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

Two Scientists Receive Grants to Develop New Materials: Chad Mirkin and Monica Olvera de la Cruz recognized by Sherman Fairchild Foundation August 16th, 2017

2-faced 2-D material is a first at Rice: Rice University materials scientists create flat sandwich of sulfur, molybdenum and selenium August 14th, 2017

Clarifiying complex chemical processes with quantum computers August 3rd, 2017

Strem Chemicals Surpasses ChemStewards® Requirements: Strem Qualifies for SOCMA’s “Excellence” Ranking August 3rd, 2017

Govt.-Legislation/Regulation/Funding/Policy

Researchers printed graphene-like materials with inkjet August 17th, 2017

Freeze-dried foam soaks up carbon dioxide: Rice University scientists lead effort to make novel 3-D material August 16th, 2017

2-faced 2-D material is a first at Rice: Rice University materials scientists create flat sandwich of sulfur, molybdenum and selenium August 14th, 2017

Engineers pioneer platinum shell formation process – and achieve first-ever observation August 11th, 2017

Academic/Education

Two Scientists Receive Grants to Develop New Materials: Chad Mirkin and Monica Olvera de la Cruz recognized by Sherman Fairchild Foundation August 16th, 2017

Moving at the Speed of Light: University of Arizona selected for high-impact, industrial demonstration of new integrated photonic cryogenic datalink for focal plane arrays: Program is major milestone for AIM Photonics August 10th, 2017

Graduate Students from Across the Country Attend Hands-on NanoCamp: Prominent scientists Warren Oliver, Ph.D., and George Pharr, Ph.D., presented a weeklong NanoCamp for hand-picked graduate students across the United States July 26th, 2017

The Physics Department of Imperial College, London, uses the Quorum Q150T to deposit metals and ITO to make plasmonic sensors and electric contact pads July 13th, 2017

Announcements

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

Energy

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Freeze-dried foam soaks up carbon dioxide: Rice University scientists lead effort to make novel 3-D material August 16th, 2017

Two Scientists Receive Grants to Develop New Materials: Chad Mirkin and Monica Olvera de la Cruz recognized by Sherman Fairchild Foundation August 16th, 2017

Fewer defects from a 2-D approach August 15th, 2017

Industrial

Researchers printed graphene-like materials with inkjet August 17th, 2017

Nanocrystalline LEDs: Red, green, yellow, blue ... August 7th, 2017

Magnetized viruses attack harmful bacteria: Rice, China team uses phage-enhanced nanoparticles to kill bacteria that foul water treatment systems August 2nd, 2017

3-D-printed jars in ball-milling experiments June 29th, 2017

Alliances/Trade associations/Partnerships/Distributorships

Oxford Instruments Plasma Technology announces a new partner in Korea August 15th, 2017

Moving at the Speed of Light: University of Arizona selected for high-impact, industrial demonstration of new integrated photonic cryogenic datalink for focal plane arrays: Program is major milestone for AIM Photonics August 10th, 2017

Technology Companies Join Forces for TEM Imaging and Analysis August 3rd, 2017

GLOBALFOUNDRIES and VeriSilicon To Enable Single-Chip Solution for Next-Gen IoT Networks: Integrated solution leverages GF’s 22FDX® technology to decrease power, area, and cost for NB-IoT and LTE-M applications July 14th, 2017

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