Navigation Links
On the road to plasmonics with silver polyhedral nanocrystals
Date:11/22/2011

structures that have been calculated to be the densest packings of these shapes," Yang says. "In addition, in the case of octahedra, we showed that controlling polymer concentration allows us to tune between a well-known lattice packing structure and a novel packing structure that featured complex helical motifs."

In the Nature Materials paper Yang and his co-authors describe a polyol synthesis technique that was used to generate silver nanocrystals in various shapes, including cubes, truncated cubes, cuboctahedra, truncated octahedra and octahedra over a range of sizes from 100 to 300 nanometers. These uniform polyhedral nanocrystals were then placed in solution where they assembled themselves into dense supercrystals some 25 square millimeters in size through gravitational sedimentation. While the assembly process could be carried out in bulk solution, having the assembly take place in the reservoirs of microarray channels provided Yang and his collaborators with precise control of the superlattice dimensions.

"In a typical experiment, a dilute solution of nanoparticles was loaded into a reservoir that was then tilted, causing the particles to gradually sediment and assemble at the bottom of the reservoir," Yang says. "More concentrated solutions or higher angles of tilt caused the assemblies to form more quickly."

The assemblies generated by this sedimentation procedure exhibited both translational and rotational order over exceptional length scales. In the cases of cubes, truncated octahedra and octahedra, the structures of the dense supercrystals corresponded precisely to their densest lattice packings. Although sedimentation-driven assembly is not new, Yang says this is the first time the technique has been used to make large-scale assemblies of highly uniform polyhedral particles.

"The key factor in our experiments is particle shape, a feature we have found easier to control," Yang says. "When compared with cr
'/>"/>

