Navigation Links
Engineering nanoparticles for maximum strength
Date:10/20/2008

at that point.

These local strengths were combined to model the behavior of the whole sphere, a process called finite element analysis, or FEA. When simulated by a computer, the strain at each point in a sphere of specific dimensions, subjected to the applied compression, could be calculated and visualized. The simulations revealed that as displacement increased, the sphere's shape served to transfer stress to certain regions experiencing maximum shear regions corresponding to the top and bottom of the sphere where it contacted the substrate and the diamond anvil. This is where the spheres were usually observed to fail in the actual experiments. Indeed, the experimental results generally followed the predictions of the FEA model.

"The model incorporates the actual experimental conditions as well as possible," says Minor, "including the 'glue' we use to hold the nanosphere on the substrate. This is just a little of the carbonaceous material left over from the chemical process used to create the cadmium sulfide nanospheres. Originally we cleaned this away, but after we experienced a couple of instances of the spheres slipping away when they were squeezed, we stopped cleaning them so they would stay attached to the surface. The FEA model had to take this carbonaceous material into account."

The FEA model showed that the stresses within the FEA model at the point of fracture were indeed quite high. For example, a nanosphere 450 nanometers in diameter with a shell about 69 nanometers thick, deformed by compression to some eight percent of its original diameter, experiences local shear stresses approaching the ideal shear strength of cadmium sulfide. A 'fracture criterion,' derived by the researchers from their model, accurately predicts that a typical nanosphere experiences some 70 percent of the ideal shear strength at its point of failure.

"These are the most complete analyses of the mechanical properties of single nanoparticle
'/>"/>

