Effects of inlet/outlet configurations on the electrostatic capture of airborne nanoparticles and viruses.
Effects of inlet/outlet configurations on the electrostatic capture of airborne nanoparticles and viruses.
复制标题
入口/出口配置对静电捕获空气中纳米粒子和病毒的影响。
DOI：
10.1088/0957-0233/19/6/065204
复制
发表时间：
2008
影响因子：
2.4
通讯作者：
Bashir,Rashid
中科院分区：
文献类型：
--
作者：
Jang,Jaesung;Akin,Demir;Bashir,Rashid
以悬臂式生物传感器实时捕获和检测空气中的生物制剂为动力，在不将生物制剂引入液体的情况下，我们提出了一种自制颗粒收集器的进出口结构对旋转气流下空气中100 nm直径纳米颗粒的静电捕获的影响。该颗粒收集器有三种不同的进口/出口配置：前向进口/出口（FO），后向进口/出口（BO）和直向进口/出口（SO）配置。我们还介绍了使用相同的粒子收集器静电捕获牛痘病毒，并将这些病毒测量结果与纳米粒子病例进行了比较。在FO构型中收集到的颗粒最多。在BO和SO构型中捕获的粒子数量在其标准偏差范围内接近。在流速为1.1 l min - 1，外加电位为2 kV的条件下，在中心电极C捕获的粒子数量比在其他电极捕获的粒子数量要少得多。利用商业CFD代码FLUENT，我们还模拟了三种进口/出口配置对颗粒捕获的影响，包括颗粒轨迹、速度和运动时间。实验结果表明，在流速为1.1 l min - 1时，FO结构最有利于颗粒捕获。粒子直径对捕获的影响也将被讨论。该收集器可与悬臂式生物传感器一起用于生物气溶胶的实时监测。
Motivated by capture and detection of airborne biological agents in real time with a cantilever biosensor without introducing the agents into liquids, we present the effects of inlet/outlet configurations of a homemade particle collector on the electrostatic capture of airborne 100 nm diameter nanoparticles under swirling gas flows. This particle collector has three different inlet/outlet configurations: forward inlet/outlet (FO), backward inlet/outlet (BO) and straight inlet/outlet (SO) configurations. We also present the electrostatic capture of Vaccinia viruses using the same particle collector and compare these virus measurements with the nanoparticle cases. The most particles were collected in the FO configuration. The numbers of particles captured in the BO and SO configurations were close within their standard deviations. For all the three configurations tested, the number of particles captured in the center electrode C was much smaller than those captured in the other electrodes at a flow rate of 1.1 l min− 1 and an applied potential of 2 kV. Using a commercial CFD code FLUENT, we also simulated the effects of the three inlet/outlet configurations on the particle capture in terms of particle trajectories, velocities and travel times. This simulation was in a good agreement with measurements that the FO configuration is the most favorable to particle capture among the tested configurations at a flow rate of 1.1 l min− 1. The effects of particle diameters on the capture will also be discussed. This collector can be used for real-time monitoring of bioaerosols along with cantilever biosensors.