REAL

Reversible Shape Transition: Plasmonic Nanorods in Elastic Nanocontainers

Gergely-Fülöp, Eszter and Nagy, Norbert and Deák, András (2013) Reversible Shape Transition: Plasmonic Nanorods in Elastic Nanocontainers. MATERIALS CHEMISTRY AND PHYSICS, 141 (1). pp. 343-347. ISSN 0254-0584

[img] Text
MatChemPhys_Reversible_141_343.pdf
Restricted to Registered users only

Download (2MB) | Request a copy

Abstract

We demonstrate the reversible rod-to-sphere shape transition of gold/mesoporous silica core/shell nanorods, where the shell acts as an elastic nanocontainer during the shape change. It is shown, that elongated core/shell nanorods are transformed into spherical core/shell particles at 300 °C. The anisometric shape of the composite particles can be recovered upon in-situ seeded growth of the gold core. The mesoporous silica shell acts as a nanoscale confinement, enabling control over the growth procedure during the chemical reaction. The shell of the particles was found to be elastic; it shows conformal shape-change with the core material during the heating and the subsequent seeded growth process. The effect of the reaction conditions during the seeded growth on the resulting particle morphology was also investigated. It is demonstrated, that depending on the growth conditions, core/shell nanorods or larger core/shell nanospheres can be obtained. The shape transformation cycle can be repeated for the same system several times, where the break-up of the confining shell represents the physical limit of the process.

Item Type: Article
Uncontrolled Keywords: gold nanoparticle; plasmonics; Langmuir-Blodgett film; heat treatment; shape transformation
Subjects: Q Science / természettudomány > QD Chemistry / kémia > QD02 Physical chemistry / fizikai kémia
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 02 Sep 2013 12:28
Last Modified: 02 Sep 2013 12:28
URI: http://real.mtak.hu/id/eprint/6371

Actions (login required)

Edit Item Edit Item