Navigation Links
Rice University lab develops technique to control light from nanoparticles
Date:9/29/2011

s can tunably block or filter light.

The Rice team used gold nanorods as their polarized light source. The rods act as optical antennas; when illuminated, their surface plasmons re-emit light in a specific direction.

In their experiment, the team placed randomly deposited nanorods in an array of alternating electrodes on a glass slide; they added a liquid crystal bath and a cover slip. A polyimide coating on the top cover slip forced the liquid crystals to orient themselves parallel with the electrodes.

Liquid crystals in this homogenous phase blocked light from nanorods turned one way, while letting light from nanorods pointed another way pass through a polarizer to the detector.

What happened then was remarkable. When the team applied as little as four volts to the electrodes, liquid crystals floating in the vicinity of the nanorods aligned themselves with the electric field between the electrodes while crystals above the electrodes, still under the influence of the cover slip coating, stayed put.

The new configuration of the crystals -- called a twisted nematic phase -- acted like a shutter that switched the nanorods' signals like a traffic light.

"We don't think this effect depends on the gold nanorods," Link said. "We could have other nano objects that react with light in a polarized way, and then we could modulate their intensity. It becomes a tunable polarizer."

Critical to the experiment's success was the gap in the neighborhood of 14 microns -- between the top of the electrodes and the bottom of the cover slip. "The thickness of this gap determines the amount of rotation," Link said. "Because we created the twisted nematic in-plane and have a certain thickness, we always get 90-degree rotation. That's what makes it a super half wave plate."

Link sees great potential for the technique when used with an array of nanoparticles oriented in specific directions, in which each particle wo
'/>"/>

Contact: David Ruth
druth@rice.edu
713-348-6327
Rice University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Parent Project Muscular Dystrophy Awards End Duchenne Grant to University of Pennsylvanias Dr. Tejvir S. Khurana
2. University of Western Ontario researchers investigate stress and breast cancer
3. SanBio Announces Site Opening of Phase 1/2a Clinical Trial of Novel Cell Therapy in Stable Stroke Patients at University of Pittsburgh Medical Center
4. HUYA Bioscience International Forms Alliance With Zhejiang Chinese Medical University Life Science College
5. Swedish University Hospital Improves Monitoring of Treatment Efficacy in Multiple Sclerosis With Synthetic MRI Innovation
6. University of Houston receives NSF grant for high school teachers program
7. New nanoscale parameter by Aalto University resolves dilemmas on silicon property
8. University of Muenster Bridges 1st Patient to Transplant with SynCardias Total Artificial Heart
9. Elsevier and the National University of Singapore Announce Winners of 24-Hour Hackathon
10. The Human Brain is Sensitive to Light, Breakthrough Findings From Valkee and the University of Oulu
11. CEM President and CEO Delivers Commencement Address at the University of Texas at Austin Chemistry and Biochemistry Department Graduation
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/1/2014)...  Pressure BioSciences, Inc. (OTCQB: PBIO) ("PBI" or the ... of high pressure-based sample preparation systems to the life ... to present at the 2 nd  Global Life ... The Conference will take place at the Warsaw Stock ... Schumacher , President and CEO of PBI, will present ...
(Date:10/1/2014)... City, CA (PRWEB) October 01, 2014 As ... it leaves no room for doubt that this century would ... innovations in the field of medicine science. The fact that ... problems is not unknown to the scientific community. Almost half ... pollution and therefore can be prevented with medical care and ...
(Date:10/1/2014)... 2014 New applications of structures and ... evolved in nature over millennia are featured in a ... for applications in biophotonics in the October issue of ... is published by SPIE, the international society for optics ... the peer-reviewed articles are accessible via open access. , ...
(Date:10/1/2014)... 01, 2014 The U.S. Department of ... Illinois University Edwardsville as part of the Trade Adjustment ... funding is co-administered by the Department of Labor and ... of Labor Thomas E. Perez and Secretary of Education ... job-driven training grants to nearly 270 colleges across the ...
Breaking Biology Technology:Pressure BioSciences, Inc. Invited to Present at the 2nd Global Life Sciences Conference in Warsaw, Poland 2Pressure BioSciences, Inc. Invited to Present at the 2nd Global Life Sciences Conference in Warsaw, Poland 3Pressure BioSciences, Inc. Invited to Present at the 2nd Global Life Sciences Conference in Warsaw, Poland 4Fighting Mortality and Morbidity of Chronic Health Disorders during Open Access Week 2Fighting Mortality and Morbidity of Chronic Health Disorders during Open Access Week 3Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 2Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 3U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 3U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 4
... WASHINGTON, Oct. 5 The Coalition for a,Competitive ... the Food and Drug Administration,s announcement regarding its,"Generic ... consumers, employers, insurers, and policymakers grappling with,how to ... that FDA,and Congress continue to focus on ways ...
... Lexicon,Pharmaceuticals, Inc. (Nasdaq: LXRX ) today announced that ... officer, will present,at the BIO InvestorForum at The Palace ... at 11:00 a.m. Pacific Time. A live webcast ... at http://www.lexpharma.com . An archived version of the,webcast ...
... Pharmasset, Inc.,(Nasdaq: VRUS ) has entered into ... Subject to certain terms and conditions of,the agreement, Horizon ... At its option, Pharmasset may receive a second loan ... loan of $10 million by November 30, 2008,provided conditions ...
Cached Biology Technology:CCPM Issues Statement on FDA's GIVE Initiative 2Lexicon Pharmaceuticals to Present at Bio InvestorForum 2Pharmasset Accesses up to $30 Million of Working Capital 2Pharmasset Accesses up to $30 Million of Working Capital 3
(Date:9/30/2014)... (PCE) in drinking water may increase the risk ... new study led by a Boston University School ... in the journal Environmental Health , compared ... 1,766 women in Cape Cod, Ma., where water ... early 1980s by the installation of vinyl-lined asbestos ...
(Date:9/30/2014)... FRANKFURT. Truffles, along ... world. Because they grow underground, people use trained dogs or ... is not only of interest to gourmets. A group of ... University Frankfurt have discovered that the smell of white truffles ... truffle fruiting bodies. , White truffles from the Piedmont region ...
(Date:9/30/2014)... Researchers of Ludwig-Maximilians-Universitaet (LMU) in Munich report that ... cells more sensitive to chemotherapeutic drugs. They have ... a new target for anti-tumor agents. , ... Professor Stephan Sieber of the Technische Universitt Mnchen ... a potential new weapon in the fight against ...
Breaking Biology News(10 mins):Contaminated water linked to pregnancy complications, BU study finds 2On the trail of the truffle flavor 2Cancer therapy: Driving cancer cells to suicide 2
... minds about the head size of an ancient human ancestor, ... may have been. Found in Gona, Ethiopia, not far from ... of the famed Australopithecus afarensi "Lucy," the pelvis indicates that ... ago, had a larger birth canal than originally suspected and ...
... , 2008 Arbor Vita Corporation (AVC), a ... its rapid, point-of-care prototype HPV test with a high ... for use throughout the developing world, this diagnostic test ... presentation, "Development of a Rapid Diagnostic Test for Cervical ...
... to make cancer treatment safer A new piece ... (NPL) today will help improve the success rates of ... (linac) will help ensure patients are treated with accurate ... using ionising radiation such as high-energy X-rays or electron ...
Cached Biology News:Arbor Vita presents new data on cancer diagnostic at EUrogin 2NPL unveils new equipment to make cancer treatment safer 2
... you reduce the chance of error. Thats ... Developed using Beckman Coulters extensive experience in ... technology, the CEQ 8000 is a fully ... fills the capillary array with a patented ...
... Chemicon Detergent-OUT Kit is a simple high ... solutions. Removes detergents without significant dilution ... protein solution on the Detergent-OUT Spin column ... columns are suitable for removing detergent from ...
... The standard electrophoresis hood is ... documentation systems. Placed on the ... in place and provides a ... on the lab bench. This ...
... SDS Kit is a simple high performance ... Removes detergents without significant dilution of ... solution on the Detergent-OUT Spin column and ... columns are suitable for removing detergent from ...
Biology Products: