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2009 , Vol. 24 >Issue 4: 749 - 754

DOI: https://doi.org/10.3724/SP.J.1077.2009.00749

研究论文

四方相BaTiO3薄膜的自组装制备与表征

  • 谈国强 ,
  • 刘 剑 ,
  • 苗鸿雁 ,
  • 贺中亮 ,
  • 夏 傲
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  • 陕西科技大学 教育部轻化工助剂化学与技术重点实验室， 西安 710021

收稿日期: 2008-11-28

  修回日期: 2009-02-20

  网络出版日期: 2009-07-20

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Preparation and Characterization of Tetragonal BaTiO3 Thin Film with Self-assembled Monolayers Technique

  • TAN Guo-Qiang ,
  • LIU Jian ,
  • MIAO Hong-Yan ,
  • HE Zhong-Liang ,
  • XIA Ao
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  • Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi Universtry of Science and Technology, Xi’an 710021, China

Received date: 2008-11-28

  Revised date: 2009-02-20

  Online published: 2009-07-20

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摘要

以(NH4)2TiF6、 Ba(NO3)2 和H3BO3为主要原料, 采用自组装单层膜(SAMs)技术, 以三氯十八烷基硅烷(octadecyl-trichloro-silane, OTS)为模版, 在玻璃基片上制备了四方相钛酸钡晶态薄膜. 改性基板的亲水性测定与原子力显微镜（AFM）测试表明, 紫外光照射使基板由疏水转变为亲水, 能够对OTS-SAM起到修饰作用. 金相显微镜观察结果显示，OTS单分子膜指导沉积的薄膜样品表面均匀, 表明OTSSAM对钛酸钡薄膜的沉积具有诱导作用; X射线衍射（XRD）与扫描电镜（SEM）表征显示, 空气中600℃下保温2h实现了薄膜由非晶态向四方相BaTiO3晶态薄膜的转化过程, 制备的钛酸钡薄膜在基板表面呈纳米线状生长, 线长约在500～1000nm之间, 相互连接的晶粒大小约为100nm. 文章同时对自组装单层膜和钛酸钡薄膜的形成机理进行了探讨.

关键词： 自组装单层膜; 钛酸钡; 薄膜; 形成机理

本文引用格式

谈国强 , 刘 剑 , 苗鸿雁 , 贺中亮 , 夏 傲 . 四方相BaTiO3薄膜的自组装制备与表征[J]. 无机材料学报, 2009 , 24(4) : 749 -754 . DOI: 10.3724/SP.J.1077.2009.00749

Abstract

Self-assembled monolayers (SAMs) technique based on traditional liquid phase deposition and bio-inspired theory is one of the most promising processes for preparing inorganic thin films. Using octadecyl-trichloro-silane (OTS) as stencil, tetragonal BaTiO3 thin film was successfully prepared on glass wafers in the solution consisting of (NH4)2TiF6, Ba(NO3)2 and H3BO3 with SAMs technique. Hydrophilic characteristic mensuration of glass wafers and photographs of atomic force microscopy (AFM) indicate that the hydrophobe substrate changes into hydrophile by UV iradiation, and a modification of OTS-SAM is changed by UV light. Photographs of metallographic microscope indicate that the surface of BaTiO3 thin film deposited on OTS-SAM is smooth and homogeneous, and an induction of BaTiO3 thin film deposition is directed by OTS-SAM. X-ray diffraction (XRD) and field-emission scanning electron microscope (FE-SEM) results show that the BaTiO3 thin film with well-crystalline tetragonal phase is successfully prepared after annealing at 600℃ in air for 2h. BaTiO3 thin film grows on glass substrate with a rod-like morphology, the length of the nanowire is in the range from 500nm to 1000nm, which is composed of nanosized grains of around 100nm. The formation mechanism of OTS-SAM and BaTiO3 thin film is carefully discussed.

Key words： self-assembled monolayers; BaTiO3; thin film; formation mechanism

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