Fluorescent-magnetic Janus particles prepared via seed emulsion polymerization.
Anisotropic polymeric colloidal or Janus particles possessing simultaneous magnetic and fluorescent properties were successfully prepared via the swelling-diffusion or the in situ emulsion polymerization method. In the swelling-diffusion process, magnetic emulsions (an organic ferrofluid dispersed in aqueous medium) were synthesized and used for seeds of submicron magnetic Janus particles. After swelling the anisotropic particles obtained by 1-pyrene-carboxaldehyde fluorescent dye dissolved in tetrahydrofuran, well-defined fluorescent-magnetic Janus particles were produced. In the in situ emulsion polymerization, styrene monomer mixed with fluorescent dye monomers, i.e., 1-pyrenylmethyl methacrylate (PyMMA) or fluorescein dimethacrylate (FDMA), and an oil-soluble initiator (2,2'-azobis(2-isobutyronitrile)) were emulsified in the presence of magnetic seed emulsions. The confocal microscopic images showed the fluorescent-magnetic Janus particles with high fluorescent intensity when a fluorescent crosslinker monomer FDMA was employed.
University of Lyon, F-69622 Lyon, France, University Lyon 1, Villeurbanne, CNRS, UMR 5007, LAGEP-CPE, 43 Bd. 11 Novembre 1918, F-69622 Villeurbanne, France; Department of Chemistry, Faculty of Science, Mahidol University, Phyathai, Bangkok 10400, Thailand.
Chariya
C
Kaewsaneha
University of Lyon, F-69622 Lyon, France, University Lyon 1, Villeurbanne, CNRS, UMR 5007, LAGEP-CPE, 43 Bd. 11 Novembre 1918, F-69622 Villeurbanne, France.
Ahmad
A
Bitar
Department of Chemistry, Faculty of Science, Mahidol University, Phyathai, Bangkok 10400, Thailand. Electronic address: pramuan.tan@mahidol.ac.th.
Pramuan
P
Tangboriboonrat
National Nanotechnology Center (NANOTEC), Thailand Science Park, PathumThani 12120, Thailand.
Duangporn
D
Polpanich
University of Lyon, F-69622 Lyon, France, University Lyon 1, Villeurbanne, CNRS, UMR 5007, LAGEP-CPE, 43 Bd. 11 Novembre 1918, F-69622 Villeurbanne, France. Electronic address: elaissari@lagep.univ-lyon1.fr.
Abdelhamid
A
Elaissari
D003102:Colloids / Q000737:chemistry*; D004655:Emulsions / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D059346:Magnets / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry*; D044367:Phase Transition; D058105:Polymerization; D011721:Pyrenes / Q000737:chemistry*
D003102:Colloids; D004655:Emulsions; D005456:Fluorescent Dyes; D008689:Methacrylates; D011721:Pyrenes; C030984:pyrene
Anisotropic hybrid particle; Fluorescent-magnetic particle; Janus particle