Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Graphene Rainbow

27.01.2012
Superhydrophobic graphene surfaces mimic the properties of butterfly wings and rose petals

Butterfly wings, rose petals and many other natural surfaces repell water strongly; they are superhydrophobic.


Such surfaces have a hierarchical structure on the micrometer or nanometer scale. Their attractive properties and spectacular iridescent colors have triggered a group led by Hong-Bo Sun of Jilin University to prepare a superhydrophobic graphene surface with properties comparable to its natural counterparts. They report their findings in Chemistry – An Asian Journal.

The team from Changchun, China, split a 355 nm laser beam into two branches and guided them to interfere directly on the surface of a graphene oxide film. This method fabricates a periodic microscale grating structure while simultaneously removing the oxygen from the graphene oxide film.

The resulting superhydrophobic film showed colorful iridescence and unique high adhesion. Water droplets were repelled to show contact angles of up to almost 160° depending on laser power.

"Such surfaces could be used for applications in water transport and microfluidic devices," says Sun, who demonstrated how the wettability of graphene can be controlled.

Author: Hong-Bo Sun, Jilin University, Changchun (China), http://www.lasun-jlu.cn/people.php

Title: Biomimetic Graphene Surfaces with Superhydrophobicity and Iridescence
Chemistry - An Asian Journal, Permalink to the article: http://dx.doi.org/10.1002/asia.201100882

Hong-Bo Sun | Wiley-VCH
Further information:
http://www.wiley-vch.de

Further reports about: Changchun Rainbow Lake Sun graphene graphene oxide microfluidic device

More articles from Life Sciences:

nachricht More genes are active in high-performance maize
19.01.2018 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht How plants see light
19.01.2018 | Albert-Ludwigs-Universität Freiburg im Breisgau

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Let the good tubes roll

19.01.2018 | Materials Sciences

How cancer metastasis happens: Researchers reveal a key mechanism

19.01.2018 | Health and Medicine

Meteoritic stardust unlocks timing of supernova dust formation

19.01.2018 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>