Light-Controlled Conductance Switching in Azobenzene-Containing MWCNT-Polymer Nanocomposites

摘要

We report on reversible light-controlled conductance switching in devices consisting of multiwalled carbon nanotube (MWCNT)-polymer nano-composites blended with azobenzene molecules and photoisomerization of the latter. Both the azobenene molecules and MWCNT, which are functionalized with carboxyl groups (MWCNT-COOH), are embedded independently in a poly(methyl methacrylate) matrix, and thin films are prepared by using a simple spin-coating technique. We demonstrate the feasibility of the present concept with a photocurrent switching amplitude of almost 10%.