In:
Surface Science Spectra, American Vacuum Society, Vol. 27, No. 1 ( 2020-06-01)
Abstract:
Near ambient pressure-x-ray photoelectron spectroscopy (NAP-XPS) is a less traditional form of XPS that allows samples to be analyzed at relatively high pressures, i.e., at greater than 2500 Pa. With NAP-XPS, XPS can probe moderately volatile liquids, biological samples, porous materials, and/or polymeric materials that outgas significantly. In this submission, we show survey, O 1s/Ag 3p, Ca 3p/Ag 3d, and extended valence band (0–130 eV) NAP-XPS spectra of an ancient Roman coin at three different positions. A small N 1s signal from N2 background gas is also observed. On the obverse side, the coin bears the bust of Licinius I. On the reverse side, it bears the image of Jupiter. The Ag 3d region indicates different amounts of silver at different oxidation states in different positions.
Type of Medium:
Online Resource
ISSN:
1055-5269
,
1520-8575
DOI:
10.1116/1.5135326.N0164001
DOI:
10.1116/1.5135326.N0164002
DOI:
10.1116/1.5135326.N0164003
DOI:
10.1116/1.5135326.N0164004
DOI:
10.1116/1.5135326.N0164005
DOI:
10.1116/1.5135326.N0164006
DOI:
10.1116/1.5135326.N0164007
DOI:
10.1116/1.5135326.N0164008
DOI:
10.1116/1.5135326.N0164009
DOI:
10.1116/1.5135326.N0164010
DOI:
10.1116/1.5135326.N0164011
DOI:
10.1116/1.5135326.N0164012
Language:
English
Publisher:
American Vacuum Society
Publication Date:
2020
detail.hit.zdb_id:
2008474-2
SSG:
11
Permalink