Navigation Links
New optical tweezers trap specimens just a few nanometers across
Date:12/4/2012

To grasp and move microscopic objects, such as bacteria and the components of living cells, scientists can harness the power of concentrated light to manipulate them without ever physically touching them.

Now, doctoral student Amr Saleh and Assistant Professor Jennifer Dionne, researchers at the Stanford School of Engineering, have designed an innovative light aperture that allows them to optically trap smaller objects than ever before potentially just a few atoms in size.

The process of optical trapping or optical tweezing, as it is often known involves sculpting a beam of light into a narrow point that produces a strong electromagnetic field. The beam attracts tiny objects and traps them in place, just like a pair of tweezers.

Unfortunately, there are natural limits to the technique. The process breaks down for objects significantly smaller than the wavelength of light. Therefore, optical tweezers cannot grasp super-small objects like individual proteins, which are only a couple of nanometers in diameter.

Saleh and Dionne have shown theoretically that light passed through their novel aperture would stably trap objects as small as 2 nanometers. The design was published in the journal Nano Letters, and Saleh is now building a working prototype of the microscopic device.

Agonies of scale

As a materials scientist, Jennifer Dionne imagined an optical tool that would help her precisely move molecular building blocks into new configurations. "Optical tweezers seemed like a really cool way of assembling new materials," she said. Dionne is the paper's senior author.

Unfortunately, existing optical tweezers are not adept at handling these tiny building blocks. "It's been a known for several decades that trapping nano-sized objects with light would be challenging," said Dionne.

The problem is inherent to the light beam itself. Optical trapping typically uses light in the visible s
'/>"/>

