Enhanced Electronic Properties of Pt@Ag Heterostructured Nanoparticles

Sensors

Anh Thi Ngoc Dao²  Derrick M. Mott²  Koichi Higashimine¹ 

[1] Center for Nano Materials and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan; E-Mail:;Department of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan; E-Mails:

关键词: silver;    platinum;    nanoparticle;    electronic transfer;    core-shell;    plasmonics;    heterostructure;   

DOI  :  10.3390/s130607813

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.