Soft Matter and Wetting

Water droplets rolling on a superhydrophobic copper surface
Prof. Robin Ras, the head of Soft Matter and Wetting research group. Photo by Mikko Raskinen
Professor Robin Ras, the head of Soft Matter and Wetting research group. Photo by Mikko Raskinen

Robin Ras, Associate Professor

OPEN POSITION!

We are looking for a highly motivated doctoral candidate in experimental physics. Your research will focus on dynamic events at solid-liquid interfaces, in particular using liquid-repellent surfaces. The work is related to our results on superhydrophobic surfaces (Science 2019 https://science.sciencemag.org/content/363/6432/1147, Science 2016 https://science.sciencemag.org/content/352/6282/142, Nature Communications 2017 https://www.nature.com/articles/s41467-017-01510-7 ).

Interested? Contact Prof. Robin Ras directly via e-mail: [email protected]

Soft Matter and Wetting (SMW) is a multidisciplinary research group consisting of physicists and chemists. We are interested in functional soft materials and the wettability of surfaces. Many of the materials we work on are inspired by nature, such as extremely water-repellent biological surfaces that provide the basis for synthetic superhydrophobicity.

HYBER

The SMW group is a member of HYBER, the Academy of Finland's Centre of Excellence in Molecular Engineering of Biosynthetic Hybrid Materials research (2014-2019).

ERC Consolidator Grant

The leader of the SMW group, Professor Robin Ras, has received a Consolidator Grant from the European Research Council (ERC). The topic of this five-year project is "Superslippery Liquid-Repellent Surfaces".

Research highlight

The SMW group and their collaborators introduce a new method for wetting characterization of surfaces. The new Scanning Droplet Adhesion Microscopy (SDAM) technique is 1000 times more sensitive than the existing commercial force tensiometers, and enables detailed wetting mapping of topographically complex, liquid-repellent surfaces.

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, 1978 (2017). (link) [pdf] (press release)

 Scanning Droplet Adhesion Microscopy (SDAM) technique is 1000 times more sensitive than the existing commercial force tensiometers, and enables detailed wetting mapping of topographically complex, liquid-repellent surfaces. The image shows a schematic of droplet adhesion -based wetting mapping on a Striped Crow Butterfly wing. Maja Vuckovac / Aalto university
Scanning Droplet Adhesion Microscopy allows visualizing local variations in wetting, such as here shown for a butterfly wing. Aalto University / Maja Vuckovac
A family portrait of ferrofluid drops under magnetic field
Department of Applied Physics
Water droplet suspended on a micropillar surface

FACILITIES: Soft Matter and Wetting group

List of our research equipment and facilities.

Department of Applied Physics

CODES: Soft Matter and Wetting group

Useful program codes published as part of our works.

Department of Applied Physics
A ferrofluid droplet sitting on a measurement surface in the oscillating droplet tribometer measurement scheme. The magnet underneath the surface is also seen.

Oscillating Droplet Tribometer. The most accurate characterization of your superhydrophobic surface.

Wetting characterization services offered by Soft Matter and Wetting group.

Department of Applied Physics

Research group members

Robin Ras

Robin Ras

Soft Matter and Wetting
Associate Professor
Matilda Backholm

Matilda Backholm

Soft Matter and Wetting
Academy Postdoctoral Researcher
Sourov Chandra

Sourov Chandra

Department of Applied Physics
Postdoctoral Researcher
Matti Hokkanen

Matti Hokkanen

Department of Applied Physics
Postdoctoral Researcher
Kai Liu

Kai Liu

Department of Applied Physics
Postdoctoral Researcher
Maja Vuckovac

Maja Vuckovac

Soft Matter and Wetting
Postdoctoral Researcher
Cunming Yu

Cunming Yu

Department of Applied Physics
Postdoctoral Researcher
Tommi Huhtamäki

Tommi Huhtamäki

Department of Applied Physics
Doctoral Candidate
Mika Latikka

Mika Latikka

Department of Applied Physics
Doctoral Candidate
Muhammad Junaid

Muhammad Junaid

Department of Applied Physics
Doctoral Candidate
Sakari Lepikko

Sakari Lepikko

Soft Matter and Wetting
Doctoral Candidate
Heikki Nurmi

Heikki Nurmi

Department of Applied Physics
Doctoral Candidate
Hedar Al-Terke

Hedar Al-Terke

Department of Applied Physics
Doctoral Candidate
Shaochen Zhou

Shaochen Zhou

Department of Applied Physics
Doctoral Candidate

News

What's new in Soft Matter and Wetting?

Water droplet on a surface
Press releases Published:

Are we at the limits of measuring water-repellent surfaces?

As we develop extremely liquid-repellent surfaces, the errors in existing measurement techniques are getting too large.
Anton Paar Research Award to Robin Ras and Quan Zhou
Honoured Published:

Anton Paar Research Award to Robin Ras and Quan Zhou

Anton Paar Research Award to Robin Ras and Quan Zhou
Vuckovac_award
Research & Art Published:

Dr. Maja Vuckovac receives 2018 Exerowa-Platikanov Award

Dr. Vuckovac was granted the Exerowa-Platikanov Award for best oral presentation at the European Colloid and Interface Society (ECIS) annual conference 2018
Image: Mika Latikka / Aalto University.
Research & Art Published:

Wetting of surfaces is surprisingly difficult to measure reliably

A group of researchers from Aalto University in Finland and Sun Yat-sen University in China provide a standardised approach to improve the accuracy and reliability of contact angle measurements of surfaces.

Open Positions at Soft Matter and Wetting group

No funded positions at the moment. However, if you are interested in joining with your own funding, please contact Robin Ras.

Follow Robin Ras and his research group

Logos of the funding bodies of the SMW group (EU & the European Research Council, Academy of Finland and Business Finland)
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