Navigation Links
Argonne researcher studies what makes quantum dots blink
Date:10/5/2007

In order to learn more about the origins of quantum dot blinking, researchers from the U.S. Department of Energy's Argonne National Laboratory, the University of Chicago and the California Institute of Technology have developed a method to characterize it on faster time scales than have previously been accessed.

Nanocrystals of semiconductor material, also known as quantum dots, are being intensively investigated for applications such as light-emitting diodes, solid-state lighting, lasers, and solar cells. They are also already being applied as fluorescent labels for biological imaging, providing several advantages over the molecular dyes typically used, including a wider range of emitted colors and much greater stability.

Quantum dots have great promise as light-emitting materials, because the wavelength, or color, of light that the quantum dots give off can be very widely tuned simply by changing the size of the nanoparticles. If a single dot is observed under a microscope, it can be seen to randomly switch between bright and dark states. This flickering, or blinking, behavior has been widely studied, and it has been found that a single dot can blink off for times that can vary between microseconds and several minutes. The causes of the blinking, though, remain the subject of intense study.

The methods developed by Matt Pelton of Argonne's Center for Nanoscale Materials and his team of collaborators has revealed a previously unobserved change in the blinking behavior on time scales less than a few microseconds. This observation is consistent with the predictions of a model for quantum-dot blinking previously developed by Nobel Laureate Rudolph Marcus, contributor to this research, and his co-workers. In this model, the blinking is controlled by the random fluctuation of energy levels in the quantum dot relative to the energies of trap states on the surface of the nanocrystal or in the nearby environment.

The results of
'/>"/>

Contact: Sylvia Carson
scarson@anl.gov
630-252-5510
DOE/Argonne National Laboratory
Source:Eurekalert

Page: 1 2

Related biology technology :

1. NimbleGen researcher to lead $415K DNA project
2. Tapping hidden assets: Wisconsin researchers who can create jobs
3. Genomics researcher Hood joins NimbleGen board
4. Researcher wants to commercialize adult stem cell discovery
5. National Academies induct five UW researchers
6. Wisconsin researchers defend stem cell company
7. Departure of nanotech researcher stings UW
8. Medical College researcher working to make genetic-based medicine a reality
9. NimbleGen partners with leading researchers
10. Medical College researchers win federal grants
11. Researchers say scientific reporting needs more perspective, less hype
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/2/2015)... Sept. 2, 2015 Axovant Sciences Ltd. (NYSE:  AXON), ... dementia, today announced upcoming presentations at three investor conferences: ... Baird 2015 Healthcare Conference in New York ... September 10 at 2:00 PM at the BioCentury NewsMakers Conference ... Broadway Hotel & Conference Center , Thursday, September 17 ...
(Date:9/2/2015)... Sept. 2, 2015 Research and ... addition of Jain PharmaBiotech,s new report ... their offering. An increasing ... biotechnology industries is anticipated. Nanotechnology will be ... - from formulations for optimal delivery to ...
(Date:9/2/2015)... ANN ARBOR, Mich. and LIBERTYVILLE, Ill. (PRWEB) , ... ... ... NSF International, a leading provider of regulatory compliance, quality systems, ... acquired Avarent LLC, a consulting firm with expertise in medical device products/processes ...
(Date:9/2/2015)... 02, 2015 Research ... addition of Jain PharmaBiotech,s new report "DNA ... their offering. This report briefly reviews ... technologies, and their applications. Current large and small ... them. Various applications of sequencing are described including ...
Breaking Biology Technology:Axovant Sciences To Present At Upcoming Investor Conferences 2Axovant Sciences To Present At Upcoming Investor Conferences 3Global Nanobiotechnology Applications, Markets and Companies Report 2015-2024 2Global Nanobiotechnology Applications, Markets and Companies Report 2015-2024 3NSF International Strengthens Medical Device Consulting With Acquisition of Avarent LLC 2NSF International Strengthens Medical Device Consulting With Acquisition of Avarent LLC 3NSF International Strengthens Medical Device Consulting With Acquisition of Avarent LLC 4NSF International Strengthens Medical Device Consulting With Acquisition of Avarent LLC 5NSF International Strengthens Medical Device Consulting With Acquisition of Avarent LLC 6NSF International Strengthens Medical Device Consulting With Acquisition of Avarent LLC 7Global DNA Sequencing Technologies Report 2015: Profiles of 130 Companies Involved in Sequencing and their 140 Collaborations 2
... SAN DIEGO, Sept. 16 TriLink BioTechnologies, Inc. (TriLink), ... discontinued the service in May 2009 after ordering trends in ... However, strong customer feedback led TriLink to bring back its ... "We,ve learned that no other suppliers have exactly our expertise ...
... NEW HAVEN, Conn., Sept. 16 Rib-X Pharmaceuticals, ... of novel drugs for the treatment of multi-antibiotic resistant infections, ... Company,s Board of Directors, succeeding Joseph Amprey, MD, Ph.D. ... MedImmune, Chief Executive Officer of AstraZeneca North America, and Executive ...
... , , PHILADELPHIA, Sept. ... for biomedical research, molecular diagnostics and personalized medicine, today announced ... joined the company,s advisory team. Dr. Lee is a ... Brigham and Women,s Hospital, Harvard Medical School and the Broad ...
Cached Biology Technology:TriLink BioTechnologies, Inc. Relaunches Oligonucleotide Radiolabeling Services 2Rib-X Pharmaceuticals, Inc. Appoints Tony Zook of MedImmune to Board of Directors 2Rib-X Pharmaceuticals, Inc. Appoints Tony Zook of MedImmune to Board of Directors 3BioNanomatrix Appoints Genomic Research Experts Charles Lee and David L. Barker as Advisers 2BioNanomatrix Appoints Genomic Research Experts Charles Lee and David L. Barker as Advisers 3BioNanomatrix Appoints Genomic Research Experts Charles Lee and David L. Barker as Advisers 4
(Date:8/20/2015)... 2015 NXT-ID, Inc. (NASDAQ: NXTD ) ... on the growing mobile commerce market and creator of ... Smart Card Alliance and the EMV Migration Forum.  ... Smart Card Alliance Latin America (SCALA) Chapter provides NXT-ID, ... thought leaders promoting adoption of smart card technology. ...
(Date:8/17/2015)... Conn. , Aug. 17, 2015  NXT-ID, Inc. ... biometric authentication company focused on the growing mobile commerce ... its new sales campaign for Q4 2015. The new ... marketing team consisting of Amplitude Marketing Group ( http://amplitudemarketing.com/ ... Marketing Group is a leader in retail driven marketing ...
(Date:8/12/2015)... 2015  Synaptics Inc. (NASDAQ: SYNA ), ... announced that four of its fingerprint ID products, ... been named FIDO Certified™ by the Fast IDentity ... Synaptics, Natural ID™ fingerprint solutions are fully compliant ... standard and are interoperable among other products and ...
Breaking Biology News(10 mins):NXT-ID, Inc. Joins Smart Card Alliance and EMV Migration Forum 2NXT-ID, Inc. Joins Smart Card Alliance and EMV Migration Forum 3NXT-ID, Inc. Joins Smart Card Alliance and EMV Migration Forum 4NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 2NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 3Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 2Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 3
... With its deeply embedded roots, sturdy trunk and dense ... structure of nearly unfathomable complexity and beauty. While major ... encompassing every living species, the project is still ... Biodesign Institute, Sudhir Kumar has been filling in the ...
... California, Davis, plant scientist has identified a source of carbon emissions ... change. While earlier studies have found that erosion can bury ... the new study published this week in the journal Proceedings ... that sink is only temporary. "It,s all part of figuring ...
... study show that episodes of reduced precipitation in the Southern ... rise in numbers of mountain pine beetles. The overabundance is ... first to chart the evolution of the current pine beetle ... of beetle outbreaks in the two primary host species, the ...
Cached Biology News:A new computational method for timing the tree of life 2A new computational method for timing the tree of life 3Carbon buried in the soil rises again 2Drought in 2001-2002 fueled Rocky Mountain pine beetle outbreak 2Drought in 2001-2002 fueled Rocky Mountain pine beetle outbreak 3Drought in 2001-2002 fueled Rocky Mountain pine beetle outbreak 4
... DeCypher combines enterprise-scale sequence analysis software with ... bioinformatics analyses. With DeCypher, you can perform searches ... ESTs vs NCBI NT database in under 6 ... to genomic DNA Use HMM analysis ...
...
Mouse polyclonal antibody to ALS2CR8 - amyotrophic lateral sclerosis 2 (juvenile) chromosome region, candidate 8...
...
Biology Products: