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:1/22/2015)... 2015  Transwestern | RBJ today announces the firm brokered a ... Shire a leading biopharmaceutical company, at Two Ledgemont Center in ... Robert Richards , president, and Brian Cohen , senior ... five-floor building at 95 Hayden Ave. Photo - ...
(Date:1/22/2015)... January 21, 2015 Cambridge Semantics, the leading ... today announced that 2014 was a record-breaking year across the ... of the Anzo Smart Data Platform and our Smart Data ... insights from diverse data which led to record growth for ...
(Date:1/22/2015)... (PRWEB) January 22, 2015 Crystal Diagnostics (CDx) ... that it has received AOAC-PTM Certifications for the six non-O157 ... and O145; collectively referred to as STEC or the “Big-6”) ... colony forming unit (cfu) per 325 g of raw ground ...
(Date:1/22/2015)... (PRWEB) January 22, 2015 Dr. Greg Leyer ... 12th annual Scripps Natural Supplements Pre-Conference seminar on probiotics in ... is an annual continuing education conference for health care professionals. ... included the topic of probiotics in health. Dr. Leyer spoke ...
Breaking Biology Technology:Transwestern | RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Cambridge Semantics Announces Record Results for 2014 2Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 2
... , ... new benchtop fermentor and cell culture,bioreactor system has been developed, ... by,integrating data from up to 11 external devices*. This means,that ... and so on, can be directly added and,cascaded with existing ...
... , ... , This Application ... appropriate,vessels and control modules, the BioFlo 110 can be used to efficiently grow mammalian ... For this report, a standard 7.5L BioFlo 110 Advanced ...
... , ... a PVDF membrane utilizing the microdispensing function of a chemical printer ... trap MS in conjunction with the chemical printer enables MS analysis ... Protein spots from E. coli separated by 2-dimensional electrophoresis were ...
Cached Biology Technology:Optimizing Your Benchscale Fermentation Process 2Optimizing Your Benchscale Fermentation Process 3E. coli Fermentation Using a BioFlo 110 Bench-Top Fermentor 2E. coli Fermentation Using a BioFlo 110 Bench-Top Fermentor 3E. coli Fermentation Using a BioFlo 110 Bench-Top Fermentor 4E. coli Fermentation Using a BioFlo 110 Bench-Top Fermentor 5E. coli Fermentation Using a BioFlo 110 Bench-Top Fermentor 6Direct On-Membrane MS/MS Analysis using the Chemical Printer (CHIP-1000) and AXIMA-QIT 2
(Date:12/19/2014)... , Dec. 18, 2014 Research and Markets ... "Micro Market Monitor: North America Perimeter Security Systems Market" ... The North American perimeter security market is ... to 2019. Although the U.S. market holds a larger share ...
(Date:12/17/2014)... NEW YORK , Dec. 15, 2014  HITLAB SM ... Practices (GCP) audit to confirm its adherence to current ... enables HITLAB to conduct regulated smart device and smart ... safety and research quality. "HITLAB is determined ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the addition of ...  report to their offering. One major ... With continuous advances in technology, it is important to ...
Breaking Biology News(10 mins):Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... New research shows that microRNA-486 is a potent ... helps regulate the proliferation and migration of lung-cancer cells, ... in those cells. The preclinical study was led ... Center Arthur G. James Cancer Hospital and Richard ...
... GA--As water use and runoff regulations become more stringent ... an issue, finding ways to increase the efficiency of ... study contains answers that can help horticultural growers address ... the research study, explained that most often horticultural best ...
... an internationally recognised diabetes expert. He heads the Institute ... Mnchen and is the scientific director of the Helmholtz ... holds the Chair of Metabolic Diseases at the Technische ... molecular foundations of the control of fat and sugar ...
Cached Biology News:MicroRNA molecule found to be a potent tumor-suppressor in lung cancer 2Sensors allow for efficient irrigation, give growers more control over plant growth 2
...
...
... Monoclonal Anti-β-Tubulin IV Recognizes an ... sequence of β-tubulin isotype IV. ... isotypes is observed. ascites fluid ... C-terminal sequence of β-tubulin isotype ...
... The Finnpipette BioControl is a major ... A complete liquid handling system - ... interchangeable tip cone modules. All five ... cone modules fit one handle. The ...
Biology Products: