Sensing characteristics of dopamine using Pt/n-Si structure

Anisha Roy; Siddheswar Maikap; Pei Jer Tzeng; Jiantai Timothy Qiu

doi:10.1016/j.vacuum.2019.109050

Sensing characteristics of dopamine using Pt/n-Si structure

Anisha Roy, Siddheswar Maikap, Pei Jer Tzeng, Jiantai Timothy Qiu

研究成果: 雜誌貢獻 › 文章 › 同行評審

5 引文斯高帕斯（Scopus）

摘要

Dopamine sensing using a simple Pt/n-Si structure is investigated for the first time. Polycrystalline Pt membrane with a thickness of 3 nm in Pt/n-Si structure is observed by high-resolution transmission electron microscope image. This Pt/n-Si structure shows a good pH sensitivity of 0.58/pH by measuring current-time response at pH values from 2 to 10. Repeatable and stable sensing of dopamine with a low concentration of 10 pM are obtained. Dopamine with long concentration range of 10 pM to 1 μM is measured and the sensing mechanism is due to Schottky barrier height modulation through reduction-oxidation of Pt membrane in contact of dopamine. This study is useful for future early diagnosis of Parkinson's disease.

原文	英語
文章編號	109050
期刊	Vacuum
卷	172
DOIs	https://doi.org/10.1016/j.vacuum.2019.109050
出版狀態	已發佈 - 2月 2020
對外發佈	是

ASJC Scopus subject areas

儀器
凝聚態物理學
表面、塗料和薄膜

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10.1016/j.vacuum.2019.109050

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title = "Sensing characteristics of dopamine using Pt/n-Si structure",

abstract = "Dopamine sensing using a simple Pt/n-Si structure is investigated for the first time. Polycrystalline Pt membrane with a thickness of 3 nm in Pt/n-Si structure is observed by high-resolution transmission electron microscope image. This Pt/n-Si structure shows a good pH sensitivity of 0.58/pH by measuring current-time response at pH values from 2 to 10. Repeatable and stable sensing of dopamine with a low concentration of 10 pM are obtained. Dopamine with long concentration range of 10 pM to 1 μM is measured and the sensing mechanism is due to Schottky barrier height modulation through reduction-oxidation of Pt membrane in contact of dopamine. This study is useful for future early diagnosis of Parkinson's disease.",

keywords = "Dopamine, Platinum (Pt) membrane, Reduction-oxidation, Schottky contact, Sensor",

author = "Anisha Roy and Siddheswar Maikap and Tzeng, {Pei Jer} and Qiu, {Jiantai Timothy}",

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doi = "10.1016/j.vacuum.2019.109050",

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T1 - Sensing characteristics of dopamine using Pt/n-Si structure

AU - Roy, Anisha

AU - Maikap, Siddheswar

AU - Tzeng, Pei Jer

AU - Qiu, Jiantai Timothy

PY - 2020/2

Y1 - 2020/2

N2 - Dopamine sensing using a simple Pt/n-Si structure is investigated for the first time. Polycrystalline Pt membrane with a thickness of 3 nm in Pt/n-Si structure is observed by high-resolution transmission electron microscope image. This Pt/n-Si structure shows a good pH sensitivity of 0.58/pH by measuring current-time response at pH values from 2 to 10. Repeatable and stable sensing of dopamine with a low concentration of 10 pM are obtained. Dopamine with long concentration range of 10 pM to 1 μM is measured and the sensing mechanism is due to Schottky barrier height modulation through reduction-oxidation of Pt membrane in contact of dopamine. This study is useful for future early diagnosis of Parkinson's disease.

AB - Dopamine sensing using a simple Pt/n-Si structure is investigated for the first time. Polycrystalline Pt membrane with a thickness of 3 nm in Pt/n-Si structure is observed by high-resolution transmission electron microscope image. This Pt/n-Si structure shows a good pH sensitivity of 0.58/pH by measuring current-time response at pH values from 2 to 10. Repeatable and stable sensing of dopamine with a low concentration of 10 pM are obtained. Dopamine with long concentration range of 10 pM to 1 μM is measured and the sensing mechanism is due to Schottky barrier height modulation through reduction-oxidation of Pt membrane in contact of dopamine. This study is useful for future early diagnosis of Parkinson's disease.

KW - Dopamine

KW - Platinum (Pt) membrane

KW - Reduction-oxidation

KW - Schottky contact

KW - Sensor

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Sensing characteristics of dopamine using Pt/n-Si structure

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ASJC Scopus subject areas

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