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

3 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
172
DOIs
出版狀態已發佈 - 二月 2020
對外發佈Yes

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films

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