Home > Press > Graphene and friends: A new method to make 2D materials
 |
| http://dx.doi.org/10.1002/anie.201106004|Z. Zeng, Angew. Chem. Int. Ed. ; DOI: 10.1002/anie.201106004 |
Abstract:
by Adrian Miller
Although graphene has had materials researcher hearts racing more or less since its discovery, many scientists see it as just the beginning - if other materials could be processed in the same way, they ask, couldn't it mean a revolution in nanodevice design? Imagine a range of two-dimensional materials, each with their own unique thermal, electronic, optical, and mechanical properties, used for a whole host of nanotechnology applications.
Graphene and friends: A new method to make 2D materials
Germany | Posted on November 10th, 2011
The problem with this vision - at least, up until now - is that graphene is the only 2D material that can be reliably and easily synthesized in large enough quantities to be useful for device manufacture. Other compounds, for example MoS2 and WS2, are right up there with graphite in terms of potential, but the groups working on their processing haven't been able to move past small scale methods such as mechanical cleavage (á la Geim and Novoselov) and nanotube "unzipping".
However, that might be about to change - last week, a Singaporean team reported a new process to create large numbers of single-layer nanosheets quickly and efficiently, applicable to any suitable bulk material. By inducing lithiation with an electrochemical setup, the materials can be carefully monitored and put into a state ideal for ultrasonication and exfoliation. In less than six hours, and at room temperatures, their test setup obtained an MoS2 nanosheet yield of 92%.
To demonstrate how useful these sheets could be, the team went on to create a proof-of-concept nitric oxide detector from these single MoS2 layers. As they're electrically conductive over large areas, and act as p-type semiconductors, they respond electronically to different NO concentrations, and the addition of gold electrodes meant that the response could measured. This experimental device showed great promise - a detection limit of 190 ppt, definitely well within the limits for a promising sensing platform.
Other, similar, experiments yielded similar results with WS2, TiS2, and others - even graphene! - and the researchers see their method as one that could be adopted to produce a range of 2D nanosheets, for application in areas such as electronics, catalysis, and sensing.
####
For more information, please click here
Copyright © Wiley-VCH Materials Science Journals
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:
News and information
Aspen Aerogels Announces $22.5 Million Private Placement May 18th, 2013
NanoInk, Inc. Assets To Be Sold May 18th, 2013
Beautiful "flowers" self-assemble in a beaker: Elaborate nanostructures blossom from a chemical reaction perfected at Harvard May 17th, 2013
Scientists capture first direct proof of Hofstadter butterfly effect May 17th, 2013
Graphene
Add boron for better batteries: Rice University theorists say graphene-boron mix shows promise for lithium-ion batteries May 17th, 2013
Seville will host the 14th Trends in Nanotechnology International Conference (TNT 2013): Call for abstracts announced May 14th, 2013
Agilent Technologies New AFM/Raman Spectroscopy System Provides Nanoscale Material Identification and Analysis May 13th, 2013
Graphene joins the race to redefine the ampere May 12th, 2013
Chemistry
Iranian Scientists Use Pomegranate Juice to Produce Copper Iodide Nanostructure May 14th, 2013
Chemistry breakthrough sheds new light on illness and health May 12th, 2013
Chip Technology
UC Riverside scientists discovering new uses for tiny carbon nanotubes: Adding ionic liquid to nanotube films could build smaller gadgets, and create more cost effective 'Smart Windows' that darken in bright sun May 15th, 2013
Nanometrics Announces Upcoming Investor Events May 14th, 2013
HELIOS Program Develops Complete Supply Chain for Integrating Photonics with CMOS Circuit via IC Fabrication Processes May 14th, 2013
Silex Microsystems Joins ENIAC Project PROMINENT To Bring Flexible and Cost Effective Inkjet Technologies to the MEMS Manufacturing Process: Silex Will Develop New Solutions for Through-Silicon Via Manufacture and Hermetic Wafer Bonding May 13th, 2013
Sensors
Advancements and developments of solid-state nanopores sensors May 16th, 2013
Imec and Renesas collaborate on ultra-low power short range radios: Collaboration will develop robust wireless solutions for future electronics May 16th, 2013
Physicists discover a new kind of friction: Friction in the nano-world May 16th, 2013
HELIOS Program Develops Complete Supply Chain for Integrating Photonics with CMOS Circuit via IC Fabrication Processes May 14th, 2013
Discoveries
Beautiful "flowers" self-assemble in a beaker: Elaborate nanostructures blossom from a chemical reaction perfected at Harvard May 17th, 2013
Artificial Forest for Solar Water-Splitting: Berkeley Lab Researchers Report First Fully Integrated Artificial Photosynthesis Nanosystem May 17th, 2013
Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013
Scientists capture first direct proof of Hofstadter butterfly effect May 17th, 2013
Announcements
Aspen Aerogels Announces $22.5 Million Private Placement May 18th, 2013
NanoInk, Inc. Assets To Be Sold May 18th, 2013
NIA Public Briefing: Nanotechnology and the Council of Europe May 17th, 2013
Scientists capture first direct proof of Hofstadter butterfly effect May 17th, 2013