In Situ Liquid Cell TEM Studies on Etching and Growth Mechanisms of Gold Nanoparticles at a Solid-Liquid-Gas Interface

Journal article
(Original article)


Publication Details

Author(s): Hutzler A, Fritsch B, Jank MPM, Branscheid R, Martens R, Spiecker E, März M
Journal: Advanced Materials Interfaces
Publication year: 2019
ISSN: 2196-7350
Language: English


Abstract

Etching and growth of gold nanoparticles at a solid-liquid-gas interface are investigated via in situ liquid cell transmission electron microscopy. For this purpose, the gold precursor tetrachloroauric acid is enclosed in the wells of a free-standing, locally thinned silicon nitride film covered by few-layer graphene. Etching of gold is attributed to hydroxide radicals generated by radiolysis and gaseous species which are located within a gas bubble. The etching mechanism comprises two distinct cases. In one case, the gas bubble is in direct contact with the gold particle, separated only by a thin liquid membrane. In the other case, the gold particle is thoroughly immersed in liquid in the vicinity of the particle. In the latter, etching molecules diffuse from the bubble through the liquid towards the surface of the nanoparticle and subsequently etch the gold platelet. During the particle etching process, concurrent nucleation and ripening of gold nanoparticles is observed. This growth is induced by local supersaturation of the solution with gold ions. Experimental results show that the growth process is limited by diffusion, even though the diffusivity of reactants is very low due to narrow-channel effects compared against the diffusivity of solvated ions in bulk liquids.


FAU Authors / FAU Editors

Branscheid, Robert
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Fritsch, Birk
Lehrstuhl für Elektronische Bauelemente
Hutzler, Andreas Dr.-Ing.
Lehrstuhl für Elektronische Bauelemente
Martens, Roric
Lehrstuhl für Elektronische Bauelemente
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Additional Organisation
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Lehrstuhl für Leistungselektronik


External institutions with authors

Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie (IISB)


How to cite

APA:
Hutzler, A., Fritsch, B., Jank, M.P.M., Branscheid, R., Martens, R., Spiecker, E., & März, M. (2019). In Situ Liquid Cell TEM Studies on Etching and Growth Mechanisms of Gold Nanoparticles at a Solid-Liquid-Gas Interface. Advanced Materials Interfaces. https://dx.doi.org/10.1002/admi.201901027

MLA:
Hutzler, Andreas, et al. "In Situ Liquid Cell TEM Studies on Etching and Growth Mechanisms of Gold Nanoparticles at a Solid-Liquid-Gas Interface." Advanced Materials Interfaces (2019).

BibTeX: 

Last updated on 2019-23-08 at 08:38