Reversible Modulation of Surface Plasmons in Gold Nanoparticles Enabled by Surface Redox Chemistry
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
| Original language | English |
|---|---|
| Pages (from-to) | 8948-8951 |
| Journal / Publication | Angewandte Chemie - International Edition |
| Volume | 54 |
| Issue number | 31 |
| Publication status | Published - 1 Jul 2015 |
| Externally published | Yes |
Link(s)
Abstract
Switchable surface redox chemistry is demonstrated in gold@iron/iron oxide core-shell nanoparticles with ambient oxidation and plasmon-mediated reduction to modulate the oxidation state of shell layers. The iron shell can be oxidized to iron oxide through ambient oxidation, leading to an enhancement and red-shift of the gold surface plasmon resonance (SPR). This enhanced gold SPR can drive reduction of the iron oxide shell under broadband illumination to reversibly blue-shift and significantly dampen gold SPR absorption. The observed phenomena provide a unique mechanism for controlling the plasmonic properties and surface chemistry of small metal nanoparticles. Switchable surface redox chemistry is demonstrated in gold@iron/iron oxide core-shell nanoparticles. The iron shell can be oxidized to iron oxide through ambient oxidation, leading to an enhancement and red-shift of the gold surface plasmon resonance (SPR). The gold SPR in turn can drive reduction of the iron oxide shell under broadband illumination to reversibly blue-shift and significantly dampen gold SPR absorption.
Research Area(s)
- core-shell nanoparticles, gold nanocrystals, iron, surface plasmon resonance, surface redox chemistry
Bibliographic Note
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Citation Format(s)
Reversible Modulation of Surface Plasmons in Gold Nanoparticles Enabled by Surface Redox Chemistry. / Li, Zheng; Foley, Jonathan J.; Peng, Sheng et al.
In: Angewandte Chemie - International Edition, Vol. 54, No. 31, 01.07.2015, p. 8948-8951.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
