MRI: Acquisition of a Scanning Tunneling and Force Microscope to Enhance Undergraduate Research Opportunities in Electrochemistry and Biochemistry

MRI：购买扫描隧道显微镜和力显微镜以增加电化学和生物化学方面的本科生研究机会

• 批准号: 0116162
• 负责人: Kevin Johnson
• 金额: $ 10.7万
• 依托单位: Pacific University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0116162&HistoricalAwards=false
• 关键词: MRI; Acquisition; Scanning; Tunneling; Force

This award from the Major Research Instrumentation (MRI) will enable the Department of Chemistry at Pacific University to acquire an atomic force microscope/scanning tunneling microscope (AFM/STM) to enhance undergraduate research opportunities in electrochemistry and biochemistry. This equipment will enhance research in two major projects: a) the structural effects and consequences of electrochemical processes at commercially important lithium-ion cell graphite anodes will be studied in situ; and b) the study of aggregation phenomena on cell surfaces in aqueous environments. The scanning tunneling microscope (STM) enables researchers to image atoms directly. The technique uses the piezoelectric effect which involves bringing an extremely sharp metal needle within a few angstroms of the sample surface. The distance is small enough for electrons to leak or tunnel across the gap and generate a minute current. As the gap between the tip and the sample increases, the current decreases. As the probe crosses the sample, moving back and forth across the surface, it traces out a contour map of the sample's surface atoms. The AFM is used in the control of material used to fabricate semiconductor circuits.

来自主要研究仪器（MRI）的这一奖项将使太平洋大学化学系能够获得原子力显微镜/扫描隧道显微镜（AFM/STM），以提高电化学和生物化学的本科生研究机会。该设备将加强两个主要项目的研究：a）将现场研究具有重要商业意义的锂离子电池石墨阳极的电化学过程的结构效应和后果;以及B）研究水环境中电池表面的聚集现象。扫描隧道显微镜（STM）使研究人员能够直接对原子进行成像。该技术使用压电效应，其中包括将一个非常尖锐的金属针带到样品表面的几埃范围内。该距离足够小，以使电子泄漏或穿过差距并产生微小电流。当针尖和样品之间的差距增大时，电流减小。当探针穿过样品，在表面上来回移动时，它会描绘出样品表面原子的等高线图。AFM用于控制用于制造半导体电路的材料。