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Nanomaterials (NMG)

The NanoMaterials Group, headed by Prof. Esko I. Kauppinen, is among the top aerosol technology laboratories in the world and offers a unique environment for strong interdisciplinary research and a proven track record of productive cooperation.
Nanomaterials

The main research areas of the group are

  • the aerosol synthesis and mechanistic studies of formation of carbon nanotubes and inorganic nanoparticles
  • the applications of carbon nanotubes in transparent and flexible electronics
  • pharmaceutical nanoparticles and nanostructured microparticles as drug delivery systems
  • high resolution electron microscopy
Group leader Esko Karppinen

Group leader

Esko Kauppinen

Professor Esko I. Kauppinen, PhD (Physics) is the Vice Dean responsible for research, innovations and industry relationships at the Aalto University School of Science and Tenured Professor of Physics at the Department of Applied Physics. He has published more than 390 scientific journal papers in Nature NanotechnologyNanoLetters, ACS Nano, Angewandte Chemie, Carbon, Energy and Environmental Sciences among others, has a Hirsch-index over 43 and over 7500 citations.  He has given more than 100 keynote and invited conference talks and 200+ talks at world-leading companies and universities. He is considered one of the world's expert authors in the area of single walled carbon nanotube synthesis, characterisation and thin film applications, as well as in the gas phase synthesis of particles for inhalation drug delivery. He is the founding member of the companies Canatu Oy and Teicos Pharma Oy.

Read more on research.aalto.fi

Research

The NanoMaterials group is active in several research fields:

  • Aerosol-based synthesis of nanomaterials: single-walled and multiwalled carbon nanotubes (CNTs), metal and metal oxide catalyst nanoparticles
  • Carbon nanotube based thin film electronics: transparent conducting electrodes (TCEs), thin film transistors (TFTs), sensors
  • Pharmaceutical nanomaterials: nanostructured microparticles and nanoparticles for  drug delivery and controlled release
  • Electron microscopy: atomic resolution imaging of nanomaterials, EDX, chirality measurements of CNTs
  • Aerosol measurements and techniques: Differential Mobility Analysis (DMAs), nanoaerosol deposition by thermophoretic and electrostatic precipitators
  • Computational Fluid Dynamics (CFD)

Facilities

The Nanomaterials group has a wide range of experimental facilities for the synthesis of carbon nanotubes and for their characterization as well as for developing pharmaceutical inhalation products.

Aerosol reactors for drug delivery systems

The Nanomaterials Group has developed the Aerosol Flow Reactor Method to formulate nano- and microparticles for pharmaceutical applications. The aerosol method enables formulating materials with different solubilities and thermal properties as novel platforms for controlled drug delivery, non-viral vectors for gene therapy and carrier-free drug powders for inhalation therapy.

Current focus areas

  • Next generation pulmonary delivery of therapeutic peptides
  • Efficient pulmonary delivery of poorly water-soluble drugs
  • Coating and encapsulation of combination drugs for pulmonary delivery

Aerosol flow reactor

Solutions where materials are dissolved are dispersed into droplets which are carried to the aerosol reactor with a gas. The particles are dried in a laminar flow followed by the coating process. Dry particles are collected by a cyclone or impactor. The general features of the aerosol reactor are listed below.

  • Jet atomizer: droplet size 300 nm, production 104-105 1/cm3
  • Ultrasonic nebulizer: droplet size 3-4 µm, production 105-106 1/cm3
  • Temperature 20-300 ºC, flow rate 1-20 l/min
  • Solvent options are many, however, no solvent mixtures are recommended

Carbon nanotube reactors

The Nanomaterials Group operates five carbon nanotube reactors based on the aerosol-based synthesis technique.

Diverse equipment

Latest publications

NanoMaterials, Department of Applied Physics

Is there chiral correlation between graphitic layers in double-wall carbon nanotubes?

Publishing year: 2019 Carbon
Department of Applied Physics, NanoMaterials

Cutting floating single-walled carbon nanotubes with a ‘CO<sub>2</sub> blade’

Publishing year: 2019 Carbon
Department of Chemistry and Materials Science, Paper Converting and Packaging, Department of Bioproducts and Biosystems, Biohybrid materials, NanoMaterials, Department of Applied Physics, Analytical Chemistry

Hot electron-induced electrochemiluminescence at cellulose derivatives-based composite electrodes

Publishing year: 2019 Journal of Electroanalytical Chemistry
NanoMaterials, Department of Applied Physics

Press hardening of zinc-coated boron steels

Publishing year: 2018 Surface and Coatings Technology
Electrochemical Energy Conversion, Department of Chemistry and Materials Science, Department of Applied Physics, Surface Science, NanoMaterials

Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles

Publishing year: 2018 ACS Applied Materials and Interfaces
Department of Applied Physics, NanoMaterials

Gas phase synthesis of metallic and bimetallic catalyst nanoparticles by rod-to-tube type spark discharge generator

Publishing year: 2018 Journal of Aerosol Science
Department of Applied Physics, NanoMaterials

Direct Synthesis of Colorful Single-Walled Carbon Nanotube Thin Films

Publishing year: 2018 Journal of the American Chemical Society
Department of Electronics and Nanoengineering, NanoMaterials, Department of Applied Physics, Centre of Excellence in Quantum Technology, QTF, Harri Lipsanen Group, Zhipei Sun Group

Nanowire network–based multifunctional all-optical logic gates

Publishing year: 2018 Science Advances
Department of Applied Physics, NanoMaterials

Measurement of in-plane sheet thermal conductance of single-walled carbon nanotube thin films by steady-state infrared thermography

Publishing year: 2018 Japanese Journal of Applied Physics
Department of Applied Physics, NanoMaterials

High-performance single-walled carbon nanotube transparent conducting film fabricated by using low feeding rate of ethanol solution

Publishing year: 2018 Royal Society Open Science
More information on our research in the Research database.
Research database

Research group members

Saeed Ahmad

Department of Applied Physics
Doctoral Candidate
Erxiong Ding

Erxiong Ding

Department of Applied Physics
Doctoral Candidate
Aqeel Hussain

Aqeel Hussain

Department of Applied Physics
Doctoral Candidate
Hua Jiang

Hua Jiang

Department of Applied Physics
Senior Scientist
Esko Kauppinen

Esko Kauppinen

Department of Applied Physics
Professor

Yongping Liao

Department of Applied Physics
Doctoral Candidate
Mohammad Tavakkoli

Mohammad Tavakkoli

Department of Applied Physics
Postdoctoral Researcher

Nurcin Ugur

Department of Applied Physics
Doctoral Candidate
Nan Wei

Nan Wei

Department of Applied Physics
Postdoctoral Researcher

Qiang Zhang

Department of Applied Physics
Postdoctoral Researcher