Hig-sensitivity Detection of H2S by ZnO Nanowires

基于氧化锌（ZnO）纳米线可以实现非常灵敏的硫化氢（H2S）传感器。H2S在肺部和其他疾病的医学诊断以及治疗中变得越来越重要。经过初步实验，已经显示出所需的灵敏度下降到50 ppb的范围，我们希望提高和了解这种传感器在这个项目中的选择性，稳定性和再现性。为此，我们必须详细研究柱生长的技术，在其表面上沉积纳米颗粒以提高灵敏度，通过不同制备的传感器阵列的信号的交叉相关来确保选择性的可能性，如何解决测量过程的可再现起始条件，以及如何加速它。在一系列实验中，在不同的典型气体混合物的环境中，存在于空气中，也存在于不同温度下，我们希望加深对ZnO表面和表面以下过程的理解纳米线总体目标是为这一雄心勃勃的诊断任务准备简单可靠的传感器。

Very sensitive sensors for hydrogen sulphide (H2S) can be realized based on zinc oxide (ZnO) nanowires. H2S becomes more and more important in medical diagnosis of lung and other diseases, and also in therapy. After preliminary experiments which have already shown the required sensitivity down to the 50 ppb range, we want to improve and understand the selectivity, stability and reproducibility of such sensors in this project. For this purpose, we have to look in detail into the technology for the growth of pillars, the deposition of nanoparticles on their surface for improved sensitivity, possibilities to ensure selectivity by cross-correlation of the signal of differently prepared arrays of sensors, how to settle reproducible starting conditions for the measurement process, and how to accelerate it. In a series of experiments in an ambient with different mixtures of typical gas-es present in air and also at different temperatures we want to deepen the understanding of the processes going on at and below the surface of the ZnO nanowires. The overall aim is the preparation of simple and reliable sensors for this ambitious diagnosis task.