Xian-Hua Zhang

High purity trigonal selenium nanorods growth via laser ablation under controlled temperature

By utilizing laser ablation, high purity trigonal selenium nanorods with different size have been synthesized from selenium powders. The high purity of the nanorods is attributed to freestanding growth process without catalyst or template. Its morphologies depend on both substrate temperature and reaction time. By controlling the experimental conditions, selenium nanorods with lateral dimensions in different range can be synthesized ranging from 20 nm to several hundred nanometers in width, and up to 10 μm in lengths.

Glow discharge growth of SnO2 nano-needles from SnH4Electronic supplementary information (ESI) available: diagram of the experimental setup used; Raman spectrum of the products. See http://www.rsc.org/suppdata/cc/b4/b404362f/

Single crystalline SnO(2) nano-needles with length up to 6-7 microm and diameter less than 300 nm are synthesized on an Au-coating porous silicon substrate from SnH(4) source via a glow discharge process.

Fabrication of Apatite-Type La9.33(SiO4)6O2 Hollow Nanoshells as Energy-Saving Oxidative Catalysts

Apatite-type La(9.33)(SiO(4))(6)O(2) hollow nanoshells were successfully synthesized by a controlled route. These oxide-ion-conducting hollow nanoshells were used to catalyze oxidative coupling of methane, and an enhanced catalytic performance at relatively low temperature was realized. The high-activity and energy-saving features were attributed to their hollow nanostructures and oxide ion conductivity.

Spontaneous transformation of selenium from monoclinic micro-balls to trigonal nano-rods in ethanol solution

In a solution of ethanol, Se micro-balls produced in the glow discharge of H2Se, comprising a mixture of trigonal and monoclinic phases, spontaneously converted to nano-rods with diameters of ca. 30–180 nm and lengths up to 1 µm. This solid–liquid–solid process, with high yield and low cost, may be extended to the manufacture of one-dimensional nano-materials from allotropes several hundred times larger than the nano-materials formed.

Microwave plasma growth and high spatial resolution cathodoluminescent spectrum of tetrapod ZnO nanostructures

通讯作者地址: Xie, SY (通讯作者), Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China 3. Natl Inst Mat Sci, Nanomat Lab, Tsukuba, Ibaraki 3050047 Japan

A hierarchical lattice structure and formation mechanism of ZnO nano-tetrapods

The existence of characteristic longitudinal optical and transverse optical phonons of cubic ZnO in ZnO nano-tetrapods is determined by Raman spectroscopy and first-principles calculations. Stacking sequence change at the boundary of the core and legs is also identified by high-resolution transmission electron microscopy. Based on this experimental and theoretical evidence, we demonstrate that the lattice structure of ZnO nano-tetrapods is hierarchical with a zinc blende core connecting to four wurtzite legs. Furthermore, we establish the atomic configuration and propose a formation mechanism induced by Laplace pressure in the initial growth stage of ZnO nano-tetrapods.

Starlike nanostructures of polyoxometalates K3[PMo12O40]·nH2O synthesized and assembled by an inverse microemulsion method

In a nonionic inverse microemulsion system, surfactant (C12-18EO9)/cyclohexane/water, heteropolyanions [PMo12O40]3- react with K+ to form K3[PMo12O40].nH2O nanorods and assemble as three-dimensional starlike nanostructures.

Low cytotoxicity porous Nd(2)(SiO(4))(3) nanoparticles with near infrared excitation and emission

Porous Nd(2)(SiO(4))(3) nanoparticles were successfully synthesized by a controlled route. This kind of silicate nanoparticle could be excited by near-infrared (NIR) radiation (808 nm) and triggered a NIR emission (1066 nm) at room temperature. By monitoring the 1066 nm emission, the long-lived luminescent lifetime was determined to be 19.5 µs. These NIR nanoparticles with appropriate diameters (<100 nm) were suitable for cell assays. MTT assays showed that the cytotoxicity of the porous Nd(2)(SiO(4))(3) nanoparticles was very low. Therefore, these porous silicate nanoparticles are potential biosafe high-performance NIR biolabeling materials.