Abstract
The adsorption of methanethiol and n-propanethiol on the Au(111) surface has been studied by temperature-programmed desorption (TPD), Auger electron spectroscopy (AES), and low-temperature scanning tunneling microscopy (LT-STM). Methanethiol desorbs molecularly from the chemisorbed monolayer at temperatures below 220 K in three overlapping desorption processes. No evidence for S-H or C - S bond cleavage has been found on the basis of three types of observations: (1) A mixture of chemisorbed CH 3SD and CD 3SH does not yield CD 3SD, (2) no sulfur remains after desorption, and (3) no residual surface species remain when the adsorbed layer is heated to 300 K as measured by STM. On the other hand, when defects are introduced on the surface by ion bombardment, the desorption temperature of CH 3SH is extended to 300 K and a small amount of dimethyl disulfide is observed to desorb at 410 K, indicating that S-H bond scission occurs on defect sites on Au(111) followed by dimerization of CH 3S(a) species. Propanethiol also adsorbs nondissociatively on the Au(111) surface and desorbs from the surface below 250 K.
| Original language | English |
|---|---|
| Pages (from-to) | 15992-15996 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry B |
| Volume | 109 |
| Issue number | 33 |
| DOIs | |
| Publication status | Published - 2005 Aug 25 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
Cite this
Nondissociative chemisorption of short chain alkanethiols on Au(111). / Rzeznicka, Izabela Irena; Lee, Junseok; Maksymovych, Petro; Yates, John T.
In: Journal of Physical Chemistry B, Vol. 109, No. 33, 25.08.2005, p. 15992-15996.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nondissociative chemisorption of short chain alkanethiols on Au(111)
AU - Rzeznicka, Izabela Irena
AU - Lee, Junseok
AU - Maksymovych, Petro
AU - Yates, John T.
PY - 2005/8/25
Y1 - 2005/8/25
N2 - The adsorption of methanethiol and n-propanethiol on the Au(111) surface has been studied by temperature-programmed desorption (TPD), Auger electron spectroscopy (AES), and low-temperature scanning tunneling microscopy (LT-STM). Methanethiol desorbs molecularly from the chemisorbed monolayer at temperatures below 220 K in three overlapping desorption processes. No evidence for S-H or C - S bond cleavage has been found on the basis of three types of observations: (1) A mixture of chemisorbed CH 3SD and CD 3SH does not yield CD 3SD, (2) no sulfur remains after desorption, and (3) no residual surface species remain when the adsorbed layer is heated to 300 K as measured by STM. On the other hand, when defects are introduced on the surface by ion bombardment, the desorption temperature of CH 3SH is extended to 300 K and a small amount of dimethyl disulfide is observed to desorb at 410 K, indicating that S-H bond scission occurs on defect sites on Au(111) followed by dimerization of CH 3S(a) species. Propanethiol also adsorbs nondissociatively on the Au(111) surface and desorbs from the surface below 250 K.
AB - The adsorption of methanethiol and n-propanethiol on the Au(111) surface has been studied by temperature-programmed desorption (TPD), Auger electron spectroscopy (AES), and low-temperature scanning tunneling microscopy (LT-STM). Methanethiol desorbs molecularly from the chemisorbed monolayer at temperatures below 220 K in three overlapping desorption processes. No evidence for S-H or C - S bond cleavage has been found on the basis of three types of observations: (1) A mixture of chemisorbed CH 3SD and CD 3SH does not yield CD 3SD, (2) no sulfur remains after desorption, and (3) no residual surface species remain when the adsorbed layer is heated to 300 K as measured by STM. On the other hand, when defects are introduced on the surface by ion bombardment, the desorption temperature of CH 3SH is extended to 300 K and a small amount of dimethyl disulfide is observed to desorb at 410 K, indicating that S-H bond scission occurs on defect sites on Au(111) followed by dimerization of CH 3S(a) species. Propanethiol also adsorbs nondissociatively on the Au(111) surface and desorbs from the surface below 250 K.
UR - http://www.scopus.com/inward/record.url?scp=24944474758&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=24944474758&partnerID=8YFLogxK
U2 - 10.1021/jp058124r
DO - 10.1021/jp058124r
M3 - Article
C2 - 16853029
AN - SCOPUS:24944474758
VL - 109
SP - 15992
EP - 15996
JO - Journal of Physical Chemistry B Materials
JF - Journal of Physical Chemistry B Materials
SN - 1520-6106
IS - 33
ER -