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首页> 外文期刊>Organic Electronics >Ultra-low noise PEDOT:PSS electrodes on bacterial cellulose: A sensor to access bioelectrical signals in non-electrogenic cells
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Ultra-low noise PEDOT:PSS electrodes on bacterial cellulose: A sensor to access bioelectrical signals in non-electrogenic cells

机译：超低噪声PEDOT：细菌纤维素上的PSS电极：用于在非电气细胞中进入生物电信号的传感器

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摘要

This study is focused on the particular advantages of organic-based devices to measure cells that do not generate action potentials, also known as non-electrogenic cells. While there is a vast literature about the application of organic conductors to measure neurons, cardiomyocytes and brain tissues, electrical measurements of non-electrogenic cells are rare. This is because non-electrogenic cells generate weak signals with frequencies below 1 Hz. Designing low noise devices in a millihertz frequency range is extremely challenging due to the intrinsic thermal and 1/f type noise generated by the sensing electrode. Here, we demonstrate that the coating of cellulose nanofibers with conducting PEDOT:PSS ink allows the fabrication of a nanostructured surface that establishes a low electrical double-layer resistance with liquid solutions. The low interfacial resistance combined with the large effective sensing area of PEDOT:PSS electrodes minimizes the thermal noise and lowers the amplitude detection limit of the sensor. The electrode noise decreases with frequency from 548 nV r.m.s at 0.1 Hz to a minimum of 6 nV r.m.s for frequencies higher than 100 Hz. This low noise makes it possible to measure low frequency bioelectrical communication signals, typical of non-electrogenic cells, that have until now been difficult to explore using metallic-based microelectrode arrays. The performance of the PEDOT:PSS-based electrodes is demonstrated by recording signals generated by populations of glioma cells with a signal-to-noise ratio as high as 140.
机译：该研究专注于有机基础装置的特定优点，以测量不产生动作电位的细胞，也称为非电池。虽然有关于有机导体的应用来测量神经元，心肌细胞和脑组织的巨大文献，但非电细胞的电测量稀有。这是因为非电气细胞产生频率低于1 Hz的弱信号。由于感测电极产生的固有的热和1 / F噪声，在Millhertz频率范围内设计低噪声器件非常具有挑战性。在这里，我们证明了具有导电型材的纤维素纳米纤维纤维素：PSS油墨允许制造纳米结构的表面，该表面与液体溶液建立低电双层电阻。与PEDOT的大有效感测区域结合的低界面电阻：PSS电极最小化了热噪声并降低了传感器的幅度检测限。电极噪声随频率从548 NV窄的频率降低至0.1Hz至最小6nv r.m.S，用于高于100Hz的频率。这种低噪声使得可以测量典型的非电池的低频生物电信信号，其直到现在难以使用金属基微电极阵列探索。 PEDOT的性能：基于PSS的电极通过以高达140的信噪比产生的胶质瘤细胞产生的信号记录信号。

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  • 来源
    《Organic Electronics》 |2020年第10期|105882.1-105882.10|共10页
  • 作者

    Pedro M.C. Inacio; Maria C.R. Medeiros; Tiago Carvalho; Rute C. Felix; Ana Mestre; Peter C. Hubbard; Quirina Ferreira; Jorge Morgado; Ana Charas; Carmen S.R. Freire; Fabio Biscarini; Deborah M. Power; Henrique L. Gomes;

  • 作者单位

    Universidade do Algarve Faculdade de Ciencias e Tecnologia 8005-139 Faro Portugal Institute de Telecomunicacoes Avenida Rovisco Pais 1 1049-001 Lisboa Portugal Center of electronics optoelectronics and telecommunications (CEOT) Universidade do Algarve;

    Institute de Telecomunicacoes Departamento de Engenharia Electrotecnica e Computndores Universidade de Coimbra 3030-290 Coimbra Portugal;

    CICECO - Aveiro Institute of Materials Department of Chemistry University of Aveiro 3810-193 Aveiro Portugal;

    Universidade do Algarve Faculdade de Ciencias e Tecnologia 8005-139 Faro Portugal Centro de Ciencias do Mar Universidade do Algarve 8005-139 Faro Portugal;

    Universidade do Algarve Faculdade de Ciencias e Tecnologia 8005-139 Faro Portugal Institute de Telecomunicacoes Avenida Rovisco Pais 1 1049-001 Lisboa Portugal;

    Centro de Ciencias do Mar Universidade do Algarve 8005-139 Faro Portugal;

    Institute de Telecomunicacoes Avenida Rovisco Pais 1 1049-001 Lisboa Portugal;

    Institute de Telecomunicacoes Avenida Rovisco Pais 1 1049-001 Lisboa Portugal Department of Bioengineering Institute Superior Tecnico University of Lisbon Avenida Rovisco Pais 1 1049-001 Lisboa Portugal;

    Institute de Telecomunicacoes Avenida Rovisco Pais 1 1049-001 Lisboa Portugal;

    CICECO - Aveiro Institute of Materials Department of Chemistry University of Aveiro 3810-193 Aveiro Portugal;

    Dipartimento di Scienze della Vita Universita di Modena e Reggio Emilia Via Campi 103 41125 Modena Italy Center for Translational Newophysiology Istituto Italiano di Tecnologia Via Fossato di Mortara 17-19 44100 Ferrara Italy;

    Universidade do Algarve Faculdade de Ciencias e Tecnologia 8005-139 Faro Portugal Centro de Ciencias do Mar Universidade do Algarve 8005-139 Faro Portugal;

    Universidade do Algarve Faculdade de Ciencias e Tecnologia 8005-139 Faro Portugal Institute de Telecomunicacoes Avenida Rovisco Pais 1 1049-001 Lisboa Portugal;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    PEDOT:PSS; Printed electronics; Bacterial cellulose; Extra-cellular electrodes; Non-excitable cells;

    机译：PEDOT：PSS;印刷电子;细菌纤维素;细胞外电极;不可激发的细胞;

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