Microparticles Trapped in Holes of Plasmonic Mesh: Cataloging IR Absorption Spectra of Individual 1-5 micron Particles

“这项奖励是根据2009年美国复苏和再投资法案（公法111-5）资助的。”化学系的分析和表面化学（ASC）项目支持俄亥俄州立大学James V. Coe教授的研究项目。Coe小组开发了一种记录1-5微米尺寸范围内单个微粒子“无散射”红外（IR）吸收光谱的新方法，使用标准的FTIR成像微光谱仪，将微粒子放置在等离子体金属网的孔中。这种大小的颗粒对人类健康很重要，因为它们穿过我们的鼻子和喉咙，有效地困在我们的肺部——事实上，众所周知，死亡率随着空气中颗粒物质的增加而上升。该小组将采用这种新方法来分析空气中粉尘颗粒的化学成分，这可能对识别或量化呼吸系统健康风险很重要。这些新技术也将应用于单个酵母细胞，这些细胞比大多数红外波长范围小，并且受到大散射效应的影响。成功将广泛适用于生物科学。最后，除了在新的化学等离子体领域培训研究生外，Coe教授和他的学生还将使阿拉巴马州亨茨维尔的奥克伍德学院和加利福尼亚州卡森的加州州立大学多明戈斯山分校（CSUDH）的学生能够远程使用网络成像拉曼光谱仪。

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."The Analytical and Surface Chemistry (ASC) program of the Division of Chemistry supports the research program of Prof. James V. Coe of the Ohio State University. The Coe Group has developed a new method for recording "scatter-free" infrared (IR) absorption spectra of individual microparticles in the 1-5 micrometer size regime, using a standard FTIR imaging microspectrometer by placing a microparticle in a hole of plasmonic metal mesh. Particles of this size are important to human health because they get past our noses and throats and are efficiently trapped in our lungs - in fact death rates are known to rise with increases in airborne particulate matter. The group will employ this new method to analyze the chemical content of airborne dust particles, which may be important in identifying or quantifying respiratory health risks. These new techniques will also be applied to individual yeast cells which are smaller than most of the infrared wavelength range and subject to large scattering effects. Success would be broadly applicable in the biological sciences. Finally, in addition to the training of graduate students in the new field of plasmonics for chemistry, Prof. Coe and his students will enable the remote use of a cyber-enabled imaging Raman microspectrometer by students from Oakwood College in Huntsville, Alabama and California State University Dominguez Hills (CSUDH) in Carson,California.