教師著作
Permanent URI for this collectionhttp://rportal.lib.ntnu.edu.tw/handle/20.500.12235/37076
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Item Organic Solvent Dependence of Plasma Resonance of Gold Nanorods: A Simple Relationship(ELSEVIER, 2005-12-16) J. Yang; J.-C. Wu; Y.-C. Wu; J.-K. Wang; Chia-Chun ChenWe report a theoretical and experimental study to reveal the linear relationship between the square of the peak position of the longitudinal plasmon mode of gold nanorods and the square of medium refractive indices. It is predicted theoretically and confirmed experimentally. The linear relationship indicates that gold nanorods can potentially be exploited as a new optical platform to develop novel, specific, sensitive and miniaturized biological sensors after suitable surface modification.Item Controlled Growth of Aluminium Nitride Nanorod Arrays via Chemical Vapour Deposition(IOP Publishing, 2006-06-14) J. Yang; T.-W. Liu; C.-W. Hsu; L.-C. Chen; K.-H. Chen; Chia-Chun ChenLarge-area and high-density arrays of AlN nanorods were synthesized at low temperature via a template-free and catalyst-free chemical vapour deposition. The quasi-aligned AlN nanorods were identified to grow along the c-axis and preferentially orient with their growth direction perpendicular to the substrate. Further studies showed that the AlN nanorods were grown on a buffer layer formed at the beginning of the reaction. By changing the flow rate of the carrier gas at the beginning of the reaction, we successfully obtained nanorods with different orientations on the substrate. The Raman spectrum and cathodoluminescence spectrum of the AlN nanorods at room temperature reveal the existence of oxygen-related defects in the nanorods.Item A Chain-Structure Nanotube: Growth and Characterization of Single-Crystal Sb2S3 Nanotubes via a Chemical Vapor Transport Reaction(Wiley-VCH Verlag, 2004-04-01) J. Yang; Y.-C. Lin; H.-M. Liu; Chia-Chun ChenSingle-crystal Sb2S3 nanotubes with chain-like structures (see Figure) have been successfully synthesized by chemical vapor transport using sulfur as the transport agent. Detailed characterization of the nanotubes shows the growth direction of Sb2S3 nanotubes is determined by the crystallographic orientation of the chain-like building blocks. A mechanism explaining the formation of the nanotubes is presented.Item Synthesis and Characterization of Core-Shell GaP@GaN and GaN@GaP Nanowires(American Chemical Society, 2003-04-09) H.-M. Lin; Y.-L. Chen; J. Yang; Y.-C. Liu; K.-M. Yin; J.-J. Kai; F.-R. Chen; L.-C. Chen; Y.-F. Chen; Chia-Chun ChenA convenient thermal CVD route to core−shell GaP@GaN and GaN@GaP nanowires is developed. The structural analyses indicate that the nanowires exhibit a two-layer and wirelike structure. High-resolution transmission electron microscopy (HRTEM) images reveal misfit dislocation loops at the interface of the nanowires. Unusual temperature dependences of the photoluminescence (PL) intensity of GaP@GaN nanowires are observed, and they are interpreted by the piezoelectric effect induced from lattice mismatch between two semiconductor layers. In the Raman spectra of GaN@GaP nanowires, an unexpected peak at 386 cm-1 is found and assigned to a surface phonon mode.