李少伟,郑雁军,陈长风.相结构对十八烷基三氯硅烷分子膜纳米机械强度的影响[J].表面技术,2017,46(8):91-95.
LI Shao-wei,ZHENG Yan-jun,CHEN Chang-feng.Effects of Phase Structure on Nano-mechanical Strength of Octadecyltrichlorosilane Molecular Films[J].Surface Technology,2017,46(8):91-95 |
| 相结构对十八烷基三氯硅烷分子膜纳米机械强度的影响 |
| Effects of Phase Structure on Nano-mechanical Strength of Octadecyltrichlorosilane Molecular Films |
| 投稿时间：2017-03-07 修订日期：2017-08-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.08.015 |
| 中文关键词: 十八烷基三氯硅烷 原子力 相结构 高度差 纳米机械强度 变形 |
| 英文关键词:octadecyltrichlorosilane atomic force phase structure height difference nano-mechanical strength deformation |
| 基金项目:高等学校博士学科点专项科研基金（20110007110009） |
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| 中文摘要: |
| 目的 研究相结构对十八烷基三氯硅烷（OTS）分子膜纳米机械性能的影响。方法 分别在冰水混合物温度和室温下制备了OTS分子膜的样品，利用原子力显微镜表征表面形貌，通过施加不同的探针作用力观察相对高度差变化。结果 随着针尖作用力的增加，冰水混合物温度下制备的OTS分子膜的相对高度差一直维持在2.02 nm左右；在室温下制备的OTS分子膜，针尖作用力在800 pN以下时，高度值维持在1.73 nm左右；针尖作用力增加到800 pN时，其相对高度差开始下降；当作用力增加到4 nN时，其相对高度差维持在1.44 nm左右。结论 有序致密排列的OTS分子岛具有较强的纳米机械强度，无序疏松的OTS分子岛具有较弱的纳米机械强度，易在较大探针作用力下被压变形。 |
| 英文摘要: |
| The work aims to study the effects of phase structure on nano-mechanical strength of octadecyltrichlorosilane (OTS) molecular films. The OTS molecular film samples were prepared at the temperature of ice-water mixture and room temperature, respectively. Morphology of two samples was characterized with AFM, and height difference of the films were observed by applying various tip-loading forces. With the increase of tip-loading force, relative height difference of OTS molecular film prepared at the temperature of ice-water mixture was constantly maintained at nearly 2.02 nm; for the OTS molecular film prepared at room temperature, the relative height difference did not decrease until the tip-loading force increased to 800 pN, and was maintained at nearly 1.44 nm as the force increased to 4 nN. The orderly and densely arranged OTS molecular film is of higher nano-mechanical strength while disorderly and loosely arranged OTS molecular film is of lower nano-mechanical strength, and may be subject to compressive deformation provided with high tip-loading force. |
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