title: Separations based on the mechanical forces of light.
abstract: A photon as a particle has an energy and a momentum. In a matter-photon interaction, the matter and photons may exchange their momenta observing the momentum conservation law. The consequence of the momentum transfer from a photon to a matter particle is a mechanical force exerted on the particle. Several separation methods based on this force of light are reviewed. Photophoresis separations for micron-sized particles and optical force chromatography for chemical-sized molecules are discussed.
authors.affiliation: School of Chemistry, Seoul National University, San 56-1, Shinlim-Dong, Kwanak-Gu, Seoul 151-747, Republic of Korea.
authors.forename: Bum Suk
authors.initials: BS
authors.lastname: Zhao
authors.forename: Yoon-Mo
authors.initials: YM
authors.lastname: Koo
authors.forename: Doo Soo
authors.initials: DS
authors.lastname: Chung