Navigation Links
NIST scientists gain new 'core' understanding of nanoparticles
Date:5/27/2010

While attempting to solve one mystery about iron oxide-based nanoparticles, a research team working at the National Institute of Standards and Technology (NIST) stumbled upon another one. But once its implications are understood, their discovery* may give nanotechnologists a new and useful tool.

The nanoparticles in question are spheres of magnetite so tiny that a few thousand of them lined up would stretch a hair's width, and they have potential uses both as the basis of better data storage systems and in biological applications such as hyperthermia treatment for cancer. A key to all these applications is a full understanding of how large numbers of the particles interact magnetically with one another across relatively large distances so that scientists can manipulate them with magnetism.

"It's been known for a long time that a big chunk of magnetite has greater magnetic 'moment'think of it as magnetic strengththan an equivalent mass of nanoparticles," says Kathryn Krycka, a researcher at the NIST Center for Neutron Research. "No one really knows why, though. We decided to probe the particles with beams of low-energy neutrons, which can tell you a great deal about a material's internal structure."

The team applied a magnetic field to nanocrystals composed of 9 nm-wide particles, made by collaborators at Carnegie Mellon University. The field caused the particles to line up like iron filings on a piece of paper held above a bar magnet. But when the team looked closer using the neutron beam, what they saw revealed a level of complexity never seen before.

"When the field is applied, the inner 7 nm-wide 'core' orients itself along the field's north and south poles, just like large iron filings would," Krycka says. "But the outer 1 nm 'shell' of each nanoparticle behaves differently. It also develops a moment, but pointed at right angles to that of the core."

In a word, bizarre. But potentially useful.

The sh
'/>"/>

Contact: Chad Boutin
boutin@nist.gov
301-975-4261
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Page: 1 2

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
NIST scientists gain new 'core' understanding of nanoparticles
(Date:4/17/2014)... Double-stapled peptide inhibits RSV infection , Respiratory ... lower respiratory tract infections, generating life-threating illness in ... preventive therapies are limited. RSV enters host cells ... a six-helix fusogenic bundle. Small interfering peptides that ... however, these peptides are highly susceptible to degradation. ...
(Date:4/17/2014)... Rochelle, NY, April 17, 2014The development of stem cell ... the ability to characterize stem cell populations based on ... have discovered a new marker that is highly expressed ... umbilical cord blood, which they describe in an article ... from Mary Ann Liebert, Inc., publishers. The article is ...
(Date:4/17/2014)... study suggests that fish consumption advisories for expecting ... long-lived contaminants like persistent organic pollutants (POPs). ... researchers including University of Toronto Scarborough PhD student ... how different levels of environmental contamination, a mother,s ... in the body influenced exposure in her children. ...
Breaking Biology News(10 mins):JCI online ahead of print table of contents for April 17, 2014 2JCI online ahead of print table of contents for April 17, 2014 3JCI online ahead of print table of contents for April 17, 2014 4JCI online ahead of print table of contents for April 17, 2014 5JCI online ahead of print table of contents for April 17, 2014 6Fish consumption advisories fail to cover all types of contaminants 2
... -- The biobanking market presents the largest of all opportunities ... specific diseases. The global market for biobanking was ... 30% between 2010 and 2015, at a compound annual growth ... greatest increase with growth of 64%, at a 5-year CAGR ...
... recalcitrance--the problem of how to break down complex ... fermented to produce sustainable biofuels and other renewable ... biomass characterization. IB IN-DEPTH, a collection of articles ... techniques for analyzing the chemistry, structure, and interaction ...
... 2012  Jeff Crandall, Nancy and Neal Wade Professor ... of Virginia, was honored with the SAE International ... the SAE 2012 World Congress held in Detroit. ... recognizes individuals whose accomplishments include outstanding international research, ...
Cached Biology News:Global Biobanking Market Projected to Increase by 30% to Reach $183 Billion by 2015 2Global Biobanking Market Projected to Increase by 30% to Reach $183 Billion by 2015 3Biomass characterization technology research highlighted in Industrial Biotechnology journal 2Jeff Crandall Honored With SAE International Arnold W. Siegel International Transportation Safety Award 2
(Date:1/15/2014)... Reston, VA (PRWEB) January 15, 2014 ... education have continued their sponsorship of an annual competition ... interest in, and access to, innovative STEM study. The ... , TEAMS: Tests of Engineering Aptitude, Mathematics, and ...
(Date:1/15/2014)... AudioNotch is the internet's leading provider of Notched Sound ... Patients listen to sound therapy that is tailor-made for ... to months, their tinnitus volume decreases. , AudioNotch has previously ... Notched White Noise. Now, AudioNotch is pleased to announce to ...
(Date:1/14/2014)...  3D Communications, a leading provider of strategic communications services to corporations ... in the United States and ... , JD, is returning to the firm,s Washington, D.C. ... after more than two years of service as Associate Commissioner for ...
(Date:1/14/2014)... iLab Solutions, the leader in core facility ... of Product Strategy. In this role, Michelle will work with ... guide in the development of iLab products. Her main goal ... benefit to the scientific community by offering the most advanced, ...
Breaking Biology Technology:Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5Former FDA Associate Commissioner Returns To 3D Communications 2iLab Solutions Announces Michelle Detwiler as the New Director of Product Strategy 2
... PRINCETON, N.J., July 28 Laureate Pharma, Inc., ... announced the appointment of Daniel E. Leone as Vice ... for Laureate,s worldwide business development activities, including sales and ... development, manufacturing, and bioprocessing business. , , ...
... , , DOYLESTOWN, ... has become the first company to offer a broad range of ... medical device and biotech clinical trials. , , ... Reader and Investigator Training Institute (BRITI)(TM). RadMD is partnering with International ...
... , CINCINNATI, July 27 Kendle (Nasdaq: ... today appointed Stephen Cutler, PhD, as the Company,s new Senior ... Cutler brings to Kendle more than 20 years of senior ... industries to position the Company for continued growth as a ...
Cached Biology Technology:Laureate Pharma Appoints Daniel E. Leone as Vice President of Business Development 2RadMD First to Offer CME-Certified Education and Training For Medical Imaging in Clinical Trials 2Kendle Appoints Stephen Cutler, PhD Senior Vice President and Chief Operating Officer 2Kendle Appoints Stephen Cutler, PhD Senior Vice President and Chief Operating Officer 3
Ms anti-Cyclophilin D...
Protein Kinase D2 Immunogen: Human protein kinase D2. Storage: -20 C, Avoid Freeze/Thaw Cycles...
Request Info...
Immunogen: Recombinant rabbit tryptophan hydroxylase, isolated as inclusion bodies from E. coli and purified by preparative SDS-PAGE. Storage: -20 C, Avoid Freeze/Thaw Cycles...
Biology Products: