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首页> 外文期刊>The Analyst >Inside/outside Pt nanoparticles decoration of functionalised carbon nanofibers (Pt19.2/f-CNF80.8) for sensitive non-enzymatic electrochemical glucose detection
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Inside/outside Pt nanoparticles decoration of functionalised carbon nanofibers (Pt19.2/f-CNF80.8) for sensitive non-enzymatic electrochemical glucose detection

机译：用于灵敏的非酶电化学葡萄糖检测的功能化碳纳米纤维（Pt 19.2 / f-CNF 80.8 ）的内部/外部Pt纳米颗粒装饰

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摘要

A highly efficient and reproducible approach for effective Pt nanoparticles dispersion and excellent decoration (inside/outside) of functionalised carbon nanofibers (f-CNF) is presented. The surface morphological, compositional and structural characterisations of the synthesised Pt19.2/f-CNF80.8 material were examined using transmission electron microscopy (TEM/STEM/DF-STEM), energy-dispersive X-ray spectrometry (EDS), thermogravimetric analysis (TGA/DTG), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) was employed in order to confirm the typical electrochemical response for Pt. The aim of the work was to improve the utility of both the supporting matrix (via the use of both inner/outer surfaces of nanofibers) and precious Pt, together with the sensitive glucose determination. TEM data indicated successful nanoparticle decoration with average Pt particle size 2.4 nm. The studies demonstrated that utilisation of the inner surface of the nanofibers, together with the modified outer surface characteristics using chemical treatment, enables excellent decoration, effective dispersion and efficient impregnation of Pt nanoparticles on carbon nanofibers. Pt19.2/f-CNF80.8 exhibited excellent amperometric response (sensitivity = 22.7 μAmM−1cm−2 and LoD = 0.42 μM) towards direct glucose sensing, over the range 0–10 mM glucose, in neutral conditions (pH 7.4). The improved carbon surface area for nanoparticle decoration, inner surface structure and morphology of nanofibers together with the presence of functional groups provided strong interactions and stability. These features together with the effective nanoparticle dispersion and decoration resulted in excellent catalytic response. The decorated nanoscaled material (Pt19.2/f-CNF80.8) is capable of large scale production, providing sensing capability in neutral conditions, while eliminating the temperature sensitivity, pH and lifetime issues associated with glucose enzymatic sensors and holds great promise in the quantification of glucose in real clinical samples. A highly efficient and reproducible approach for effective Pt nanoparticles dispersion and excellent decoration (inside/outside) of functionalised carbon nanofibers (f-CNF) is presented. The surface morphological, compositional and structural characterisations of the synthesised Pt19.2/f-CNF80.8 material were examined using transmission electron microscopy (TEM/STEM/DF-STEM), energy-dispersive X-ray spectrometry (EDS), thermogravimetric analysis (TGA/DTG), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) was employed in order to confirm the typical electrochemical response for Pt. The aim of the work was to improve the utility of