MRI: Acquisition of a Multi-Beam SEM/FIB for Multidisciplinary Materials Study and Training

多束扫描电子显微镜（SEM）与聚焦离子束（FIB）相结合，具有切割材料和提供具有非常高分辨率的纳米级图像的能力。购买这种仪器将使来自土木工程、电气工程、化学、生物学、材料科学和物理学的研究人员能够在杰克逊州立大学（JSU）进行基础多学科研究。主要的研究活动包括努力提高对1/新的微生物技术的认识，以加强土壤，减少地震造成的损害2/用磁性纳米粒子处理耐多药细菌沙门氏菌的新方法和3/加强燃料电池的开发，减少污染。 该仪器将成为JSU研究基础设施的关键要素。SEM/FIB将用于本科生和研究生课程，并将促进与周边大学和国家工程研究中心的伙伴关系和合作活动。这种先进的SEM/FIB仪器的铣削深度可达100 nm，图像分辨率为2.5 nm。 这种能力将使岩土工程研究人员能够确定生物介导的土壤材料的3D微米和纳米尺度结构，从而发现从表面看不到的微生物诱导的方解石沉淀。研究人员将监测动三轴试验后分层粉砂砾石混合物微观结构特征的变化，提高对分层收缩土复合材料液化行为的理解。SEM/FIB将用于表征极端环境条件下地质聚合物复合材料与涂有搪瓷的钢筋之间的界面粘结。 SEM/FIB将允许化学研究人员表征细菌的3D结构以及细菌与具有混合氧化石墨烯的纳米颗粒之间的相互作用，用于无标记生物传感。生物学研究人员将使用该设备研究工程纳米材料对健康的影响。物理学家、电气工程师和材料科学家将使用SEM/FIB研究燃料电池组件的3D内部形态和相关的质荷传输行为，以开发新一代燃料电池。

The multi-beam scanning electron microscope (SEM) coupled with a focused ion beam (FIB) has the capability to cut materials and to provide nano-scale images with very high resolution. Acquisition of this instrumentation will enable fundamental multidisciplinary research at Jackson State University (JSU) by researchers from civil engineering, electrical engineering, chemistry, biology, material science, and physics. Key research activities include efforts to advance knowledge on 1/ new microbial technologies to strengthen soils to reduce damage from earthquakes 2/novel approaches to treat the multi-drug-resistant bacteria Salmonella with magnetic nanoparticles and 3/ enhanced fuel cell development, which reduces pollution. The instrumentation will become a key element of JSU's research infrastructure. The SEM/FIB will be used in undergraduate and graduate courses and will promote partnerships and collaborative activities with surrounding universities and national engineering research centers.This advanced SEM/FIB instrumentation has a milling depth up to 100nm, with image resolutions of 2.5 nm. This capability will allow geotechnical engineering researchers to determine the 3D micro- and nano-scale structure of bio-mediated soil materials, enabling discovery of microbial induced calcite precipitation not visible from the surface. Researchers will monitor the change in micro-structural features of stratified silt-sand-gravel mixtures after dynamic triaxial tests, improving understanding of the liquefaction behavior of stratified contractive soil composites. The SEM/FIB will be used to characterize the interfacial bonding between geopolymer composites and reinforcing steel coated with enamel under extreme environmental conditions. The SEM/FIB will allow chemistry researchers to characterize the 3D structure of bacteria and the interaction between bacteria and nanoparticles with hybrid graphene oxide for label-free biosensing. Researchers in biology will use the equipment to study the health effects of engineered nanomaterials. Physicists, electrical engineers, and material scientists will use the SEM/FIB to study the 3D internal morphology and related mass/charge transport behavior of fuel cell components to develop a new generation of fuel cell.