H.A.,
    Friction and Wetting Transitions of Magnetic Droplets on Micropillared Superhydrophobic Surfaces,
    Small 13, 1700860 (2017). (link) [pdf]
  8. Turunen L., Pan F., Beyeh N.K., Cetina M., Trant J.F., Ras R.H.A., Rissanen K.,
    Halogen-Bonded Solvates of Tetrahaloethynyl Cavitands,
    CrystEngComm 19, 5223–5229 (2017). (link) [pdf]
  9. Puttreddy R., Beyeh N.K., Ras R.H.A., Trant J.F., Rissanen K.,
    Endo-/Exo- and Halogen Bonded Complexes of Conformationally Rigid C-ethyl-2-bromoresorcinarene and aromatic N-oxides,
    CrystEngComm 19, 4312–4320 (2017). (link) [pdf]
  10. Beyeh N.K., Jo H.H., Kolesnichenko I., Pan F., Kalenius E., Anslyn E, Ras R.H.A., Rissanen K.,
    Recognition of Viologen Derivatives in Water by N-Alkyl Ammonium Resorcinarene Chlorides,
    Journal of Organic Chemistry 82, 5198–5203 (2017). (link) [pdf]
  11. Backholm M., Vuckovac M., Schreier J., Latikka M., Hummel M., Linder M.B., Ras R.H.A.,
    Oscillating ferrofluid droplet microrheology of liquid-immersed sessile droplets,
    Langmuir 33, 6300–6306 (2017). (link) [pdf]
  12. Ras R.H.A., Tian X., Bayer I.S.,
    Superhydrophobic and Superoleophobic Nanostructured Cellulose and Cellulose Composites,
    in "Handbook of Nanocellulose and Cellulose Nanocomposites", H. Kargarzadeh, I. Ahmad, S. Thomas and A. Dufresne (eds.), Wiley-VCH Verlag, Weinheim, Germany (2017). (link) [pdf]
  13. Puttreddy R., Beyeh N.K., Ras R.H.A., Rissanen K.,
    Host–Guest Complexes of C-Ethyl-2-methylresorcinarene and Aromatic N,N’-Dioxides,
    ChemistryOpen 6, 417–423 (2017). (link) [pdf]
  14. Guo J., Filpponen I., Johansson L.-S., Mohammadi P., Latikka M., Linder M.B., Ras R.H.A., Rojas O.J.,
    Complexes of Magnetic Nanoparticles with Cellulose Nanocrystals as Regenerable, Highly Efficient, and Selective Platform for Protein Separation,
    Biomacromolecules 18, 898–905 (2017). (link) [pdf]
  15. Ahvenniemi E., et al.,
    Review Article: Recommended reading list of early publications on atomic layer deposition—Outcome of the “Virtual Project on the History of ALD”,
    Journal of Vacuum Science & Technology A 35, 010801 (2017). (link) [pdf]​

2016 (17)

  1. Tian X., Verho T., Ras R.H.A.,
    Moving superhydrophobic surfaces toward real-world applications,
    Science 352, 142-143(2016). (link) [pdf]
  2. Li J., Qin Q.H., Shah A., Ras R.H.A., Tian X., Jokinen V.,
    Oil Droplet Self-Transportation on Oleophobic Surfaces,
    Science Advances 2, e1600148 (2016). (link) [pdf]
  3. Tian X., Jokinen V., Li J., Sainio J., Ras R.H.A.,
    Unusual Dual Superlyophobic Surfaces in Oil-Water Systems: the Design Principles,
    Advanced Materials 28, 10652–10658 (2016). (link) [pdf]
  4. Majoinen J., Hassinen J., Haataja J. S., Rekola H. T., Kontturi E., Kostiainen M. A., Ras R.H.A., Törmä P., Ikkala O.,
    Chiral plasmonics using twisting along cellulose nanocrystals as a template for gold nanoparticles,
    Advanced Materials 28, 5262–5267 (2016). (link) [pdf]
  5. R.H.A. Ras, X. Tian, B. Chang, J.V.I. Timonen,
    Droplet Manipulation on Liquid-Repellent Surfaces,
    in “Non-wettable Surfaces: Theory, Preparation and Applications”, Ras R.H.A., Marmur A. (eds.) Royal Society of Chemistry, Cambridge (2016) 368-384. (link)
  6. Pan F., Beyeh N.K., Ras R.H.A., Rissanen K.,
    Guest-Induced Folding of the N-Benzyl substituents in an Ammonium Resorcinarene Chloride and the Formation of a Halogen-Bonded Dimer of Capsules,
    Crystal Growth & Design 16, 6729-6733 (2016). (link) [pdf]
  7. Wang M., Anoshkin I.V., Nasibulin A.G., Ras R.H.A., Nonappa, Laine J., Kauppinen E.I., Ikkala O.,
    Electrical behaviour of native cellulose nanofibril/carbon nanotube hybrid aerogels under cyclic compression,
    RSC Advances 6, 89051-89056 (2016). (link) [pdf]
  8. Karimi N., Kunwar P, Hassinen J., Ras R.H.A., Toivonen J.,
    Micropatterning of silver nanoclusters embedded in polyvinyl alcohol films,
    Optics Letters 41, 3627-3630 (2016). (link) [pdf]
  9. Pan F., Beyeh N.K., Ras R.H.A., Rissanen K.,
    N-Alkyl Ammonium Resorcinarene Polyiodides,
    CrystEngComm 18, 5724-5727 (2016). (link) [pdf]
  10. Chang B., Zhou Q., Ras R.H.A., Shah A., Wu Z., Hjort K.,
    Sliding droplets on hydrophilic/superhydrophobic patterned surfaces for liquid deposition,
    Applied Physics Letters 108, 154102 (2016). (link) [pdf]
  11. Lintinen K., Latikka M., Sipponen M. H., Ras R.H.A., Österberg M., Kostiainen M.,
    Structural Diversity in Metal-Organic Nanoparticles Based on Iron Isopropoxide Treated Lignin,
    RSC Advances 6, 31790-31796(2016). (link) [pdf]
  12. Kunwar P., Hassinen J., Bautista G., Ras R.H.A., Toivonen J.,
    Sub-micron scale patterning of fluorescent silver nanoclusters using low-power laser,
    Scientific Reports 6, 23998 (2016). (link) [pdf]
  13. Chang B., Zhou Q., Wu Z., Liu Z., Ras R.H.A., Hjort K.,
    Capillary Self-alignment of Microchips on Soft Template,
    Micromachines 7, 41 (2016). (link) [pdf]
  14. Kunwar P., Turquet L., Hassinen J., Ras R.H.A., Toivonen J., Bautista G.,
    Holographic micro-patterning of fluorescent microstructures comprising silver nanoclusters,
    Optical Materials Express 6, 946-951 (2016). (link) [pdf]
  15. Beyeh N.K., Pan F., Bhowmik S., Mäkelä T., Ras R.H.A., Rissanen K.,
    N-Alkyl Ammonium Resorcinarene Salts as High-Affinity Tetravalent Chloride Receptors,
    Chemistry - A European Journal 22, 1355-1361 (2016). (link) [pdf]
  16. Beyeh N.K., Pan F., Ras R.H.A.,
    N-Alkyl Ammonium Resorcinarene Chloride Receptors for Guest Binding in Aqueous Environment,
    Asian Journal of Organic Chemistry 5, 1027-1032 (2016). (link) [pdf]
  17. Puttreddy R., Beyeh N.K., Kalenius E., Ras R.H.A., Rissanen K.,
    2-Methylresorcinarene: A Very High Packing Coefficient in a Mono-anion Based Dimeric Capsule and the X-Ray Crystal Structure of the Tetra-anion,
    Chemical Communications 52, 8115-8118 (2016). (link) [pdf]

2015 (7)

  1. Hassinen J., Liljeström V., Kostiainen M.A., Ras R.H.A.,
    Rapid Cationization of Gold Nanoparticles by Two-Step Phase Transfer,
    Angewandte Chemie International Edition 54, 7990-7993 (2015). (link) [pdf]
  2. He M., Amara H., Jiang H., Hassinen J., Bichara C., Ras R.H.A., Lehtonen J., Kauppinen E.I., Loiseau A.,
    Key Roles of Carbon Solubility in Single-Walled Carbon Nanotube Nucleation and Growth,
    Nanoscale, 7, 20284-20289 (2015). (link) [pdf]
  3. Arcot L., Ahsan Uddin K.M., Chen X., Wenchao X., Xianming K., Johansson L. S., Ras R.H.A., Rojas O.J.,
    Paper-based plasmon-enhanced protein sensing by controlled nucleation of silver nanoparticles on cellulose,
    Cellulose 22, 4027-4034 (2015). (link) [pdf]
  4. Vapaavuori J., Ras R.H.A., Kaivola M., Bazuin C.G., Priimagi A.,
    From partial to complete optical erasure of azobenzene-polymer gratings: effect of molecular weight,
    Journal of Materials Chemistry C 3, 11011-11016 (2015). (link) [pdf]
  5. Chang B., Shah A., Zhou Q., Ras R.H.A., Hjort K.,
    Self-transport and self-alignment of microchips using microscopic rain,
    Scientific Reports 5, 14966 (2015). (link) [pdf]
  6. Hoshian S., Jokinen V., Hjort K., Ras R.H.A., Franssila S.,
    Amplified and Localized Photoswitching of TiO2 by Micro- and Nanostructuring,
    ACS Applied Materials & Interfaces 7, 15593−15599 (2015). (link) [pdf]
  7. Wang M., Tian X.L., Ras R.H.A., Ikkala O.,
    Sensitive Humidity-Driven Reversible and Bidirectional Bending of Nanocellulose Thin Films as Bio-Inspired Actuation,
    Advanced Materials Interfaces 2, 1500080 (2015). (link) [pdf]

2014 (11)

  1. Kunwar P., Hassinen J., Bautista G., Ras R. H. A., and Toivonen, J.,
    Direct Laser Writing of Photostable Fluorescent Silver Nanoclusters in Polymer Films,
    ACS Nano 8, 11165-11171 (2014). (link) [pdf]
  2. Tian X.L., Jin H., Sainio J., Ras R.H.A., Ikkala O.,
    Droplet and Fluid Gating by Biomimetic Janus Membranes,
    Advanced Functional Materials 24, 6023-6028 (2014). (link) [pdf]
  3. Koskela J.E., Liljeström V., Lim J., Simanek E.E., Ras R.H.A., Priimagi A., Kostiainen M.A.,
    Light-fuelled transport of large dendrimers and proteins,
    Journal of the American Chemical Society 136, 6850-6853 (2014). (link) [pdf]
  4. Chalapat K., Timonen J., Huuppola M., Koponen L., Johans C., Ras R.H.A., Ikkala O, Oksanen M.A., Seppälä E., Paraoanu G.S.,
    Ferromagnetic resonance in epsilon-Co magnetic composites,
    Nanotechnology 25, 485707 (2014). (link) [pdf]
  5. Ghosh A., Hassinen J., Pulkkinen P., Tenhu H., Ras R.H.A., Pradeep T.,
    Simple and Efficient Separation of Atomically Precise Noble Metal Clusters,
    Analytical Chemistry 86, 12185-12190 (2014). (link) [pdf]
  6. Koskela J.E., Vapaavuori J., Ras R.H.A., Priimagi A.,
    Light-Driven Surface Patterning of Supramolecular Polymers with Extremely Low Concentration of Photoactive Molecules,
    ACS Macro Letters 3, 1196-1200 (2014). (link) [pdf]
  7. Nissinen T., Näkki S., Latikka M., Heinonen M., Liimatainen T., Xu W., Ras R.H.A., Gröhn O., Riikonen J., Lehto V.-P.,
    Facile synthesis of biocompatible superparamagnetic mesoporous nanoparticles for imageable drug delivery,
    Mesoporous and Microporous Materials 195, 2-8 (2014). (link) [pdf]
  8. Pulkkinen P., Hassinen J., Ras R.H.A., Tenhu H.,
    Gold Nanoparticles: Calixarene Complexation in a Mixed Calixarene/Alkanethiol Monolayer,
    RSC Advances 4, 13453-13460 (2014). (link) [pdf]
  9. Korhonen J.T., Huhtamäki T., Verho T., Ras R.H.A.,
    Hollow polysiloxane nanostructures based on pressure-induced film expansion,
    Surface Innovations 2, 116-126 (2014). (link) [pdf]
  10. Hassinen J., Pulkkinen P., Kalenius E., Pradeep T., Tenhu H., Häkkinen H., Ras R.H.A.,
    Mixed-Monolayer-Protected Au25 Clusters with Bulky Calix[4]arene Functionalities,
    The Journal of Physical Chemistry Letters 5, 585-589 (2014). (link) [pdf]
  11. Moerland R.J., Koskela J.E., Kravchenko A., Simberg M., van der Vegte S., Kaivola M., Priimagi A., Ras R.H.A.,
    Large-area arrays of three-dimensional plasmonic subwavelength-sized structures from azopolymer surface-relief gratings,
    Materials Horizons 1, 74-80 (2014). (link) [pdf]