both the supporting matrix (via the use of both inner/outer surfaces of nanofibers) and precious Pt, together with the sensitive glucose determination. TEM data indicated successful nanoparticle decoration with average Pt particle size 2.4 nm. The studies demonstrated that utilisation of the inner surface of the nanofibers, together with the modified outer surface characteristics using chemical treatment, enables excellent decoration, effective dispersion and efficient impregnation of Pt nanoparticles on carbon nanofibers. Pt19.2/f-CNF80.8 exhibited excellent amperometric response (sensitivity = 22.7 µAmM–1cm–2 and LoD = 0.42 µM) towards direct glucose sensing, over the range 0-10 mM glucose, in neutral conditions (pH 7.4). The improved carbon surface area for nanoparticle decoration, inner surface structure and morphology of nanofibers together with the presence of functional groups provided strong interactions and stability. These features together with the effective nanoparticle dispersion and decoration resulted in excellent catalytic response. The decorated nanoscaled material (Pt19.2/f-CNF80.8) is capable of large scale production, providing sensing capability in neutral conditions, while eliminating the temperature sensitivity, pH and lifetime issues associated with glucose enzymatic sensors and holds great promise in the quantification of glucose in real clinical samples.
机译：提出了一种高效且可重现的方法，用于有效地分散Pt纳米颗粒并实现功能化碳纳米纤维（f-CNF）的出色装饰（内部/外部）。使用透射电子显微镜（TEM / STEM / DF-STEM）观察了合成的Pt 19.2 / f-CNF 80.8 材料的表面形貌，组成和结构特征-色散X射线光谱（EDS），热重分析（TGA / DTG），X射线衍射（XRD）和X射线光电子能谱（XPS）。使用循环伏安法（CV）来确定Pt的典型电化学响应。这项工作的目的是改善支持基质（通过使用纳米纤维的内/外表面）和珍贵的铂两者的实用性，并同时进行灵敏的葡萄糖测定。 TEM数据表明成功的纳米粒子装饰具有2.4nm的平均Pt粒径。研究表明，利用纳米纤维的内表面以及通过化学处理改善的外表面特性，可以使碳纳米纤维上的Pt纳米粒子具有出色的装饰性，有效的分散性和有效的浸渍性。 Pt 19.2 / f-CNF 80.8 表现出出色的电流响应（灵敏度= 22.7μAmM -1 cm −2 和LoD = 0.42μM），在中性条件下（pH 7.4），可在0-10 mM葡萄糖范围内直接进行葡萄糖感测。用于纳米颗粒装饰的改进的碳表面积，纳米纤维的内表面结构和形态以及官能团的存在提供了强大的相互作用和稳定性。这些特征以及有效的纳米颗粒分散和修饰导致了出色的催化响应。装饰的纳米级材料（Pt 19.2 / f-CNF 80.8 ）能够大规模生产，在中性条件下提供传感能力，同时消除了温度敏感性，pH和寿命葡萄糖酶传感器相关的问题，并在实际临床样品中的葡萄糖定量中具有广阔的前景。提出了一种高效且可重现的方法，用于有效地分散Pt纳米颗粒并实现功能化碳纳米纤维（f-CNF）的出色装饰（内部/外部）。使用透射电子显微镜（TEM / STEM / DF-STEM）观察了合成的Pt 19.2 / f-CNF 80.8 材料的表面形貌，组成和结构特征-色散X射线光谱（EDS），热重分析（TGA / DTG），X射线衍射（XRD）和X射线光电子能谱（XPS）。使用循环伏安法（CV）来确定Pt的典型电化学响应。这项工作的目的是改善支持基质（通过使用纳米纤维的内/外表面）和珍贵的铂两者的实用性，并同时进行灵敏的葡萄糖测定。 TEM数据表明成功的纳米粒子装饰具有2.4nm的平均Pt粒径。研究表明，利用纳米纤维的内表面以及通过化学处理改善的外表面特性，可以使碳纳米纤维上的Pt纳米粒子具有出色的装饰性，有效的分散性和有效的浸渍性。 Pt 19.2 / f-CNF 80.8 表现出出色的电流响应（灵敏度= 22.7 µAmM –1 cm –2 和LoD = 0.42 µM）可在中性条件（pH 7.4）下，在0-10 mM葡萄糖范围内直接进行葡萄糖感测。用于纳米颗粒装饰的改进的碳表面积，纳米纤维的内表面结构和形态以及官能团的存在提供了强大的相互作用和稳定性。这些特征以及有效的纳米颗粒分散和修饰导致了出色的催化响应。装饰的纳米级材料（Pt 19.2 / f-CNF 80.8 ）能够大规模生产，在中性条件下提供传感能力，同时消除了温度敏感性，pH和寿命葡萄糖酶传感器相关的问题，并在实际临床样品中的葡萄糖定量中具有广阔的前景。

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  • 来源
    《The Analyst》 |2012年第7期|p.1639-1648|共10页
  • 作者

    Baljit Singh; Eithne Dempsey; Calum Dickinson; Fathima Laffir;

  • 作者单位

    . Centre for Research in Electroanalytical Technologies (CREATE),Institute of Technology Tallaght, Tallaght, Ireland;

    1. Centre for Research in Electroanalytical Technologies (CREATE),Institute of Technology Tallaght, Tallaght, Ireland;

    1. Materials Surface;

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