Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > VCU Research Highlighted in Science Journal

Seven atom arsenic clusters are assembled into different architectures by using different counterions. By changing the counterion, the band gap of the material is changed despite being made from the same building block. Covalent linkers, as shown by gold linked assembly in the central panel allows additional control of the band gap. The arsenic atoms are red, the gold linkers are gold, and the counterions are purple for cesium and blue for potassium. Image courtesy of VCU/PSU/California Nanosystems Institute.
Seven atom arsenic clusters are assembled into different architectures by using different counterions. By changing the counterion, the band gap of the material is changed despite being made from the same building block. Covalent linkers, as shown by gold linked assembly in the central panel allows additional control of the band gap. The arsenic atoms are red, the gold linkers are gold, and the counterions are purple for cesium and blue for potassium. Image courtesy of VCU/PSU/California Nanosystems Institute.

Abstract:
Designing nanoscale materials with a precise control over properties

By Sathya Achia Abraham

VCU Research Highlighted in Science Journal

Richmond, VA | Posted on March 5th, 2010

Shiv Khanna, Ph.D., a professor in the VCU Department of Physics, together with colleagues from VCU, Penn State University and the California Nanosystems Institute, were recently highlighted in the Editor's Choice section of the journal Science for their work demonstrating how nanomaterials with control of specific properties can be created.

For the past decade, nanoscience has been a major scientific focus area globally, paving the way for the development of new materials for applications in the fields of energy, medicine, electronics, magnetics and chemistry.

Through theoretical and experimental work, the team found a way to make materials with variable band gaps. The band gap determines the nature of radiation that a material can absorb.

According to Khanna, using As73- as an atomic cluster of choice, the team synthesized nanoscale materials that combine As73- clusters with various alkali atoms that donate the charge to As7 clusters and consequently, result in different materials. Experimental measurements revealed that the band gaps vary from 1.1-2.1 eV, even though the assemblies are constructed from identical cluster building blocks.

The theoretical work at VCU revealed the nature of the electronic character of As73- clusters and further led to the understanding of how these variations are coming about.

"To our knowledge, this is the clearest demonstration of the potential of making materials with adjustable characteristics," said Khanna.

"Our research will open the pathway to materials with applications in energy needs, electronics and magnetic industries. We are also developing ideas for new catalysts that catalyze reactions and also perform other functions," Khanna said.

These findings were published in the January 2010 issue of the journal ACS-Nano - a publication of the American Chemical Society.

The work was supported by the Army Research Office through a MURI grant.

Khanna collaborated with VCU researchers Arthur C. Reber and Meichun Qian; Ayusman Sen, Ph.D., professor of chemistry at Penn State, and Penn State research associates Angel Ugrino, N.K. Chaki, and S. Mandal; and P. Weiss, Ph.D., director of the California Nanosytems Institute, and distinguished professor of chemistry and physics at Penn State, and H. M. Saavedra, a research associate at Penn State.

####

About Virginia Commonwealth University
Virginia Commonwealth University is a public, metropolitan, research university, supported by Virginia to serve the people of the state and the nation. The university provides a fertile and stimulating environment for learning, teaching, research, creative expression and public service. Essential to the life of the university is the faculty — actively engaged in scholarship and creative exploration activities that increase knowledge and understanding of the world and inspire and enrich teaching.

For more information, please click here

Contacts:
Sathya Achia Abraham
VCU Communications and Public Relations
(804) 827-0890

Copyright © Virginia Commonwealth University

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 News Press

Chemistry

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Scientists shrink electron gun to matchbox size: Terahertz technology has the potential to enable new applications November 25th, 2016

Tip-assisted chemistry enables chemical reactions at femtoliter scale November 16th, 2016

New Book by Nobel Laureate Tells Story of Chemistry’s New Field: Fraser Stoddart explains the mechanical bond and where it is taking scientists November 11th, 2016

Govt.-Legislation/Regulation/Funding/Policy

Research Study: MetaSOLTM Shatters Solar Panel Efficiency Forecasts with Innovative New Coating: Coating Provides 1.2 Percent Absolute Enhancement to Triple Junction Solar Cells December 2nd, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Quantum obstacle course changes material from superconductor to insulator December 1st, 2016

Throwing new light on printed organic solar cells December 1st, 2016

Academic/Education

Oxford Nanoimaging report on how the Nanoimager, a desktop microscope delivering single molecule, super-resolution performance, is being applied at the MRC Centre for Molecular Bacteriology & Infection November 22nd, 2016

The University of Applied Sciences in Upper Austria uses Deben tensile stages as an integral part of their computed tomography research and testing facility October 18th, 2016

Enterprise In Space Partners with Sketchfab and 3D Hubs for NewSpace Education October 13th, 2016

New Agricultural Research Center Debuts at UCF October 12th, 2016

Announcements

Research Study: MetaSOLTM Shatters Solar Panel Efficiency Forecasts with Innovative New Coating: Coating Provides 1.2 Percent Absolute Enhancement to Triple Junction Solar Cells December 2nd, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Quantum obstacle course changes material from superconductor to insulator December 1st, 2016

Throwing new light on printed organic solar cells December 1st, 2016

Energy

Research Study: MetaSOLTM Shatters Solar Panel Efficiency Forecasts with Innovative New Coating: Coating Provides 1.2 Percent Absolute Enhancement to Triple Junction Solar Cells December 2nd, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Throwing new light on printed organic solar cells December 1st, 2016

Physics, photosynthesis and solar cells: Researchers combine quantum physics and photosynthesis to make discovery that could lead to highly efficient, green solar cells November 30th, 2016

Industrial

Supersonic spray yields new nanomaterial for bendable, wearable electronics: Film of self-fused nanowires clear as glass, conducts like metal November 23rd, 2016

Industrial Nanotech, Inc. Announces Plans to Spin Off New Product Line to Major Paint Compan November 9th, 2016

Forge Nano raises $20 million in Series A Funding: Nano coating technology innovator Forge Nano will use funding to expand manufacturing capacity and grow Lithium-Ion battery opportunities November 3rd, 2016

SUN shares its latest achievements during the 3rd Annual Project Meeting November 1st, 2016

Alliances/Trade associations/Partnerships/Distributorships

Leti and Grenoble Partners Demonstrate World’s 1st Qubit Device Fabricated in CMOS Process: Paper by Leti, Inac and University of Grenoble Alpes Published in Nature Communications November 28th, 2016

Mechanism for sodium storage in 2-D material: Tin selenide is an effective host for storing sodium ions, making it a promising material for sodium ion batteries October 27th, 2016

Enterprise In Space Partners with Sketchfab and 3D Hubs for NewSpace Education October 13th, 2016

Arrowhead and Spring Bank Announce Clinical Collaboration for ARC-520 and SB 9200 in Chronic Hepatitis B October 6th, 2016

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