Abstract
Scanning tunneling microscopy images of Pt vapor deposited on the basal plane of highly oriented pyrolytic graphite, HOPG(bp), under ultrahigh vacuum have been recorded in air at room temperature. Areas of specimens masked during Pt deposition displayed characteristic corrugations associated with bare graphite over 20˟ 20 nm2 areas, with no indication of surface damage or contamination over much larger sections, 400 ˟ 400 nm2. Unmasked areas of samples with coverages in the range between ca. 10‥ and 40‥, as estimated from X-ray photoelectron spectroscopy, contained small features (5-nm average lateral dimension) with internal structures of atomic dimensions. An analysis of variance of the maximum heights for clusters observed on representative areas of 10 ‥, 28 ‥, and 40 ‥ Pt/ HOPG(bp) specimens provided evidence that the means (ca. 0.38 nm) are not significantly different (P = 0.80). Hence, the three distributions appear to have been drawn from the same parent distribution. This strongly suggests that deposition of Pt on HOPG(bp) under the experimental conditions employed in this work gives rise to the preferential formation of essentially two-dimensional Pt structures on the surface.
| Original language | English |
|---|---|
| Pages (from-to) | 1316-1319 |
| Number of pages | 4 |
| Journal | Langmuir |
| Volume | 6 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1990 Jan 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Spectroscopy
- Electrochemistry
Cite this
Scanning Tunneling Microscopy of Platinum Deposits on the Basal Plane of Highly Oriented Pyrolytic Graphite. / Eppell, Steve; Chottiner, Gary S.; Scherson, Daniel Alberto; Pruett, Gary.
In: Langmuir, Vol. 6, No. 7, 01.01.1990, p. 1316-1319.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Scanning Tunneling Microscopy of Platinum Deposits on the Basal Plane of Highly Oriented Pyrolytic Graphite
AU - Eppell, Steve
AU - Chottiner, Gary S.
AU - Scherson, Daniel Alberto
AU - Pruett, Gary
PY - 1990/1/1
Y1 - 1990/1/1
N2 - Scanning tunneling microscopy images of Pt vapor deposited on the basal plane of highly oriented pyrolytic graphite, HOPG(bp), under ultrahigh vacuum have been recorded in air at room temperature. Areas of specimens masked during Pt deposition displayed characteristic corrugations associated with bare graphite over 20˟ 20 nm2 areas, with no indication of surface damage or contamination over much larger sections, 400 ˟ 400 nm2. Unmasked areas of samples with coverages in the range between ca. 10‥ and 40‥, as estimated from X-ray photoelectron spectroscopy, contained small features (5-nm average lateral dimension) with internal structures of atomic dimensions. An analysis of variance of the maximum heights for clusters observed on representative areas of 10 ‥, 28 ‥, and 40 ‥ Pt/ HOPG(bp) specimens provided evidence that the means (ca. 0.38 nm) are not significantly different (P = 0.80). Hence, the three distributions appear to have been drawn from the same parent distribution. This strongly suggests that deposition of Pt on HOPG(bp) under the experimental conditions employed in this work gives rise to the preferential formation of essentially two-dimensional Pt structures on the surface.
AB - Scanning tunneling microscopy images of Pt vapor deposited on the basal plane of highly oriented pyrolytic graphite, HOPG(bp), under ultrahigh vacuum have been recorded in air at room temperature. Areas of specimens masked during Pt deposition displayed characteristic corrugations associated with bare graphite over 20˟ 20 nm2 areas, with no indication of surface damage or contamination over much larger sections, 400 ˟ 400 nm2. Unmasked areas of samples with coverages in the range between ca. 10‥ and 40‥, as estimated from X-ray photoelectron spectroscopy, contained small features (5-nm average lateral dimension) with internal structures of atomic dimensions. An analysis of variance of the maximum heights for clusters observed on representative areas of 10 ‥, 28 ‥, and 40 ‥ Pt/ HOPG(bp) specimens provided evidence that the means (ca. 0.38 nm) are not significantly different (P = 0.80). Hence, the three distributions appear to have been drawn from the same parent distribution. This strongly suggests that deposition of Pt on HOPG(bp) under the experimental conditions employed in this work gives rise to the preferential formation of essentially two-dimensional Pt structures on the surface.
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U2 - 10.1021/la00097a021
DO - 10.1021/la00097a021
M3 - Article
VL - 6
SP - 1316
EP - 1319
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 7
ER -