Contact: Paul Preuss
paul_preuss@lbl.gov
510-486-6249
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Genstruct Expands Team with New VP of Engineering
2. Genetic Engineering & Biotechnology News reports on growing role of molecular diagnostics
3. NSF awards 14 materials research science and engineering centers
4. Online Systems Engineering Master's Program Attracts Engineers from Fortune 500 Firms
5. American Oriental Bioengineering Announces Participation in September Investor Conferences
6. American Oriental Bioengineering, Inc. to Report Second Quarter 2008 Financial Results
7. Christopher Kurtz Joins Alexza Pharmaceuticals as Vice President, Global Supply Chain and Sustainment Engineering
8. Genetic Engineering & Biotechnology News reports on novel hit-to-lead drug discovery
9. Pittsburgh Region Middle School Students Participate in Hands-on Tissue Engineering Summer Camp
10. American Oriental Bioengineering Proposes Offering of $85 Million of Convertible Notes
11. Touch Bionics wins the 2008 MacRobert Award - i-LIMB Hand recognised as the leading engineering innovation of the year
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Engineering nanoparticles for maximum strength
(Date:4/16/2015)... (PRWEB) April 16, 2015 ... data solutions driven by Semantic Web technology, and ... specialist information and services for the academic and ... that its joint solution ‘Smart Data Lake for ... finalist for the 2015 Bio-IT ‘Best of Show’ ...
(Date:4/16/2015)... (PRWEB) April 16, 2015 Regis Technologies ... American Association for Cancer Research (AACR) annual meeting. Regis ... Convention Center, starting Saturday, April 18, in Philadelphia and ... claim to title of the oldest and largest organization ... fellowships and grants, and partners with survivors to promote ...
(Date:4/16/2015)... /PRNewswire/ - Portage Biotech Inc. ("Portage" or "the Company" ... pleased to announce that the Company will be presenting ... to be held in London, UK ... Mr. James Mellon , a director of Portage, ... key programs at its subsidiaries, Portage Pharmaceuticals Ltd. ("PPL"), ...
(Date:4/16/2015)... , April 16, 2015  AnaptysBio, Inc., ... of therapeutic antibodies, today announced the advancement ... program into IND-enabling studies. The Company,s anti-IL-36R ... treatment for generalized pustular psoriasis (GPP), an ... medical need. ANB019 is wholly owned within AnaptysBio,s ...
Breaking Biology Technology:Cambridge Semantics and Informa Named Bio-IT Award Finalist for Smart Data Lake Solution for Clinical Trial and Competitive Intelligence 2Cambridge Semantics and Informa Named Bio-IT Award Finalist for Smart Data Lake Solution for Clinical Trial and Competitive Intelligence 3Regis Technologies Joins American Association for Cancer Research Annual Meeting 2Portage to Present at Master Investor 2015 in London, UK 2Portage to Present at Master Investor 2015 in London, UK 3Portage to Present at Master Investor 2015 in London, UK 4AnaptysBio Advances First-In-Class Anti-IL-36 Receptor Antibody Program To Treat Orphan Inflammatory Disease 2
... with its goal of extending electronic government and ... how such a massive undertaking can take place ... sharing information and integrating systems has been clear ... , ,What has been missing is the organizational ...
... carefully established position as a nexus for research and development ... academic and other research institutions, according to a new report. ... This prediction comes from the Wisconsin Technology Council ... report, titled The Economic Value of Academic Research and Development ...
... Institutes of Health. Madison, Wis. ... Wednesday that it will receive a $1.26 million Phase II ... Health. , ,The funds will be used to help produce ... disorder that kills red blood cells. This results in a ...
Cached Biology Technology:State CIO wants to unify electronic government 2State CIO wants to unify electronic government 3State CIO wants to unify electronic government 4Economic report raises red flags on Wisconsin's future 2Economic report raises red flags on Wisconsin's future 3Mirus receives $1.26 million SBIR grant to combat anemia 2
(Date:4/10/2015)... Research and Markets ( http://www.researchandmarkets.com/research/cjk4gb/security ) has ... - NEC" report to their offering. ... to supply a range of IT security management and ... on the development of a Big Data and cloud ... Asia-Pacific region is a core ...
(Date:4/2/2015)... HAMBURG, Germany , April 2, 2015 /PRNewswire/ ... ten fingerprint tests DERMALOG by far outperforms the ... While always maintaining high accuracy, the system is ... second. Hence, the speed proves up to be ... 40% faster than its runner-up performance. ...
(Date:4/1/2015)... OXFORD, Conn. , Apr. 1, 2015  NXT-ID, ... a biometric authentication company focused on the growing mobile ... number of Wocket smart wallets is underway to early ... early access group includes usage at retail outlets including ... CVS Pharmacy. Users report Wocket was accepted at all ...
Breaking Biology News(10 mins):NEC Security Competitive Profile 2015 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 3NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 2NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 3NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 4
... assumed that if mercury is high and increasing in fish ... true of fish elsewhere in the Arctic. But a ... discovered that assumption is wrong in much of the continental ... a result of diverse atmospheric, geological, and biological conditions, "It ...
... developed a new vaccine that protects against lethal pneumonia ... drug-resistant strains like MRSA. The research team was ... in the UI Carver College of Medicine. The findings ... Infectious Disease . The new vaccine targets toxins ...
... , a sprawling shrub that grows on just a single ... in its family and genus. It is also one of ... 200 million years ago. Now, researchers from Indiana University, with ... Penn State University, and the Institute of Research for Development ...
Cached Biology News:Virginia Tech research overturns assumption about mercury in the Arctic 2Virginia Tech research overturns assumption about mercury in the Arctic 3Staph stoppers 2A gluttonous plant reveals how its cellular power plant devours foreign DNA 2A gluttonous plant reveals how its cellular power plant devours foreign DNA 3
...
... The Luminex 200 IS System is ideal ... Upstate's Beadlyte reagents. This system contains the ... developed by Luminex. The user can design ... kits. The system has fully integrated graphing ...
... Quality ISO 9001:2000 Certified USDA Research ... Validated, SOP's Training AALAS Certified ... All Procedures GLP Documentation Upon Request ... shopping point for all your custom immunology ...
... Re-Blot Western Blot Recycling Kit is ... Western blots that have been developed ... other isotopes. It is not recommended ... 4-chloronapthol, etc.), as it is not ...
Biology Products: