Synthesis of tailored core–brush polymer particles via a living radical polymerization and architecture of colloidal crystals

• Published in: Journal of Colloid and Interface Science Vol. 353; no. 1; pp. 69 - 75
• Main Authors: Ishizu, Koji, Amir, Isamu, Okamoto, Nobuyuki, Uchida, Satoshi, Ozawa, Masaaki, Chen, Hui
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 2011; Elsevier BV; Elsevier
• Subjects: Brushes; Chemistry; Colloidal crystals; Colloidal state and disperse state; Colloids; color; Core-shell particles; Core–brush particles; Crosslinking; Crystals; Exact sciences and technology; General and physical chemistry; glass; glutaraldehyde; Hyperbranched structure; nanoparticles; particle size; PHEMA; Photo-induced ATRP; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Polymerization; polymers; Radicals; thiocarbamates; wavelengths; Colloidal crystals; Core–brush particles; Hyperbranched structure; Photo-induced ATRP; Particle size; Nanoparticle; Crystals; Glass; Polymerization; Polymer; Reflection; Grafting; Core-brush particles; Wavelength; Particle; Substrate; Hema; Synthesis; Structure
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2010.08.067

Synthesis of core–shell polymer particle. [Display omitted] ► Core–brush polymer particles (BP) were prepared by grafting from a photo-induced ATRP with 2-hydroxyethyl methacrylate (HEMA) initiated by photo-functional polymer particles (EP) having N, N-diethyldithiocarbamate (DC) groups at surface. ► We constructed colloidal crystals (CC) of BP and locked CC by cross-linking of PHEMA brush phases with glutaraldehyde. ► The peak wavelength (λ max) in the reflection spectra agreed well with the bandgap position for light incident on the (1 1 1) face of face-centered cubic (fcc) lattice according to Bragg’s law. Narrow disperse core–brush polymer nanoparticles (BP) were synthesized by grafting from photo-induced atom transfer radical polymerization (ATRP) of 2-hydroxyethyl methacrylate (HEMA) from N, N-diethyldithiocarbamate (DC) groups of core–shell particle surface. We constructed colloidal crystals of these particles by depositing on glass substrate. By variation of the particle size, the brilliant color could be varied throughout the visible spectrum. We locked also permanently such colloidal crystals by cross-linking of poly(2-hydroxyethyl methacrylate) (PHEMA) brush phases with glutaraldehyde. The peak wavelength ( λ max) in the reflection spectra agreed well with the bandgap position for light incident on the (1 1 1) face of face-centered cubic (fcc) lattice according to Bragg’s law.