材料科学
介孔材料
聚苯乙烯
化学工程
沉积(地质)
薄膜
多孔性
电极
覆盖层
纹理(宇宙学)
纳米技术
复合材料
化学
聚合物
有机化学
物理化学
工程类
古生物学
催化作用
图像(数学)
人工智能
沉积物
计算机科学
生物
作者
Mathieu Etienne,Sébastien Sallard,Michael Schröder,Yann Guillemin,Simone Mascotto,Bernd M. Smarsly,Alain Walcarius
摘要
Thin films with combined macropores (∼100 nm) and mesopores (∼3 nm) can be prepared by the electro-assisted deposition of a mesoporous silica material inside a polystyrene bead assembly. The filling of voids between the polystyrene beads template strongly depends on the deposition time, as demonstrated by systematic SEM analysis. Low deposition time leads only to very thin silica layers on the PS beads. Longer deposition time leads to the complete filling of the macroporous texture and to the growth of an additional overlayer with very well oriented pores normal to the electrode surface. The presence of mesopores into the film has been evidenced with using TEM, grazing incidence X-ray diffraction (GIXD), and Krypton sorption isotherm. The electrochemical characterization demonstrates that the hierarchical material is highly permeable to external reagents, being thereby promising for various applications involving such mass transport processes.
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