Acquisition of a New Environmental Scanning Electron Microscope with Integrated Energy-Dispersive X-ray Analysis System

0132204daniel本拨款的资金将用于购买最先进的扫描电子显微镜（SEM），该显微镜带有环境电池，可以在可变压力下对水合样品进行成像。所谓的环境扫描电镜（ESEM）也将配置一个能量色散x射线光谱仪（EDS），以便对样品进行定量成分分析。巴克内尔大学的ESEM设施将支持克里斯·丹尼尔（变质岩石学/构造地质学）、贝丝·卡帕尔迪（昆虫学）、卡尔·柯比（环境地球化学）和玛格特·维吉安特（化学工程）及其学生在这所文理学院的研究项目。具体的研究重点包括：基于对变质相的SEM和EMP分析来研究美国西南部的元古代构造历史，以阐明它们的P-T历史和化学分区模式；研究暴露于酸性矿井废水中的岩石中发现的固体铁相与细菌的相互作用；医疗器械和工业管道上生物膜的研究和活花粉-昆虫相互作用的结构研究，以阐明昆虫的感觉结构和机制

0132204DanielFunds from this grant will support the acquisition of a state-of-the-art scanning electron microscope (SEM) with an environmental cell which allows for imaging of hydrated samples at variable pressures. The so-called environmental SEM (ESEM) will also be configured with an energy dispersive x-ray spectrometer (EDS) to allow for quantitative compositional analysis of samples. The ESEM facility at Bucknell will support the research programs of faculty members Chris Daniel (metamorphic petrology/structural geology), Beth Capaldi (entomology), Carl Kirby (environmental geochemistry) and Margot Vigeant (Chemical Engineering) and their students at this liberal arts institution. Specific research thrusts include investigations of the Proterozoic tectonic history of the southwestern U.S. based on SEM and EMP analyses of metamorphic phases to elucidate their P-T history and patterns of chemical zoning, investigations of bacterial interactions with solid iron phases found in rocks exposed to acid mine drainage, studies of biofilms on medical devices and industrial piping and structural studies of live pollen-insect interactions to elucidate insect sensory structures and mechanisms.***