2013 (7)

  1. Timonen J.V.I., Latikka M., Leibler L., Ras R.H.A., Ikkala O.,
    Switchable Static and Dynamic Self-Assembly of Magnetic Droplets on Superhydrophobic Surfaces,
    Science 341, 253-257 (2013). (link) [pdf]
  2. Timonen J.V.I., Latikka M., Ikkala O., Ras R.H.A.,
    Free-Decay and Resonant Methods for Investigating the Fundamental Limit of Superhydrophobicity,
    Nature Communications 4, 2398 (2013). (link) [pdf]
  3. Wang M., Anoshkin I.W., Nasibulin A. G., Korhonen J. T., Seitsonen J., Pere J., Kauppinen E.I., Ras R.H.A., Ikkala, O.,
    Modifying Native Nanocellulose Aerogels with Carbon Nanotubes for Mechanoresponsive Conductivity and Pressure Sensing,
    Advanced Materials 25, 2428-2432 (2013). (link) [pdf]
  4. Korhonen J.T., Huhtamäki T., Ikkala O., Ras R.H.A.,
    Reliable measurement of the receding contact angle,
    Langmuir 29, 3858-3863 (2013). (link) [pdf]
  5. Jin H., Tian X.L., Ikkala O., Ras R.H.A.,
    Preservation of Superhydrophobic and Superoleophobic Properties upon Wear Damage,
    ACS Applied Materials & Interfaces 5, 485-488 (2013). (link) [pdf]
  6. Díez I., Ras R.H.A., Kanyuk M.I. and Demchenko A.,
    On heterogeneity in fluorescent few-atom silver nanoclusters,
    Physical Chemistry Chemical Physics 15, 979-985 (2013). (link) [pdf]
  7. Jin H., Cao A., Shi E., Seitsonen J., Zhang L., Ras R.H.A., Berglund L., Ankerfors M., Walther A. and Ikkala O.,
    Ionically Interacting Nanoclay and Nanofibrillated Cellulose Lead to Tough Bulk Nanocomposites in Compression by Forced Self-Assembly,
    Journal of Materials Chemistry B 1, 835-840 (2013). (link) [pdf]

2012 (7)

