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Displaying records 11 to 20 of 22 records.
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11. Nanoscale Reference Materials for Environmental, Health, and Safety Measurements: Needs, Gaps, and Opportunities
Topic: Nanotech/Environment, Health & Safety
Published: 11/7/2012
Authors: Aleksandr B. Stefaniak, Vincent A Hackley, Gert Roebben, Kensei Ehara, Steve Hankin, Michael T Postek, Iseult Lynch, Wei-En Fu, Thomas P.J. Linsinger, Andreas Th?nemann
Abstract: There is a need to understand and manage potential risks posed to workers, the public, and the environment from exposure to engineered nanomaterials. In response, several organizations have developed lists of relevant nano-objects and of physico-che ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910519

12. Aggregation/agglomeration state of carbon nanotubes
Topic: Nanotech/Environment, Health & Safety
Published: 10/12/2012
Authors: Vivek M Prabhu, Toshiya Okazaki, Takeshi Eitoku, Masayoshi Tange, Haruhisa Kato
Abstract: Evaluation of aggregation and agglomeration of carbon nanotube (CNT) solution has been one of the key issues for applications. Here we introduce a simple method based on depolarized dynamic light scattering (DDLS) performed at multiple scattering ang ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912177

13. UV-induced photochemical transformations of citrate capped silver nanoparticle suspensions
Topic: Nanotech/Environment, Health & Safety
Published: 9/14/2012
Authors: Justin M Gorham, Robert I. MacCuspie, Kate L Klein, D Howard Fairbrother, Richard D Holbrook
Abstract: Due to the increasing use of silver nanoparticles (AgNPs) in consumer products, it is essential to understand how variables, such as light exposure, may change the physical and chemical characteristics of AgNP suspensions. To this end, the effect o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911250

14. Summary Report of Research on TiO2 Nanomaterial
Topic: Nanotech/Environment, Health & Safety
Published: 8/3/2012
Author: Vincent A Hackley
Abstract: Report summarizes study whose purpose was to optimize and validate a standardized and reproducible approach for the preparation of TiO2 nanoparticle dispersions in relevant biological and environmental test media, using an industrially relevant powde ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912219

15. Photo-induced Surface Transformation of Silica Nanocomposites
Topic: Nanotech/Environment, Health & Safety
Published: 6/22/2012
Authors: Justin M Gorham, Tinh Nguyen, Coralie Bernard, Deborah L Stanley, Richard D Holbrook
Abstract: The physicochemical, UV-induced surface modifications to silica nanoparticle (SiNP) - epoxy composites have been investigated. The silica nanocomposites (SiNCs) were prepared using a two-part epoxy system with 10 % mass fraction of SiNPs and expose ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910637

16. Does Shape Matter? Bioeffects of Gold Nanomaterials in a Human Skin Cell Model
Topic: Nanotech/Environment, Health & Safety
Published: 1/13/2012
Authors: Nicole M Schaeublin, Laura K Braydich-Stolle, Elizabeth I Maurer, Kyoungweon Park, Robert I. MacCuspie, A R M Nabiul Afrooz, Navid B Saleh, R.A. Vaia, Saber Hussain
Abstract: Gold nanomaterials (AuNMs) have distinctive electronic and optical properties, making them ideal candidates for biological, medical, and defense applications. Therefore, it is imperative to evaluate the potential biological impact of AuNMs before em ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909150

17. Report on an Interlaboratory Study for the Measurement of BET-Specific Surface Area using an Industrially Relevant TiO2 Nanopowder
Topic: Nanotech/Environment, Health & Safety
Published: 8/3/2011
Author: Vincent A Hackley
Abstract: This report summarizes the findings of an interlaboratory study (ILS) conducted in 2009-2010 under the auspices of the Versailles Project on Advanced Materials and Standards (VAMAS) Technical Working Area (TWA) 34 (Nanoparticle Populations). The stat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908638

18. Humic Acid-Mediated Silver Nanoparticle Formation Under Environmentally Relevant Conditions
Topic: Nanotech/Environment, Health & Safety
Published: 4/1/2011
Authors: Nelson Akaighe, Robert I. MacCuspie, Divina A Navarro, Diana S Aga, Sarbajit Banerjee, Mary Sohn, Virender K Sharma
Abstract: The formation of silver nanoparticles (AgNPs) via reduction of silver ions (Ag+) in the presence of humic acids (HAs) under various environmentally relevant conditions is described. HAs tested were from Suwannee River (SUW), and samples of three se ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907224

19. PREPARATION OF A NANOSCALE TiO2 AQUEOUS DISPERSION FOR TOXICOLOGICAL OR ENVIRONMENTAL TESTING
Topic: Nanotech/Environment, Health & Safety
Published: 1/24/2011
Authors: Julian S. Taurozzi, Vincent A Hackley
Abstract: This work prescribes the preparation of a P25 nanoparticle dispersion in high purity deionized water, as a first step towards the preparation of nanoscale P25 dispersions in relevant biological and environmental matrices. This protocol should be used ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907260

20. Colloidal Stability of Silver Nanoparticles in Biologically Relevant Conditions
Topic: Nanotech/Environment, Health & Safety
Published: 12/30/2010
Author: Robert I. MacCuspie
Abstract: Understanding the colloidal stability of nanoparticles may play a key role in interpretation of toxicological experiments, in determining if single nanoparticles or their aggregates provided the dominant result. This report examines a variety of ins ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903738



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