Title

Photosensitization of carbon nanotubes using dye aggregates

Authors

Authors

R. Tsuchikawa; H. Y. Ahn; S. Yao; K. D. Belfield;M. Ishigami

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Phys.-Condes. Matter

Keywords

SCANNING-TUNNELING-MICROSCOPY; MEMORY DEVICES; SQUARAINE DYES; THIN-FILMS; FLUORESCENCE; ABSORPTION; TRANSISTOR; SURFACES; MOBILITY; BEHAVIOR; Physics, Condensed Matter

Abstract

Ordered assemblies of dye molecules, dye aggregates, possess significantly larger molar optical absorptivity than dye monomers. Yet, aggregates have not been utilized for photosensitizing nanoscale electronic devices. We find that single-walled carbon nanotubes, which are cleaned down to the atomic scale, template the growth of squaraine dye aggregates and these aggregates effectively photosensitize nanotubes. Templating of aggregates by nanotubes and functionalization of nanotubes with ordered molecular films are reported for the first time. The sensitivity achieved by aggregate-functionalized nanotube network devices is approximately an order of magnitude better than those of similar nanotube devices functionalized with dye monomers and photoactive polymers.

Journal Title

Journal of Physics-Condensed Matter

Volume

23

Issue/Number

20

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

5

WOS Identifier

WOS:000290212300004

ISSN

0953-8984

Share

COinS