Unravelling the Mechanisms of Gold−Silver Core−Shell Nanostructure Formation by in Situ TEM Using an Advanced Liquid Cell Design

Hutzler A, Schmutzler T, Jank MPM, Branscheid R, Unruh T, Spiecker E, Frey L (2018)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Nano Letters American Chemical Society

Book Volume: 18

Pages Range: 7222 - 7229

Journal Issue: 11

URI: https://pubs.acs.org/doi/10.1021/acs.nanolett.8b03388

DOI: 10.1021/acs.nanolett.8b03388

Open Access Link: https://pubs.acs.org/doi/10.1021/acs.nanolett.8b03388

Abstract

The growth of silver shells on gold nanorods is investigated by in situ liquid cell transmission electron microscopy using an advanced liquid cell architecture. The design is based on microwells in which the liquid is confined between a thin Si3N4 membrane on one side and a few-layer graphene cap on the other side. A well-defined specimen thickness and an ultraflat cell top allow for the application of high-resolution TEM and the application of analytical TEM techniques on the same sample. The combination of high-resolution data with chemical information is validated by radically new insights into the growth of silver shells on cetrimonium bromide stabilized gold nanorods. It is shown that silver bromide particles already formed in the stock solution play an important role in the exchange of silver ions. The Ag shell growth can be directly correlated with the layer-by-layer dissolution of AgBr nanocrystals, which can be controlled by the electron flux density via distinctly generated chemical species in the solvent. The derived model framework is confirmed by in situ UV–vis absorption spectroscopy evaluating the blue shift in the longitudinal surface plasmon resonance of anisotropic NRs in a complementary batch experiment.

Authors with CRIS profile

Andreas Hutzler Lehrstuhl für Elektronische Bauelemente Tilo Schmutzler Professur für Nanomaterialcharakterisierung (Streumethoden) Robert Branscheid Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Tobias Unruh Professur für Nanomaterialcharakterisierung (Streumethoden) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Lothar Frey Lehrstuhl für Elektronische Bauelemente

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Related research project(s)

Growth and stability of anisotropic nanoparticles in liquids (GRK1896-A2) In-situ Characterization of Nanomaterials with Electrons, X-rays/Neutrons and Scanning Probes (GRK 1896) Oct. 1, 2013 - Sept. 30, 2022 In-situ Characterization of Nanomaterials with Electrons, X-rays/Neutrons and Scanning Probes (GRK 1896) Oct. 1, 2013 - Sept. 30, 2022

Involved external institutions

Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie (IISB) DE Germany (DE)

How to cite

APA:

Hutzler, A., Schmutzler, T., Jank, M.P.M., Branscheid, R., Unruh, T., Spiecker, E., & Frey, L. (2018). Unravelling the Mechanisms of Gold−Silver Core−Shell Nanostructure Formation by in Situ TEM Using an Advanced Liquid Cell Design. Nano Letters, 18(11), 7222 - 7229. https://doi.org/10.1021/acs.nanolett.8b03388

MLA:

Hutzler, Andreas, et al. "Unravelling the Mechanisms of Gold−Silver Core−Shell Nanostructure Formation by in Situ TEM Using an Advanced Liquid Cell Design." Nano Letters 18.11 (2018): 7222 - 7229.

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