Photodecomposition of pentacene films on atomically controlled SrTiO 3(001) surfaces

Yuji Matsumoto; Hideomi Koinuma; Takeo Ohsawa

doi:10.1021/jp072365c

Photodecomposition of pentacene films on atomically controlled SrTiO ₃(001) surfaces

Yuji Matsumoto, Hideomi Koinuma, Takeo Ohsawa

ENG - Applied Chemistry

Tokyo Institute of Technology

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Photodecomposition of pentacene films grown on the atomically controlled SrTiO₃(001) (STO) surfaces was investigated by atomic force microscopy. The photodecomposition was found to occur only when the coverage of the pentacene film was less than 1 ML on the TiO₂-terminated STO(001). When the oxygen adsorption is a rate-limiting step, the decomposition rate is nearly proportional to the surface area uncovered with pentacene island, while at the last stage of the decomposition it is in proportion not to the coverage of the pentacene islands but to the perimeter of the pentacene islands. The SrO-terminated STO(001) surface exhibits very little activity in the photodecomposition of the pentacene. The exponential decay of the rate constant with the SrO coverage suggests that it is attributed to some chemical effect such as the formation of Sr hydroxide at the SrO-terminated surface.

Original language	English
Pages (from-to)	10523-10527
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	28
DOIs	https://doi.org/10.1021/jp072365c
Publication status	Published - 2007 Jul 19

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title = "Photodecomposition of pentacene films on atomically controlled SrTiO 3(001) surfaces",

abstract = "Photodecomposition of pentacene films grown on the atomically controlled SrTiO3(001) (STO) surfaces was investigated by atomic force microscopy. The photodecomposition was found to occur only when the coverage of the pentacene film was less than 1 ML on the TiO2-terminated STO(001). When the oxygen adsorption is a rate-limiting step, the decomposition rate is nearly proportional to the surface area uncovered with pentacene island, while at the last stage of the decomposition it is in proportion not to the coverage of the pentacene islands but to the perimeter of the pentacene islands. The SrO-terminated STO(001) surface exhibits very little activity in the photodecomposition of the pentacene. The exponential decay of the rate constant with the SrO coverage suggests that it is attributed to some chemical effect such as the formation of Sr hydroxide at the SrO-terminated surface.",

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TY - JOUR

T1 - Photodecomposition of pentacene films on atomically controlled SrTiO 3(001) surfaces

AU - Matsumoto, Yuji

AU - Koinuma, Hideomi

AU - Ohsawa, Takeo

PY - 2007/7/19

Y1 - 2007/7/19

N2 - Photodecomposition of pentacene films grown on the atomically controlled SrTiO3(001) (STO) surfaces was investigated by atomic force microscopy. The photodecomposition was found to occur only when the coverage of the pentacene film was less than 1 ML on the TiO2-terminated STO(001). When the oxygen adsorption is a rate-limiting step, the decomposition rate is nearly proportional to the surface area uncovered with pentacene island, while at the last stage of the decomposition it is in proportion not to the coverage of the pentacene islands but to the perimeter of the pentacene islands. The SrO-terminated STO(001) surface exhibits very little activity in the photodecomposition of the pentacene. The exponential decay of the rate constant with the SrO coverage suggests that it is attributed to some chemical effect such as the formation of Sr hydroxide at the SrO-terminated surface.

AB - Photodecomposition of pentacene films grown on the atomically controlled SrTiO3(001) (STO) surfaces was investigated by atomic force microscopy. The photodecomposition was found to occur only when the coverage of the pentacene film was less than 1 ML on the TiO2-terminated STO(001). When the oxygen adsorption is a rate-limiting step, the decomposition rate is nearly proportional to the surface area uncovered with pentacene island, while at the last stage of the decomposition it is in proportion not to the coverage of the pentacene islands but to the perimeter of the pentacene islands. The SrO-terminated STO(001) surface exhibits very little activity in the photodecomposition of the pentacene. The exponential decay of the rate constant with the SrO coverage suggests that it is attributed to some chemical effect such as the formation of Sr hydroxide at the SrO-terminated surface.

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Photodecomposition of pentacene films on atomically controlled SrTiO ₃(001) surfaces

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