Comparative study of ZnO[sub x] overlayers on Cu(311), Cu(110), and a high defect concentration Cu(111)

Journal Article · Sat Feb 01 00:00:00 EST 1992 · Langmuir; (United States)

DOI:https://doi.org/10.1021/la00038a035· OSTI ID:5859510

Fu, S S; Somorjai, G A ^[1]

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1. Lawrence Berkeley Lab., CA (United States) Univ. of California, Berkeley, CA (United States)

Zinc and oxygen were deposited in ultrahigh vacuum to form ZnO[sub x] overlayers on three different copper faces, Cu(311), Cu(110), and a high defect concentration Cu(111). Up to 1.0 monolayer of ZnO[sub x] overlayers were examined. No long-range order was found for ZnO[sub x] overlayers on any of these surfaces. We used a combination of CO and CO[sub 2] temperature programmed desorption (TPD), Auger electron spectroscopy (AES), and low-energy electron diffraction (LEED) to follow chemical and structural changes of ZnO[sub x] overlayers on copper. Upon heating above 300 K, ZnO[sub x] area decreases while copper area increases, indicating clustering of ZnO[sub x]. In addition to changes in ZnO[sub x] overlayers on copper surfaces, we examined the decomposition of ZnO[sub x] to form Zn(g) and O(surface) by a combination of TPD, AES, and LEED. The desorption temperature of zinc vapor from the decomposition of ZnO[sub x] depends on the structure of the copper substrate. 17 refs., 8 figs.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5859510
• Journal Information: Langmuir; (United States), Vol. 8:2; ISSN 0743-7463
• Country of Publication: United States
• Language: English

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37 INORGANIC
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CARBON DIOXIDE
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OXIDES
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