Navigation Links
Penn researchers show new level of control over liquid crystals
Date:1/7/2013

researchers were able to generate more complex relationships, such as getting four defects to sit atop each circular post or defects that formed over the points of a triangular post. They were also able to deduce the rules that govern these relationships and predict what defect patterns a given set of post parameters would produce.

"The first layer's molecules tend to be pinned to the edges of the posts," Kamien said, "so changing a post's size and shape will change how many defects can sit on its edges at the same time."

The size discrepancy between the posts and individual molecules of the liquid crystal is also a key feature for using this class of liquid crystal in directed assembly. The posts are each a few microns wide and tall, still microscopically small, but large enough to be easily and economically made to specification. This is much more attractive than trying to directly control the size and arrangement of the liquid crystals' defects.

"The liquid crystal layers are very thin, so the defects are on the order of several nanometers across" Kamien said. "Those defects would normally be very hard to control, especially compared to the posts, which are more like a few thousand nanometers across."

Beyond sensors and displays, these defects can be used in nanomanufacturing.

"If you make defects like dimples, you could put ink in them and use them like a stamp," Kamien said. "Or you could make the inverse of the dimples and make points, which could be used as localized surface plasmon resonance hot spots for chemical and biological sensing or as a topographic protrusion for creating a superhydrophobic surface."

And because the layers of liquid crystals transmit elastic energy, they can also be used to do mechanical work. This means that the top layer could be used as a template to assemble even larger molecules.

"You could put nanoparticles, quantum dots or carbon nanotubes in the liquid cry
'/>"/>

Contact: Evan Lerner
elerner@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. New England Biolabs Introduces Polbase, an Information Repository of Scientific Data for Polymerase Researchers
2. In new quantum-dot LED design, researchers turn troublesome molecules to their advantage
3. Multidisciplinary team of researchers develop world’s lightest material
4. Researchers shrink tumors and minimize side effects using tumor-homing peptide to deliver treatment
5. Innovative MetaMorph® NX Software Shatters Barriers Between Researchers and Image Analysis Goals with Exclusive Visual Workflow
6. UCLA researchers demonstrate fully printed carbon nanotube transistor circuits for displays
7. Penn and Brown researchers demonstrate earthquake friction effect at the nanoscale
8. Two Top Biological Imaging Centers Offer Powerful Free Online Tool to Researchers, Educators, and Public
9. Researchers develop one of the worlds smallest electronic circuits
10. MU researchers identify key plant immune response in fight against bacteria
11. Researchers realize high-power, narrowband terahertz source at room temperature
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Penn researchers show new level of control over liquid crystals
(Date:7/10/2014)... Ouagadougou, Burkina Faso (PRWEB) July 10, 2014 ... Burkina Faso, today have access to an additional ... to increase access to contraception at all levels ... combining a lower-dose formulation of a widely used ... injection system. , Burkina Faso is the first ...
(Date:7/10/2014)... Understanding the need for better quality and ... gap that currently exists in this area, ChanTest has ... of validated ion channel and GPCR cell lines. ... ion channels control many critical physiological functions throughout the ... potential to treat a variety of human diseases. ...
(Date:7/10/2014)... (PRWEB) July 10, 2014 Robert Harman, DVM, ... Medicine company, is proud to announce the relaunch of his ... with a new series called “ What are Stem Cells ... an honest and straightforward foundation in the basics of stem ... decision on the right type of treatment when considering regenerative ...
(Date:7/10/2014)... CA (PRWEB) July 10, 2014 Senior ... institutions and professional associations, addressed the challenges of “Reducing ... Medical Device Industries” through strategic sourcing. Describing the partnership ... with the Supply Chain Management Institute ( SCMI) ... event on June 24 at the Kroc Institute of ...
Breaking Biology Technology:Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 2Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 3Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 4Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 5Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 6Leader in Ion Channel Research Announces Newly Validated and Re-Engineered Cells 2Leader in Ion Channel Research Announces Newly Validated and Re-Engineered Cells 3Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4
... Nev., Sept. 30, 2011 Lifeline Biotechnologies, Inc. (Pink Sheets: ... efforts to reestablish DTC services. Jim Holmes, Lifeline,s ... services to the Company we have not been successful.  We ... The value of Lifeline is not reflected in ...
... , SALT LAKE CITY, Sept. 29, 2011 University of ... catalysts, which are substances that speed chemical reactions and are ... the new method, the chemists also made a discovery that ... discovery: the sizes and electronic properties of catalysts interact to ...
... BioSpace , the leading life sciences employment and ... marking the 14th edition. (Logo: http://photos.prnewswire.com/prnh/20040907/CLTU006LOGO) ... Each company,s brand is added to an electronic and ... as well as at industry events and career fairs. ...
Cached Biology Technology:Lifeline Biotechnologies and Depository Trust Company 2Building better catalysts 2Building better catalysts 3BioSpace Spotlights Southern California's Life Science Community 2
(Date:7/11/2014)... new report from the Wildlife Conservation Society shows ... help economically valuable species such as lobster, conch, ... help re-colonize nearby reef areas. , The reporttitled ... systematic review of research literature from no-take areas ... Dr. Craig Dahlgren, a recognized expert in marine ...
(Date:7/11/2014)... were many fires burning in eastern New South Wales, ... 11. , At 03:35 UTC on July 11 (12:35 ... Aqua passed over eastern New South Wales (NSW), the ... visible image of the region and spotted smoke (light ... MODIS,s thermal bands, are outlined in red. , The ...
(Date:7/11/2014)... and Mineral Research awarded Michael F. Holick, PhD, MD, ... 2014 Louis V. Avioli Award. Holick, a professor of ... for revolutionizing the understanding of vitamin D and its ... a member of the American Society for Bone and ... mineral basic research. It is named for ASBMR,s first ...
Breaking Biology News(10 mins):Belize's lobster, conch, and fish populations rebuild in no-take zones 2BUSM's Michael F. Holick receives American Society for Bone and Mineral Research award 2
... from the Buck Institute for Age Research offers a ... neurodegenerative disorder which afflicts 24 million people worldwide. ... a protein implicated in AD, scientists in California and ... a new therapeutic target for the disease. The finding ...
... fish do it. But Prof. Yossi Loya from Tel Aviv ... to discover that Japanese sea corals engage in "sex switching" ... survival of fragile sea corals ― essential to all life ... In times of stress like extreme hot spells, the ...
... group of scientists is renewing calls for policymakers to ... eutrophication or nutrient pollution problems in fresh ... Science , the researchers argue that dual-nutrient reduction ... complex interactions between nitrogen and phosphorus in fresh and ...
Cached Biology News:A revolutionary new model for Alzheimer's disease 2Changing sexes on the sea floor 2
... products ATP-Free using Mo Bio luciferase assay. Mo ... service that will allow you to certify your ... and enable you to deliver them to your ... ATP detection limit is 3.5 x 10-12 /l, ...
... provides a comprehensive microarray service for ... embedded within non-coding RNAs (ncRNAs) using ... probe design, which enables highly sensitive ... RNAs (1). This comprehensive service includes ...
Best pricing for 100mg-1.0g scales. Phosphopeptides are our specialty....
... For knockdown of all human, mouse, ... , Genomewide, predesigned siRNAs for ... , Ready-to-use, convenient matching solutions ... Cost-effective RNAi and downstream ...
Biology Products: