Formation Of Low-dimensional Nanomaterials By Arc Plasma

Nanotechnology makes the means and capability of recognizing and rebuilding of the physical world extend to the level of atom and molecule.The nanomaterial is the basis of the application of nanotechnology.It is a hotspot in the present research of the materials science.According to the different phase of materials,preparation methods are to be divided into three classes:solid phase reaction,liquid phase reaction and gas phase reaction.This paper mainly introduces the way of preparation and characterization of the low dimension of nanomaterials.The structure, morphology and character of the nanomaterials were employed by the X-ray diffraction(XRD)(D/Max-2400X),transmission election microscopy(TEM, JEM-2100EX),high resolution transmission electronmicroscopy(HRTEM, JEM-2010),field emission scanning electron microscope(FE-SEM,Hitachi S-4800), photoluminescence apparatus(PL,Shimadzu RF-5301) and so on.The important results are as follows:(â… ) Formation of Si nanowires1,Si nanowires were synthesized by cathode arc plasma.2,TEM and SEM images indicate that the as-prepared Si nanowires have uniform diameters of between 10-20nm.3,The growth mechanism of the Si nanowires have been discussed and illustrated.4,The photoluminescence of the as-prepared Si nanowires have been investigated.(â…¡) Formation of the SbSn nanotubes1.SnSb nanotubes are successfully prepared by heat treatment of pure SnSb nano-sized particles which were obtained by DC arc discharge.2.TEM and SEM images indicate that the as-prepared SnSb nanotubes have rough surfaces and a uniform diameter of about 200 nm.3.A possible growth mechanism of the SnSb nanotubes was proposed.(â…¢) Sb₂S₃ nano-flakes prepared via hydro-thermal method 1.Sb₂S₃ nano-flakes are successfully prepared by hydro-thermal treatment of pure Sb₂O₃ nano-sized particles which were obtained by DC arc discharge.2.TEM and SEM results show that the product prepared in neutral solution (ph=7) is Sb₂S₃ nano-flakes with a uniform thickness of about 20nm.3.The band gap of the as-prepared Sb₂S₃ nano-flakes is about 1.72eV according to its absorption spectra of UV and visible.