Du Chuan, Wang Jiadao, Chen Darong
State Key Laboratory of Tribology, Tsinghua University , Beijing 100084, P.R. China.
Langmuir. 2014 Feb 4;30(4):976-83. doi: 10.1021/la403536u. Epub 2014 Jan 17.
An approach for manufacturing polytetrafluoroethylene nanoparticle films using repulsive electrostatic interactions was developed. This approach used the strong repulsive force between colloidal nanoparticles and a substrate surface to cause the colloidal nanoparticles to suspend and self-assemble at a near-wall equilibrium position. A suspended monolayer was formed and was subsequently deposited on the substrate surface. A relatively large-area (3 × 3 cm(2)), close-packed unordered monolayer of polytetrafluoroethylene nanoparticles was observed. Multilayer nanoparticle films were also generated by increasing the particle concentration and deposition time. This work confirms the feasibility of nanoparticle self-assembly under repulsive electrostatic interactions and provides new routes for the large-area fabrication of monolayer and multilayer close-packed nanoparticle films.
开发了一种利用排斥性静电相互作用制造聚四氟乙烯纳米颗粒薄膜的方法。该方法利用胶体纳米颗粒与基底表面之间的强排斥力，使胶体纳米颗粒在近壁平衡位置悬浮并自组装。形成了一个悬浮的单层，随后沉积在基底表面。观察到了相对大面积（3×3平方厘米）、紧密堆积的无序聚四氟乙烯纳米颗粒单层。通过增加颗粒浓度和沉积时间也制备出了多层纳米颗粒薄膜。这项工作证实了在排斥性静电相互作用下纳米颗粒自组装的可行性，并为大面积制备单层和多层紧密堆积纳米颗粒薄膜提供了新途径。
