Navigation Links
Penn researchers grow liquid crystal 'flowers' that can be used as lenses
Date:12/20/2013

g changes in the patterns of defects on the surface of the liquid crystal resting on top of them. In another experiment, they showed they could make a "hula hoop" of defects around individual posts, which would then act as a second template for a ring of defects at the surface.

In their latest work, the researchers used a much simpler cue.

"Before we were growing these liquid crystals on something like a trellis, a template with precisely ordered features," Kamien said. "Here, we're just planting a seed."

The seed, in this case, were silica beads essentially, polished grains of sand. Planted at the top of a pool of liquid crystal flower-like patterns of defects grow around each bead.

The key difference between the template in this experiment and ones in the research team's earlier work was the shape of the interface between the template and the liquid crystal.

In their experiment that generated grid patterns of defects, those patterns stemmed from cues generated by the templates' microposts. Domains of elastic energy originated on the flat tops and edges of these posts and travelled up the liquid crystal's layers, culminating in defects. Using a bead instead of a post, as the researchers did in their latest experiment, makes it so that the interface is no longer flat.

"Not only is the interface at an angle, it's an angle that keeps changing," Kamien said. "The way the liquid crystal responds to that is that it makes these petal-like shapes at smaller and smaller sizes, trying to match the angle of the bead until everything is flat."

Surface tension on the bead also makes it so these petals are arranged in a tiered, convex fashion. And because the liquid crystal can interact with light, the entire assembly can function as a lens, focusing light to a point underneath the bead.

"It's like an insect's compound eye, or the mirrors on the biggest telescopes," said Kamien. "As we lear
'/>"/>

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

Page: 1 2 3

Related biology news :

1. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
2. UC Santa Barbara researchers discover genetic link between visual pathways of hydras and humans
3. Researchers attempt to solve problems of antibiotic resistance and bee deaths in one
4. UNH researchers find African farmers need better climate change data to improve farming practices
5. Ottawa researchers to lead world-first clinical trial of stem cell therapy for septic shock
6. Researchers uncover molecular pathway through which common yeast becomes fungal pathogen
7. Researchers print live cells with a standard inkjet printer
8. Columbia Engineering and Penn researchers increase speed of single-molecule measurements
9. Researchers reveal how a single gene mutation leads to uncontrolled obesity
10. Researchers discover novel therapy for Crohns disease
11. New paper by Notre Dame researchers describes method for cleaning up nuclear waste
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Penn researchers grow liquid crystal 'flowers' that can be used as lenses
(Date:9/18/2014)... deep in the primitive brainstem has revealed how we ... School of Medicine and the University at Buffalo School ... second "sleep node" identified in the mammalian brain whose ... produce deep sleep. , Published online in August in ... half of all of the brain,s sleep-promoting activity originates ...
(Date:9/18/2014)... research into the Crimean-Congo hemorrhagic fever virus (CCHFV), a ... humans similar to that caused by Ebolavirus, has identified ... has the potential to lead to novel targets for ... research, reported in a paper published today in the ... at the Texas Biomedical Research Institute and their colleagues, ...
(Date:9/18/2014)... and the Quebec government have discovered microplastics (in ... of Fisheries and Aquatic Sciences . , The ... industrial cleansers, to which they are commonly added ... buoyancy, they may readily pass through sewage treatment ... the world,s oceans, but have only recently been ...
Breaking Biology News(10 mins):No sedative necessary: Scientists discover new 'sleep node' in the brain 2Research milestone in CCHF virus could help identify new treatments 2Microplastic pollution discovered in St. Lawrence River sediments 2
... have fish-like sensations, advanced ship design and more, four ... on Dec. 23 learned they will receive the nation,s ... researchers have been selected for Presidential Early Career Awards ... at a ceremony at the White House early this ...
... forces in a quest to correct a faulty chromosome through ... , used stem cells to correct a defective "ring chromosome" ... correct chromosome abnormalities that give rise to birth defects, mental ... may be possible to use this approach to take cells ...
... a key difference in the biological mechanisms by which the ... study, published in the journal Nature Immunology and ... Life Sciences, centred on STAT1, a protein that can bind ... in the body. STAT-1 responds to interferon signals, hormone-like ...
Cached Biology News:White House lauds ONR-funded researchers for early success 2Nature study discovers chromosome therapy to correct a severe chromosome defect 2Nature study discovers chromosome therapy to correct a severe chromosome defect 3Research uncovers key difference between our bodies' fight against viruses and bacteria 2
(Date:9/18/2014)... , Sept. 18, 2014  Health Enhancement Products, Inc. ... investigating early-stage algae bioactive compounds and metabolic processes, is pleased ... company,s board of directors. Ms. Nola E. Masterson , ... advisor joined the board effective September 17, 2014. ... agree to join our board," states Andrew Dahl , ...
(Date:9/18/2014)... 2014 On Tuesday, Secretary of Energy ... Risch for National Lab Day on the Hill. The ... national laboratory system. Durbin and Risch also formally launched ... awareness of the reach of the national labs as ... address some of our nation's most pressing challenges. , ...
(Date:9/18/2014)... -- Research and Markets has announced the ... 2014" report to their offering. ... professional and in-depth study on the current state of ... provides a basic overview of the industry including definitions, ... market analysis is provided for the international markets including ...
(Date:9/18/2014)... 2014  U.S. biotech company Kultevat has ... for technology developed by the Donald Danforth Plant ... including for applications in production of natural rubber in ... was developed under the direction of Roger Beachy ... president of the Danforth Plant Science Center, and is ...
Breaking Biology Technology:Health Enhancement Announces New Board Member In Advance Of Annual Shareholder Meeting 2Lab Day Highlight Labs' Contribution to U.S. Competitiveness and Innovation 2Lab Day Highlight Labs' Contribution to U.S. Competitiveness and Innovation 3Global Human Albumin Industry Report 2014 2Global Human Albumin Industry Report 2014 3Kultevat obtains license of gene switch technology 2
... magnetic fields and tiny iron-bearing particles to drive healthy ... done in animals, may lead to a new method ... diseased organs in people. , The study team, led ... Chair of Pediatric Cardiology at The Childrens Hospital of ...
... BALTIMORE, Jan. 7 Physicians and ... California will benefit from,a new partnership ... University,Medical Center, providing resources to help ... thereby improving patient care., (Logo: ...
... 7 Cephalon, Inc. (Nasdaq:,CEPH) announced today that the ... the JPMorgan Healthcare Conference are now available on the,"Investor ... On Tuesday, January 8, 2008, Frank Baldino, Jr.,Ph.D., Chairman ... the,Conference beginning at 2:00 p.m. Pacific Time (5 p.m. ...
Cached Biology Technology:Researchers use magnetism to target cells to animal arteries 2Researchers use magnetism to target cells to animal arteries 3Physicians Practice, Loma Linda Partner to Improve Patient Care in Southern California 2Cephalon Presentation Slides for the 26th Annual JPMorgan Healthcare Conference Now Available 2
Mouse monoclonal antibody raised against a partial recombinant FBXO11. NCBI Entrez Gene ID = FBXO11...
Mouse polyclonal antibody raised against a partial recombinant LASS3. NCBI Entrez Gene ID = 204219...
... Antibody against Nonmuscle Myosin II Heavy ... (Stored in TBS + 0.03% Thimerosal) ... peptide SDVNETQPPQSE corresponding to the C-terminus ... B (MHC-B) This antibody is effective ...
... Anti-Mi-2 Immunogen : ... acid residues 474-970 of human ... 7.4, 0.105M NaCl, 0.035% sodium ... Assurance: routinely evaluated by immunoblot ...
Biology Products: