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:4/22/2014)... of Yale researchers will lead a five-year, $3 million ... events is affecting the transport of dissolved organic matter ... say could alter the chemical composition and water quality ... funding from the National Science Foundation,s MacroSystems Biology program, ... the watershed, which begins in Canada and runs through ...
(Date:4/22/2014)... fist-like club of a mantis shrimp, a team of ... with University of Southern California and Purdue University, have ... more impact resistant and tougher than the standard used ... of this tiny crustacean, the more we realize its ... day," said David Kisailus, a Kavli Fellow of the ...
(Date:4/22/2014)... The Federation of American Societies for Experimental Biology (FASEB) ... (FY) 2013 highlighting how funding from the National Institutes ... DC, and Puerto Rico. "FASEB is pleased to make ... the significance of NIH to their state," said FASEB ... nation,s leading source for biomedical research funding, investing ...
Breaking Biology News(10 mins):Connecticut River watershed study will assess impacts of extreme rain events 2Connecticut River watershed study will assess impacts of extreme rain events 3Mantis shrimp stronger than airplanes 2Mantis shrimp stronger than airplanes 3
... of children with undiagnosed learning disorders, developmental deficits, and ... challenges, which are explored in detail in a reflective ... a peer-reviewed journal published by Mary Ann Liebert, Inc. ... ahead of print at www.liebertpub.com/gtmb ...
... been extinct for 65 million years, newly published data ... is providing invaluable insights into their paleobiology. Ammonites, shelled ... inhabited the oceans for nearly 350 million years. Specimens ... that covered North America during the Cretaceous Period demonstrate ...
... are investigating a potential new treatment for lung disease that ... is studying how statins, drugs which are commonly used to ... , There is currently no effective treatment for acute ... rates for those who become critically ill and suffer lung ...
Cached Biology News:Unexplained childhood disorders 2New discoveries in North America's Great Plains bring ammonites to life 2New discoveries in North America's Great Plains bring ammonites to life 3Queen's University Belfast lung injury study could save lives in critically ill 2
(Date:1/15/2014)... 15, 2014 2013 was a banner ... State Technologies®. They saw continued independent research led by ... were awarded a $1 million grant from the Susanne ... and Behavior” a peer reviewed journal, Amy Grant highlighted ...
(Date:1/15/2014)... 2014 AudioNotch is the internet's leading ... the treatment of tinnitus. Patients listen to sound therapy ... a period of weeks to months, their tinnitus volume decreases. ... forms: Notched Music and Notched White Noise. Now, AudioNotch is ...
(Date:1/14/2014)... January 14, 2014 Date: Friday, April 11, ... Warrington Country Club, 1360 Almshouse Road, Warrington, Pa. ... organization solely dedicated to finding a cure for hepatitis B ... will host its annual Crystal Ball on Friday, April 11 ...
(Date:1/14/2014)... Histogen, Inc., a regenerative medicine company ... under simulated embryonic conditions, today announced that they have ... Inc. for physician-dispensed aesthetic products containing Histogen’s proprietary multipotent ... is an amendment to the existing license between Histogen ...
Breaking Biology Technology:Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3
... Therapies to Address the Underlying Cause of Cystic,Fibrosis; ... SOUTH PLAINFIELD, N.J., Aug. 20 New ... that the investigational oral drug,PTC124 demonstrates activity in ... with PTC124 results in statistically significant,improvements in the ...
... Oncothyreon Inc. (Nasdaq:,ONTY) (TSX: ONY) announced today that ... on August 14, 2008 indicating that Oncothyreon does ... The NASDAQ Global Market,because it does not meet ... (i) the market value of Oncothyreon,s common stock ...
... Crystal Research Associates, LLC,announced today that ... on Generex Biotechnology Corporation (Nasdaq: GNBT ... at http://www.crystalra.com ., Generex Biotechnology ... pharmaceutical company that aims to research, develop, ...
Cached Biology Technology:PTC124 Shows Promising Activity in Cystic Fibrosis; Phase 2 Proof-of-Concept Data Published in the Lancet 2PTC124 Shows Promising Activity in Cystic Fibrosis; Phase 2 Proof-of-Concept Data Published in the Lancet 3PTC124 Shows Promising Activity in Cystic Fibrosis; Phase 2 Proof-of-Concept Data Published in the Lancet 4PTC124 Shows Promising Activity in Cystic Fibrosis; Phase 2 Proof-of-Concept Data Published in the Lancet 5Oncothyreon announces receipt of notice of non-compliance with market value of listed securities standard for listing on The NASDAQ Global Market 2Oncothyreon announces receipt of notice of non-compliance with market value of listed securities standard for listing on The NASDAQ Global Market 3Crystal Research Associates, LLC Issues Executive Informational Overview(R) (EIO(R)) on Generex Biotechnology Corporation 2Crystal Research Associates, LLC Issues Executive Informational Overview(R) (EIO(R)) on Generex Biotechnology Corporation 3