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1. 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 ...

2. Anisotropic surface-state-mediated RKKY interaction between adatoms
Topic: Nanotech/Environment, Health & Safety
Published: 1/18/2012
Authors: Paul N. Patrone, T L Einstein
Abstract: Motivated by recent numerical studies of Ag on Pt(111), we derive a far-field expression for the RKKY interaction mediated by surface states on a (111) FCC surface. The main contribution to the interaction comes from electrons whose Fermi velocity ...

Topic: Nanotech/Environment, Health & Safety
Published: 2/2/2012
Authors: Julian S. Taurozzi, Vincent A Hackley, Mark R Wiesner
Abstract: Toxicity and fate assessment are key elements in the evaluation of the environmental, health and safety risks of engineered nanomaterials (ENMs). While significant effort and resources have been devoted to the toxicological evaluation of many ENMs, i ...

4. 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 ...

5. 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 ...

6. 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 ...

7. Diffusive Transport of Multiwall carbon nanotubes through an HDPE geomembrane
Topic: Nanotech/Environment, Health & Safety
Published: 9/30/2013
Authors: Pooneh Taghizadeh-Saheli, R. K. Rowe, Elijah J Petersen, Denis O'Carroll
Abstract: Carbon nanotubes are used in a wide range of consumer products. During the last few years, the applications for, and production of, carbon nanotubes has increased substantially. Due to their potential environmental and human health risks and eventual ...

8. 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 ...

9. Dispersion Stabilization of Silver Nanoparticles in Synthetic Lung Fluid Studied under In-Situ Conditions
Topic: Nanotech/Environment, Health & Safety
Published: 8/23/2010
Authors: Robert I. MacCuspie, Andrew John Allen, Vincent A Hackley
Abstract: The dispersion stabilization of silver nanoparticles in synthetic lung fluid is studied systematically to determine the key ingredients for colloidal stabilization. A variety of in-situ techniques are used, including dynamic light scattering, UV-Vis ...

10. 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 ...

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