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Electrochemical albumin sensing based on silicon nanowires modified by gold nanoparticles

机译：基于金纳米粒子修饰的硅纳米线的电化学白蛋白传感

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摘要

Si nanowires (SiNWs) were modified by Au nanoparticles (AuNPs) using a self-assembled monolayer of aminopropyltriethoxysilane (APTES) and used for direct sensing of the bovine serum albumin (BSA). It was shown that repeated thermal treatment of the sensor greatly enhanced the reliability of the SiNW sensor by increasing the electrical conductivity largely from carbonization of the APTES molecules and from bringing the AuNPs in intimate contact with the SiNW surface. The AuNP-modified SiNW array sensor was able to detect 1-7 μM of BSA. The sensor exhibited a good sensitivity over the tested concentration range and linear behavior. It is expected that the proposed label-free biosensor can be further developed to selectively detect and quantify biomolecules other than BSA.
机译：Si纳米线（SiNWs）使用氨基丙基三乙氧基硅烷（APTES）的自组装单分子层通过Au纳米颗粒（AuNPs）进行了修饰，并用于直接检测牛血清白蛋白（BSA）。结果表明，传感器的重复热处理大大提高了APTES分子的碳化作用，并使AuNP与SiNW表面紧密接触，从而大大提高了SiNW传感器的可靠性。经AuNP修饰的SiNW阵列传感器能够检测1-7μM的BSA。该传感器在测试浓度范围和线性行为方面均表现出良好的灵敏度。预期可以进一步开发提出的无标记生物传感器，以选择性地检测和定量除BSA以外的生物分子。

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  • 来源
    《Applied Surface Science》 |2011年第10期|p.4650-4654|共5页
  • 作者

    Dae Hoon Kwon; Hyeun Hwan An; Hee-Soo Kim; Jong Ho Lee; Sang Hee Suh; Young Ho Kim; Chong Seung Yoon;

  • 作者单位

    Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea;

    Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea;

    Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea;

    Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea;

    Center for Nanostructured Materials Technology, Korea Institute of Science and Technology, Seoul, Republic of Korea;

    Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea;

    Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Amperometric; Silicon nanowire; Gold nanoparticle; Albumin; APTES;

    机译：安培;硅纳米线;金纳米粒子;白蛋白;APTES;

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