Abstract
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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 137-142 |
| Number of pages | 6 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
| Volume | 148 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - Jan 1 1999 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Instrumentation
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Ion-induced erosion of organic self-assembled monolayers. / Cyganik, P.; Postawa, Z.; Meserole, C. A.; Vandeweert, E.; Winograd, Nicholas.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 148, No. 1-4, 01.01.1999, p. 137-142.Research output: Contribution to journal › Article
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, Nicholas
PY - 1999/1/1
Y1 - 1999/1/1
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 -