Qiang Zou

Impact of heating temperature and time on the morphology of synthetic zinc oxide nanowires

In this study, in order to obtain the optimal fabricating condition, the influences of heating temperature and time on the fabrication of zinc oxide (ZnO) nanowires are clarified. During this proce...

Fabrication of novel biological substrate based on photolithographic process for surface enhanced Raman spectroscopy

In this paper, a novel surface-enhanced Raman scattering (SERS) substrate based on Integrated Circuit (IC) process was designed, using photolithography, etching and other processes on the silicon wafer processing. Its surface morphology and Raman activity were characterized and tested. The relationship between the substrate’s photolithographic pattern and its Raman activity, stability and reproducibility has been analyzed and verified, and some suggestions for improvement of processing steps were given. This substrate can be used for the detection of biological proteins and provides a powerful research tool for life science and analytical chemistry research.

Assembly-line flash synthesis of ZnO nanobelts on metal Zn

In this study, ZnO nanobelts were successfully fabricated by flash synthesis without any expensive catalyst at a relatively low temperature (600∘C). The whole process took just ∼30 min. Introducing a solution tank containing a mixture of polyvinyl alcohol (PVA) and Zn(AC)2, was an auxiliary process to elevate the quality of the products. The morphology of the ZnO nanobelts was systematically investigated by means of field emission scanning electron microscopy (FRSEM) and high-resolution transmission electron microscopy (HRTEM). The products had an average width of 200nm and a length of more than 10μm. X-ray diffraction analysis indicated that the ZnO nanobelts had a typical wurtzite structure. Finally, the growth mechanism of the unique morphology of the ZnO nanobelts is discussed. An assembly-line production method is also proposed based on the results.

Impact of various reactant concentrations on the morphology and photoluminescence property of synthetic ZnO nanobelts

In this paper, ZnO nanobelts have been partially high-quality synthesized employing diverse reactant mass ratios between zinc acetate [Zn(AC)2] and polyvinyl alcohol (PVA) without any catalyst. The maximum temperature required for the whole reaction process is no more than 650∘C. The morphologies of ZnO nanomaterials fabricated from distinct reactant concentrations have been systematically investigated by means of field-emission scanning electron microscopy (FESEM). X-ray diffraction (XRD) analysis identifies that ZnO nanobelts exhibit a typical wurtzite structure. Through fluorescence spectrometer, the photoluminescence (PL) spectra generated by ZnO nanomaterials corresponding to different reactant concentrations have disparate peak intensities and luminescence wavelengths. This phenomenon indicates that novel-synthesized ZnO nanomaterial shows great potential in changing the optical properties of light-emitting devices. In addition, synthetic ZnO nanobelts exhibit excellent UV emission capability.