The use of engineered nanoparticles in research and in consumer products engenders a growing need to understand their properties and behaviors as they are synthesized, applied and evolve (or age) in a particular environment. There is an increasing awareness of the need to understand the health, safety and environmental impact of nanoparticles in their snthesized form and as they evolve through application or environmental interaction. It is also recognized the reports on the properties of nanoparticles are sometimes based on inadequate characterization. This talk will provide examples of measurement issues and challenges we have faced in understanding and characterizing various types of nanoparticles. Topics include: the importance of surface characteriation; effects of synthesis and handling details on particle properties; influence of solution conditions on particle aging and chemical state; and characterization challenges associated with time, insitu versus ex situ measurement, probe damage, and particle extraction from solution.

Preparation and characterization challenges to understanding environmental and biological impacts of nanoparticles

243rd National Meeting (2012)

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