Fractal-like gold nanonetworks formed by templated electrodeposition through 3D-mesoporous silica films.
Fractal-like gold nanonetworks formed by templated electrodeposition through 3D-mesoporous silica films.
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作者：
描述了通过模板电沉积创建的金纳米粒子的分形网络。模板化电沉积是一种强大而高效的自下而上制造纳米结构的技术，可以有效控制电沉积的尺寸和形状。在这项工作中，合成了具有高度有序介孔和三维介观结构的介孔二氧化硅薄膜，并将其用作金纳米颗粒电沉积的模板。介孔二氧化硅薄膜具有小介孔（∼8 nm）和复杂的介孔通道（Fmmm结构，[0 1 0]轴垂直于基底）。应用各种成核条件来研究它们对模板电沉积中纳米颗粒排列和生长的影响。电沉积金颗粒通过电子显微镜和掠入射小角 X 射线散射 (GISAXS) 进行表征。 GISAXS 显示了金电沉积后细观结构晶格参数的变化，这些变化与主要球形孔隙之间最短距离相关的方向尺寸变化有关。顶视图 SEM 显示大面积的金纳米粒子沉积在薄膜中，并且它们向表面生长。去除二氧化硅膜模板后，金纳米颗粒显示出有趣的分形形态：连接的金纳米网络形成分支结构。分支的长度根据所应用的成核沉积条件而变化。一般来说，随着成核时间的增加，更有可能获得具有较长分支的分形金纳米粒子。描述了通过模板电沉积创建的金纳米粒子的分形网络。
Fractal-like networks of gold nanoparticles created by templated electrodeposition are described. Templated electrodeposition is a powerful and efficient technique for the bottom-up fabrication of nanostructures which can effectively control the size and shape of the electrodeposits. In this work, mesoporous silica films with highly ordered mesopores and three-dimensional mesostructure are synthesised and are used as templates for the electrodeposition of gold nanoparticles. The mesoporous silica films have small mesopores (∼8 nm) and complex mesopore channels (Fmmm structure with the [0 1 0] axis perpendicular to the substrate). A variety of nucleation conditions were applied to investigate their effect on the nanoparticles' arrangement and growth in templated electrodeposition. The electrodeposited gold particles are characterised by electron microscopy and grazing incidence small-angle X-ray scattering (GISAXS). GISAXS shows changes in the lattice parameters of the mesostructure after gold electrodeposition that relate to dimensional changes in directions linked to the shortest distances between the main spherical pores. Top-view SEM shows large areas of gold nanoparticles were deposited into the film and they were growing towards the surface. After removing the silica film templates, the gold nanoparticles display interesting fractal morphologies: the linked gold nanonetworks form a branched structure. The lengths of branches vary from the applied nucleation deposition conditions. Generally, with increasing nucleation time, fractal gold nanoparticles with longer branches are more likely to be obtained. Fractal-like networks of gold nanoparticles created by templated electrodeposition are described.
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可定制的软件，用于快速减少和分析大型X射线散射数据集：新的DPDAK软件包应用于小角生角X射线散射和放牧的小角度X射线散射。
影响因子：
6.1
作者：
Benecke G;Wagermaier W;Li C;Schwartzkopf M;Flucke G;Hoerth R;Zizak I;Burghammer M;Metwalli E;Müller-Buschbaum P;Trebbin M;Förster S;Paris O;Roth SV;Fratzl P
通讯作者：
Fratzl P
影响因子：
5.9
作者：
Ghosh, Shilpi;Sharma, Sachin Kumar;Bal, Rajaram
通讯作者：
Bal, Rajaram
DOI：
10.1016/b978-0-12-814033-8.00009-6
发表时间：
2019-01-01
期刊：
NANOCARRIERS FOR DRUG DELIVERY: NANOSCIENCE AND NANOTECHNOLOGY IN DRUG DELIVERY
影响因子：
--
作者：
Ghosh, Sougata
通讯作者：
Ghosh, Sougata
影响因子：
8
作者：
Amina SJ;Guo B
通讯作者：
Guo B
影响因子：
2.7
作者：
Anitas, Eugen Mircea
通讯作者：
Anitas, Eugen Mircea