Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Researchers probe the next generation of 2D materials

Abstract:
As the properties and applications of graphene continue to be explored in laboratories all over the world, a growing number of researchers are looking beyond the one-atom-thick layer of carbon for alternative materials that exhibit similarly captivating properties.

Researchers probe the next generation of 2D materials

London, UK | Posted on April 4th, 2014

One of these materials is molybdenum disulfide (MoS2), which is part of a wider group of materials known as transition metal dichalcogenides, and has been put forward by a group of researchers in the US as a potential building block for the next generation of low-cost electrical devices.

Due to its impressive ability to convert light into electricity at an extremely efficient rate, single layers of the semiconducting material have been used to fabricate a widely used device known as a photosensor, which is found in a range of appliances from solar panels and digital cameras to remote controls.

The device has been presented today, 4 April, in the very first issue of IOP Publishing's new journal 2D Materials—a multidisciplinary journal with a focus on applications and fundamental science concerning all aspects of graphene and 2D materials.

In their study, the researchers highlighted the suitability of MoS2 by successfully demonstrating the photosensor's ability to efficiently convert the energy from photons, delivered to the device in two separate wavelengths by a laser, into an electric current.

Lead author of the research, Nestor Perea-Lopez, from The Pennsylvania State University, said: "The thinnest foil of MoS2 has a thickness of three atoms. One can picture this monolayer foil as a sandwich, where sulfur atoms are the bread and molybdenum is the ham. The monolayer is even more interesting than the material in bulk, because in such thin form it can convert photons into electrons very efficiently, making it an ideal material to use in light detectors, such as the ones used in digital cameras."

A significant challenge that remains for researchers working with 2D materials is how to produce the materials in bulk. Graphene, for example, can only be produced in bulk through a liquid phase or by exfoliating graphite into very thin layers or flakes, which can be very difficult to control.

The goal is to be able to synthesize 2D materials using a bottom-up approach, carefully piecing individual components together like building blocks.

The researchers did this successfully in their study by growing tiny triangles of single-layered MoS2, around five micrometers wide, onto a silica-based substrate using a bottom-up process known as chemical vapour deposition.

"The devices we built are very small which means that we could integrate millions in a few millimeter squares," said Perea-Lopez.

On the suitability of MoS2 as an alternative to graphene, Perea-Lopez continued: "Graphene is a semi-metal, which means that electrons can move through the material very fast even with very small voltages; however, this is both an advantage and disadvantage, since electronic devices need to have an 'on' and 'off' state. Graphene devices can therefore be hard to turn off, but MoS2 has a large energy gap that allows it to have very large on/off ratios of hundreds of millions.

"Not everything about graphene is wrong though, and the path in this field must be the integration of metals and semi-metals, such as graphene, with insulators such as boron nitride and semiconductors like MoS2 to create the next generation of devices."

####

About Institute of Physics
The Institute of Physics is a leading scientific society. We are a charitable organisation with a worldwide membership of more than 50,000, working together to advance physics education, research and application. We engage with policymakers and the general public to develop awareness and understanding of the value of physics and, through IOP Publishing, we are world leaders in professional scientific communications.

IOP Publishing

IOP Publishing provides a range of journals, magazines, websites and services that enable researchers and research organisations to reach the widest possible audience for their research. We combine the culture of a learned society with global reach and highly efficient and effective publishing systems and processes. With offices in the UK, US, Germany, China and Japan, and staff in many other locations including Mexico and Russia, we serve researchers in the physical and related sciences in all parts of the world. IOP Publishing is a wholly owned subsidiary of the Institute of Physics. The Institute is a leading scientific society promoting physics and bringing physicists together for the benefit of all. Any profits generated by IOP Publishing are used by the Institute to support science and scientists in both the developed and developing world. Go to ioppublishing.org.

2D Materials

2D Materials is a multidisciplinary, electronic-only journal devoted to publishing fundamental and applied research of the highest quality and impact covering all aspects of graphene and related two-dimensional materials.

For more information, please click here

Contacts:
Michael Bishop

01-179-301-032

Copyright © Institute of Physics

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Dpwnload paper:

Access to Research is an initiative through which the UK public can gain free, walk-in access to a wide range of academic articles and research at their local library. This article is freely available through this initiative. For more information, go to:

Related News Press

News and information

Toyocolor to Launch New Carbon Nanotube Materials at nano tech 2015 January 24th, 2015

NANOPOSTER 2015 - 5th Virtual Nanotechnology Conference - call for abstracts January 24th, 2015

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

The latest fashion: Graphene edges can be tailor-made: Rice University theory shows it should be possible to tune material's properties January 24th, 2015

Graphene

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

The latest fashion: Graphene edges can be tailor-made: Rice University theory shows it should be possible to tune material's properties January 24th, 2015

Iranian Scientists Produce Graphene-Based Oxygen Sensor January 23rd, 2015

Chip Technology

The latest fashion: Graphene edges can be tailor-made: Rice University theory shows it should be possible to tune material's properties January 24th, 2015

New method to generate arbitrary optical pulses January 21st, 2015

New signal amplification process set to transform communications, imaging, computing: UC San Diego researchers discover a mechanism to amplify signals in optoelectronic systems that is far more efficient than standard processes January 21st, 2015

Solving an organic semiconductor mystery: Berkeley Lab researchers uncover hidden structures in domain interfaces that hamper performance January 16th, 2015

Discoveries

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

The latest fashion: Graphene edges can be tailor-made: Rice University theory shows it should be possible to tune material's properties January 24th, 2015

Iranian Scientists Produce Graphene-Based Oxygen Sensor January 23rd, 2015

Silver nanowires demonstrate unexpected self-healing mechanism: The material has potential for flexible electronics January 23rd, 2015

Announcements

Toyocolor to Launch New Carbon Nanotube Materials at nano tech 2015 January 24th, 2015

NANOPOSTER 2015 - 5th Virtual Nanotechnology Conference - call for abstracts January 24th, 2015

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

The latest fashion: Graphene edges can be tailor-made: Rice University theory shows it should be possible to tune material's properties January 24th, 2015

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

New technique helps probe performance of organic solar cell materials January 23rd, 2015

Iranian Scientists Produce Graphene-Based Oxygen Sensor January 23rd, 2015

Silver nanowires demonstrate unexpected self-healing mechanism: The material has potential for flexible electronics January 23rd, 2015

Energy

New technique helps probe performance of organic solar cell materials January 23rd, 2015

Transparent artificial nacre: A brick wall at the nanoscale January 22nd, 2015

Teijin to Participate in Nano Tech 2015 January 22nd, 2015

The path to artificial photosynthesis: HZB researchers describe efficient manganese catalyst capable of converting light to chemical energy January 21st, 2015

Solar/Photovoltaic

New technique helps probe performance of organic solar cell materials January 23rd, 2015

Teijin to Participate in Nano Tech 2015 January 22nd, 2015

The path to artificial photosynthesis: HZB researchers describe efficient manganese catalyst capable of converting light to chemical energy January 21st, 2015

Self-assembled nanotextures create antireflective surface on silicon solar cells: Nanostructured surface textures-with shapes inspired by the structure of moths' eyes-prevent the reflection of light off silicon, improving conversion of sunlight to electricity January 21st, 2015

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE