Vijayakumar G Nixon Samuel
J Nanosci Nanotechnol. 2014 Apr;14(4):3117-22. doi: 10.1166/jnn.2014.8613.
The Poly(vinyl alcohol)/copper acetate/calcium acetate sol was prepared by sol-gel route. Poly(vinyl alcohol)/copper acetate/calcium acetate composite nanofibers were synthesized by electrospinning process. These nanofibers had an average diameter of 200 nm. Calcining these fibers at 1000 degrees C produced copper oxide/calcium oxide nanofibers with average diameter of 75 nm. These fibers were characterized by Atomic Force Microscopy, Scanning Electron Microscopy, Fourier Transform Infrared spectroscopy, powder X-ray Diffraction, Ultraviolet spectroscopy, dielectric study and Second Harmonic Generation (SHG) efficiency test. Band gap energy was calculated as 4.1 eV. SHG efficiency was found to be 1.7 times than that of KDP.
通过溶胶-凝胶法制备了聚乙烯醇/醋酸铜/醋酸钙溶胶。采用静电纺丝工艺合成了聚乙烯醇/醋酸铜/醋酸钙复合纳米纤维。这些纳米纤维的平均直径为200nm。在1000℃下煅烧这些纤维得到平均直径为75nm的氧化铜/氧化钙纳米纤维。通过原子力显微镜、扫描电子显微镜、傅里叶变换红外光谱、粉末X射线衍射、紫外光谱、介电研究和二次谐波产生（SHG）效率测试对这些纤维进行了表征。计算得到带隙能量为4.1eV。发现SHG效率是磷酸二氢钾的1.7倍。
