Navigation Links
The perfect nanocube: Precise control of size, shape and composition
Date:9/1/2010

With growing interest in using nanoparticles for everything from antibacterial socks to medical imaging to electronic devices, the need to understand the environmental, health and safety risks of these particles also grows. Researchers at the National Institute of Standards and Technology (NIST) have developed a simple process for producing nanocrystals that will enable studies of certain physical and chemical properties that affect how nanoparticles interact with the world around them.

Because nanoparticles behave differently from bulk samples of the same material, new tests to understand how they affect biological systems must be developed. Toxicologists determine the hazards posed by nanoparticles by introducing them to a biological system and monitoring the effects, but they currently lack a set of control particles whose size, shape and composition have been carefully produced and characterized.

In a recent paper published in Angewandte Chemie,* NIST scientists describe a one-step process that allows them to control the size, shape and composition of gold-copper alloy nanocrystals to create perfect-edged nanocubes as small as 3.4 nanometersjust half the thickness of a cell wall and on the same size range as DNA.

The researchers combined and heated gold and copper precursors with other chemicals to produce highly crystalline, homogeneous, perfect nanocubes with abundant yield. To study the formation process, they removed samples at 1 hour, 1.5 hours, 5 hours, and 24 hours and found that just five hours were needed to produce perfectly cubic nanoparticles of uniform size. By adjusting the ratios of the chemicals in the original solution and the reaction time, they were able to precisely control the size, shape and composition of the nanocubes. This process is unique in allowing control of the ratio of copper to gold atoms within the nanocube to either 3:1 or 1:3.

"It's a simple process, and to the best of our
'/>"/>

Contact: Jennifer Huergo
jennifer.huergo@nist.gov
301-975-6343
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Solar power game-changer: Near perfect absorption of sunlight, from all angles
2. Nikon Instruments Perfect Focus System Wins Second Place in The Scientists Top Innovations of 2008 Award
3. Practice makes perfect -- motor memory possible for neuroprosthetic control
4. Ohio Executive Shares Why Ohio is the Perfect Location for Bioscience Business in National Ad Campaign
5. £4.9 million to develop metamaterials for invisibility cloaks and perfect lenses
6. Varian Medical Systems Exhibits a New Version of RapidArc(TM) Radiotherapy Technology and Other Products for Fast, Precise Cancer Treatment
7. Trinitas Comprehensive Cancer Center Now Offering Cancer Patients Faster, Ultra-Precise Radiation Using New RapidArc Technology
8. Dow AgroSciences Confirms Efficacy of Zinc Finger Nucleases for Precise Genome Modification in Maize
9. New Pre-Clinical Data on OmniGuides BeamPath NEURO(TM) Demonstrates Precise Cutting in Brain Tissue
10. SmartGenes Services for Faster, More Precise Identification of Bacteria and Fungi to be Used by The Johns Hopkins Hospital
11. NISTs second quantum logic clock based on aluminum ion is now worlds most precise clock
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The perfect nanocube: Precise control of size, shape and composition
(Date:11/22/2014)... , Nov. 21, 2014  The element of ... emerging diseases, i.e., they strike without warning. Until now, ... warning of a viral outbreak, resulting in suboptimal responses ... Ebola currently. Photo - http://photos.prnewswire.com/prnh/20141121/160242 ... has now been removed because virus gene structural changes ...
(Date:11/21/2014)... , Todd Martensen ... Mariano Rodríguez es elegid vicepresidente senior de desarrollo empresarial ... en marcha para comenzar de forma rápida la comercialización de ... aprobación en Europa   , KLOX ... los siguientes nombramientos: Todd Martensen ha ...
(Date:11/21/2014)... November 19, 2014 The science of ... was shared with more than 200 primary students in ... from the University of Otago Physics Department and funded ... Otago students, members of the university’s OSA/SPIE Student Chapter ... early September, giving children from small, rural schools hands-on ...
(Date:11/21/2014)... Angeles, CA (PRWEB) November 20, 2014 ... “A Short Walk to the Other Side” published ... an “Award-Winning Finalist in the “Fiction: Short Story” category ... , Jeffrey Keen, President and CEO of USA Book ... from mainstream and independent publishers, including Simon & Schuster, ...
Breaking Biology Technology:Viruses' Advantage of Surprise is Lost 2KLOX Technologies anuncia sus nombramientos ejecutivos 2KLOX Technologies anuncia sus nombramientos ejecutivos 3KLOX Technologies anuncia sus nombramientos ejecutivos 4KLOX Technologies anuncia sus nombramientos ejecutivos 5Optics and photonics outreach programs share science, spark fascination with light 2Optics and photonics outreach programs share science, spark fascination with light 3Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 2Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 3Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 4
... TECH ) consolidated net earnings for the quarter ended ... per diluted share compared with $24.7 million or $0.66 per ... increase in consolidated net earnings for the quarter resulted from ... due to the renewal of the U.S. research and development ...
... ground terminals could become relics of the past thanks ... Agency (ESA) by Queen,s University Belfast,s Institute of Electronics, ... self-aligning flat antennas. It is hoped the work ... be optimised for a variety of technologies presently used ...
... BioStorage Technologies, a global leader in scientific ... for the bioscience industry, will host a half-day ... in San Francisco on April 11, 2011. ... bring together industry thought leaders to discuss new ...
Cached Biology Technology:Techne Corporation Releases Unaudited Second Quarter Results for Fiscal Year 2011 2Techne Corporation Releases Unaudited Second Quarter Results for Fiscal Year 2011 3Techne Corporation Releases Unaudited Second Quarter Results for Fiscal Year 2011 4Techne Corporation Releases Unaudited Second Quarter Results for Fiscal Year 2011 5Techne Corporation Releases Unaudited Second Quarter Results for Fiscal Year 2011 6Techne Corporation Releases Unaudited Second Quarter Results for Fiscal Year 2011 7Space Agency investigates novel analog self-steered antennas 2BioStorage Technologies to Host Global Sample Management Benchmarking Symposium in Conjunction with Biorepositories Asia Conference 2BioStorage Technologies to Host Global Sample Management Benchmarking Symposium in Conjunction with Biorepositories Asia Conference 3
(Date:11/18/2014)... 17, 2014   News Highlights: ... to develop The Partners Data Lake, an agile ... Data Lake will allow researcher and clinicians to ... and the lives of patients , The ... activities across the Partners system, breaking down physical ...
(Date:11/12/2014)... Fla. , Nov. 12, 2014 Crossmatch™, ... today that its U.are.U ® fingerprint readers have ... chain in Central Mexico . The ... 2014 to eliminate payroll issues caused by employees clocking ... installing the U.are.U fingerprint readers, Montparnasse relied on paper ...
(Date:11/7/2014)... , Nov. 7, 2014  In conjunction with the ... Police Departments, The Community Foundation of the Verdugos has announced ... DNA JUSTICE PROJECT," a $250,000 initiative to keep the Verdugo ... In its first six months of existence, the Lab has ... support for local law enforcement. "Because our number ...
Breaking Biology News(10 mins):Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 2Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 3Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 5Montparnasse Pasteleria Achieves Time and Attendance Transparency with Crossmatch U.are.U Fingerprint Readers 2Community Foundation Of The Verdugos Unveils Campaign To Fund Glendale-Burbank DNA Justice Project 2
... in the Houston area with an added element: the ... U.S. Department of Education has awarded a $2.6 million, ... Center,s Children,s Learning Institute (CLI) to combine two programs ... for kindergarten. The two research-proven programs are ...
... how changes to a frog,s immune system may be the ... populations across the UK. Communities of common frogs ... which is estimated to be killing tens of thousands of ... ponds, the surrounding lawn becomes strewn with dead frogs, some ...
... surrounds cells of the Clostridium difficile superbug, and ... and tissues, is revealed in part in the 1 March ... that unravelling the secrets of this protective layer,s molecular structure ... C. difficile infections. The ,jacket, is a surface ...
Cached Biology News:Study to evaluate success of parental involvement in early childhood education 2Frog's immune system is key in fight against killer virus 2Scientists unlock the secrets of C. difficile's protective shell 2
Ms anti-Cyclophilin D...
...
Protein Kinase D2 Immunogen: Human protein kinase D2. Storage: -20 C, Avoid Freeze/Thaw Cycles...
Mouse GM CSF Construction Kit provides antigen affinity purified polyclonal capture and tracer antibodies, and antigen standard for development of approximately ten microplate assays....
Biology Products: