Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.2969468
Title: Reversible work function changes induced by photoisomerization of asymmetric azobenzene dithiol self-assembled monolayers on gold
Authors: Ah Qune, L.F.N.
Akiyama, H.
Nagahiro, T.
Tamada, K. 
Wee, A.T.S. 
Issue Date: 2008
Citation: Ah Qune, L.F.N., Akiyama, H., Nagahiro, T., Tamada, K., Wee, A.T.S. (2008). Reversible work function changes induced by photoisomerization of asymmetric azobenzene dithiol self-assembled monolayers on gold. Applied Physics Letters 93 (8) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.2969468
Abstract: 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. © 2008 American Institute of Physics.
Source Title: Applied Physics Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/97825
ISSN: 00036951
DOI: 10.1063/1.2969468
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