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@article{faucris.206104673,
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
experimen},
author = {Hutzler, Andreas and Schmutzler, Tilo and Jank, Michael P. M. and Branscheid, Robert and Unruh, Tobias and Spiecker, Erdmann and Frey, Lothar},
doi = {10.1021/acs.nanolett.8b03388},
faupublication = {yes},
journal = {Nano Letters},
keywords = {Liquid cell TEM; Ag@Au; core−shell; electron beam-induced growth; plasmonic structures; graphene},
pages = {7222 - 7229},
peerreviewed = {Yes},
title = {{Unravelling} the {Mechanisms} of {Gold}−{Silver} {Core}−{Shell} {Nanostructure} {Formation} by in {Situ} {TEM} {Using} an {Advanced} {Liquid} {Cell} {Design}},
url = {https://pubs.acs.org/doi/10.1021/acs.nanolett.8b03388},
volume = {18},
year = {2018}
}