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Preparation of Fluorescent Silica Nanotubes and their Application in Gene Delivery
(Wiley-VCH Verlag, 2005-02-01) Chia-Chun Chen; Y.-C. Liu; C.-H. Wu; C.-C. Yeh; M.-T. Su; Y.-C. Wu
Fluorescent silica nanotubes are synthesized through a sol–gel reaction using an anodic aluminum oxide membrane template. The nanotubes are filled with plasmid DNA encoding green fluorescence protein (GFP), which are incorporated into mammalian cells that subsequently express GFP (see Figure). The results demonstrate a novel application of nanotubes in biomolecule delivery.
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 Chen
A 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.