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

Andreas Hutzler | Zendy; Tilo Schmutzler | Zendy; Michael P. M. Jank | Zendy; Robert Branscheid | Zendy; Tobias Unruh | Zendy; Erdmann Spiecker | Zendy; L. Frey | Zendy

Open Access

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

Author(s) -

Andreas Hutzler,

Tilo Schmutzler,

Michael P. M. Jank,

Robert Branscheid,

Tobias Unruh,

Erdmann Spiecker,

L. Frey

Publication year - 2018

Publication title -

nano letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.853

H-Index - 488

eISSN - 1530-6992

pISSN - 1530-6984

DOI - 10.1021/acs.nanolett.8b03388

Subject(s) - nanorod , nanostructure , dissolution , nanotechnology , materials science , chemical engineering , transmission electron microscopy , colloidal gold , surface plasmon resonance , nanocrystal , in situ , silver nanoparticle , plasmon , silver bromide , nanoparticle , chemistry , layer (electronics) , optoelectronics , silver halide , organic chemistry , engineering

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 Si 3 N 4 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.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research