Hydrogen sensing using reduced graphene oxide sheets supported by Pd nanoparticles

7th Sensors & their Applications

Yatskiv, Roman^1 ; Grym, Jan^1

Institute of Photonics and Electronics, Academy of Sciences of the Czech Republic, Chaberska 57, Prague, Czech Republic^1

关键词: Atomic hydrogen;    Hydrogen molecule;    Hydrogen-sensing;    PD nano particle;    Reduced graphene oxides;    Schottky barrier heights;    Schottky diodes;    Semiconductor substrate;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/450/1/012020/pdf
DOI  :  10.1088/1742-6596/450/1/012020

来源: IOP

【 摘 要 】

We investigated Schottky diode hydrogen sensors prepared by the deposition of reduced graphene oxide functionalized by nanocrystals of Pd on InP substrate. Schottky diodes were investigated by the measurement of current voltage characteristics and further tested for their sensitivity to hydrogen in a cell with a through-flow gas system. Pd nanocrystals which are in direct contact with the semiconductor substrate serve to dissociate hydrogen molecules into atomic hydrogen, lowering the work function of Pd, and resulting in the decreased Schottky barrier height.