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Forest and Disordered Carbon Nanotubes: Sensitivity Improvement of Electrochemical Detection in Miniaturized Devices

机译：森林和无序碳纳米管：小型化装置中电化学检测的敏感性提高

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Miniaturization is a well-established trend in the development of analytical devices, due to the important advantages it offers. Detection for this type of devices has to be in accordance and therefore easy integration and the employment of simple instrumentation are common requirements. These are fulfilled very well by the electrochemical detection (ED) and therefore, it is gaining relevance in many of the applications where miniaturized approaches are required. However, the use of very small sample volumes (i.e. in the case of microchip electrophoresis, ME) implies the use of very sensitive techniques. Even when this is the case of amperometry, sensitivity improvement is still needed. With this aim, nanotechnological approaches can be envisaged. Carbon nanotubes (CNTs) are one of the nanostructures that, from their discovery, remain generating relevant applications due to the possibilities and advantages they offer. Due to their conductive properties, they have been widely used as electrode modifiers. In this work, CNTs are directly grown on a glass surface and evaluated for electroanalytical purposes. However, simply by varying the procedure slightly, materials with very different properties can be obtained. For example, different configurations, vertically and non-vertically aligned CNTs, provide different analytical characteristics. Therefore, a careful choice of the nanomaterial has to be made in order to obtain the best performance of the devices.
机译：由于提供的重要优势，小型化是分析设备的开发的良好趋势。对这种类型的设备的检测必须是​​较轻的，因此简单地集成，简单仪器的就业是常见要求。通过电化学检测（ED）非常良好地满足这些，因此，在需要小型化方法的许多应用中，它正在增加相关性。然而，使用非常小的样品体积（即在微芯片电泳的情况下，ME）意味着使用非常敏感的技术。即使这是电流测量的情况，仍然需要灵敏度改善。通过这种目标，可以设想纳米技术方法。碳纳米管（CNT）是纳米结构之一，从他们的发现，由于它们提供的可能性和优势，仍然会产生相关应用。由于它们的导电性能，它们已被广泛用作电极改性剂。在这项工作中，CNT直接在玻璃表面上生长并评估用于电解学目的。然而，只需稍微改变过程，可以获得具有非常不同性质的材料。例如，不同的配置，垂直和非垂直对齐的CNT，提供不同的分析特性。因此，必须进行仔细选择纳米材料以获得设备的最佳性能。

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