应用飞秒激光双光子吸收还原金属离子

为了探讨利用有机高分子材料的飞秒激光双光子吸收来引发金属离子还原的可行性,在自行研制的双光子微细加工系统中,采用物质的量的比为1:1的硝酸银/聚乙烯吡咯烷酮混和凝胶进行还原试验,加工出宽25μm的线条以及4mm×0.4mm的测试导线。由X射线光电子能谱分析可知,加工生成物主要元素是银,通过测试导线电阻,测算其电阻率范围在10-3Ω·m～10-5Ω·m之间。结果表明,用双光子吸收还原金属离子,可以控制反应区域,这对加工导电金属微结构是有帮助的。

Metal ion reduction induced by femtolaser two-photon absorption

For the feasibility of metal ion reduction induced by the femtosecond laser two-photon absorption of organic polymer material,the experiments were taken in silver nitrate and polyvinylpyrrolidone film mixture at the ratio of the amount of substance of 1:1.In the developed two-photon fabrication system,a single line with the width of 25μm and a 4mm ×0.4mm plate were fabricated.The X-ray photoelectron spectrum revealed that the main element in the product was silver,and the range of resistivity from 10-3Ω·m to 10-5Ω·m was calculated by measuring the resistance.The result shows that using two-photon induced reduction of metal ions,the reaction region can be controlled well,and it is helpful for the conductive metallic microstructure fabrication.