Featured Research

from universities, journals, and other organizations

Optical 'Tweezers' Trap Microparticles

Date:
June 1, 2007
Source:
Nature Physics
Summary:
Scientists have developed a simple technique for trapping suspended microparticles with a laser-illuminated array of gold microdots. The technique could prove useful for manipulating living cells in 'lab-on-a-chip' microfluidic systems.

A simple technique for trapping suspended microparticles with a laser-illuminated array of gold microdots is demonstrated by Romain Quidant and colleagues in Nature Physics. The technique could prove useful for manipulating living cells in 'lab-on-a-chip' microfluidic systems.

Related Articles


Until now, the most promising approach to controlling cells and other micrometre-sized particles suspended in a liquid has been with so-called optical tweezers. These devices exploit the fact that such particles are attracted to and can be trapped by a focused light field. But one of their drawbacks is that they are bulky and complex devices to set up.

The technique demonstrated by Quidant and colleagues is much simpler. It relies on the fact that when a gold microdot or other metallic microstructure is illuminated with light, it will concentrate the optical field in its vicinity, similar in effect to the focusing power of a lens. By setting out an array of gold microdots on a glass slide and illuminating it with a laser, the authors effectively create an array of optical tweezers, which they use to trap microparticles suspended in a fluid droplet placed on the slide. Moreover, they show that they can use the array to selectively trap particles of a specific size from a collection of two different sizes, by controlling the size of the gold dots.

Arrticle: Parallel and selective trapping in a patterned plasmonic landscape, Maurizio Righini, Anna S. Zelenina, Christian Girard & Romain Quidant,
Published online: 21 May 2007 | doi 10.1038/nphys624


Story Source:

The above story is based on materials provided by Nature Physics. Note: Materials may be edited for content and length.


Cite This Page:

Nature Physics. "Optical 'Tweezers' Trap Microparticles." ScienceDaily. ScienceDaily, 1 June 2007. <www.sciencedaily.com/releases/2007/05/070531164935.htm>.
Nature Physics. (2007, June 1). Optical 'Tweezers' Trap Microparticles. ScienceDaily. Retrieved January 26, 2015 from www.sciencedaily.com/releases/2007/05/070531164935.htm
Nature Physics. "Optical 'Tweezers' Trap Microparticles." ScienceDaily. www.sciencedaily.com/releases/2007/05/070531164935.htm (accessed January 26, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Monday, January 26, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Cablevision Enters Wi-Fi Phone Fray

Cablevision Enters Wi-Fi Phone Fray

Reuters - Business Video Online (Jan. 26, 2015) The entry by Cablevision and Google could intensify the already heated price wars for mobile phone service. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Hector the Robot Mimics a Giant Stick Insect

Hector the Robot Mimics a Giant Stick Insect

Reuters - Innovations Video Online (Jan. 26, 2015) A robot based on a stick insect can navigate difficult terrain autonomously and adapt to its surroundings. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Obama's Wildlife Plan Renews Alaska Drilling Debate

Obama's Wildlife Plan Renews Alaska Drilling Debate

Newsy (Jan. 26, 2015) President Obama&apos;s proposal aims to protect more land in the Arctic National Wildlife Refuge, but so far, all that&apos;s materialized is a war of words. Video provided by Newsy
Powered by NewsLook.com
Sundance Films Tap Into Virtual Reality

Sundance Films Tap Into Virtual Reality

Newsy (Jan. 25, 2015) Virtual reality headsets offer more experiences for viewers and filmmakers at the Sundance Film Festival. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins