TY - JOUR
T1 - Ion-induced erosion of organic self-assembled monolayers
AU - Cyganik, P.
AU - Postawa, Z.
AU - Meserole, C. A.
AU - Vandeweert, E.
AU - Winograd, N.
N1 - Funding Information:
We would like to acknowledge the financial support of the US National Science Foundation, the US National Institutes of Health, the US Office of Naval Research, the Polish Committee for Scientific Research fund no PB1128/T08/96/11 and Maria Sklodowska-Curie Foundation fund no MEN/NSF-97-306. E.V. is partially supported by the Fulbright-Hayes Association and a NATO Research Fellowship. We would like to thank Prof. M. Szymonski for an access to the STM probe located at the Regional Laboratory of Physical and Chemical Analysis of Jagiellonian University.
PY - 1999
Y1 - 1999
N2 - Laser post-ionization mass spectrometry combined with Scanning Tunneling Microscopy (STM) has been used to investigate processes of ion-stimulated erosion of self-assembled monolayers (SAM) of phenethyl mercaptan C6H5CH2CH2S (PEM) deposited on gold. Results indicate that only PEM fragments are emitted from the surface. Most of the PEM fragments (predominantly C6H5CH2CH3 with m/z= 106) are emitted with thermal kinetic energies. STM images collected on 8 keV H2+-irradiated surfaces with a system tuned to probe electronic states of sulfur atoms show no additional damage induced by irradiation. This indicates that sulfur atoms are not removed from the surface during hydrogen bombardment. It is proposed that the emission of SAM molecules is initiated by chemical reactions which gently break C-S bonds.
AB - Laser post-ionization mass spectrometry combined with Scanning Tunneling Microscopy (STM) has been used to investigate processes of ion-stimulated erosion of self-assembled monolayers (SAM) of phenethyl mercaptan C6H5CH2CH2S (PEM) deposited on gold. Results indicate that only PEM fragments are emitted from the surface. Most of the PEM fragments (predominantly C6H5CH2CH3 with m/z= 106) are emitted with thermal kinetic energies. STM images collected on 8 keV H2+-irradiated surfaces with a system tuned to probe electronic states of sulfur atoms show no additional damage induced by irradiation. This indicates that sulfur atoms are not removed from the surface during hydrogen bombardment. It is proposed that the emission of SAM molecules is initiated by chemical reactions which gently break C-S bonds.
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U2 - 10.1016/S0168-583X(98)00751-4
DO - 10.1016/S0168-583X(98)00751-4
M3 - Article
AN - SCOPUS:0033513703
VL - 148
SP - 137
EP - 142
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
SN - 0168-583X
IS - 1-4
ER -