Accession Number:

ADA393686

Title:

Study of Polydispersity of Grafted Poly(dimethylsiloxane) Surfaces Using Single Molecule Atomic Force Microscopy

Descriptive Note:

Technical rept.,

Corporate Author:

PITTSBURGH UNIV PA DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

2000-01-01

Pagination or Media Count:

3.0

Abstract:

Single molecule atomic force microscopy AFM was used to study the statistical distribution of contour lengths polydispersity of polymer chains grafted to a surface. A polydimethylsiloxane PDMS monolayer was grafted on a flat silicon substrate by covalently bonding Cl-terminated PDMS to an OH-silicon surface and characterized using contact angle measurements and ellipsometry, and single molecule AFM. A model for the single chain dynamics is presented. The statistical distributions of the polymer contour lengths were found to depend on concentration of the PDMS polymer used in the grafting solutions.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE