Scatter-Free IR Absorption Spectra of Individual, 3-5 mu m, Airborne Dust Particles Using Plasmonic Metal Microarrays: A Library of 63 Spectra

作者：Cilwa Katherine E^*; McCormack Matthew; Lew Michelle; Robitaille Christophe; Corwin Lloyd; Malone Marvin A; Coe James V

来源：Journal of Physical Chemistry C, 2011, 115(34): 16910-16919.

DOI：10.1021/jp205383h

While the concentration of airborne particulate matter is well-known to be correlated with people's health, a chemical evaluation must also be important. Noting that airborne dust particles in the 3-5 mu m size regime are among the largest that get into people's lungs, such particles were collected by pumping air through plasmonic metal films with a 12.6 mu m square lattice of 5 mu m square holes. Capture of a dust particle in a metallic hole enables the recording of "scatter-free" infrared absorption spectra whose peaks reveal the infrared active components. The study of the spectra of individual particles allows minority components to be characterized in a way that is quite incisive which is difficult with bulk samples. A library of 63 spectra of individual particles captured from our laboratory air is presented along with a preliminary analysis of the contributing components.

• 出版日期2011-9-1