ESEM在微注入条件下的湿环境研究及原位实验  

Preliminary of wet environments and in-situ experiments in ESEM with micro-injector conditions

作　　者：张隐奇[1] 王丽[1] 卫斌[1] 吉元[1] 高景峰[2] 郭建秋[2] 

机构地区：[1]北京工业大学固体微结构与性能研究所,北京100022 [2]北京工业大学环境与能源工程学院,北京100022

出　　处：《电子显微学报》2008年第1期38-42,共5页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(No.60171024、No.50508001);北京市教委基金项目(KN200610005030)资助~~

摘　　要：采用在环境扫描电镜(ESEM)中配置的微注入系统(MIS),原位观察了NaCl晶体的溶解和结晶过程,NH4VO3液体与Bi(NO3)3液体反应生成的BiVO4晶体,以及水处理微生物在"湿环境"中的真实形貌特征。注入的液滴量可通过调整脉冲宽度可变的MIS微阀(开关时间为ms量级)及ESEM样品室的环境参数加以控制。在300Pa^750 Pa的样品室环境压力范围,水滴的直径约200μm^300 nm,水滴在样品表面的影响范围与液滴尺寸相当,约300μm。By using a micro-injector system （MIS） setup in an environmental scanning electron microscope （ESEM）, the dissolvingcrystallization processes of NaCl crystals, the reactive product of BiVO4 crystal obtained by NHVO3 and Bi（NO3 ）3 solutions, and the real topographic feature of the microorganisms for the sewage disposal were observed in-situ. The injected amount of a droplet could be controlled via a variable length pulse microvalve（ the switch time is ms level）of the MIS and the environmental parameters of the ESEM chamber. Under the chamber pressures of 300 Pa - 750 Pa, the size of the water droplet was 200 μm- 300 μm in diameter and the impact region of the water droplet on the sample surface was corresponding to the droplet size, i.e. , - 300μm.

关 键 词：微注入 环境扫描电镜(ESEM) 原位观察 

分 类 号：TN304[电子电信—物理电子学]