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:9/23/2014)... years, man has domesticated animals, selecting the best ... sheep offer an intriguing animal to examine adaptation ... centuries of selected breeding and a wealth of ... first-of-its kind study that combined molecular and environmental ... search for genes under environmental selection from domesticated ...
(Date:9/23/2014)... oil sands tailings has just gotten a lot greener ... Alberta civil engineering professors that uses solar energy to ... of using UV lamps as a light source to ... tailings ponds, professors Mohamed Gamal El-Din and James Bolton ... energy source treats the wastewater just as efficiently but ...
(Date:9/23/2014)... A multidisciplinary team at the University of Wisconsin-Madison and ... more affordable way to screen for neural toxins, helping ... National Institutes of Health (NIH) announced today that the ... support to continue the promising work as part of ... will receive approximately $7 million over the three-year project. ...
Breaking Biology News(10 mins):Being sheepish about climate adaptation 2Solar energy-driven process could revolutionize oil sands tailings reclamation 2UW-Madison team developing 'tissue chip' to screen neurological toxins 2UW-Madison team developing 'tissue chip' to screen neurological toxins 3
... (OSCC) is responsible for nearly a quarter of all head ... of cancer death - largely due to the failure of ... New research published in BioMed Central,s open access journal ... predict which patients are at higher risk of OSCC recurrence. ...
... at the University of York and Hull York Medical ... the brain is affected by age. Working with ... in Plymouth, they have studied responses to stress in ... that under stressful conditions, such as neuro-degeneration, resulting high ...
... a key role in turning off disease? Researchers ... a biosensor they,ve created that measures membrane lipid levels may ... distinguished professor of chemistry, and his coworkers engineered a way ... lipid levels. Their findings are reported in Nature ...
Cached Biology News:Researchers study aging's effect on the brain 2New membrane lipid measuring technique may help fight disease 2
(Date:9/23/2014)... This is a professional and ... Isopropanol (IPA) industry. The report provides a basic ... industry chain structure. Global market analysis and Chinese ... on history, developments, trends and competitive landscape of ... Chinese situation is also offered. , The report ...
(Date:9/23/2014)... 23, 2014 Marktech Optoelectronics has introduced ... violet emitters in the 280 nm wavelength range. This ... which range from 280nm to 405nm. These new devices ... as well as curing. Mark Campito, Marktech’s CEO states ... interest to manufacturers is that we offer it in ...
(Date:9/22/2014)... treated with a statin in the hospital after suffering ... survive than those who were not, according to a ... study was conducted by the same researchers who recently ... survival in victims of ischemic stroke., Ischemic stroke is ... vessel that blocks blood from reaching areas of the ...
(Date:9/22/2014)... fragments whose job it is to stop bleeding, are ... they can "feel" the physical environment around them, researchers ... respond to surfaces with greater stiffness by increasing their ... platelets and other components of the clotting system, the ... them credit for, in that they are able to ...
Breaking Biology Technology:(IPA) Isopropanol Industry International & China Development Trend Analysis Now Available at DeepResearchReports.com 2(IPA) Isopropanol Industry International & China Development Trend Analysis Now Available at DeepResearchReports.com 3Marktech Introduces its New Line of Deep UV Emitters 2Statin use during hospitalization for hemorrhagic stroke associated with improved survival 2Platelets modulate clotting behavior by 'feeling' their surroundings 2
... - With Sony set to take over Sonic Foundrys desktop ... go from here? Two words: Mediasite Live. , ,Sonic ... audio conferencing market by enhancing web conferencing with Mediasite Live. ... great opportunity for the company to go forward because there ...
... stream video from their Charleston and Morgantown campuses so students ... All of WVUs core graduate nursing school courses will be ... ,We need more nurses and we need more nurse educators ... professor of nursing at WVU School of Nursing. By using ...
... better drugs, faster part of the speech. Thats where the ... is likely to hit the road, especially as the largest ... become as common in conversation as golf games and grandkids. ... Vodenlich joined as president earlier this year, recently restructured its ...
Cached Biology Technology:Sonic Foundry: What's Next? 2Sonic Foundry Facilitates Nursing Education 2Sonic Foundry Facilitates Nursing Education 3Chipping Away at Drug Development 2Chipping Away at Drug Development 3
Puromycin resistance gene (pac), provided in a pORF plasmid. pORF is an expression plasmid selectable with Ampicillin....
Plasmid expressing Zeocin resistance gene....
...
... template is designed to allow kanamycin/neomycin ... It combines a prokaryotic promoter (gb2) ... E.coli with a eukaryotic promoter (PGK) ... cells. The prokaryotic promoter gb2 is ...
Biology Products: