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:7/11/2014)... , July 11, 2014 /CNW/ - Sunovion Pharmaceuticals ... APTIOM TM (eslicarbazepine acetate) for use as a ... in patients with epilepsy who are not satisfactorily controlled ... for use in patients under 18 years of age. ... common neurological disorders and according to Epilepsy Canada, it ...
(Date:7/10/2014)... July 10, 2014 Deep Knowledge ... Medicine Forum on ‘Commercialising Longevity Research’ and welcomed ... to the London Bioscience Innovation Center for the ... and Aging Analytics Ltd. The meeting highlighted the ... translational research for age-related disease, as well as ...
(Date:7/10/2014)... 2014 OMICS Group’s 5th International conference ... August, 2014 at Double Tree by Hilton Beijing, China ... in Analytical & Bioanalytical research methods only to facilitate ... this occasion, Dr. Srinubabu Gedela, MD of OMICS Group ... a remarkable one in bringing a unique and international ...
(Date:7/10/2014)... , July 10, 2014  Kainos Capital, a firm ... today announced that it has acquired the Slim-Fast brand ... the business. Terms of the transaction were not disclosed. ... meal replacement business that markets ready-to-drink shakes, powders, bars ... America and in the United ...
Breaking Biology Technology:Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 2Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 3Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 2DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 5DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 6A Critical Review of Analytical Techniques for Improved Living Standards 2A Critical Review of Analytical Techniques for Improved Living Standards 3A Critical Review of Analytical Techniques for Improved Living Standards 4Kainos Capital Acquires Slim-Fast From Unilever 2
... Aug. 24, 2011 United Therapeutics Corporation (NASDAQ: ... of its FREEDOM-C(2) Phase 3 trial of treprostinil ... formulation of treprostinil, a stable synthetic form of ...  Preliminary analysis demonstrates that the trial did not ...
... Lake, N.Y. New research from the Trudeau Institute ... (LAIV), commonly known as FluMist, elicits protection. The ... Vaccine . The journal article is entitled "Live attenuated ... and was authored by Trudeau Institute scientist Dr. Laura ...
... Mich.---A delicate balance of atomic forces can be exploited ... attribute that,s important for many nanotech applications but hard ... The same type of forces are at work bringing ... supercluster structures in this research are in many ways ...
Cached Biology Technology:FREEDOM-C(2) Trial of Oral Treprostinil in Pulmonary Arterial Hypertension Does Not Meet Primary Endpoint 2FREEDOM-C(2) Trial of Oral Treprostinil in Pulmonary Arterial Hypertension Does Not Meet Primary Endpoint 3FREEDOM-C(2) Trial of Oral Treprostinil in Pulmonary Arterial Hypertension Does Not Meet Primary Endpoint 4Trudeau Institute announces a discovery in how FluMist elicits protection 2Engineers discover nanoscale balancing act that mirrors forces at work in living systems 2
(Date:7/11/2014)... researchers, including scientists from the Max Planck Institute for ... major step in understanding photosynthesis, the process by which ... in its atmosphere and which is therefore crucial for ... The researchers report the first direct visualization of a ... in which a specific protein complex, photosystem II, splits ...
(Date:7/11/2014)... hippocampus, the marginal division of the striatum is ... the impact degree of substance P in the ... Yan Yu and his team, College of Biophotonics, ... staining, that substance P receptor, neurokinin 1 was ... division of normal rats. Unilateral or bilateral injection ...
(Date:7/11/2014)... de Janeiro, Brazil- In the brains of all ... that allows an electric or chemical signal to ... Chemical synapses, which are the most abundant type ... Synapse formation is crucial for learning, memory, perception ... inhibitory synapses critical for brain function. For ...
Breaking Biology News(10 mins):A first direct glimpse of photosynthesis in action 2Blame it on the astrocytes 2
... New Geosphere postings cover using traditional geochemistry ... Volcanic Belt; an investigation of mafic rock samples from ... the southeastern Colorado Plateau of New Mexico and Arizona; ... field and micro-analytical techniques; and an addition to the ...
... from Australia are more positive than negative now with regards ... a "long way to go." Considerable progress has been ... heat that continues to generate smoke from the open mine. ... 11, but there are still "weeks of firefighting ahead" according ...
... the list of the chicken,s most lasting legacies may ... optics that can transmit light with the efficiency of ... The unusual arrangement of cells in a chicken,s eye ... new state of matter known as "disordered hyperuniformity," according ...
Cached Biology News:Geosphere covers Mexico, the Colorado Plateau, Russia, and offshore New Jersey 2Geosphere covers Mexico, the Colorado Plateau, Russia, and offshore New Jersey 3Geosphere covers Mexico, the Colorado Plateau, Russia, and offshore New Jersey 4Geosphere covers Mexico, the Colorado Plateau, Russia, and offshore New Jersey 5Geosphere covers Mexico, the Colorado Plateau, Russia, and offshore New Jersey 6In the eye of a chicken, a new state of matter comes into view 2In the eye of a chicken, a new state of matter comes into view 3In the eye of a chicken, a new state of matter comes into view 4In the eye of a chicken, a new state of matter comes into view 5
Human Norrin Biotinylated Affinity Purified PAb Protein Family: Other Growth Factors, Other Wnt-related Molecules...
...
Recombinant Mouse Matrilin-4, CF Protein Family: Extracellular Matrix Molecules, Chondrogenesis Markers...
Request Info...
Biology Products: