qlectric field enhanced alignment of biopolymers for nonlinear applications

Debra J. Trantolo; Joseph D. Gresser; Donald L. Wise; Marc G. Mogul; Thomas M. Cooper; Gary E. Wnek

doi:10.1117/12.219546

15 September 1995 Electric field enhanced alignment of biopolymers for nonlinear applications

Debra J. Trantolo, Joseph D. Gresser, Donald L. Wise, Marc G. Mogul, Thomas M. Cooper, Gary E. Wnek

Proceedings Volume 2528, Optical and Photonic Applications of Electroactive and Conducting Polymers; (1995) https://doi.org/10.1117/12.219546
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Oriented films of poly((gamma) -benzyl-L-glutamate), PBLG, were prepared by evaporation of solvent from solutions held in electric fields applied parallel to the film surface. Films thus aligned showed non-linear optical (NLO) activity, i.e., second harmonic generation (SHG). Order parameters calculated from FTIR spectra were correlated with second order susceptibility, and the effects of field strength, solution concentration, and molecular weight on these parameters were investigated. Alignment was observed at field strengths as low as 0.8 kV/cm, as indicated by polarized IR spectra. However, the extent of alignment as measured by IR spectra and values of the second order nonlinear susceptibility, X⁽²), depend not only on field strength but also on solution concentration and the polymer molecular weight. Optimum conditions for alignment appear to be with a molecular weight of 118,000 D and a solution concentration of 2.5% (w/w). Dried films show the typical banded structures reported for polymer films oriented by mechanical shearing stresses. We have shown that these structures extend through the dried film as laminae perpendicular to both the film surface and to the field direction.

Citation Download Citation

Debra J. Trantolo, Joseph D. Gresser, Donald L. Wise, Marc G. Mogul, Thomas M. Cooper, and Gary E. Wnek "Electric field enhanced alignment of biopolymers for nonlinear applications", Proc. SPIE 2528, Optical and Photonic Applications of Electroactive and Conducting Polymers, (15 September 1995); https://doi.org/10.1117/12.219546

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available