Navigation Links
24-carat gold 'snowflakes' improve graphene's electrical properties
Date:10/13/2009

In an effort to make graphene more useful in electronics applications, Kansas State University engineers made a golden discovery -- gold "snowflakes" on graphene.

Vikas Berry is a K-State assistant professor of chemical engineering who works with graphene, a carbon material only a single atom thick and discovered just five years ago. To functionalize graphene with gold -- thus controlling its electronics properties -- Berry and Kabeer Jasuja, a K-State doctoral student in chemical engineering, imbedded gold on graphene.

To do this, the engineers placed the graphene oxide sheets in a gold ion solution that had a growth catalyst. Here, the atomically thick sheets swim and bathe in a pool of chemicals.

"Graphene-derivatives act like swimming molecular carpets when in solution and exhibit fascinating physiochemical behavior," Berry said. "If we change the surface functionality or the concentration, we can control their properties."

They found that rather than distributing itself evenly over graphene, the gold formed islands on the sheets' surfaces. They named these islands snowflake-shaped gold nanostars, or SFGNs.

"So we started exploring how these gold nanostars are formed," Berry said. "We found out that nanostars with no surface functionality are rather challenging to produce by other chemical processes. We can control the size of these nanostars and have characterized the mechanism of nucleation and growth of these nanostructures. It's similar to the mechanism that forms real snowflakes."

Berry said the presence of graphene is critical for the formation of the gold nanostars. "If graphene is absent, the gold would clump together and settle down as big chunks," he said. "But the graphene helps in stabilizing the gold. This makes the nanostars more useful for electronic applications."

In July, Jasuja and Berry published their work in the journal ACS-Nano.

The discovery of these gold
'/>"/>

Contact: Vikas Berry
vberry@k-state.edu
785-532-5519
Kansas State University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. LSU professors work to improve efficiency of ethanol fuel
2. Geron Demonstrates hESC-derived cardiomyocytes improve heart function after myocardial infarction
3. Drug could improve pregnancy outcomes in wider range of women with insulin resistance
4. Improved e-jet printing provides higher resolution and more versatility
5. MIT model could improve some drugs effectiveness
6. NIH awards UC $9 million grant to improve patient point-of-care technologies
7. In-vitro fertilization improved with 3-D/4-D-guided embryo transfer and new placement target
8. Stronger EPA leadership needed to improve water quality in Mississippi River
9. Exercise improves thinking, reduces diabetes risk in overweight children
10. Endobronchial valve significantly improves emphysema
11. Teamwork improves learning and career success
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
24-carat gold 'snowflakes' improve graphene's electrical properties
(Date:7/21/2014)... In traditional apple orchards, effective management practices ... to manage competitive vegetation under the trees, ... These factors are further complicated in organic ... and producers need to meet the stringent ... of the National Organic Program. University of ...
(Date:7/21/2014)... scientist has developed a pioneering new way using ... the effect of drugs on the heart without using ... work of Dr Helen Maddock an expert in ... Applied Biological and Exercise Sciences and could lead ... saved and the quality of their treatments improved. , ...
(Date:7/21/2014)... , July 21, 2014 Research and ... of the "Next Generation Biometric Market by ... & Analysis 2014 - 2020" report to ... Biometric technology is the verification of humans by ... palm, signature, vein, and DNA. DNA and vein ...
Breaking Biology News(10 mins):Organic apple orchards benefit from green compost applications 2New technique uses 'simulated' human heart to screen drugs 2Global Next Generation Biometric Market by Technology, Function, Application & by Geography - Forecasts & Analysis to 2020 2Global Next Generation Biometric Market by Technology, Function, Application & by Geography - Forecasts & Analysis to 2020 3
... PHILADELPHIA A study published in the December issue ... the American Association for Cancer Research, suggests that selenium, ... may aid in the prevention of high-risk bladder cancer. ... levels in 767 individuals newly diagnosed with bladder cancer ...
... Rods and cones coexist peacefully in healthy retinas. Both types ... signals when they detect light, which is the first step ... a codependent relationship between the two that can be destructive. ... them to the grave, leading to blindness. A new study ...
... examines genetic variants associated with nine metabolic traits and ... a population unselected for current disease. The traits are ... 2 diabetes, blood pressure, inflammation and lipid levels. ... about their health: these data will help researchers to ...
Cached Biology News:Selenium may prevent high risk-bladder cancer 2Progression of retinal disease linked to cell starvation 2Genes for 9 health indicators 2Genes for 9 health indicators 3
(Date:7/21/2014)... California (PRWEB) July 21, 2014 ... County Workforce Investment Board (WIB) and Las Positas ... to provide technical education and hands-on training for ... Engineering Technology Program at Las Positas is ... training needed for engineering technician careers, and establishes ...
(Date:7/21/2014)... College of Arts and Sciences has received a ... nanoparticles. , Mathew M. Maye, associate professor of ... from the National Science Foundation (NSF). The award ... nanostructures, the results of which may impact gas ... , Maye,s approach is novel, in that ...
(Date:7/21/2014)... , July 21, 2014 ... Global & USA Cancer ... and Forecasts ResearchMoz presents this most ... Market   to 2018 (Identification, Technologies, Market Analysis, Competitor ... and Pipeline Analysis. GLOBAL & ...
(Date:7/20/2014)... NSG Precision Cells has been ... spectrophotometer calibration standards for over 50 ... many products that have transformed the spectroscopy world. ... solid-state calibration standards. , NSG’s solid-state calibration standards ... in 2008. NSG started manufacturing UV and ...
Breaking Biology Technology:Engineering Program Established for Veterans 2Engineering Program Established for Veterans 3Syracuse University chemist to use NSF grant to study materials chemistry, nanoscience 2Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 2Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 3Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 4Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 5Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 6How NSG Precision Cells Spectrophotometer Calibration Standards Makes NIR Work Easier 2How NSG Precision Cells Spectrophotometer Calibration Standards Makes NIR Work Easier 3
... Webcast and Conference Call Scheduled for Tuesday, May 13th at ... Therapeutics, Inc.,(Nasdaq: IMRX ) today announced that the Company ... 13, 2008, at 5:00 p.m. ET to discuss,first quarter 2008 ... ImaRx,s corporate website at, http://www.imarx.com and will be archived ...
... DIEGO, May 7 Arena Pharmaceuticals, Inc.,(Nasdaq: ARNA ... ended,March 31, 2008., Total revenues in the first ... in the first quarter of 2007, and included $2.0 ... Ltd,and $0.6 million in patent reimbursements from Arena,s collaborations ...
... augment Quintiles Consulting offerings, RESEARCH TRIANGLE ... today announced that it has signed an ... and market research,consulting firm located in Boston ... The acquisition of Eidetics will strengthen ...
Cached Biology Technology:Arena Pharmaceuticals Announces First Quarter 2008 Financial Results 2Arena Pharmaceuticals Announces First Quarter 2008 Financial Results 3Arena Pharmaceuticals Announces First Quarter 2008 Financial Results 4Arena Pharmaceuticals Announces First Quarter 2008 Financial Results 5Arena Pharmaceuticals Announces First Quarter 2008 Financial Results 6Arena Pharmaceuticals Announces First Quarter 2008 Financial Results 7Arena Pharmaceuticals Announces First Quarter 2008 Financial Results 8Quintiles Signs Agreement to Acquire Eidetics 2
... Ion Chromatography requirements, IonQuest will ... The newly developed conductivity detector ... exceptionally ultra-low drift . The ... creates even higher sensitivities for ...
... fast and easy method for the ... from mammalian tissues. Most of the ... outer membranes. The kit contains extraction ... proteome profiling. Also included is a ...
... 2500ml narrow mouth PYREX low form culture flask is ... to volume ratio. This flask has a heavy beaded ... marking spot. The neck O.D. is 38mm and takes ... use this flask on a heat source smaller than ...
... DNA transformation can be difficult to achieve ... presence of one or more restriction and ... that is recognized as "foreign". TypeOne™ Restriction ... transformation efficiencies in bacterial strains with type ...
Biology Products: