School of Chemistry and Chemical Engineering, the State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China.
J Am Chem Soc. 2012 Dec 19;134(50):20238-41. doi: 10.1021/ja309168f. Epub 2012 Dec 10.
Controlling of the orientation of mesochannels in mesostructured thin films is important for the development of novel molecular devices and, in particular, generating vertically aligned mesochannels with respect to the substrate plane is extremely challenging for nonsiliceous materials. We describe a facile and highly effective air flow method, which is able to control the unidirectional alignment of titania mesochannels in a desired direction (e.g., parallel, perpendicular, or oblique) on a large scale, via manipulation of the air flow rate and incident angle. The titania mesochannels were characterized by TEM, SEM, SAXRD, and GISAXS. The unidirectional, vertically aligned mesostructured titania films were found to exhibit excellent ion conductivity.
控制介孔薄膜中介孔的方向对于新型分子器件的发展非常重要，特别是对于非硅材料而言，生成与基底平面垂直的取向一致的介孔是极具挑战性的。我们描述了一种简便而高效的气流方法，通过控制气流速率和入射角，能够在较大范围内控制二氧化钛介孔以所需方向（例如，平行、垂直或倾斜）的单向排列。通过 TEM、SEM、SAXRD 和 GISAXS 对二氧化钛介孔进行了表征。发现单向、垂直取向的介孔结构化二氧化钛薄膜具有优异的离子导电性。
