Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

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

Production of Toxic Ion Nanosorbents with High Sorption Capacity in Iran August 17th, 2014

Scientists fold RNA origami from a single strand: RNA origami is a new method for organizing molecules on the nanoscale. Using just a single strand of RNA, this technique can produce many complicated shapes. August 14th, 2014

Could hemp nanosheets topple graphene for making the ideal supercapacitor? August 12th, 2014

Iranians Find Novel Method for Processing Highly Pure Ceramic Nanoparticles August 12th, 2014

Govt.-Legislation/Regulation/Funding/Policy

New analytical technology reveals 'nanomechanical' surface traits August 29th, 2014

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

Leading European communications companies and research organizations have launched an EU project developing the future 5th Generation cellular mobile networks August 28th, 2014

New technique uses fraction of measurements to efficiently find quantum wave functions August 28th, 2014

Academic/Education

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

RMIT delivers $30m boost to micro and nano-tech August 26th, 2014

SEMATECH and Newly Merged SUNY CNSE/SUNYIT Launch New Patterning Center to Further Advance Materials Development: Center to Provide Access to Critical Tools that Support Semiconductor Technology Node Development August 7th, 2014

Oxford Instruments Asylum Research and the Center for Nanoscale Systems at Harvard University Present a Workshop on AFM Nanomechanical and Nanoelectrical Characterization, Aug. 21-22 August 6th, 2014

Announcements

A new, tunable device for spintronics: An international team of scientists including physicist Jairo Sinova from the University of Mainz realises a tunable spin-charge converter made of GaAs August 29th, 2014

Nanoscale assembly line August 29th, 2014

New analytical technology reveals 'nanomechanical' surface traits August 29th, 2014

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

Energy

Novel 'butterfly' molecule could build new sensors, photoenergy conversion devices August 28th, 2014

Aspen Aerogels, Inc. to Present at Barclays CEO Energy-Power Conference August 27th, 2014

Competition for Graphene: Berkeley Lab Researchers Demonstrate Ultrafast Charge Transfer in New Family of 2D Semiconductors August 26th, 2014

Chemical reaction yields "tapes" of porphin molecules: Flexible tapes from the nanoworld August 13th, 2014

Industrial

Nanoscale assembly line August 29th, 2014

Iranians Find Novel Method for Processing Highly Pure Ceramic Nanoparticles August 12th, 2014

PerkinElmer to Display Innovative Detection and Informatics Offerings at ACS National Meeting & Exposition Detection, Data Visualization and Analytics for Chemistry Professionals August 8th, 2014

Nanostructured metal-oxide catalyst efficiently converts CO2 to methanol: Highly reactive sites at interface of 2 nanoscale components could help overcome hurdle of using CO2 as a starting point in producing useful products July 31st, 2014

Alliances/Partnerships/Distributorships

Leading European communications companies and research organizations have launched an EU project developing the future 5th Generation cellular mobile networks August 28th, 2014

JPK expands availability of instrumentation in the USA – appointing new distributors – launched a new web site to support the US market - AFM now available to US users August 26th, 2014

Sunblock poses potential hazard to sea life August 20th, 2014

SouthWest NanoTechnologies Appoints Matteson-Ridolfi for U.S. Distribution of its SMW™ Specialty Multiwall Carbon Nanotubes August 13th, 2014

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 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE