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Topic Area: Nanotech/Environment, Health
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Displaying records 31 to 40 of 47 records.
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31. 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

32. 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

33. 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

34. 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

35. 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

36. 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

37. 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

38. 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

39. 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

40. Influence of Polyethyleneimine Graftings of Multi-Walled Carbon Nanotubes on Their Accumulation and Elimination by and Toxicity to Daphnia magna
Topic: Nanotech/Environment, Health & Safety
Published: 12/23/2010
Authors: Elijah J Petersen, Roger A Pinto, Danielle J Mai, Peter E Landrum, Walter J. Weber
Abstract: Carbon nanotubes (CNTs) are often modified for different intended applications which often changes the nanotubes‰ physicochemical properties, such as surface charge. Assessing the extent to which such modifications to carbon nanotubes influence thei ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906209



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