Publications by authors named "Xingtang Zhang"
Liquid-phase exfoliated graphene sheets are promising candidates for printing electronics. Here, a high-performance printed 2.4 GHz graphene-based antenna is reported.
View Article and Find Full Text PDFA single-crystalline ZnO nanorod array with rectangular cross-sections has been synthesized, in which the as-obtained products are a complete metastable zinc blende (ZB) phase. X-ray powder diffraction, electron microscopy, and elemental maps have been used to show that the ZB-ZnO samples have a lattice constant a = 4.580 Å, and are free from contamination by hexagonal wurtzite (HW) ZnO.
View Article and Find Full Text PDFNovel reverse micelles of high CTAB concentration were successfully developed to synthesize MnOOH (manganese oxyhydroxide) nanorods with uniform diameters of about 10 nm and up to 200 nm in length under mild solution conditions and Mn3O4 nanorods with the same morphology could be obtained by calcining the precursors at 450 degrees C. The morphology and microstructure of the nanorods were investigated by transmission electron microscopy (TEM and HRTEM), XRD and TGA. The results showed that the concentration of CTAB was a key factor for the formation of MnOOH nanorods and only above 0.
View Article and Find Full Text PDF[Influence of different sol-gel systems on the luminescence of nanocrystalline ZnO powders].
Guang Pu Xue Yu Guang Pu Fen Xi
November 2005
Article Synopsis
- ZnO nanopowders were created using sol-gel techniques with two different solvents, and their microstructure was analyzed using XRD and TEM methods.
- Both ZnO samples exhibit similar crystal structures and energy band characteristics, showing comparable photoluminescence (PL) spectra in the ultraviolet range.
- However, the visible region PL spectra differ due to the effects of the solvent polarity on the configuration and distribution of surface states in the samples.
[Influence of different sol-gel system on the luminescence of nanocrystalline ZnO powder].
Guang Pu Xue Yu Guang Pu Fen Xi
August 2005
Article Synopsis
- ZnO nanopowders were created using sol-gel techniques with two different solvents, and their microstructure was analyzed using XRD and TEM.
- Both ZnO samples exhibited similar crystal and energy band structures, along with comparable ultraviolet region photoluminescence (PL) spectra.
- However, their visible region PL spectra differed due to the varying polarity of the solvents, which affected the configuration and distribution of surface states in the samples.
[Preparation and luminescence of CeOx/ZnO nanocomposite powders].
Guang Pu Xue Yu Guang Pu Fen Xi
June 2005
CeOx/ZnO nanocomposite powders were prepared by sol-gel process. The powder samples were examined by XRD, TEM, XPS and photoluminescence (PL). PL enhancement of nanocomposite powder at 502 nm compared to pure ZnO was observed when Ce3+ were present in samples.
View Article and Find Full Text PDFStructural properties and Raman spectroscopy of lipid Langmuir monolayers at the air-water interface.
Colloids Surf B Biointerfaces
April 2005
Spectra of octadecylamine (ODA) Langmuir monolayers and egg phosphatidylcholine (PC)/ODA-mixed monolayers at the air-water interface have been acquired. The organization of the monolayers has been characterized by surface pressure-area isotherms. Application of polarized optical microscopy provides further insight in the domain structures and interactions of the film components.
View Article and Find Full Text PDF[Study on the preparation of nanometer oxide SnO2 gas-sensitive material by sol-gel method].
Guang Pu Xue Yu Guang Pu Fen Xi
February 2003
Article Synopsis
- * XRD results confirmed that the SnO2 particles achieved an ideal nanosize, with the particle diameter increasing as the annealing temperature was raised.
- * Raman and UV spectra revealed that the SnO2 material had significant O-empties at low temperatures and stable absorption properties in a temperature range of 300-500 degrees C, which could improve the performance of SnO2 gas-sensitive devices.