Navigation Links
New paper offers breakthrough on blinking molecules phenomenon
Date:8/11/2010

A new paper by University of Notre Dame physicist Boldizsr Jank and colleagues offers an important new understanding of an enduring mystery in chemical physics.

More than a century ago, at the dawn of modern quantum mechanics, the Noble Prize-winning physicist Neils Bohr predicted so-called "quantum jumps." He predicted that these jumps would be due to electrons making transitions between discrete energy levels of individual atoms and molecules. Although controversial in Bohr's time, such quantum jumps were experimentally observed, and his prediction verified, in the 1980s. More recently, with the development of single molecule imaging techniques in the early 1990s, it has been possible to observe similar jumps in individual molecules.

Experimentally, these quantum jumps translate to discrete interruptions of the continuous emission from single molecules, revealing a phenomenon known as fluorescent intermittency or "blinking."

However, while certain instances of blinking can be directly ascribed to Bohr's original quantum jumps, many more cases exist where the observed fluorescence intermittency does not follow his predictions. Specifically, in systems as diverse as fluorescent proteins, single molecules and light harvesting complexes, single organic fluorophores, and, most recently, individual inorganic nanostructures, clear deviations from Bohr's predictions occur.

As a consequence, virtually all known fluorophores, including fluorescent quantum dots, rods and wires, exhibit unexplainable episodes of intermittent blinking in their emission.

The prevailing wisdom in the field of quantum mechanics was that the on and off blinking episodes were not correlated. However, at a 2007 conference on the phenomenon sponsored by Notre Dame's Institute for Theoretical Sciences, which Jank directs, Fernando Stefani of the University of Buenos Aires presented research suggesting that there was, in fact, correlation between these on and off events.
'/>"/>

Contact: Boldizsar Janko
jano.2@nd.edu
574-850-9850
University of Notre Dame
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Live Webinar: Lonza's Paperless EM Success and Acquisition of MODA
2. Webinar Alert: Managing Paper at Its Roots: Extending Beyond Document Management to Enterprise Content Compliance
3. Live Webinar: Paperless QC Micro Implemented by Talecris Biotherapeutics
4. Berkeley Lab scientists create molecular paper
5. 'Cancer Research' Has Published a Paper on the Activity of MM-121, an ErbB3 Inhibitor, in Ligand-dependent Tumors
6. Nanotechnology sparks energy storage on paper and cloth
7. Adaptive Trial Paper Explores Benefits of Adaptive Trials for Phase I, Phase II Studies
8. PharmAthene Submits White Paper to BARDA for Advanced Development Funding for SparVax(TM) - Novel Recombinant Protective Antigen Anthrax Vaccine
9. Dip ordinary paper into ink infused with nanotubes and nanowires to create an instant battery
10. Free Organic Electronics White Paper Discusses Rfid Tags, OLED, AM OLED, PM OLED, Electroluminescence, e-Paper, OE Market Forecast
11. PharmSource Releases White Paper on Role of U.S. Foreign Corrupt Practices Act (FCPA) in the Bio/Pharma Industry
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/25/2014)... 25, 2014 At the request of ... a 60-day extension for the public comment period (Docket ... for Model Aircraft established by Congress as part of ... 60-day extension establishes the new deadline for comments as ... of Transportation/FAA notice published in the Federal Register on ...
(Date:7/24/2014)... Gain recognition for leadership and ... the biotech industry. Nominations are now being accepted ... you by the Bio Supply Management Alliance ... management professionals for the past 7 years. , ... Biotech industry – Manufacturers, Service Providers, Material Suppliers, ...
(Date:7/24/2014)... trained personnel, and detection dogs to safeguard airports ... revolutionary new electronic chip with nano-sized chemical sensors ... , The groundbreaking nanotechnology-inspired sensor, devised by Prof. ... of Chemistry and Center for Nanoscience and Nanotechnology, ... up the scent of explosives molecules better than ...
(Date:7/24/2014)... Although most natural and synthetic processes prefer to ... potential or energyit is within the realm of ... experience constant changes in energy and phases, such ... These conditions allow humans to regulate their body ... rumble with seismic activity. , But even ...
Breaking Biology Technology:FAA Grants Comment Extension at the Request of AMA 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 3Nano-sized chip 'sniffs out' explosives far better than trained dogs 2New approach to form non-equilibrium structures 2
... CITY, Sept. 1 /PRNewswire-FirstCall/ - AEterna Zentaris Inc. (NASDAQ: ... global biopharmaceutical company focused on endocrine therapy and oncology, ... Medical Officer, Paul Blake, M.D., will present a corporate ... Global Investment Conference on Wednesday, September 9, 2009 at ...
... ... leader in adult stem cell research and manufacturing, announced today that it has been ... stem cells for human clinical trials. This Drug Manufacturing License recognizes Stemedica as ... Regulations. , ...
... have completed the first thorough, system-level assessment of ... microbes known as Shewanella. Microbes belonging to that ... cleaning up contaminated areas in the environment. ... of Technology, Michigan State University and the Pacific ...
Cached Biology Technology:Stemedica Achieves Major Milestone - Company Receives License to Manufacture Clinical Grade Stem Cells 2Stemedica Achieves Major Milestone - Company Receives License to Manufacture Clinical Grade Stem Cells 3Hidden diversity in key environmental cleanup microbes found by systems biology assessment 2Hidden diversity in key environmental cleanup microbes found by systems biology assessment 3
(Date:7/25/2014)... professor of biomedical engineering at the University of ... engineering and artificial organ development., "Introduction to Tissue ... to entering into the field of artificial organ ... biomedical engineering at UH, served as a series ... there are other published books on the subject ...
(Date:7/25/2014)... 1 (NRG1) is a pleiotropic factor characterized by ... splicing of exons that confer to the protein ... for both the myelination occurring during development and ... peripheral nerve: axon degeneration, axon regrowth, remyelination and ... Australia have discovered that the soluble NRG1 upregulation ...
(Date:7/25/2014)... that the age girls reach puberty is influenced by ,imprinted ... parent contributes the gene. This is the first evidence ... birth and details of this study were published today in ... period, known as menarche, is a marker for the timing ... onset of menses varies between girls, is an inherited trait, ...
Breaking Biology News(10 mins):University of Houston researcher publishes textbook on tissue engineering 2Could age of first period influence development of diseases in older women? 2
... only too late that strange new bugs are killing their ... out with thistles. At an estimated cost of $3 billion ... water and food security, the recreational value of wilderness areas ... invasive species? Where do they come from? How do they ...
... the growing scientific consensus that global warming is ... environmental problem, according to a first-of-its-kind study led ... gap between Democrats and Republicans who believe global ... and 2010 a "depressing" trend that,s essentially ...
... recent decades, but species have adapted to this, at least ... and wild boar. This has been shown by Spanish ... use on the past, present and future distribution of these ... an increase in the area of distribution of wild ungulates", ...
Cached Biology News:Protecting your garden from invasive species 2Democrats and Republicans increasingly divided over global warming 2Democrats and Republicans increasingly divided over global warming 3Changes in land use favor the expansion of wild ungulates 2