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:12/19/2014)... December 18, 2014 With only 2 ... special on Sartorius Biohit products . The product ... pipettes, Picus Electronic Pipette Trade-in Program, and free pipette ... Safety officers around the world. They are ideal for ... features include:, ,     Full volume range of ...
(Date:12/17/2014)... NY (PRWEB) December 16, 2014 The ... changes since 2013, which is why IBISWorld updated its ... industry continues to benefit from an intensified focus on ... proposal for new emission standards for power plants and ... operators. According to IBISWorld Industry Analyst Sarah Kahn, “a ...
(Date:12/17/2014)... 17, 2014 Once more, EMAAR ... larger packaged waste water treatment plant to phase one ... City (KAEC). Two years ago Bioshaft successfully supplied and ... serving two residential towers with an occupancy of 900 ... quarter million gallons per day and was signed on ...
(Date:12/17/2014)... 16, 2014  Vermillion, Inc. (NASDAQ: VRML ... today announced the next step in its expanded strategy ... provider with the naming of current Chief Operating Officer, ... Officer, while current Chairman of the Board and CEO ... Chairman. These changes are effective January 1, 2015. ...
Breaking Biology Technology:Major Pipette Distributor Pipette.com Announces Sartorius Year End Specials 2Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 2Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 4
... Legislature are bogged down in a budget fight, just like ... is in Wisconsin. But there's an important distinction between the ... the few areas of agreement, not a source of perpetual ... and Governor Tim Pawlenty are behind schedule in most ways ...
... Congress as well as the Wisconsin Legislature, it is becoming ... research to persuade fellow lawmakers that such science is unethical. ... public opinion about its relative merits is beginning to carry ... of life and the promise of science, the House of ...
... could offer treatment for the underlying process not ... second Governor's Business Plan Contest on Tuesday, ... , ,Mithridion, a University of Wisconsin-Madison spinoff, emerged as ... for the judges. Even before that, co-founder Jeff Johnson, ...
Cached Biology Technology:Feuds between UW and the Legislature should end for good of the state 2Feuds between UW and the Legislature should end for good of the state 3With ethics guidelines, political consensus emerging on stem-cell research 2With ethics guidelines, political consensus emerging on stem-cell research 3Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 2Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 3Alzheimer's drug firm and more winners named in Wisconsin business-plan contest 4
(Date:12/19/2014)... , Dec. 18, 2014   LaunchKey , the ... the post-password and Internet of Things era, today announced ... The venture round was led by Metamorphic Ventures with ... Venture Partners, VegasTechFund, and others.  LaunchKey has raised $4 ... to expand its team and bring LaunchKey to market ...
(Date:12/17/2014)... Dec. 16, 2014 Valencell, a leader in ... biometric technology to industry leaders such as Intel, Jabra, ... validated, biometric wearable products. These products will be showcased ... Las Vegas . "Our ... flexible and robust – with the clinical data to ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has ... in the APAC Region 2015-2019"  report to their ... in this market is advances in technology. With ... upgrade biometric solutions to the latest standard that ...
Breaking Biology News(10 mins):LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... Humans are having an effect on Earth,s ecosystems but it,s ... the planet we are causing. Now you can add an ... The only question is how large of an impact will ... issue of Science (Dec. 16, 2011), Arizona State ...
... Ill. Clinical gene therapy may be one step closer, ... molecules. A group of University of Illinois researchers, led ... short spiral-shaped proteins can efficiently deliver DNA segments to cells. ... Chemie. "The main idea is these are new ...
... identified a gene mutation that researchers estimate dates back to ... yet discovered. , Researchers with the Ohio State University Comprehensive ... J. Solove Research Institute led the study and estimate that ... ago. Only a mutation seen in cystic fibrosis that arose ...
Cached Biology News:Researchers assess effects of a world awash in nitrogen 2Let's do the twist: Spiral proteins are efficient gene delivery agents 2Let's do the twist: Spiral proteins are efficient gene delivery agents 3Scientists discover second-oldest gene mutation 2
... SAGE (serial analysis of gene ... expression analysis. Expression profiles generated ... to detect low-abundance transcripts making ... genes. The I-SAGE Kit is ...
Human LAIR2 Biotinylated Affinity Purified PAb...
... mycobacteria in Complete Freund's adjuvant attract macrophages ... which enhances the immuneresponse. For this reason, ... the initial injections; Incomplete Freund's adjuvant is ... in saline) are typically mixed with an ...
2,4-Dinitrophenyl hapten is conjugated to Human Serum Albumin (HSA) protein through lysine....
Biology Products: