Localized Gas Phase Transport: Fundamental Research and Applications

局部气相传输：基础研究与应用

• 批准号: 314615063
• 负责人: Professor Dr. Heiko Jacobs, since 4/2021
• 金额: --
• 依托单位: Fachgebiet Nanotechnologie (NANO)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/314615063?language=en
• 关键词: Localized; Gas; Phase; Transport; Fundamental

This interdisciplinary proposal is at the cross-section of Aerosol science and the collection and detection of Airborne particles. The proposal describes the investigation of a new transport mechanism that we discovered, which supports the localized collection of airborne particles at a higher rate than previously possible. Strongly simplified the process is a directed electrodynamic transport process. The mechanism, as far as it is understood, is based on the interplay between high mobility gas ions with airborne particles, a patterned substrate, and a carrier gas. The process leads to localized collection and concentration of airborne particles at predetermined sensing points on a patterned substrate. The discovered process is applicable to a wide range of particle sizes (15 orders of magnitude so far in terms of particle weight, 102 Da to 3x1017Da) and types (organic and inorganic). In a first publication in Nature communications [1] we demonstrate that the collection process is several orders of magnitudes faster than the commonly used diffusion only transport. Despite the fact that the process is only poorly understood several immediate applications followed. For example in a publication [2] entitled >Localized Collection of Airborne Analytes: A Transport Driven Approach to Improve the Response Time of Existing Gas Sensor Designs< the increased deposition rate was applied to detect airborne molecules. In the subsequent publication [3] entitled >Active Matrix Based Collection of Airborne Analytes: An Analyte Recording Chip Providing Exposure History and Finger Print< the idea of an analyte recording chip is discussed. In a fourth [4] and very different application the discovered process was use to collect metallic nanoparticles to grow freestanding point to point nanowire bridges at high rates. The specific project targets the fundamental study of the underlying process and applications. For example, from a theoretical transport equation point of view the observed abnormally high collection rate cannot be explained unless the reaction kinetics (sticking coefficient) is different. The proposed process utilizes the interplay between charged ions, airborne particles, a pattered substrate with programmable charge dissipating contact points, and a carrier gas. The installation of an experimental platform is proposed to gain access to the relevant process parameter (gas ion concentration, particle number concentration, localized gas flow, ionic dissipation current, and potential profile). From an application point of view we would like to focus on the recently published idea [3] which describes a generic approach to collect airborne analytes in an active matrix type fashion on chip sized substrates. Finally, we would like to extend the range of analyte particles to include Airborne pathogens within the field of aerovirobiology. In preparation for the proposal we have conducted first experiments with airborne Bacteriophages.

该跨学科的建议是在气溶胶科学的横截面以及空气中颗粒的收集和检测中。该提案描述了我们发现的一种新运输机制的研究，该机制以比以前可能更高的速率支持了机载颗粒的局部收集。强烈简化了该过程是一个定向的电动力传输过程。据了解，该机制基于高迁移率气体离子与机载颗粒，图案化基板和载气之间的相互作用。该过程导致在图案化的基板上预定的传感点处的空气颗粒的局部收集和浓度。发现的过程适用于各种颗粒大小（迄今为止在粒子重量，102 da至3x1017da）和类型（有机和无机的15个数量级）。在自然通信的第一个出版物中[1]我们证明，收集过程是比通常仅使用扩散运输的几个幅度阶数。尽管该过程仅了解了几个即时应用程序。例如，在出版物中[2]>“机载分析物的局部收集：运输驱动的方法”来改善现有气体传感器设计的响应时间<升高的沉积速率被应用以检测​​机载分子。在随后的出版物[3]中，题为>基于主动矩阵的机载分析物的集合：讨论了分析物记录芯片，提供暴露历史和指纹<分析物记录芯片的想法。在第四个[4]和非常不同的应用中，发现的过程用于收集金属纳米颗粒，以高速率生长独立点纳米线桥。特定项目针对基础过程和应用的基本研究。例如，从理论传输方程式的角度来看，除非反应动力学（粘附系数）不同，否则观察到的异常高的收集率无法解释。提出的过程利用了带电离子，空气颗粒，具有可编程电荷耗散接触点的模式的基板和载气之间的相互作用。提出了实验平台的安装，以访问相关的过程参数（气离心浓度，颗粒数浓度，局部气流，离子耗散电流和潜在轮廓）。从应用的角度来看，我们想关注最近发表的想法[3]，该想法描述了一种以芯片尺寸底物上活跃矩阵类型的方式收集空气寄宿分析物的通用方法。最后，我们想扩展分析物颗粒的范围，以在空气病毒学领域中包括空气传播的病原体。为了准备该提案，我们已经进行了空中噬菌体的首次实验。