  1. Mertaniemi H., Forchheimer R., Ikkala O., Ras R.H.A.,
    Rebounding droplet-droplet collisions on superhydrophobic surfaces: from the phenomenon to droplet logic,
    Advanced Materials 24, 5738-5743 (2012). (link) [pdf]
  2. Verho T., Korhonen J. T., Sainiemi L., Jokinen V., Bower C., Franze K., Franssila S., Andrew P., Ikkala O., Ras R.H.A.,
    Reversible Switching between Superhydrophobic States on a Hierarchically Structured Surface,
    Proceedings of the National Academy of Sciences of the United States of America (PNAS) 109, 10210-10213 (2012). (link) (pdf)
  3. Jin H., Marmur A., Ikkala O., Ras R.H.A.,
    Vapour-Driven Marangoni Propulsion: Continuous, Prolonged and Tunable Motion,
    Chemical Science 3, 2526-2529 (2012). (link) (pdf)
  4. Virta A., Timonen J.V.I., Ras R.H.A., Zhou Q.,
    Force sensing using artificial magnetic cilia,
    Intelligent Robots and Systems, IEEE (2012) 1-6. (link) [pdf]
  5. Díez I., Kanyuk M.I., Demchenko A., Walther A., Jiang H., Ikkala O. and Ras R.H.A.,
    Blue, green and red emissive silver nanoclusters formed in organic solvents,
    Nanoscale 4, 4434-4437 (2012). (link) [pdf]
  6. Mertaniemi H., Laukkanen A., Teirfolk J.-E., Ikkala O., Ras R.H.A.,
    Functionalized porous microparticles of nanofibrillated cellulose for biomimetic hierarchically structured superhydrophobic surfaces,
    RSC Advances 2, 2882-2886 (2012). (link) [pdf]
  7. Koskela J.E., Vapaavuori J., Hautala J., Priimagi A., Faul C. F. J., Kaivola M., Ras R.H.A.,
    Surface-Relief Gratings and Stable Birefringence Inscribed Using Light of Broad Spectral Range in Supramolecular Polymer-Bisazobenzene Complexes,
    Journal of Physical Chemistry C 116, 2363-2370 (2012). (link) [pdf]

2011 (12)

  1. Verho T., Bower C., Andrew P., Franssila S., Ikkala O., Ras R.H.A.,
    Mechanically Durable Superhydrophobic Surfaces,
    Advanced Materials 23, 673-678 (2011). (link) (pdf)
  2. Mertaniemi H., Sainiemi L., Jokinen V., Franssila S., Marmur A., Ikkala O., Ras R.H.A.,
    Superhydrophobic Tracks for Low-Friction, Guided Transport of Water Droplets,
    Advanced Materials 23, 2911-2914 (2011). (link) [pdf]
  3. Timonen J.V.I., Seppälä E.T., Ikkala O., Ras R.H.A.,
    From Hot-Injection Synthesis to Heating-Up Synthesis of Cobalt Nanoparticles: Observation of Kinetically Controllable Nucleation,
    Angewandte Chemie International Edition 50, 2080-2084 (2011). (link) [pdf]
  4. Korhonen J.T., Hiekkataipale P., Malm J., Karppinen M., Ikkala O., Ras R.H.A.,
    Inorganic Hollow Nanotube Aerogels by Atomic Layer Deposition onto Native Nanocellulose Templates,
    ACS Nano 5, 1967-1974 (2011). (link) [pdf]
  5. Kettunen M., Silvennoinen R. J., Houbenov N., Nykänen A., Ruokolainen J., Sainio J., Pore V., Kemell M., Ankerfors M., Lindström T., Ritala M., Ras R.H.A., Ikkala O.,
    Photoswitchable Superabsorbency Based on Nanocellulose Aerogels,
    Advanced Functional Materials 21, pp. 510-517 (2011). (link) [pdf]
  6. Chang B., Sariola V., Aura S., Ras R.H.A., Klonner M., Lipsanen H., Zhou Q.,
    Capillary-driven self-assembly of microchips on oleophilic/oleophobic patterned surface using adhesive droplet in ambient air,
    Applied Physics Letters 99, 034104 (2011). (link) [pdf]
  7. Díez I., Eronen P., Österberg M., Linder M., Ikkala O., Ras R.H.A.,
    Functionalization of Nanofibrillated Cellulose with Silver Nanoclusters: Fluorescence and Antibacterial Activity,
    Macromolecular Bioscience 11, 1185-1191 (2011). (link) [pdf]
  8. Marmur A., Ras R.H.A.,
    The porous nano-fibers raft: analysis of load-carrying mechanism and capacity,
    Soft Matter 7, 7382-7385 (2011). (link) [pdf]
  9. Karakashev S.I., Grozev N., Díez I., Ras R.H.A., Tsekov R.,
    Rheology of Silver Nanocluster Solutions under Confinement,
    Colloids and Surfaces A 384, 570-573 (2011). (link) [pdf]
  10. Korhonen J.T., Kettunen M., Ras R.H.A., Ikkala O.,
    Hydrophobic Nanocellulose Aerogels as Floating, Sustainable, Reusable, and Recyclable Oil Absorbents,
    ACS Applied Materials & Interfaces 3, 1813-1816 (2011). (link) [pdf]
  11. Díez I. and Ras R.H.A.,
    Fluorescent silver nanoclusters,
    Nanoscale 3, 1963-1970 (2011). (link) [pdf]
  12. Jin H., Kettunen M., Laiho A., Pynnönen H., Paltakari J., Marmur A., Ikkala O., Ras R.H.A.,
    Superhydrophobic and Superoleophobic Nanocellulose Aerogel Membranes as Bioinspired Cargo Carriers on Water and Oil,
    Langmuir 27, 1930-1934 (2011). (link) [pdf]

