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The Development of CMOS Amperometric Sensing Chip with a Novel 3-Dimensional TiN Nano-Electrode Array.


ABSTRACT: An electrochemical sensing chip with an 8 × 8 array of titanium nitride three-dimensional nano-electrodes (TiN 3D-NEA) was designed and fabricated via a standard integrated complementary metal oxide semiconductor process. Each nano-electrode in 3D-NEA exhibited a pole-like structure with a radius of 100 nm and a height of 35 nm. The numeric simulation showed that the nano-electrode with a radius of around 100 nm exhibited a more uniformly distributed electric field and a much higher electric field magnitude compared to that of the microelectrode. Cyclic voltammetry study with Ru(NH?)?3+ also revealed that the TiN 3D-NEA exhibited a much higher current density than that obtained from the microelectrode by two orders of magnitude. Further studies showed that the electrocatalytical reduction of hydrogen peroxide (H?O?) could occur on a TiN 3D-NEA-based sensing chip with a high sensitivity of 667.2 mA?mM-1?cm-2. The linear detection range for H?O? was between 0.1 ?M and 5 mM with a lowest detection limit of 0.1 ?M. These results indicated that the fabricated TiN 3D-NEA exhibited high catalytic activity and sensitivity to H?O? and could be a promising sensor for H?O? measurement.

SUBMITTER: Lien CL 

PROVIDER: S-EPMC6427664 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature

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The Development of CMOS Amperometric Sensing Chip with a Novel 3-Dimensional TiN Nano-Electrode Array.

Lien Chun-Lung CL   Yuan Chiun-Jye CJ  

Sensors (Basel, Switzerland) 20190226 5


An electrochemical sensing chip with an 8 × 8 array of titanium nitride three-dimensional nano-electrodes (TiN 3D-NEA) was designed and fabricated via a standard integrated complementary metal oxide semiconductor process. Each nano-electrode in 3D-NEA exhibited a pole-like structure with a radius of 100 nm and a height of 35 nm. The numeric simulation showed that the nano-electrode with a radius of around 100 nm exhibited a more uniformly distributed electric field and a much higher electric fie  ...[more]

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