Switching Plasmons: Gold Nanorod-Copper Chalcogenide Core-Shell Nanoparticle Clusters with Selectable Metal/Semiconductor NIR Plasmon Resonances

Journal of the American Chemical Society
Madathumpady Abubaker Habeeb MuhammedJessica Rodríguez-Fernández

Abstract

Exerting control over the near-infrared (NIR) plasmonic response of nanosized metals and semiconductors can facilitate access to unexplored phenomena and applications. Here we combine electrostatic self-assembly and Cd(2+)/Cu(+) cation exchange to obtain an anisotropic core-shell nanoparticle cluster (NPC) whose optical properties stem from two dissimilar plasmonic materials: a gold nanorod (AuNR) core and a copper selenide (Cu(2-x)Se, x ≥ 0) supraparticle shell. The spectral response of the AuNR@Cu2Se NPCs is governed by the transverse and longitudinal plasmon bands (LPB) of the anisotropic metallic core, since the Cu2Se shell is nonplasmonic. Under aerobic conditions the shell undergoes vacancy doping (x > 0), leading to the plasmon-rich NIR spectrum of the AuNR@Cu(2-x)Se NPCs. For low vacancy doping levels the NIR optical properties of the dually plasmonic NPCs are determined by the LPBs of the semiconductor shell (along its major longitudinal axis) and of the metal core. Conversely, for high vacancy doping levels their NIR optical response is dominated by the two most intense plasmon modes from the shell: the transverse (along the shortest transversal axis) and longitudinal (along the major longitudinal axis) modes. The opt...Continue Reading

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Citations

Jun 5, 2018·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Yingying LiQuquan Wang
Dec 1, 2018·Nanoscale·Jing-Jing HuXian-Zheng Zhang
Jul 7, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Dewei ZhuMark T Swihart
Nov 4, 2020·Biomaterials·Zhongzheng YuTimothy Thatt Yang Tan
Dec 10, 2016·ACS Applied Materials & Interfaces·Hwiwon LeeSei Kwang Hahn
Apr 18, 2017·Chemistry of Materials : a Publication of the American Chemical Society·Yi XieLiberato Manna
Feb 6, 2018·Chemical Reviews·Ankit AgrawalDelia J Milliron
Sep 28, 2021·Chemical Reviews·Jiapeng ZhengJianfang Wang
Nov 23, 2021·The Journal of Physical Chemistry Letters·Suvodeep SenNarayan Pradhan

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