Institut de Recerca en Energia de Catalunya (IREC), E-08019, Barcelona, Spain.
Nanoscale. 2011 Feb;3(2):630-4. doi: 10.1039/c0nr00528b. Epub 2010 Nov 16.
Gas detection experiments were performed with individual tin dioxide (SnO2) nanowires specifically configured to observe surface ion (SI) emission response towards representative analyte species. These devices were found to work at much lower temperatures (T≈280 °C) and bias voltages (V≈2 V) than their micro-counterparts, thereby demonstrating the inherent potential of individual nanostructures in building functional nanodevices. High selectivity of our miniaturized sensors emerges from the dissimilar sensing mechanisms of those typical of standard resistive-type sensors (RES). Therefore, by employing this detection principle (SI) together with RES measurements, better selectivity than that observed in standard metal oxide sensors could be demonstrated. Simplicity and specificity of the gas detection as well as low-power consumption make these single nanowire devices promising technological alternatives to overcome the major drawbacks of solid-state sensor technologies.
进行了气体检测实验，使用专门配置的单个二氧化锡（SnO2）纳米线来观察表面离子（SI）发射对代表性分析物的响应。与微器件相比，这些器件在更低的温度（T≈280°C）和偏置电压（V≈2 V）下工作，从而展示了单个纳米结构在构建功能纳米器件方面的固有潜力。我们的小型化传感器的高选择性源于与标准电阻型传感器（RES）的不同传感机制。因此，通过采用这种检测原理（SI）以及 RES 测量，可以比在标准金属氧化物传感器中观察到的选择性更好。气体检测的简单性和特异性以及低功耗使得这些单根纳米线器件成为有前途的技术选择，可以克服固态传感器技术的主要缺点。
