Navigation Links
Graphene quantum dots: The next big small thing
Date:1/12/2012

A Rice University laboratory has found a way to turn common carbon fiber into graphene quantum dots, tiny specks of matter with properties expected to prove useful in electronic, optical and biomedical applications.

The Rice lab of materials scientist Pulickel Ajayan, in collaboration with colleagues in China, India, Japan and the Texas Medical Center, discovered a one-step chemical process that is markedly simpler than established techniques for making graphene quantum dots. The results were published online this month in the American Chemical Society's journal Nano Letters.

"There have been several attempts to make graphene-based quantum dots with specific electronic and luminescent properties using chemical breakdown or e-beam lithography of graphene layers," said Ajayan, Rice's Benjamin M. and Mary Greenwood Anderson Professor of Mechanical Engineering and Materials Science and of Chemistry. "We thought that as these nanodomains of graphitized carbons already exist in carbon fibers, which are cheap and plenty, why not use them as the precursor?"

Quantum dots, discovered in the 1980s, are semiconductors that contain a size- and shape-dependent band gap. These have been promising structures for applications that range from computers, LEDs, solar cells and lasers to medical imaging devices. The sub-5 nanometer carbon-based quantum dots produced in bulk through the wet chemical process discovered at Rice are highly soluble, and their size can be controlled via the temperature at which they're created.

The Rice researchers were attempting another experiment when they came across the technique. "We tried to selectively oxidize carbon fiber, and we found that was really hard," said Wei Gao, a Rice graduate student who worked on the project with lead author Juan Peng, a visiting student from Nanjing University who studied in Ajayan's lab last year. "We ended up with a solution and decided to look at a few drops with a t
'/>"/>

Contact: David Ruth
david@rice.edu
713-348-6327
Rice University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Graphene pioneers follow in Nobel footsteps
2. New graphene-based material clarifies graphite oxide chemistry
3. Researchers discover method for mass production of nanomaterial graphene
4. Light-speed nanotech: Controlling the nature of graphene
5. Scientists prove graphenes edge structure affects electronic properties
6. Graphene yields secrets to its extraordinary properties
7. Graphene may have advantages over copper for IC interconnects at the nanoscale
8. Bilayer graphene gets a bandgap
9. Material world: Graphenes versatility promises new applications
10. UCR scientists manipulate ripples in graphene, enabling strain-based graphene electronics
11. Researchers design new graphene-based, nano-material with magnetic properties
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/30/2014)... , Oct. 30, 2014 Isis Pharmaceuticals, Inc. (NASDAQ: ... announced that management will present a company overview at the ... a.m. ET in Boston, MA. ... on the "Investors & Media" section of the Company,s website, ... Isis website within 48 hours and will be archived for ...
(Date:10/30/2014)... 30, 2014  Regado Biosciences, Inc. (Nasdaq: ... conference call and live audio webcast on Thursday, November ... third quarter 2014 financial results. Interested participants ... (888) 347-1165 for domestic callers or (412) 902-4276 for ... under the investor relations section of the Regado website ...
(Date:10/30/2014)... DENVER (Oct. 29, 2014) – The severe flooding that ... have been less destructive if the bridges, roads and ... a new study from the University of Colorado Denver. ... of infrastructure," said Jimmy Kim, PhD, associate professor of ... and Applied Science and lead author the study. "There ...
(Date:10/27/2014)... 2014 The new research report, ... & Medium), Sub-type (Primary & Secondary), and End-User ... Transportation & Power Generation) - Trends and Forecasts ... with analysis and forecasting of the market size. ... with 52 Figures spread through 146 Pages and ...
Breaking Biology Technology:Isis Pharmaceuticals to Present at the Nomura Biotechnology Conference 2Regado Biosciences to Provide Third Quarter 2014 Financial Results 2CU Denver study says upgrading infrastructure could reduce flood damage 2Gas Insulated Switchgear Market worth $21,951.9 Million by 2019 - New Report by MarketsandMarkets 2Gas Insulated Switchgear Market worth $21,951.9 Million by 2019 - New Report by MarketsandMarkets 3Gas Insulated Switchgear Market worth $21,951.9 Million by 2019 - New Report by MarketsandMarkets 4
... HILL, N.C., Jan. 12, 2011 Cempra Pharmaceuticals ... of solithromycin (CEM-101), the first fluoroketolide antibiotic, at ... Advanced Research and Development Authority (BARDA) industry day ...   Solithromycin is a clinical-stage fluoroketolide ...
... Jan. 11, 2011 Fred Hutchinson Cancer Research Center ... Robert Eisenman, Ph.D., a molecular biologist and geneticist, have ... Advancement of Science, or AAAS. Election as a fellow ... peers. Brent, a member of the Hutchinson ...
... 2011 Regenicin, Inc. (OTC Bulletin Board: ... of regenerative cell therapies to restore the health of ... annual OneMedForum at the Sir Francis Drake Hotel in ... McCoy, will present Regenicin,s core business model and strategic ...
Cached Biology Technology:Cempra Pharmaceuticals Profiles the Broad Spectrum and Potent Activity Profile of Solithromycin (CEM-101) at the 5th Annual PHEMCE Stakeholders Workshop and BARDA Industry Day 2Cempra Pharmaceuticals Profiles the Broad Spectrum and Potent Activity Profile of Solithromycin (CEM-101) at the 5th Annual PHEMCE Stakeholders Workshop and BARDA Industry Day 3Roger Brent and Robert Eisenman Named AAAS Fellows 2Roger Brent and Robert Eisenman Named AAAS Fellows 3Regenicin CEO to Participate in Live Webcast at OneMedForum Business Development and Finance Conference, January 11th at 4:00 PM PST 2
(Date:10/29/2014)... . Meiosis ... at the Max F. Perutz Laboratories (MFPL) of the ... dived into the process of meiosis in specific plant ... of the standard meiotic phases. The researchers describe the ... . , Meiosis is the two-step series of cell ...
(Date:10/29/2014)... of the Barcode of Life Data Systems ... Biodiversity Data Journal (BDJ) used specimen records ... into a human-readable text developed in manuscript within the ... to study the species distributions of ten Nearctic species ... is originally designed to support the generation and application ...
(Date:10/29/2014)... organisms in the living world compete with members ... in how much they invest into their competitive ... to get access to high-quality resources, while others ... of the lower-quality resources that are left over ... animal and human societies seems to fluctuate considerably ...
Breaking Biology News(10 mins):Meiotic cell division 'the other way round' 2Go straight and publish: From Barcode of Life Data Systems to scholarly publishing systems 2Evolution of competitiveness 2Evolution of competitiveness 3
... Many plants produce toxic chemicals to protect themselves ... flower structures that prevent pollinators such as bees from ... evidence that flowering plants might also use chemical defences ... are published next week in the British Ecological Society,s ...
... MA - It is estimated that up to 10 ... of renal disease, with 450,000 patients with end stage ... Women,s Hospital, Massachusetts General Hospital and the University of ... be transplanted from one fish to another to regenerate ...
... students to ultimately provide quality patient care medical schools should ... the core disciplines of medicine, according to a study in ... College of Radiology ( www.jacr.org ). Physiology is the ... is vital that medical schools provide first-rate physiology education for ...
Cached Biology News:Secret life of bees now a little less secret 2Researchers unlock the potential for exploring kidney regeneration 2