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Selective surface reactions for Janus ORMOSIL particles with multiple functional groups using an ordered monolayer film at liquid–liquid interface

Jung, Chan Yoon, Kim, Jung Soo, Kim, Hae Sung, Ha, Jung Min, Kim, Sun Taek, Lim, Hyung Jun, Koo, Sang Man
Journal of colloid and interface science 2012 v.367 no.1 pp. 257-263
Fourier transform infrared spectroscopy, X-ray diffraction, chemical reactions, confocal laser scanning microscopy, nuclear magnetic resonance spectroscopy, scanning electron microscopy, transmission electron microscopy
Monodispersed, submicron-sized Janus ORMOSIL particles with multiple functional groups were prepared by the selective surface reaction of a monolayer film formed at a hexane–water interface. A well-ordered monolayer film was obtained by self-assembly of ORMOSIL particles with multiple functional groups at hexane–water interface. The photopolymerization of an ordered monolayer containing ORMOSIL particles yields a rigid film strong enough to maintain its integrity for transfer and further chemical reaction. The chemical reaction of this ordered film with organic and inorganic functional groups produced Janus ORMOSIL particles with multiple functional groups. The morphologies, structures, and chemical compositions of monolayer films and Janus ORMOSIL particles were characterized by FT-IR, solid state NMR, X-ray diffraction (XRD), optical microscopy (OM), electron microscopies (SEM and TEM), and confocal laser scanning microscopy.