Accession Number:

ADA244287

Title:

Macromolecular Control of Structural Organization in Thin Molecular Films: Implications for Chemical and Optical Switching

Descriptive Note:

Final rept. 1 Apr 1988-31 Mar 1991

Corporate Author:

MASSACHUSETTS UNIV AMHERST DEPT OF POLYMER SCIENCE AND ENGINEERING

Personal Author(s):

Report Date:

1991-08-31

Pagination or Media Count:

9.0

Abstract:

This program was concerned with the development of new ultrathin membranes that respond to well-defined chemical and physical signals. Such membranes are proposed to be useful in applications such as chemical sensing and controlled chemical delivery. The mechanism by which these membranes respond to signals involves changes in the conformation and solvation of surface-bound polyelectrolyte chains. Because polyelectrolytes can be rendered sensitive to many different environmental parameters e.g., pH, light, ionic strength, etc. this approach provides a new route to molecular films subject to switching in response to many different and useful stimuli. To date, we have prepared membrane systems switchable with pH, temperature, light, glucose concentration, ionic strength, and electrochemical reduction.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE