Subscribe to our free daily newsletters
. 24/7 Space News .




Subscribe to our free daily newsletters



CARBON WORLDS
Researchers create tiny sensor using 'white graphene'
by Brooks Hays
Washington (UPI) Jun 28, 2017


Researchers have developed a new method for creating tiny mechanical sensors using "white graphene."

The sensor is made by placing white graphene, a 2D atomic sheet of hexagonal boron nitride, over the minuscule holes in a silicon substrate. Scientists say the material could serve as tiny gas and pressure sensors inside electronics.

The hexagonal structure of white graphene is similar to that of regular graphene, but the atomic layer is made up of boron nitride, the compound of boron and nitrogen, instead of carbon. Graphene is prized for its conductive qualities, but hexagonal boron nitride, or h-BN, works as an insulator.

White graphene is also more chemically and electrically stable than graphene, allowing it to function under more extreme circumstances, like in space.

Until, scientists have struggled to develop a scaleable way to make 2D layers of h-BN. Layers of graphene are easily exfoliated from graphite, but h-BN layers stick to one another.

"There are only two or three institutions in the world that can produce single, two-dimensional layers of white graphite, and the University of Cambridge is one of them," lead researcher Santiago J. Cartamil-Bueno said in a news release. "This project is a success thanks to our effective collaboration with them."

Cambridge scientists used a method called chemical vapor deposition to deposit single layers of hexagonal boron nitride on a sheet of iron foil.

Scientists at Delft University of Technology in the Netherlands used the white graphene layers from Cambridge to build the miniature sensors. By placing the white graphene over tiny cavities in a silicon substrate, researchers created tiny drums that work like mechanical resonators.

During the sensor-production process, scientists realized the drums were being contaminated by the polymer, making each drum-turned-sensor behavior slightly differently. Precision and consistency are essential to mechanical sensors. Researchers found that by treating the drums with ozone, they could rid the sensors of imperfections.

"Fortunately, this problem can be solved by only using organic substrates while transferring the sheet of white graphite onto the cavities," said Cartamil-Bueno.

Researchers detailed their breakthrough this week in the journal Nature. The next step is for scientist to incorporate the tiny sensors into actual electronics.

CARBON WORLDS
Ultra-compact phase modulators based on graphene plasmons
Washington DC (SPX) Jun 28, 2017
Modulating the amplitude and phase of light is a key ingredient for many of applications such as wavefront shaping, transformation optics, phased arrays, modulators and sensors. Performing this task with high efficiency and small footprint is a major challenge for the development of optoelectronic devices. In a recent paper published in Nature Photonics, ICFO researchers Dr. Achim Woessner ... read more

Related Links
Carbon Worlds - where graphite, diamond, amorphous, fullerenes meet


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

CARBON WORLDS
Return to the blue

NASA Selects Army Surgeon for Astronaut Training

Teachers doubt most students interested in subjects that promote space careers

Plants to feed Earth and beyond

CARBON WORLDS
Orbex reveals space rocket factory

Developing Landing Tech for Space

Arianespace to orbit Airbus' upcoming constellation of observation satellites

Arianespace signs its initial launch contract for the new Vega C launcher

CARBON WORLDS
No One Under 20 Has Experienced a Day Without NASA at Mars

Mars Orbiter spots rover ascending Mount Sharp

India's Mars Orbiter Mission Completes First 1,000 Earth Days

University Students Mine for Water at NASA's Mars Ice Challenge

CARBON WORLDS
China's cargo spacecraft completes second docking with space lab

China to launch four more probes before 2021

New broadcasting satellite fails to enter preset orbit

China launches remote-sensing micro-nano satellites

CARBON WORLDS
Gravitational wave mission selected, planet-hunting mission moves forward

Boeing Streamlining Defense and Space Unit to boost competitiveness

Trudeau under pressure to reject China bid for satellite firm

Jumpstart goes into alliance with major aerospace and defence group ADS

CARBON WORLDS
Lightweight steel production breakthrough: Brittle phases controlled

3-D-printed jars in ball-milling experiments

Nagoya University chemists turn metal catalysis on its head for a sustainable future

One billion suns: World's brightest laser sparks new behavior in light

CARBON WORLDS
Could a Dedicated Mission to Enceladus Detect Microbial Life There

New branch in family tree of exoplanets discovered

NASA discovers 10 new Earth-size exoplanets

Finding new Earths: PLATO spacecraft to be built

CARBON WORLDS
NASA Completes Study of Future 'Ice Giant' Mission Concepts

King of the Gods: Jupiter Dated to Be Oldest Planet in the Solar System

New Horizons Team Digs into New Data on Next Flyby Target

A whole new Jupiter with first science results from Juno




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement