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
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)
作者单位
李少伟 中国石油大学(北京) 材料科学与工程实验室,北京 102249 
郑雁军 中国石油大学(北京) 材料科学与工程实验室,北京 102249 
陈长风 中国石油大学(北京) 材料科学与工程实验室,北京 102249 
AuthorInstitution
LI Shao-wei Laboratory of Materials Science and Engineering, China University of Petroleum in Beijing, Beijing 102249, China 
ZHENG Yan-jun Laboratory of Materials Science and Engineering, China University of Petroleum in Beijing, Beijing 102249, China 
CHEN Chang-feng Laboratory of Materials Science and Engineering, China University of Petroleum in Beijing, Beijing 102249, China 
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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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