Title :
Orientation of J-aggregate molecules in Langmuir film and Langmuir-Blodgett films of merocyanine dyes mixed with arachidic acid and n-octadecane and irradiation effect of visible light
Author :
Kushida, Masahito ; Imaizumi, Yoshiaki ; Okumura, Hiroteru
Author_Institution :
Dept. of Appl. Chem. & Biotechnology, Chiba Univ., Japan
Abstract :
Langmuir (L) film and Langmuir-Blodgett (LB) film of merocyanine dyes (MC) containing C18 alkyl chain mixed with arachidic acid (AA) and n-octadecane (OD) were fabricated. Surface-pressure-area isotherms of an L film and absorption spectra of LB films deposited on a substrate were measured. Amphiphilic molecular orientation in L film and the built-up proportion of MC J-aggregates to monomer and H-aggregates in MC-LB films mixed with AA and OD were controlled by altering the molar ratio of AA and OD to MC. The built-up proportion of MC J-aggregates in LB films decreased and the J-aggregates decayed to monomer and H-aggregates by increasing the exposure power of a 608-nm monochromatic light.
Keywords :
Langmuir-Blodgett films; molecular orientation; radiation effects; spectra; C18 alkyl chain; J-aggregate molecules; Langmuir film; Langmuir-Blodgett films; absorption spectra; amphiphilic molecular orientation; arachidic acid; irradiation effect; merocyanine dyes; molar ratio alteration; monochromatic light; n-octadecane effect; surface-pressure-area isotherms; visible light; Absorption; Biotechnology; Chemistry; Lighting control; Molecular electronics; Proportional control; Semiconductor films; Stability; Substrates; Systems engineering and theory;
Conference_Titel :
Micro-NanoMechatronics and Human Science, 2005 IEEE International Symposium on
Print_ISBN :
0-7803-9482-8
DOI :
10.1109/MHS.2005.1590001