引用本文:王元元,郭丹.聚苯乙烯纳米微球单层膜的制备、表征及其力学性能的研究[J].中国表面工程,2010,(2):86~89
WANG Yuan–yuan, GUO Dan.The Fabrication of PP-nanoparticles Monolayer and the Measurement of Elastic Properties[J].China Surface Engineering,2010,(2):86~89
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聚苯乙烯纳米微球单层膜的制备、表征及其力学性能的研究
王元元,郭丹
清华大学,摩擦学国家重点实验室,北京,100084
摘要:
通过对硅片基底亲水处理和改善纳米微球胶体溶液与硅片基底之间的浸润性，利用毛细管制得单层紧密排列的聚苯乙烯纳米微球，探讨了成膜机理与关键因素，和与其它方法相比，制样成功率高，操作简单，成膜速度快。利用AFM对纳米微球的力学性质进行了研究，着重分析了AFM力曲线的测量过程与分析方法，建立了AFM针尖与纳米微球之间的接触模型并测得室温下200 nm聚苯乙烯纳米微球的弹性模量为3.400±0.492 GPa。
关键词:  纳米微球  单层膜  AFM力曲线  弹性模量
DOI：
分类号:
基金项目:国家自然科学基金项目(50775121、50730007）
The Fabrication of PP-nanoparticles Monolayer and the Measurement of Elastic Properties
WANG Yuan–yuan, GUO Dan
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084
Abstract:
In order to obtain monolayer of polystyrene nanoparticles, hydrophilicity treatment to silicon substrate and the improvement of the surface wettability of the nanoparticles colloidal suspension has been used. The film forming mechanics and key factors were also investigated in this paper. Compared with other methods, it is more convenient and more likely to be successful. Besides, AFM was employed to measure the mechanical properties of the PP-nanoparticles due to its capability of locating individual particle precisely and applying ultra low loads on the nanospheres. Moreover, the experiment results show that the elastic modulus of 200 nm–diametered nanoparticles is 3.400±0.492 GPa.
Key words:  nanoparticles  monolayer  AFM force-displacement curve  elastic modulus
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