| LI Shao-wei,ZHENG Yan-jun,CHEN Chang-feng.Effects of Phase Structure on Nano-mechanical Strength of Octadecyltrichlorosilane Molecular Films[J],46(8):91-95 |
| Effects of Phase Structure on Nano-mechanical Strength of Octadecyltrichlorosilane Molecular Films |
| Received:March 07, 2017 Revised:August 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.08.015 |
| KeyWord:octadecyltrichlorosilane atomic force phase structure height difference nano-mechanical strength deformation |
| Author | Institution |
| LI Shao-wei |
Laboratory of Materials Science and Engineering, China University of Petroleum in Beijing, Beijing , China |
| ZHENG Yan-jun |
Laboratory of Materials Science and Engineering, China University of Petroleum in Beijing, Beijing , China |
| CHEN Chang-feng |
Laboratory of Materials Science and Engineering, China University of Petroleum in Beijing, Beijing , China |
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| Abstract: |
| 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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