Synthesis and Characterization of Silver (Core)/Layered Double Hydroxides (Shell) Nanoparticles (original) (raw)

2012

Abstract

Layered double hydroxide (LDH) is well-known for its versatile capability of electrostatic binding or intercalation of anions. Nanoparticles (NPs) based on Ag core and LDH shell, with surface plasmon resonance (SPR) of Ag for hyperthermia and drug intercalation capability in LDH shell, hold promise in Nanomedicine. Herein, for the first time, noble metal, Ag, (core)/(Mg2+, Al3+)-LDH (shell) NPs were synthesized. Morphology, composition and SPR of obtained core/shell NPs were fully characterized. Core/shell NPs of 45 nm Ag NP core with various LDH shell thickness from 10 to 15 nm were obtained. For the 45 nm Ag NP core, the wavelength for transverse SPR absorption was 395 nm, which red-shifted up to 430 nm at a LDH shell thickness of 15 nm. Parallelly, the synthesis and characterization of the Ag nanorod are also reported. Exhibition of longitudinal SPR absorption in the targeted near infrared range make it a more appropriate core.

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