skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Insight into the Phase Transformation Pathways of Copper Oxidation: From Oxygen Chemisorption on the Clean Surface to Multilayer Bulk Oxide Growth

Abstract

Here, we have employed ambient-pressure X-ray photoelectron spectroscopy to monitor the full pathway of copper oxidation from the initial stages of oxygen chemisorption on the clean surface to oxide nucleation and growth and then to growing continuous oxide layer. By increasing oxygen pressure in a stepwise way from pO 2 = 10 –7 to 1 Torr at T = 350 °C, we show that the oxidation of Cu(100) takes place by dissociative chemisorption of oxygen to first form the p(2 × 2) phase at pO 2 = 1 × 10 –7 Torr, which then transforms to the missing-row reconstruction with a higher oxygen coverage and upon increasing pO 2 from 1 × 10 –6 to 1 × 10 –3 Torr. After reaching pO 2 = 1 × 10 –2 Torr, nucleation and growth of Cu 2O islands occurs by consuming the regions. Increasing pO 2 to 0.1 Torr results in the continued Cu 2O growth with increased surface roughness. The surface is quickly covered with a CuO layer upon increasing pO 2 to 1 Torr, at which the surface oxidation occurs via the CuO/Cu 2O bilayer growth. The measurements delineate the range of pO 2 required for the crossover betweenmore » the different stages of the surface oxidation and may have practical importance by tuning the oxidation conditions that allow for controlling the oxide phase and atomic structure of the surface.« less

Authors:
 [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [1]
  1. State Univ. of New York, Binghamton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1489350
Report Number(s):
BNL-210831-2018-JAAM
Journal ID: ISSN 1932-7447
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 122; Journal Issue: 46; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Wang, Jianyu, Li, Chaoran, Zhu, Yaguang, Boscoboinik, Jorge Anibal, and Zhou, Guangwen. Insight into the Phase Transformation Pathways of Copper Oxidation: From Oxygen Chemisorption on the Clean Surface to Multilayer Bulk Oxide Growth. United States: N. p., 2018. Web. doi:10.1021/acs.jpcc.8b09145.
Wang, Jianyu, Li, Chaoran, Zhu, Yaguang, Boscoboinik, Jorge Anibal, & Zhou, Guangwen. Insight into the Phase Transformation Pathways of Copper Oxidation: From Oxygen Chemisorption on the Clean Surface to Multilayer Bulk Oxide Growth. United States. doi:10.1021/acs.jpcc.8b09145.
Wang, Jianyu, Li, Chaoran, Zhu, Yaguang, Boscoboinik, Jorge Anibal, and Zhou, Guangwen. Wed . "Insight into the Phase Transformation Pathways of Copper Oxidation: From Oxygen Chemisorption on the Clean Surface to Multilayer Bulk Oxide Growth". United States. doi:10.1021/acs.jpcc.8b09145.
@article{osti_1489350,
title = {Insight into the Phase Transformation Pathways of Copper Oxidation: From Oxygen Chemisorption on the Clean Surface to Multilayer Bulk Oxide Growth},
author = {Wang, Jianyu and Li, Chaoran and Zhu, Yaguang and Boscoboinik, Jorge Anibal and Zhou, Guangwen},
abstractNote = {Here, we have employed ambient-pressure X-ray photoelectron spectroscopy to monitor the full pathway of copper oxidation from the initial stages of oxygen chemisorption on the clean surface to oxide nucleation and growth and then to growing continuous oxide layer. By increasing oxygen pressure in a stepwise way from pO2 = 10–7 to 1 Torr at T = 350 °C, we show that the oxidation of Cu(100) takes place by dissociative chemisorption of oxygen to first form the p(2 × 2) phase at pO2 = 1 × 10–7 Torr, which then transforms to the missing-row reconstruction with a higher oxygen coverage and upon increasing pO2 from 1 × 10–6 to 1 × 10–3 Torr. After reaching pO2 = 1 × 10–2 Torr, nucleation and growth of Cu2O islands occurs by consuming the regions. Increasing pO2 to 0.1 Torr results in the continued Cu2O growth with increased surface roughness. The surface is quickly covered with a CuO layer upon increasing pO2 to 1 Torr, at which the surface oxidation occurs via the CuO/Cu2O bilayer growth. The measurements delineate the range of pO2 required for the crossover between the different stages of the surface oxidation and may have practical importance by tuning the oxidation conditions that allow for controlling the oxide phase and atomic structure of the surface.},
doi = {10.1021/acs.jpcc.8b09145},
journal = {Journal of Physical Chemistry. C},
issn = {1932-7447},
number = 46,
volume = 122,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 31, 2019
Publisher's Version of Record

Save / Share: