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Opportunity at National Institute of Standards and Technology (NIST)

Surface Metrology of Nanomaterials

Location

Material Measurement Laboratory, Materials Measurement Science Division

RO# Location
50.64.31.B8070 Gaithersburg, MD

Please note: This Agency only participates in the February and August reviews.

Advisers

Name E-mail Phone
Gorham, Justin M. justin.gorham@nist.gov 301.975.5944
Hackley, Vincent A. vince.hackley@nist.gov 301.975.5790

Description

Surface chemical and physical properties increasingly dominate nanomaterial behavior as their dimensions decrease below 100 nm. As a result, relatively small changes to the surface properties can have a dramatic impact on the form, functionality, and fate of nanomaterials used in consumer and biomedical products. This research opportunity focuses on developing measurement science, methods and protocols used to determine and quantify (1) nanomaterials surface states and speciation, (2) transformations impacting the lifecycles of nanomaterials in products, and (3) changes to surface functionality under simulated use conditions. The equipment available to perform these essential measurements is available at NIST and includes access to a state-of-the-art imaging X-ray photoelectron spectrometer (XPS). Supporting the XPS measurements are transmission electron microscopy, scanning electron microscopy, scanning probe microscopies, and infrared spectroscopy. Some examples of research topics include, but are not limited to (1) detection and characterization of nanoparticles within consumer products with a focus on correlating physico-chemical characteristics to performance, (2) the impact of transformations on nanomaterial's surface coatings that develop due to environmental or biological exposures, or (3) relating surface chemistry to nanoparticle release in nanocomposites.

 

References

Gorham JM, et al: "Storage Wars: how citrate-capped silver nanoparticle suspensions are affected by not-so-trivial decisions." Journal of Nanoparticle Research 2014

Gorham JM, et al: "Photo-induced surface transformations of silica nanocomposites." Surface and Interface Analysis 2012

 

Keywords:
Nanomaterials; Nanoparticle composites; Surface chemistry; Physico-chemical characterization; nanoEHS; Life cycle analysis; Environmental transformations; Biological transformations; X-ray photoelectron spectroscopy;

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral applicants
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