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Sensors 2013, 13(6), 7813-7826; doi:10.3390/s130607813

Enhanced Electronic Properties of Pt@Ag Heterostructured Nanoparticles

1
Department of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
2
Center for Nano Materials and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
*
Author to whom correspondence should be addressed.
Received: 2 May 2013 / Revised: 11 June 2013 / Accepted: 14 June 2013 / Published: 18 June 2013
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Abstract

Platinum coated by silver nanoparticles was synthesized, which displays a unique structure where polycrystalline platinum particles are completely encapsulated in continuous monocrystalline silver shells. These particles display accentuated electronic properties, where the silver shells gain electron density from the platinum cores, imparting enhanced properties such as oxidation resistance. This electron transfer phenomenon is highly interfacial in nature, and the degree of electron transfer decreases as the thickness of silver shell increases. The nanoparticle structure and electronic properties are studied and the implication to creating sensing probes with enhanced robustness, sensitivity and controllable plasmonic properties is discussed. View Full-Text
Keywords: silver; platinum; nanoparticle; electronic transfer; core-shell; plasmonics; heterostructure silver; platinum; nanoparticle; electronic transfer; core-shell; plasmonics; heterostructure
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Dao, A.T.N.; Mott, D.M.; Higashimine, K.; Maenosono, S. Enhanced Electronic Properties of Pt@Ag Heterostructured Nanoparticles. Sensors 2013, 13, 7813-7826.

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