Quantitative 3D Characterization of Nanoporous Gold Nanoparticles by Transmission Electron Microscopy

被引：6

作者：

Mahr, Christoph ^{[1
,2
]}

Dworzak, Alexandra ^{[3
,4
]}

Schowalter, Marco ^{[1
,2
]}

Oezaslan, Mehtap ^{[3
,4
]}

Rosenauer, Andreas ^{[1
,2
]}

机构：

[1] Univ Bremen, Inst Solid State Phys, Otto Hahn Allee 1, D-28359 Bremen, Germany

[2] Univ Bremen, MAPEX Ctr Mat & Proc, Bibliothekstr 1, D-28359 Bremen, Germany

[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Tech Chem, Tech Electrocatalysis Lab, Franz Liszt Str 35a, D-38106 Braunschweig, Germany

[4] Carl von Ossietzky Univ Oldenburg, Inst Chem, Carl von Ossietzky Str 9-11, D-26129 Oldenburg, Germany

来源：

MICROSCOPY AND MICROANALYSIS | 2021年 / 27卷 / 04期

关键词：

dealloying; nanoparticles; nanoporous gold; STEM tomography; tortuosity; 3-DIMENSIONAL RECONSTRUCTION; CATALYTIC-ACTIVITY; METAL; TOMOGRAPHY; DIMENSIONS; MORPHOLOGY; EVOLUTION; DIFFUSION; OXIDATION; ALKALINE;

D O I：

10.1017/S1431927621000519

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Quantitative structural characterization of nanomaterials is important to tailor their functional properties. Corrosion of AgAu-alloy nanoparticles (NPs) results in porous structures, making them interesting for applications especially in the fields of catalysis and surface-enhanced Raman spectroscopy. For the present report, structures of dealloyed NPs were reconstructed three-dimensionally using scanning transmission electron microscopy tomography. These reconstructions were evaluated quantitatively, revealing structural information such as pore size, porosity, specific surface area, and tortuosity. Results show significant differences compared to the structure of dealloyed bulk samples and can be used as input for simulations of diffusion or mass transport processes, for example, in catalytic applications.

引用

页码：678 / 686

页数：9

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