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

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

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.

Original language	English
Article number	109050
Journal	Vacuum
Volume	172
DOIs	https://doi.org/10.1016/j.vacuum.2019.109050
Publication status	Published - Feb 2020
Externally published	Yes

Keywords

Dopamine
Platinum (Pt) membrane
Reduction-oxidation
Schottky contact
Sensor

ASJC Scopus subject areas

Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films

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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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year = "2020",

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

language = "English",

volume = "172",

journal = "Vacuum",

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TY - JOUR

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

Abstract

Keywords

ASJC Scopus subject areas

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