Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Prototype device for measuring graphene-based electromagnetic radiation created

28.10.2016

Russian scientists have created a prototype device for measuring graphene-based electromagnetic radiation

Bolometer is a device for measuring electromagnetic radiation energy flow based on measurement of variations of physical parameters of thermosensitive element as a result of heating by absorption of radiation energy.


This is a schematic of the structuring of graphene oxide: Photo microstructuring; Prototype circuit of the bolometer and its work.

Credit: Stanislav Evlashin

"We studied thermal and optical properties of the carbon structures derived from the reduced graphene oxide in a wide range of wavelengths from visible to infrared. In addition to the optical and thermal properties of the carbon structures, we have demonstrated the bolometer prototype that operates at room temperature without additional cooling", says Stanislav Evlashin, the first author of the article, the researcher of the Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University (SINP MSU), PhD in Physico-Mathematical Sciences.

Synthesis and investigations of the new materials for bolometric sensors have a great scientific and practical importance. Such materials should possess a high effective absorption over a wide spectral range, high stable thermoresistive effect (change in electrical conductance with temperature), and, of course, they must be cheap to manufacture.

To create bolometer prototype the water solution of graphene oxide was used, which was obtained by the standard method of graphite oxidation, which is known and widely used. The resulting suspension of graphene oxide was deposited on the substrate for subsequent laser microstructuring. Laser treatment causes partial reduction of graphene oxide film and changes morphology, consequently, it changes optical and thermal properties of graphene oxide.

The material synthesis and development of the bolometer prototype was held at SINP MSU. Studies on the optical properties were carried out at Physics Department of Moscow State University. Research on the thermal properties were carried out at LPI RAS.

"Laser microstructuring of graphene oxide opens up the possibility of selective creation of antireflective, thermally-conductive and electrically-conductive coatings. Developed method is quite cheap, compatible with conventional semiconductor technology and allows you to create antiabsorbing coatings that would cover large areas on almost any surface. The observed properties of reduced graphene oxide partially show the prospects of it's use in bolometric matrices and other IR devices," - says Stanislav Evlashin.

Media Contact

Vladimir Koryagin
science-release@rector.msu.ru

http://www.msu.ru 

Vladimir Koryagin | EurekAlert!

More articles from Power and Electrical Engineering:

nachricht Researchers take next step toward fusion energy
16.11.2017 | Texas A&M University

nachricht Desert solar to fuel centuries of air travel
16.11.2017 | SolarPACES

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Previous evidence of water on mars now identified as grainflows

21.11.2017 | Physics and Astronomy

NASA's James Webb Space Telescope completes final cryogenic testing

21.11.2017 | Physics and Astronomy

New catalyst controls activation of a carbon-hydrogen bond

21.11.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>