Liquid Concentration Sensing Properties of Microfibers with a Nanoscale-Structured Film  

作　　者：周国瑞 吕海兵 袁晓东 周海 刘昊 李可欣 程晓锋 苗心向 

机构地区：[1]Laser Fusion Research Center,China Academy of Engineering Physics

出　　处：《Chinese Physics Letters》2015年第3期45-48,共4页中国物理快报（英文版）

摘　　要：A type of compact solution concentration sensor based on a microfiber with a nanoscale-structured film is proposed and demonstrated experimentally. Additional loss at different solution concentrations is calculated by means of the three-dimensional finite-difference time-domain （3D-FDTD） method. The microfiber is fabricated by using the flame-heated scanning technique. Nanoscale-structured film is coated on the microfiber surface, which is assembled as a sensing unit. The sensitivity of this kind of sensor increases with the decreasing diameters of the microfiber. When the diameter of the microfiber is 2 #m, a minimum concentration sensitivity of 1% （under 450s measuring time） is demonstrated in the experiment. Higher sensitivity can be attained when the solution concentration is higher. The sensing properties of this microfiber with the nanoscale-structured film may provide opportunities for new applications in optical sensing devices.A type of compact solution concentration sensor based on a microfiber with a nanoscale-structured film is proposed and demonstrated experimentally. Additional loss at different solution concentrations is calculated by means of the three-dimensional finite-difference time-domain （3D-FDTD） method. The microfiber is fabricated by using the flame-heated scanning technique. Nanoscale-structured film is coated on the microfiber surface, which is assembled as a sensing unit. The sensitivity of this kind of sensor increases with the decreasing diameters of the microfiber. When the diameter of the microfiber is 2 #m, a minimum concentration sensitivity of 1% （under 450s measuring time） is demonstrated in the experiment. Higher sensitivity can be attained when the solution concentration is higher. The sensing properties of this microfiber with the nanoscale-structured film may provide opportunities for new applications in optical sensing devices.

关 键 词：Liquid Concentration Sensing Properties of Microfibers with a Nanoscale-Structured Film 

分 类 号：TQ340.1[化学工程—化纤工业] TB383.1[一般工业技术—材料科学与工程]