Chain Conformation in Ultrathin Polymer Films

Published

December 1, 2002

Author(s)

Ronald L. Jones, Christopher Soles, Francis W. Starr, Eric K. Lin, Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, Wen-Li Wu, D L. Goldfarb, M Angelopolous

Abstract

Using Small Angle Neutron Scattering (SANS), we present the first quantitative measurements of the 3-dimensional conformation of macromolecules in thin polymer films of D < RG,Bulk. Where D is the film thickness and RG,Bulk is the bulk radius of gyration. For D [approximately equal to] 0.5 RG,Bulk, the molecular size along the film normal is less than 0.5 RG,Bulk, while relatively small changes are observed parallel to the surface. The observed changes in molecular size agree with predictions of molecular dynamics simulations of polymers confined in thin films, resulting from increased molecular orientation rather than chain distortion. Segregation of molecular centers of mass to the film center facilitates molecular packing while minimizing chain distortion.

Proceedings Title

Advances in Resist Technology and Processing, Conference | 19th | | SPIE

Volume

4690

Issue

Pt. 1

Conference Dates

March 1, 2002

Conference Location

Santa Clara, CA

Conference Title

Proceedings of SPIE--the International Society for Optical Engineering

Pub Type

Conferences

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Keywords

chain conformation, photolithography, photoresists, polymer thin films, scattering, small angle neutron

Citation

Jones, R. , Soles, C. , Starr, F. , Lin, E. , Lenhart, J. , Wu, W. , Goldfarb, D. and Angelopolous, M. (2002), Chain Conformation in Ultrathin Polymer Films, Advances in Resist Technology and Processing, Conference | 19th | | SPIE, Santa Clara, CA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852065 (Accessed May 19, 2024)