title: Molecular spectroscopy of a single aerosol particle.
abstract: The absorption spectrum of a single micrometer-sized aerosol particle is measured for the first reported time in the IR. Particle absorption is determined through the IR modulation of visible scattered light near a structure resonance. This technique, termed structure resonance modulation spectroscopy, is used to measure the IR absorption spectrum of an (NH(4))(2)SO(4) aerosol droplet of 5.4-microm diameter in the region from 970 to 1280 cm(-1). The resulting spectrum, when fitted by Mie theory, enables one to determine the molecular composition of the droplet.
authors.forename: S
authors.initials: S
authors.lastname: Arnold
authors.forename: M
authors.initials: M
authors.lastname: Neuman
authors.forename: A B
authors.initials: AB
authors.lastname: Pluchino