title: Monodisperse and fluorescent poly(styrene-co-methacrylic acid-co-2-naphthyl methacrylate)/Fe3O4 composite particles.
abstract: This article describes the preparation and characterization of fluorescent and magnetic composite particles of poly(styrene-co-methacrylic acid-co-2-naphthyl methacrylate) (poly(St/MAA/NMA)). First, monodisperse (D(w)/D(n)<1.1) and fluorescent poly(St/MAA/NMA) submicron particles were prepared using emulsifier-free emulsion polymerization by varying the concentration of the fluorescent comonomer, i.e., NMA. Composition of the particles was characterized by (1)H NMR, FT-IR, GPC, and DSC analyses. The molecular weights and particle size of the particles were dependent on the NMA concentration. Second, Fe(3)O(4) nanoparticles were immobilized onto the poly(St/MAA/NMA) submicron particles to give rise to multifunctional properties. The morphology and particles size were characterized by FE-SEM and CHDF. These poly(St/MAA/NMA)/Fe(3)O(4) composite particles exhibited both fluorescent properties under UV irradiation at 365 nm and magnetic properties. Photo-luminescent (PL) intensity of the particles showed linear dependence with NMA concentration.
authors.affiliation: Department of Chemical and Biomolecular Engineering, Yonsei University, 134 Shinchon-Dong, Sudaemoon-Gu, Seoul 120-749, Republic of Korea.
authors.forename: Patakamuri
authors.initials: P
authors.lastname: Govindaiah
authors.forename: Yeon Jae
authors.initials: YJ
authors.lastname: Jung
authors.forename: Jung Min
authors.initials: JM
authors.lastname: Lee
authors.forename: Tae-Joon
authors.initials: TJ
authors.lastname: Park
authors.forename: Du Yeol
authors.initials: du Y
authors.lastname: Ryu
authors.forename: Jung Hyun
authors.initials: JH
authors.lastname: Kim
authors.forename: In Woo
authors.initials: IW
authors.lastname: Cheong
mesh_terms: D002152:Calorimetry, Differential Scanning; D004655:Emulsions / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008689:Methacrylates / Q000737:chemistry*; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry*; D010316:Particle Size; D011137:Polystyrenes / Q000737:chemistry*
chemical_list: D004655:Emulsions; D005456:Fluorescent Dyes; D008689:Methacrylates; D009281:Naphthalenes; D011137:Polystyrenes; C008384:methacrylic acid