2010 (8)

  1. Díez I., Jiang H., Ras R.H.A.,
    Enhanced Emission of Silver Nanoclusters Through Quantitative Phase Transfer,
    ChemPhysChem 11, 3100-3104 (2010). (link) [pdf]
  2. Pohjalainen E., Pohjakallio M., Johans C., Kontturi K., Timonen J.V.I., Ikkala O., Ras R.H.A., Viitala T., Heino M.T., Seppälä E.T.,
    Cobalt nanoparticle Langmuir-Schaefer films on ethylene glycol subphase,
    Langmuir 26, 13937-13943 (2010). (link) [pdf]
  3. Timonen J.V.I., Johans C., Kontturi K., Walther A., Ikkala O., Ras R.H.A.,
    A Facile Template-Free Approach to Magnetodriven, Multifunctional Artificial Cilia,
    ACS Applied Materials & Interfaces 2, 2226-2230 (2010). (link) [pdf]
  4. Timonen J.V.I., Ras R.H.A., Ikkala O., Oksanen M., Seppälä E., Chapalat K., Li J., Paraoanu G.S.,
    Magnetic Nanocomposites at Microwave Frequencies,
    Trends in Nanophysics: Theory, Experiment and Technology. Bârsan V., Aldea A. (eds.) Springer-Verlag Berlin Heidelberg 1, 257-286 (2010). (link) [pdf]
  5. Díez I., Ras R.H.A.,
    Few-Atom Silver Clusters as Fluorescent Reporters,
    Advanced Fluorescence Reporters in Chemistry and Biology II, Springer Series on Fluorescence 9, 307-332 (2010). (link) [pdf]
  6. Kekkonen V., Hakola A., Kajava T., Sahramo E., Malm J., Karppinen M., Ras R.H.A.,
    Self-erasing and rewritable wettability patterns on ZnO thin films,
    Applied Physics Letters 97, 044102 (2010). (link) [pdf]
  7. Díez I., Hahn H., Ikkala O., Börner H. G., Ras R.H.A.,
    Controlled growth of silver nanoparticle arrays guided by a self-assembled polymer-peptide conjugate,
    Soft Matter 6, 3160-3162 (2010). (link) [pdf]
  8. Malm J., Sahramo E., Karppinen M., Ras R.H.A.,
    Photo-Controlled Wettability Switching by Conformal Coating of Nanoscale Topographies with Ultrathin Oxide Films,
    Chemistry of Materials 22, 3349-3352 (2010). (link) [pdf]

2009 (2)

  1. Ikkala O., Ras R.H.A., Houbenov N., Ruokolainen J., Pääkkö M., Laine J., Leskelä M., Berglund L.A., Lindström T., ten Brinke G., Iatrou H., Hadjichristidis N. and Faul C.F.J.,
    Solid state nanofibers based on self-assemblies: from cleaving from self-assemblies to multilevel hierarchical constructs,
    Faraday Discussions 143, 95-107 (2009). (link) [pdf]
  2. Díez I., Pusa M., Kulmala S., Jiang H., Walther A., Goldmann A.S., Müller A.H.E., Ikkala O., Ras R.H.A.,
    Color Tunability and Electrochemiluminescence of Silver Nanoclusters,
    Angewandte Chemie International Edition 48, 2122-2125 (2009). (link) [pdf]

2008 (2)

