The National Academies Logo
Research Associateship Programs
Fellowships Office
Policy and Global Affairs

Participating Agencies - NIST

  Sign InPrintable View

Opportunity at National Institute of Standards and Technology (NIST)

Advanced Coherent Raman Imaging for Polymer Physics

Location

Material Measurement Laboratory, Biosystems and Biomaterials Division

RO# Location
50.64.41.B7915 Gaithersburg, MD

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

Advisers

Name E-mail Phone
Lee, Young Jong youngjong.lee@nist.gov 301.975.6832
Migler, Kalman kalman.migler@nist.gov 301.975.4876
Snyder, Chad R. chad.snyder@nist.gov 301.975.4526

Description

This research aims to advance coherent Raman imaging techniques for addressing key issues in polymer physics. We have demonstrated that the rapid imaging speed of NIST developed broadband coherent Raman microscopy can acquire label-free chemical images >100 times faster than conventional spontaneous Raman microscopy methods. This rapid imaging speed enables the hyperspectral 3D imaging to simultaneously explore additional, unprecedented molecular information, such as local stress and crystallinity, within a practical period of data acquisition. Recently, we have developed a new approach to polarization-controlled vibrational spectroscopy that can determine the 3D angles of molecular orientation and their distributions. In particular, we plan to advance this rapid, non-invasive, multi-dimensional imaging technology for in-situ characterization of polymeric materials under physical and chemical changes, such as strain, extrusion, failure, polymerization, relaxation, and 3D printing. This newly available, spatially-resolved molecular information will help understand critical polymer physics issues that cannot be addressed with conventional ensemble based technologies.

Keywords:
CARS microscopy; Label-free chemical imaging; Polymer morphology; Crystallization; Raman imaging; Vibrational spectroscopy; 3D printing; Rheology; Orientation; Polarization

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral applicants
Copyright © 2014. National Academy of Sciences. All rights reserved. 500 Fifth St. N.W., Washington, D.C. 20001.
Terms of Use and Privacy Statement.