Title :
Basic properties of electrolyte-oxide-semiconductor structures with applications in biochemical sensing
Author :
Hao Wang ; Jianguang Gao ; Zhuojie Chen ; Wengang Wu
Author_Institution :
Shenzhen Grad. Sch., Peking Univ., Shenzhen, China
Abstract :
We present the basic properties and potential applications of a kind of electrolyte-oxide-semiconductor (EOS) structure, which is composed of a Si layer, a SiO2 layer, and an electrolyte solution layer, from bottom to top. It is demonstrated that the EOS structures exhibit a stable one-way electrical conductivity like a diode, and there is a threshold voltage in the ON-switching process. Moreover, it is found that the thicknesses of SiO2 layers and the concentrations of electrolyte solutions affect the current density obviously. A conductive-filament model is proposed to analyze the conductivity mechanism of EOS structures. The EOS structures can be used for many biochemical applications. We have realized copper-ion detection and pH sensing by utilizing their basic characteristics.
Keywords :
biochemistry; biological techniques; copper; electrical conductivity; electrochemical sensors; electrolytes; pH measurement; positive ions; semiconductors; silicon; silicon compounds; Cu2+; EOS structure composition; ON-switching process; Si; Si layer; SiO2; SiO2 layer thickness effect; biochemical sensing applications; conductive-filament model; conductivity mechanism analysis; copper-ion detection; current density; diode; electrolyte solution concentration effect; electrolyte solution layer; electrolyte-oxide-semiconductor structure properties; one-way electrical conductivity; pH sensing; threshold voltage; Abstracts; Artificial intelligence; Earth Observing System; Films; Switches; Thickness measurement; Voltage measurement;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4799-3296-2
DOI :
10.1109/ICSICT.2014.7021217
