Nanophotonic Switch: Gold-in-Ga2O3 Peapod Nanowires

A novel metal–insulator heterostructure made of twinned Ga2O3 nanowires embedding discrete gold particles along the twin boundary was formed through a reaction between gold, gallium, and silica at 800 °C during simple thermal annealing. The Au-in-Ga2O3 peapods spontaneously crystallized under phase...

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Veröffentlicht in:	Nano letters 2008-10, Vol.8 (10), p.3081-3085
Hauptverfasser:	Hsieh, Chin-Hua, Chou, Li-Jen, Lin, Gong-Ru, Bando, Yoshio, Golberg, Dimitri
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Electronics Exact sciences and technology Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties Materials science Molecular electronics, nanoelectronics Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Physics Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Beschreibung
Zusammenfassung:	A novel metal–insulator heterostructure made of twinned Ga2O3 nanowires embedding discrete gold particles along the twin boundary was formed through a reaction between gold, gallium, and silica at 800 °C during simple thermal annealing. The Au-in-Ga2O3 peapods spontaneously crystallized under phase separation induced by the formation of twin boundaries. The nanostructures were analyzed by field emission scanning (FESEM) and transmission electron microscopes (FETEM), and their photoresponse was investigated using a double-frequency Nd:YAG laser with a wavelength of 532 nm on a designed single-nanowire device. The surface plasmon resonance (SPR) effects of embedded Au nanoparticles are proposed to be responsible for the remarkable photoresponse of these novel structures.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl0731567