Materials + Technologies Group, Departamento de Ingeniería Química y Medio Ambiente, Escuela Politecnica, Universidad Pais Vasco/Euskal Herriko Unibertsitatea, Pza. Europa 1, 20018 Donostia-San Sebastian, Spain.
J Am Chem Soc. 2010 Jan 20;132(2):873-8. doi: 10.1021/ja908359k.
Amphiphilic polystyrene-b-poly(ethylene oxide) (PS-b-PEO) diblock copolymers with different block ratios were used as templates for the incorporation of a high content of titanium dioxide nanoparticles using the sol-gel method. Confinement of the inorganic part in the PEO block of the block copolymer allows the generation of nanostructured systems with a high nanoparticle content. As successfully demonstrated using tunneling atomic force microscopy, the investigated systems maintained the conductive properties of the TiO(2) nanoparticles. The obtained results confirmed that with increasing TiO(2) nanoparticle content, the local current value increased up to 15 pA, and this conductivity value strongly depended on the amount of the PEO block in the block copolymer template. Moreover, the results indicated that control of the ratio between the sol-gel and the PEO block allows the design of well-dispersed, conductive inorganic/organic hybrids with high inorganic content. These materials can provide attractive strategies in the field of dye-sensitized solar cells.
两亲性聚苯乙烯-b-聚（氧化乙烯）（PS-b-PEO）嵌段共聚物具有不同的嵌段比，可用作模板，通过溶胶-凝胶法将高含量的二氧化钛纳米粒子引入其中。无机部分在嵌段共聚物的 PEO 嵌段中的受限，允许生成具有高纳米粒子含量的纳米结构化体系。正如隧道原子力显微镜成功证明的那样，所研究的体系保持了 TiO(2)纳米粒子的导电性能。获得的结果证实，随着 TiO(2)纳米粒子含量的增加，局部电流值增加到 15 pA，并且这种电导率值强烈依赖于嵌段共聚物模板中 PEO 嵌段的量。此外，结果表明，控制溶胶-凝胶和 PEO 嵌段之间的比例可以设计具有高无机含量的分散良好的导电无机/有机杂化材料。这些材料可以为染料敏化太阳能电池领域提供有吸引力的策略。
