Papers by Author: Li Guo Ma

Abstract: Direct electroless nickel plating on n-Si(100) wafers in alkaline solutions was performed without any activation procedure in advance. The effect of pH and temperature on the size of deposited metal particles was examined. Moreover, The phosphorus contents of deposits were also analyzed by the energy disperse spectroscopy. The results indicated that the optimal reaction temperature was 60°C and the optimal pH value was 10.0 with a plating rate of about 3.0 µm/hr and the phosphorus content of about 3.6 wt%.

Abstract: The degradation reaction of cellulose under the condition of microwave irradiation in an acidic aqueous medium including H2O2 has been investigated. The main factors, the solution acidity, reaction temperature and time, can have an effect on the cellulose degradation. The cellulose oxidative degradable polymerization was associated mainly with the action of releasing from H₂O₂. The scheme reflecting the main pathways of cellulose degradation in the reaction system of HCl/ H₂O₂ is proposed. A comparative study was investigated to evaluate the effects of microwave and conventional heating on cellulose degradation.