【作者】 侯仪； 赵宁； 徐坚；

【Author】 Yi Hou;Ning Zhao;Jian Xu;Beijing National Laboratory for Molecular Science, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences;

【机构】 中国科学院化学研究所高分子物理与化学实验室；

【摘要】 在平整基底上制备厚度均匀可控的纳米颗粒涂层已实现规模化制备,对于具有微结构的菲涅尔透镜等基底,由于重力、表面张力、毛细力等因素[1-2],导致难以通过简单的方法在微结构表面构筑共形、厚度均匀可控的纳米颗粒涂层。研究发现[3],采用带电纳米颗粒和带异性电荷的可反应小分子,通过两者的静电和化学键作用,结合不同界面间的电位差,可以在各种形貌和尺度的微结构上组装共形、均匀、厚度随组装时间可控的纳米颗粒涂层,应用该方法在微结构光学表面制备的减反射膜可使可见光平均透过率提高2.6%(单面涂敷)。这种简便的易于工程化的方法为聚光太阳能、激光显示等领域的应用奠定了技术基础。更多还原

【Abstract】 Assembling nanoparticles(NPs) on various surfaces has been intensively investigated for the construction of functional nanocoatings, however, it is still a challenge to fabricate conformal nanocoatings uniformly on surfaces having micro-or nano-structures. Herein, we demonstrate that the negatively charged SiO2 NPs and the positively charged silicon coupling agent can be assembled layer by layer on the microstructures based on the combination of electrostatic interaction and condensation reaction. Conformal nanocoatings with controllable thickness have been formed on the microstructured surfaces with different compositions and morphologies. The formation mechanism was confirmed by using QCM-D to study the assembly process in real-time.The universal of this method has been illustrated by using other reactive building blocks with opposite charge to build up the conformal nanocoatings. Application in the preparation of antireflective nanocoatings on non-planar optical materials has been demonstrated. This simple, versatile and scalable strategy for the preparation of conformal nanocoatings is promising for the practical applications.更多还原