Petersen E.J. – TechConnect Briefs

Multi-method analysis of multiwall carbon nanotube polymer nanocomposite after photodegradation

Petersen E.J., Lam T., Gorham J., Scott K., Long C., Sharma R., Sung L.P., Liddle J.A., Nguyen T., National Institute of Standards and Technology, US

Nanomaterials can be used as nanofillers to enhance the properties of polymeric materials. However, the effect of weathering on nanocomposites and the potential for nanomaterial release is not yet well known. This stems partly from [...]

Potential artifacts when evaluating the ecotoxicological effects of nanomaterials

Petersen E.J., Henry T.B., Zhao J., MacCuspie R.I., Kirschling T.L., Xing B., Dobrovolskaia M.A., Hackley V., White J.C., National Institute of Standards and Technology, US

Novel physicochemistries of engineered nanomaterials (ENMs) offer considerable commercial potential for new products and processes, but also the possibility of unforeseen and negative consequences upon ENM release into the environment. Investigations of ENM ecotoxicity have [...]

Potential artifacts when evaluating the ecotoxicological effects of nanomaterials

Petersen E.J., Henry T.B., Zhao J., MacCuspie R.I., Kirschling T.L., Xing B., Dobrovolskaia M.A., Hackley V., White J.C., National Institute of Standards and Technology, US

Novel physicochemistries of engineered nanomaterials (ENMs) offer considerable commercial potential for new products and processes, but also the possibility of unforeseen and negative consequences upon ENM release into the environment. Investigations of ENM ecotoxicity have [...]

Using single particle ICP-MS as a tool for understanding metallonanoparticles transformation during nanotoxicity assays

Johnson M.E., Hanna S.K., Petersen E.J., Nelson B.C., Yu L.L., National Institute of Standards and Technology, US

The work presented will establish a method for employing SP-ICP-MS toward the characterization of ENPs following their exposure to a model organism, C. elegans. Sample preparation, SP-ICP-MS analysis, data processing, particulate transport efficiency evaluation, and [...]

Multi-method analysis of multiwall carbon nanotube polymer nanocomposite after photodegradation

Petersen E.J., Lam T., Gorham J., Scott K., Long C., Sharma R., Sung L.P., Liddle J.A., Nguyen T., National Institute of Standards and Technology, US

Nanomaterials can be used as nanofillers to enhance the properties of polymeric materials. However, the effect of weathering on nanocomposites and the potential for nanomaterial release is not yet well known. This stems partly from [...]

Quantitative Assessment of Nanoparticle Induced Oxidative DNA Damage Using Isotope Dilution Mass Spectrometry

Petersen E.J., Marquis B.J., Jaruga P., Dizdaroglu M., Nelson B.C., National Institute of Standards and Technology, US

Hyphenated mass spectrometry (gas chromatography/mass spectrometry) techniques have been employed as one of the primary analytical tools for investigating the effects of ionizing radiation, chemical/biological carcinogens and oxygen derived free radicals on the induction and [...]

Tools and Approaches for the Assessment of Nanomaterial Induced Oxidative DNA Damage

Petersen E.J., Marquis B.J., Jaruga P., Dizdaroglu M., Nelson B.C., National Institute of Standards and Technology, US

Determining the effects of various surface coatings on carbon nanotubes (CNTs) is critical given the numerous expected applications of CNTs and their inevitable release into ecosystems. To explore the potential ecotoxicological effects of CNT surface [...]

Uptake and Elimination Behaviors of Polyethyleneimine (PEI)-Coated Multi-Walled Carbon Nanotubes by Eisenia Foetida and Daphnia Magna

Petersen E.J., Pinto R.A., Mai D.J., Landrum P.F., Zhang L., Huang Q., Shi X., Weber Jr W.J., National Institute of Standards and Technology, US

Hyphenated mass spectrometry (gas chromatography/mass spectrometry) techniques have been employed as one of the primary analytical tools for investigating the effects of ionizing radiation, chemical/biological carcinogens and oxygen derived free radicals on the induction and [...]