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Topic Area: Nanotech/Environment, Health
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Displaying records 31 to 40 of 49 records.
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31. 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

32. Clarification of the potential for aqueous fullerene nanoscale aggregates (nC60) to generate reactive oxygen species and cause toxicity in fish
Topic: Nanotech/Environment, Health & Safety
Published: 6/28/2011
Authors: Theordore Henry, Elijah J Petersen, Robert Compton
Abstract: This review aims to clarify inconsistencies in previous reports regarding the potential for aqueous nanoscale aggregates of fullerenes (nC60) to generate reactive oxygen species (ROS) and cause toxicity in fish. Methods for evaluation of ROS product ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907705

33. Highly selective GaN-nanowire/TiO2-nanocluster hybrid sensors for detection of benzene and related environment pollutants
Topic: Nanotech/Environment, Health & Safety
Published: 6/15/2011
Author: Norman A Sanford
Abstract: Nanowire‹nanocluster hybrid chemical sensors were realized by functionalizing gallium nitride (GaN) nanowires (NWs) with titanium dioxide (TiO2) nanoclusters for selectively sensing benzene and other related aromatic compounds. Hybrid sensor device ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909995

34. Persistence of Singly Dispersed Silver Nanoparticles in Natural Freshwaters, Synthetic Seawater, and Simulated Estuarine Waters
Topic: Nanotech/Environment, Health & Safety
Published: 4/28/2011
Authors: Stephanie L Chinnapongse, Robert I. MacCuspie, Vincent A Hackley
Abstract: The use of silver nanoparticles (AgNPs) in consumer products has become increasingly widespread over the past decade. These products are being used and distributed world-wide, creating a risk of AgNPs flowing into rivers and oceans via wastewater. Th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906824

35. 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

36. Effects of Polyethyleneimine-Mediated Functionalization of Multi-Walled Carbon Nanotubes on Earthworm Bioaccumulation and Sorption by Soils
Topic: Nanotech/Environment, Health & Safety
Published: 3/24/2011
Authors: Elijah J Petersen, Roger A Pinto, Liwen Zheng, Qingguo Huang, Peter E Landrum, Walter J. Weber
Abstract: Carbon nanotubes (CNTs) are often modified for their different intended application potentials to enhance their aqueous stability or change properties such as their surface charge. Such changes may also profoundly impact their environmental behavior ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905634

37. Challenges for Physical Characterization of Silver Nanoparticles Under Pristine and Environmentally Relevant Conditions
Topic: Nanotech/Environment, Health & Safety
Published: 3/17/2011
Authors: Robert I. MacCuspie, Kim Rogers, Manomita Patra, Zhiyong Suo, Andrew John Allen, Matthew N. Martin, Vincent A Hackley
Abstract: The conditions used to disperse silver nanoparticles (AgNPs) strongly impact their resulting size measurements and agglomeration state, based on the underlying metrology and physical chemistry, respectively. A series of AgNP materials with reported ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907651

38. Dispersion Stability of Nanoparticles in Ecotoxicological Investigations: A Comparison of Different Techniques
Topic: Nanotech/Environment, Health & Safety
Published: 2/26/2011
Authors: Ratna Tantra, Shingheng Jing, Siva Kaliyappan, Nicholas Walker, James Noble, Vincent A Hackley
Abstract: One of the main challenges in nanoecotoxicological investigations is in the selection of the most suitable measurement methods and protocols for nanoparticle characterisation. Several parameters have been identified as being important as they govern ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906180

39. 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

40. Phase Distribution of 14C-labeled Multi-walled Carbon Nanotubes in Aqueous Systems Containing Model Solids: Peat
Topic: Nanotech/Environment, Health & Safety
Published: 1/11/2011
Authors: Elijah J Petersen, Liwen Zhang, Qingguo Huang
Abstract: Understanding the sorption interactions between nanoparticles and soils or sediments is a critical factor in determining their fate in environmental systems. As such, we examined the interactions of 14C-labeled multi-walled carbon nanotubes (MWNTs) ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905639



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