Reversible work function changes induced by photoisomerization of asymmetric azobenzene dithiol self-assembled monolayers on gold

Lloyd F.N. Ah Qune, H. Akiyama, T. Nagahiro, K. Tamada, Andrew T.S. Wee

研究成果: Article査読

38 被引用数 (Scopus)

抄録

We measured reversible changes in the work function (Δ φAu) of gold substrates modified by asymmetric azobenzene dithiol self-assembled monolayers (SAMs) following photoisomerization and thermal recovery of the azo unit. The azobenzene derivative SAMs were photoisomerized to cis form by UV irradiation. Δ φAu was monitored in real time during thermal recovery to trans form by ultraviolet photoelectron spectroscopy using a synchrotron light source. Changing the substituted functional group in the p′ position of the azobenzene from electron donating to electron withdrawing resulted in opposite responses of Δ φAu against photoisomerization. Hence, a direct correlation between Δ φAu and changes in molecular dipole moments was obtained.

本文言語English
論文番号083109
ジャーナルApplied Physics Letters
93
8
DOI
出版ステータスPublished - 2008

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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