Pd films on soft substrates:a visual,high-contrast and low-cost optical hydrogen sensor

查看全文 作　　者：Xiaoyi [1,2]She;Yang [1]Shen;Jianfang [3]Wang;Chongjun [1]Jin

机构地区：[1]State Key Laboratory of Optoelectronic Materials and Technologies,School of Materials Science and Engineering,Sun Yat-sen University,Guangzhou 510275,China;[2]School of Electronics and Information Technology,Sun Yat-sen University,Guangzhou 510275,China;[3]Department of Physics,the Chinese University of Hong Kong,Shatin,Hong Kong SAR,China

出　　处：《Light(Science & Applications)》索引2019年第8卷第1期,共10页

基　　金：the financial support from the National Natural Science Foundation of China(11574406,11504437,11874436,61604179,and 11374376);the Key Project of the NSF of Guangdong Province(no.2016A030311049);the Fundamental Research Funds for the Central Universities(no.17lgpy07). 摘　　要：For the rapid development of the hydrogen economy,a reliable and low-cost hydrogen sensor appears to be extremely important.Here,we first show that a palladium film deposited on polydimethylsiloxane(PDMS)can obtain an exceedingly high-reflectance contrast of 25.78 over the entire visible band upon exposure to 4 vol% hydrogen gas(H2)mixed with nitrogen gas.This high-reflectance contrast results from the surface deformation induced by the volume inflation after exposure to H2,leading to the transition of the near-specular surface to a diffusing surface.In addition,a change in brightness is readable by naked eye upon exposure to H2 with various concentrations from 0.6 to 1 vol% under the illumination of a fluorescent tube.Furthermore,this sensor possesses an excellent recyclability and quick response time of a few seconds.Compared with Pd nanostructure-based hydrogen sensors,this visual,high-contrast and low-cost sensor is of great potential for practical hydrogen sensing. 关键词：DEFORMATION COST VISUAL

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Pd films on soft substrates:a visual,high-contrast and low-cost optical hydrogen sensor

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