  1. Baral J.K., Majumdar H.S., Laiho A., Jiang H., Kauppinen E.I., Ras R.H.A., Ruokolainen J., Ikkala O., Österbacka R.,
    Organic memory using [6,6]-phenyl-C-61 butyric acid methyl ester: morphology, thickness and concentration dependence studies,
    Nanotechnology 19, 035203/1-7 (2008). (link) [pdf]
  2. Ras R.H.A., Sahramo E., Malm J., Raula J., Karppinen M.,
    Blocking the Lateral Film Growth at the Nanoscale in Area-Selective Atomic Layer Deposition,
    J. Am. Chem. Soc. 130, 11252-11253 (2008). (link) [pdf]

2007 (4)

  1. Ras R.H.A., Kemell M., De Wit J., Ritala M., Ten Brinke G., Leskelä M., Ikkala O.,
    Hollow inorganic nanospheres and nanotubes with tunable wall thicknesses by atomic layer deposition on self-assembled polymeric templates,
    Advanced Materials 19, 102-106 (2007). (link) [pdf]
  2. Ras R.H.A., Ruotsalainen T., Laurikainen K., Linder M.B., Ikkala O.,
    Hollow nanoparticle nanotubes with a nanoscale brick wall structure of clay mineral platelets,
    Chemical Communications 13, 1366-1368 (2007). (link) [pdf]
  3. Ras R.H.A., Umemura Y., Johnston C.T., Yamagishi A., Schoonheydt R.A.,
    Ultrathin hybrid films of clay minerals,
    Physical Chemistry Chemical Physics 9, 918-932 (2007). (link) [pdf]
  4. Ras R.H.A., Schoonheydt R.A., Johnston C.T.,
    Relation between s-polarized and p-polarized internal reflection spectra: application for the spectral resolution of perpendicular vibrational modes,
    Journal of Physical Chemistry A 111, 8787-8791 (2007). (link) [pdf]

2006 (1)

  1. Laiho A., Ras R.H.A., Valkama S., Ruokolainen J., Österbacka R., Ikkala, O.,
    Control of Self-Assembly by Charge-Transfer Complexation between C60 Fullerene and Electron Donating Units of Block Copolymers,
    Macromolecules 39, 7648-7653 (2006). (link) [pdf]

2005 (2)

  1. Priimagi A., Cattaneo S., Ras R.H.A., Valkama S., Ikkala O., Kauranen M.,
    Polymer-dye complexes: A facile method for high doping level and aggregation control of dye molecules,
    Chemistry of Materials 17, 5798-5802 (2005). (link) [pdf]
  2. Ras R.H.A., Johnston C.T., Schoonheydt R.A.,
    Chemical instability of octadecylammonium monolayers,
    Chemical Communications 32, 4095-4097 (2005). (link) [pdf]

2004 (3)

  1. Ras R.H.A., Németh J., Johnston C.T., Dékány I., Schoonheydt R.A.,
    Orientation and conformation of octadecyl rhodamine B in hybrid Langmuir-Blodgett monolayers containing clay minerals,
    Physical Chemistry Chemical Physics 6, 5347-5352 (2004). (link) [pdf]
  2. Ras R.H.A., Németh J., Johnston C.T., DiMasi E., Dékány I., Schoonheydt R.A.,
    Hybrid Langmuir-Blodgett monolayers containing clay minerals: effect of clay concentration and surface charge density on the film formation,
    Physical Chemistry Chemical Physics 6, 4174-4184 (2004). (link) [pdf]
  3. Ras R.H.A., Németh J., Johnston C.T., Dékány I., Schoonheydt R.A.,
    Infrared reflection absorption spectroscopy study of smectite clay monolayers,
    Thin Solid Films 466, 291-294 (2004). (link) [pdf]

2003 (1)

  1. Ras R.H.A., Johnston C.T., Franses E.I., Ramaekers R., Maes G., Foubert P., De Schryver F.C., Schoonheydt R.A.,
    Polarized infrared study of hybrid Langmuir-Blodgett monolayers containing clay mineral nanoparticles,
    Langmuir 19, 4295-4302 (2003). (link) [pdf]

2001 (1)

  1. van Duffel B., Ras R.H.A., De Schryver F.C., Schoonheydt R.A.,
    Langmuir-Blodgett deposition and optical diffraction of two-dimensional opal,
    Journal of Materials Chemistry 11, 3333-3336 (2001). (link) [pdf]
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