Contact: Andrew Myers
admyers@stanford.edu
650-736-2245
Stanford School of Engineering
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Optical waveguide connects semiconductor chips
2. Optical boomerangs, ultralight fractal materials, and more
3. Acoustic tweezers capture tiny creatures with ultrasound
4. Newly demonstrated capabilities of low-powered nanotweezers may benefit cellular-level studies
5. High-resolution atomic imaging of specimens in liquid by TEM using graphene liquid cell
6. TGen method isolates biospecimens for treatment of kidney disease
7. Disease-carrying colonizers on the move: Predicting the spread of ticks across Canada
8. Stoneflies mapped across Ohio, with implications for water quality and nature conservation
9. Researchers across North America team up to find genetic markers for autism
10. NASA satellites see wildfires across Colorado
11. Same adaptations evolve across different insects
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New optical tweezers trap specimens just a few nanometers across
(Date:4/16/2014)... director of the Physical Biosciences Division of Lawrence Berkeley ... recognized as a leading authority on the evolutionary design ... to systems and synthetic biology, has been named one ... Award by U.S. Energy Secretary Ernest Moniz. The E.O. ...
(Date:4/16/2014)... Geologic and soil processes are to blame for significant ... a study published recently in the Journal of Environmental ... all corners of Ohio showed that every single sample had ... the U.S. Environmental Protection Agency. The findings should not alarm ...
(Date:4/15/2014)... neurobiologists have found that genetically modified neural stem cells show ... the symptoms and pathology of Alzheimer,s disease. The pre-clinical trial ... Therapy , and the approach has been shown to work ... of the most common forms of dementia, is associated with ...
Breaking Biology News(10 mins):Berkeley Lab's Adam Arkin wins 2013 Lawrence Award 2Berkeley Lab's Adam Arkin wins 2013 Lawrence Award 3Significant baseline levels of arsenic found in Ohio soils are due to natural processes 2Significant baseline levels of arsenic found in Ohio soils are due to natural processes 3Significant baseline levels of arsenic found in Ohio soils are due to natural processes 4UCI study finds modified stem cells offer potential pathway to treat Alzheimer's disease 2
... London is part of an international consortium of scientists who ... euros, over ten years, to simulate ,everything we know about ... Science, Health and Medicine at King,s is a partner in ... dozens of groups of neuroscientists from many countries in Europe, ...
... service that is designed to make it quick and ... philanthropically-funded and not-for-profit, this project builds on the belief ... the coming era of Web-native science. , ImpactStory is ... data and radical transparency for the future of science. ...
... are caused by bacteria resistant to antibiotics and ... it is becoming increasingly difficult to treat infected patients ... which was published today, the Academy of Sciences and ... Sciences Leopoldina list eight recommendations that show ways to ...
Cached Biology News:Human Brain Project funded - 1 billion euros to map the human brain 2ImpactStory metrics of academic research outreach piloted by Pensoft Publishers 2
(Date:1/15/2014)... 15, 2014 DTS Language Services, Inc ... Web Portal for Life Science organizations who need document translations. ... subject matter of their documents in advance with a selection ... time-to-delivery of translations, often a critical factor in clinical and ...
(Date:1/15/2014)... TaiGen Biotechnology Company, Limited ("TaiGen") today announced that ... leading Russian pharmaceutical company, to develop and commercialize nemonoxacin ... , Turkey and other ... novel antibiotic for the treatment of bacterial infections including ...
(Date:1/14/2014)... Jan. 14, 2014  3D Communications, a leading provider of strategic communications ... and media events in the United States ... Virginia Cox , JD, is returning to the firm,s ... re-joins 3D after more than two years of service as ...
(Date:1/14/2014)... and BETHESDA, Md. , Jan. 14, ... with two institutes from the National Institutes of Health ... bringing safer, more effective treatments to patients on a ... for Advancing Translational Sciences (NCATS) and the National Eye ...
Breaking Biology Technology:DTS Improves Efficiency for Life Science Document Translations 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4Former FDA Associate Commissioner Returns To 3D Communications 2Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3
... June 11 The Champalimaud Foundation, one of ... J. Anthony Movshon , Director of New York ... T. Newsome , Investigator at The Howard Hughes Medical Institute ... the recipients of its 2010 Vision Award.  The prestigious Champalimaud ...
... June 5 Delcath Systems, Inc. (Nasdaq: ... device company focused on oncology, highlighted the Phase III ... the American Society of Clinical Oncology,s 2010 Annual Meeting, ... alternative care for patients with hepatic metastases from ocular or ...
... ... of the influenza virus and its human host, post-graduate student Stephen Huff of the University ... software downloads - best of all, the service is free. , ... (PRWEB) June 5, 2010 -- We call them computer ...
Cached Biology Technology:Prestigious International Champalimaud Vision Award to US Scientists 2Prestigious International Champalimaud Vision Award to US Scientists 3Prestigious International Champalimaud Vision Award to US Scientists 4Delcath Highlights Phase III Trial Results Presented at ASCO 2Delcath Highlights Phase III Trial Results Presented at ASCO 3Computational Microbiologist Uses His Expertise with Deadly Viruses to Devise a Superior System for Delivery of Safe, Free Software Downloads 2Computational Microbiologist Uses His Expertise with Deadly Viruses to Devise a Superior System for Delivery of Safe, Free Software Downloads 3Computational Microbiologist Uses His Expertise with Deadly Viruses to Devise a Superior System for Delivery of Safe, Free Software Downloads 4
... been designed for recovery of DNA from TAE and ... Ultra fast protocol: DNA is ready to use ... to resuspend Bead uniformity prevents shearing of high ... PCR) DNA is eluted into sterile water or ...
... enables efficient extraction of DNA fragments from 150 bp ... The procedure uses GelMelt solution to dissolve the gel ... silica membrane in a spin column format. After a ... buffer. Each spin column can bind up to 20 ...
... of DNA from agarose gels The SpinPrep Gel ... 150 bp to > 12,000 bp in size from ... the gel slice, followed by adsorption of the DNA ... After a wash step, the purified DNA is eluted ...
When added to either StemSep CD4+ or CD8+ T Cell Enrichment cocktails, human HLA-DR TAC is designed to deplete human HLA-DR from samples to isolate resting CD4+ or CD8+ T cells....
Biology Products: