Changjie Mao

Aminopolycarboxyl-modified Ag2S nanoparticles : Synthesis, characterization and resonance light scattering sensing for bovine serum albumin

A novel method was proposed to prepare a series of functionalized Ag(2)S nanoparticles capped with various aminopolycarboxylic acids. The as-prepared Ag(2)S nanoparticles were characterized by UV-vis, FTIR, resonance light scattering spectra (RLS) and transmission electron microscopy (TEM). Based on the RLS intensities enhanced by BSA-induced Ag(2)S nanoparticles aggregation, a sensitive RLS method for the detection BSA at nanogram levels was established. The detection limits for BSA are between 8.6 and 112.6ngmL(-1), depending on the different capping agents. The effects of various capping agents on the detection limits of BSA have been investigated. The detection limit is found to be dependent on the stability constant (logK(MY)) of the silver-aminopolycarboxyl complexes.

Sonochemical fabrication of 8-hydroxyquinoline aluminum (Alq3) nanoflowers with high electrogenerated chemiluminescence.

Well-defined Alq(3) nanoflowers were fabricated via a facile and fast sonochemical route. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize the structure and shape of the as-prepared product. The results showed that the resulting Alq(3) was composed of nanobelts with thickness about 50 nm, average widths of 200 nm, and length up to 10 μm. The Alq(3) nanoflowers exhibited good electrogenerated chemiluminescence behavior.

The synthesis of PbF2 nanorods in a microemulsion system

Single-crystalline PbF2 nanorods with a diameter of 100?500?nm and length of 1?10??m have been successfully synthesized by a simple sonochemical route in a microemulsion system at room temperature. The morphologies and structures of the nanorods were characterized by x-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and high-resolution transmission electron microscopy. The experimental results showed that polyethylene glycol 6000 played an important role in the formation of PbF2 nanorods. Room-temperature photoluminescence measurements indicated that the as-prepared PbF2 nanorods had strong green emission, which could have potential applications in optoelectronic devices.