Photoinduced hydroxylation at ZnO surface

N. Asakuma; T. Fukui; M. Toki; K. Awazu; H. Imai

doi:10.1016/S0040-6090(03)01162-3

Photoinduced hydroxylation at ZnO surface

N. Asakuma, T. Fukui, M. Toki, K. Awazu, H. Imai

Department of Applied Chemistry

Research output: Contribution to journal › Conference article › peer-review

45 Citations (Scopus)

Abstract

We observed UV-stimulated hydroxylation at the surface of ZnO crystals. Reactive defective sites were initially formed in the surface layer via photoreduction induced with energetic photons above the band gap of ZnO. Hydroxyl groups were produced by a chemical reaction of the photoinduced defective sites with water molecules in the atmosphere. Two types of hydroxyl groups were found at the irradiated surface because two kinds of defective sites were induced with the UV illumination.

Original language	English
Pages (from-to)	284-287
Number of pages	4
Journal	Thin Solid Films
Volume	445
Issue number	2
DOIs	https://doi.org/10.1016/S0040-6090(03)01162-3
Publication status	Published - 2003 Dec 15
Event	Proceedings of the 3rd International Symposium on Transparent Oxide - Tokyo, Japan Duration: 2003 Apr 10 → 2003 Apr 11

Keywords

Hydroxylation
Photoreduction
Surface
Ultraviolet
ZnO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1016/S0040-6090(03)01162-3

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title = "Photoinduced hydroxylation at ZnO surface",

abstract = "We observed UV-stimulated hydroxylation at the surface of ZnO crystals. Reactive defective sites were initially formed in the surface layer via photoreduction induced with energetic photons above the band gap of ZnO. Hydroxyl groups were produced by a chemical reaction of the photoinduced defective sites with water molecules in the atmosphere. Two types of hydroxyl groups were found at the irradiated surface because two kinds of defective sites were induced with the UV illumination.",

keywords = "Hydroxylation, Photoreduction, Surface, Ultraviolet, ZnO",

author = "N. Asakuma and T. Fukui and M. Toki and K. Awazu and H. Imai",

note = "Funding Information: This work was supported by Grant-in-Aid for the 21st Century COE program {\textquoteleft}KEIO Life Conjugate Chemistry{\textquoteright} from the Ministry of Education, Culture, Sports, Science and Technology, Japan.; Proceedings of the 3rd International Symposium on Transparent Oxide ; Conference date: 10-04-2003 Through 11-04-2003",

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doi = "10.1016/S0040-6090(03)01162-3",

language = "English",

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pages = "284--287",

journal = "Thin Solid Films",

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TY - JOUR

T1 - Photoinduced hydroxylation at ZnO surface

AU - Asakuma, N.

AU - Fukui, T.

AU - Toki, M.

AU - Awazu, K.

AU - Imai, H.

N1 - Funding Information: This work was supported by Grant-in-Aid for the 21st Century COE program ‘KEIO Life Conjugate Chemistry’ from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

PY - 2003/12/15

Y1 - 2003/12/15

N2 - We observed UV-stimulated hydroxylation at the surface of ZnO crystals. Reactive defective sites were initially formed in the surface layer via photoreduction induced with energetic photons above the band gap of ZnO. Hydroxyl groups were produced by a chemical reaction of the photoinduced defective sites with water molecules in the atmosphere. Two types of hydroxyl groups were found at the irradiated surface because two kinds of defective sites were induced with the UV illumination.

AB - We observed UV-stimulated hydroxylation at the surface of ZnO crystals. Reactive defective sites were initially formed in the surface layer via photoreduction induced with energetic photons above the band gap of ZnO. Hydroxyl groups were produced by a chemical reaction of the photoinduced defective sites with water molecules in the atmosphere. Two types of hydroxyl groups were found at the irradiated surface because two kinds of defective sites were induced with the UV illumination.

KW - Hydroxylation

KW - Photoreduction

KW - Surface

KW - Ultraviolet

KW - ZnO

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U2 - 10.1016/S0040-6090(03)01162-3

DO - 10.1016/S0040-6090(03)01162-3

M3 - Conference article

AN - SCOPUS:1642377478

SN - 0040-6090

VL - 445

SP - 284

EP - 287

JO - Thin Solid Films

JF - Thin Solid Films

IS - 2

T2 - Proceedings of the 3rd International Symposium on Transparent Oxide

Y2 - 10 April 2003 through 11 April 2003

ER -

Photoinduced hydroxylation at ZnO surface

Abstract

Keywords

ASJC Scopus subject areas

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