Selective Detection of Cu2+ Ions by Immobilizing Thiacalix[4]arene on Graphene Field-Effect Transistors.,ACS Omega

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Selective Detection of Cu2+ Ions by Immobilizing Thiacalix[4]arene on Graphene Field-Effect Transistors.
ACS Omega ( IF 3.7 ) Pub Date : 2019-12-26 , DOI: 10.1021/acsomega.9b03821
Yuki Takagiri ₁ , Takashi Ikuta ₁ , Kenzo Maehashi ₁

Affiliation

Highly accurate quantitative detection of heavy metals is essential for environmental pollution monitoring and health safety. Here, for selective detection of Cu2+ ions with high sensitivity, thiacalix[4]arene (TCA) immobilized on graphene field-effect transistors (G-FETs) are developed. Our proposed TCA-immobilized G-FETs are successfully used to detect Cu2+ ions at concentrations ranging from 1 μM to 1 mM via changes in their transfer characteristics. Moreover, the measured transfer characteristics clearly shift only when Cu2+ ions are introduced in the buffer solution despite it containing other metal ions, including those of Na+, Mg2+, Ni2+, and Cd2+; this selective detection of Cu2+ ions is attributed to the planar arrangement of TCA on graphene. Therefore, TCA-immobilized G-FETs selectively detect Cu2+ with high sensitivity.

中文翻译：

通过将 Thiacalix[4] 芳烃固定在石墨烯场效应晶体管上选择性检测 Cu2+ 离子。

高精度重金属定量检测对于环境污染监测和健康安全至关重要。为了高灵敏度地选择性检测 Cu2+ 离子，开发了固定在石墨烯场效应晶体管 (G-FET) 上的 thiacalix[4] 芳烃 (TCA)。我们提出的 TCA 固定 G-FET 通过改变其转移特性成功地用于检测浓度范围为 1 μM 至 1 mM 的 Cu2+ 离子。此外，只有当缓冲溶液中引入 Cu2+ 离子时，测量的传输特性才会发生明显变化，尽管缓冲溶液中还含有其他金属离子，包括 Na+、Mg2+、Ni2+ 和 Cd2+ 离子。这种对 Cu2+ 离子的选择性检测归因于石墨烯上 TCA 的平面排列。因此，固定 TCA 的 G-FET 可以高灵敏度选择性地检测 Cu2+。

更新日期：2020-01-14

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