Contact: Lynn Yarris
lcyarris@lbl.gov
510-486-5375
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. Optical Materials Express focus issue: Nanoplasmonics and metamaterials
2. GRIN plasmonics
3. Diamonds, silver and the quest for single photons
4. Microban Medical Silver Antimicrobial Technologies for HCR Silicone Achieve 5 Log Reductions in Bacteria Growth and Prevent Biofilm Formation
5. Gold and silver nano baubles
6. Sigma® Life Science Awarded Silver in Top Ten Innovations 2010
7. Vital Therapies Expands SILVER Trial to Saudi Arabia
8. Haydon Kerk Motion Solutions Inspires Next Generation of Innovators as Silver Supplier of the FIRST Robotics Competition
9. The toxicity of antimicrobial silver in products can be reduced
10. Microban Signs Exclusive Agreement with Sharp Electronics to Launch Calculators with New Microban(R) 3G Silver(TM) Antimicrobial Technology
11. ULURU Inc. Announces the Filing of a 510k Submission With the FDA for Altrazeal(TM) Silver
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
On the road to plasmonics with silver polyhedral nanocrystals
(Date:9/20/2014)... (PRWEB) September 20, 2014 Entries are ... Prism Awards for Photonics Innovation . The international ... multi-billion dollar optics and photonics industry, and is sponsored ... photonics , and Photonics Media . , The ... versatility of photonics, said SPIE CEO Eugene Arthurs. , ...
(Date:9/19/2014)... rarely simple. From crop yields to disease risks, the ... considered "complex traits." Just as for heightthe textbook example ... human disease are shaped by multiple genetic and environmental ... To track down such genes, geneticists typically mate two ... mouse and a small mouseand then study their descendents, ...
(Date:9/19/2014)...  An entire month is dedicated to one of ... disease (CMT) – a debilitating neuromuscular disease affecting the ... weakness, and foot and hand deformities. CMT affects 1 ... is a progressive disease, and over time patients lose ... such as leg braces, wheelchairs and scooters to get ...
(Date:9/19/2014)... BioTech News Coverage: Progress made ... of studies and trials.  Companies in focus are: GenSpera ... LLY ), Gilead Sciences Inc. (NASDAQ: ... and Arena Pharmaceuticals Inc. (NASDAQ: ARNA) GenSpera, ... for the treatment of cancer, announced that the United ...
Breaking Biology Technology:Entry deadline is 10 October for international photonics Prism Awards 2Entry deadline is 10 October for international photonics Prism Awards 3Entry deadline is 10 October for international photonics Prism Awards 4Want to link genes to complex traits? Start with more diversity 2September is Charcot-Marie-Tooth (CMT) Awareness Month - Scheduled events, activities and important partnerships announced throughout the month! 2Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 2Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 3Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 4Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 5Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 6Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 7
... from Nicusa Capital urging BioClinica (Nasdaq: BIOC ) shareholders ... Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy: ... the Board BioClinica, Inc. 826 Newtown-Yardley Rd. Newtown, PA  18940 ... As of May 4, 2011, Nicusa owns 854,119 shares, ...
... Mass., May 4, 2011 InVivo Therapeutics (OTCBB: ... groundbreaking technologies for the treatment of spinal cord ... School of Medicine,s Miami Project to Cure Paralysis, ... today announced a strategic research collaboration for the ...
... , COLLEGE PARK, Md. It took nearly a decade ... their work identifying the anthrax strain used in the 2001 ... members of the high-powered science team have published the first ... of "microbial forensics" and gave bioterrorism investigators a way to ...
Cached Biology Technology:This is a Letter From Nicusa Capital Urging BioClinica Shareholders to Vote AGAINST Proxy Proposal 2 and WITHHOLD Votes From Incumbent Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy 2This is a Letter From Nicusa Capital Urging BioClinica Shareholders to Vote AGAINST Proxy Proposal 2 and WITHHOLD Votes From Incumbent Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy 3This is a Letter From Nicusa Capital Urging BioClinica Shareholders to Vote AGAINST Proxy Proposal 2 and WITHHOLD Votes From Incumbent Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy 4This is a Letter From Nicusa Capital Urging BioClinica Shareholders to Vote AGAINST Proxy Proposal 2 and WITHHOLD Votes From Incumbent Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy 5InVivo Therapeutics and The Miami Project to Cure Paralysis Form Strategic Research Collaboration to Develop Novel Treatments for Spinal Cord Injuries 2InVivo Therapeutics and The Miami Project to Cure Paralysis Form Strategic Research Collaboration to Develop Novel Treatments for Spinal Cord Injuries 3InVivo Therapeutics and The Miami Project to Cure Paralysis Form Strategic Research Collaboration to Develop Novel Treatments for Spinal Cord Injuries 4Now, the story can be told how scientists helped ID 'Amerithrax' 2Now, the story can be told how scientists helped ID 'Amerithrax' 3
(Date:9/21/2014)... dioxide emissions, the main contributor to global warming, are set ... of 40 billion tonnes. , The 2.5 per cent projected ... Carbon Project, which is co-led in the UK by researchers ... University of East Anglia and the College of Engineering, Mathematics ... comes ahead of the New York Climate Summit, where world ...
(Date:9/21/2014)... In recent years, new strains of bacteria have emerged ... these superbugs, including drug-resistant forms of tuberculosis and staphylococcus, ... at least 23,000. Despite the urgent need for new ... antibiotics in the past decade. , MIT engineers have ... Using a gene-editing system that can disable any target ...
(Date:9/21/2014)... MA -- Shellfish such as mussels and barnacles secrete ... or ship hulls, even underwater. Inspired by these natural ... materials that could be used to repair ships or ... their new waterproof adhesives, the MIT researchers engineered bacteria ... mussel proteins as well as a bacterial protein found ...
Breaking Biology News(10 mins):CO2 emissions set to reach new 40 billion ton record high in 2014 2CO2 emissions set to reach new 40 billion ton record high in 2014 3Battling superbugs 2Battling superbugs 3Battling superbugs 4Engineered proteins stick like glue -- even in water 2Engineered proteins stick like glue -- even in water 3
... Men with type 1 diabetes may be able ... tissue, say Georgetown University Medical Center (GUMC) researchers who ... Cell Biology 50th annual meeting in Philadelphia. Their laboratory ... human spermatogonial stem cells (SSCs) extracted from testicular tissue ...
... ANTONIO Do not delay treatment of breast cancer just ... Dr. med, of the German Breast Group. This suggestion ... treatment options on the infant. Loibl presented this data at ... Dec. 8-12, 2010. "At the time we started the ...
... the trail of some of the most economically damaging organisms ... water fungus that causes powdery mildew and the water molds ... mildew in cruciferous vegetables and other crops. , "We have ... Professor Sophien Kamoun, head of the Sainsbury Laboratory on the ...
Cached Biology News:'Grow your own transplant' may be possible for men with type 1 diabetes 2Unique needs and outcomes of pregnant women with breast cancer identified 2Gene hunters tackle crop diseases 2
... Ambions 96 well Magnetic-Ring Stand is ... 96 well U-bottom microplates. The stand has ... 96 well microtiter plate footprint. The use ... enables fast and easy magnetic separation. With ...
... from Thermus aquaticus expressed in E. coli; ... of 250 units enzyme/tube and Buffer I ... the same enzyme as AmpliTaq DNA Polymerase ... separation process to ensure that contaminating bacterial ...
Recombinant DNA polymerase from Thermus aquaticus expressed in E. coli; 5 units/L; 1 tube of 1, 000 units enzyme/tube w/Buffer II and MgCl2...
... is a versatile and easy-to use enzyme, ... GCpro Taq DNA Polymerase is prepared from ... containing the DNA polymerase I gene from ... processive 5'-3' DNA polymerase activity. Its inherent ...
Biology Products: