TY - JOUR
T1 - Excited electron dynamics at ferrocene-terminated self-assembled monolayers on Au(1 1 1)
T2 - Lengthened lifetime of image potential state
AU - Hirata, Naoyuki
AU - Shibuta, Masahiro
AU - Eguchi, Toyoaki
AU - Nakajima, Atsushi
N1 - Funding Information:
This work is partly supported by MEXT-Supported Program for the Strategic Research Foundation at Private Universities, 2009-2013.
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/3/13
Y1 - 2013/3/13
N2 - Ultraviolet photoemission spectroscopy (UPS) and two-photon photoemission (2PPE) spectroscopy have been employed to investigate the electronic states and the excited electron dynamics of ferrocene (Fc)-terminated self-assembled monolayers (SAMs) on Au(1 1 1). For the 11-ferrocenyl-1-undecanethiol (FcC11-) SAM, an image potential state (IPS) located at EF +3.8 eV was observed by time-resolved 2PPE. Its lifetime, 90 fs, was found to be much shorter than that of decanethiol (C10-) SAM, 11 ps. By forming the C10-SAM beforehand, the IPS lifetime for FcC11-&C10-SAM was lengthened to ∼9 ps; this can enable improvement in molecular ordering and substantial formation of C10 domains.
AB - Ultraviolet photoemission spectroscopy (UPS) and two-photon photoemission (2PPE) spectroscopy have been employed to investigate the electronic states and the excited electron dynamics of ferrocene (Fc)-terminated self-assembled monolayers (SAMs) on Au(1 1 1). For the 11-ferrocenyl-1-undecanethiol (FcC11-) SAM, an image potential state (IPS) located at EF +3.8 eV was observed by time-resolved 2PPE. Its lifetime, 90 fs, was found to be much shorter than that of decanethiol (C10-) SAM, 11 ps. By forming the C10-SAM beforehand, the IPS lifetime for FcC11-&C10-SAM was lengthened to ∼9 ps; this can enable improvement in molecular ordering and substantial formation of C10 domains.
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U2 - 10.1016/j.cplett.2013.01.053
DO - 10.1016/j.cplett.2013.01.053
M3 - Article
AN - SCOPUS:84874658040
SN - 0009-2614
VL - 561-562
SP - 131
EP - 136
JO - Chemical Physics Letters
JF - Chemical Physics Letters
ER -