Dipole Assisted Photogated Switch in Spiropyran Grafted Polyaniline Nanowires

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

In this work we show dipole-assisted photogated switching by covalent grafting of photoactive molecules to conducting polymers. Photochromic spiropyran molecules were covalently attached to polyaniline (PANI) nanowires via N-alkylation reaction to the quinoic part of PANI. Upon irradiation with ultraviolet light spiropyran transformed to a large dipole containing molecule, merocyanine form. We show that this transformation leads to a substantial (ca. 2 orders of magnitude) increase in conductance of the photochromic PANI nanowires, which were evident by an increase in field-effect mobility and calculated band gap narrowing of the system. Finally, this transformation was found to be fully reversible with no significant photofatigue.

Details

OriginalspracheEnglisch
Seiten (von - bis)3123-3128
Seitenumfang6
FachzeitschriftJournal of Physical Chemistry C, Nanomaterials and interfaces
Jahrgang115
Ausgabenummer7
PublikationsstatusVeröffentlicht - 24 Feb. 2011
Peer-Review-StatusJa

Schlagworte

Schlagwörter

  • Field-effect transistors, Prussian blue, Iron-oxide, Amphiphilic azobenzene, Magnetic vesicles, Nanoparticles, Films, Derivatives, Substrate, Polymers