Study on fabrication of microlens array using photodecomposition of polysilane

由于硅-硅键的光化学性质，聚硅烷被认为是一类新型的功能聚合物，其特征是共轭硅主链和紫外光分解。由于紫外线在空气中的光分解而形成的Si-O-Si和Si-OH键导致了聚硅烷薄膜性质的变化，例如它们的润湿性或遇水膨胀。已知紫外暴露的聚硅烷膜可以选择性地染色，只需将其浸泡在水性阳离子染料溶液中，利用阳离子染料与紫外光分解形成的Si-OH基团之间的特定相互作用。在本研究中，从进一步开发聚硅烷应用的角度出发，我们试图利用Si-O^-单元与阳离子聚合物胶体之间的离子相互作用，在紫外光照射的聚硅烷薄膜上制造出理想尺寸的阳离子聚合物胶体凸微透镜阵列。此外，在许多光学应用和数字光学成像系统中需要微透镜阵列。通过浸泡在水性阳离子聚合物胶体溶液中，然后进行热处理以回流沉积的聚合物（化学聚合物涂层），我们成功地展示了一组尺寸为10卡米的微透镜。为了控制聚合物的沉积量，阴离子和阳离子聚合物胶体交替沉积技术具有重要意义。用这种方法可以很容易地在任何衬底上得到微透镜阵列。此外，在紫外光照射下覆盖聚硅烷薄膜的透明ITO（氧化铟锡）上，利用彩色聚合物胶体溶液的电沉积方法，成功制备了尺寸为10μm的彩色（蓝色和绿色）折射微透镜阵列。从现在开始，我们将对电功能微透镜阵列的制造进行研究。这些结果将为开发实际应用的聚硅烷作为一类新的功能聚合物提供新的途径。少

Polysilanes have been recognized as being a new class of functional polymers, characterized by as-conjugated Si backbone and an ultraviolet (UV) photodecomposition due to the photochemical nature of the Si-Si bonds. The formation of Si-O-Si and Si-OH bonds due to UV photodecomposition in air induces changes in the nature of polysilane films, such as their wettability or swelling with water. It was known that UV-exposed polysilane film could be selectively dyed by simply soaking it in an aqueous cationic dye solution, using a specific interaction between cationic dyes and Si-OH moieties formed by UV photodecomposition.In this study, from the view point of exploiting the further application of polysilanes, we have tried to fabricate a convex microlens array of cationic polymer colloids to a desired size on polysilane films patterned by UV-light irradiation utilizing the ionic interaction between the Si-O^-units and the cationic polymer colloid. In addition, microlens arrays are required … More in many optical applications and in digital optical imaging systems. By soaking in an aqueous cationic polymer colloids solution followed by the heat-treatment to reflow the deposited polymer (the electroless polymer coating), we have successfully demonstrated an array of microlenses of 10 jam in size. In order to control the amount of polymer deposition, also, the alternating deposition technique of anionic and cationic polymer colloids was significant. With this method, the microlens array would be obtained easily on any substrates.On the transparent ITO (Indium tin oxide) covered with a polysilane film patterned by UV-light irradiation, moreover, an array of the colored (blue and green) refractive microlenses (10μm in size) was successfully fabricated using the electro-deposition of a colored polymer colloids solution.From now, we will carry out investigations into the fabrication of an electrically functional microlens array.These results obtained here would offer new avenues in developing practical applications of polysilanes appeared as a new class of functional polymers. Less