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Interaction between surface migrating pentacene molecules and chemically modified surfaces of silicon oxides studied by pulsed molecular beam scattering

机译:通过脉冲分子束散射研究表面迁移并五苯分子与氧化硅化学修饰表面之间的相互作用

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The interaction between pentacene molecules and organic self-assembling monolayers formed on silicon oxides (SiO2) was studied by measuring the surface scattering time profile of the pulsed molecular beam of pentacene. It was found that the surface residence time (SRT) of pentacene was significantly reduced on a surface treated with hexamethyl silazarane (HMDS) compared with that on a bare SiO2 surface. The activation energies derived from the temperature dependence of the SRT were 24 kJ/mol and 100 kJ/mol for HMDS-SiO2 and the bare SiO2, respectively. A surface treated with octadecyltrichlorosilane (OTS) showed SRT values almost the same as those on the bare SiO2 surface, which was due to exposed SiO2 regions on the thermally-degraded OTS-SiO2. The growth mechanism with improved quality is due to the shallower adsorption potential and enhanced migration of pentacene by the surface alkylation. (c) 2006 Elsevier B.V. All rights reserved.
机译:通过测量并五苯脉冲分子束的表面散射时间分布,研究并五苯分子与在氧化硅(SiO2)上形成的有机自组装单分子层之间的相互作用。结果发现,与在裸露的SiO2表面上相比,在用六甲基甲硅烷基烷烃(HMDS)处理的表面上并五苯的表面停留时间(SRT)大大降低。从SRT的温度依赖性得出的活化能对于HMDS-SiO2和裸SiO2分别为24 kJ / mol和100 kJ / mol。用十八烷基三氯硅烷(OTS)处理的表面显示的SRT值几乎与SiO2裸表面上的SRT值相同,这是由于热降解的OTS-SiO2上的SiO2区域裸露所致。质量提高的生长机理是由于较低的吸附势和并五苯由于表面烷基化而增加的迁移。 (c)2006 Elsevier B.V.保留所有权利。

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