Control of Pore and Wire Dimensions in Mesoporous Metal Nanowire Networks through Curvature Modulation in Lipid Templates: Implications for Use as Electrodes
Control of Pore and Wire Dimensions in Mesoporous Metal Nanowire Networks through Curvature Modulation in Lipid Templates: Implications for Use as Electrodes
复制标题
DOI：
10.1021/acsanm.1c00505
复制
发表时间：
2021-05-24
影响因子：
5.9
通讯作者：
Squires, Adam M.
中科院分区：
文献类型：
--
作者：
Akbar, Samina;Boswell, Jacob;Squires, Adam M.
本文介绍了具有周期性3D纳米结构的介孔金属的制备，显示了对晶格参数的控制，从而控制了孔和线的尺寸。这种材料具有“单钻石”(Fd3m)对称性，是通过沉积在脂类植三醇的“立方相”模板中而产生的，这一过程以前发表过。目前的工作显示了一种通过添加共表面活性剂来调节金属纳米尺度的机制，该共表面活性剂可以逐渐减少模板中的脂质双层曲率。这会使其晶格参数膨胀，从而使熔敷金属的晶格参数膨胀。用X射线散射、电子显微镜和电化学分析对介孔铂样品进行了表征。这些结构的单胞尺寸从13到20 nm不等，导线厚度从3.0到5.3 nm，估计孔尺寸从6.2到8.8 nm。这些材料中的尺寸控制为控制电催化和传感器中的电化学行为提供了一种机制。此外，模板在其他金属和半导体材料中的使用表明，尺寸控制为具有设计的光电性能的超材料提供了可能性。
This paper presents the production of mesoporous metals with periodic 3D nanostructures, showing control over the lattice parameter and therefore pore and wire dimensions. The materials have "single diamond" (Fd3m) symmetry and are produced by deposition within a "cubic phase" template of the lipid phytantriol, in a process previously published. The current work shows a mechanism for tuning the nanoscale dimensions of the metal by the addition of a cosurfactant that progressively reduces the lipid bilayer curvature in the template. This swells its lattice parameter and therefore that of the deposited metal. Mesoporous platinum samples were characterized using X-ray scattering, electron microscopy, and electrochemical analysis. The structures exhibit unit cell sizes ranging from 13 to 20 nm, with wire thicknesses from 3.0 to 5.3 nm and estimated pore dimensions from 6.2 to 8.8 nm. The size control in these materials provides a mechanism for control of electrochemical behavior in electrocatalysis and sensors. Furthermore, the use of the templates in other metal and semiconductor materials suggests that size control offers possibilities for metamaterials with designed optoelectronic properties.