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Microspheres with Tunable Refractive Index by Controlled Assembly of Nanoparticles
Author(s) -
Kim ShinHyun,
Cho YoungSang,
Jeon SeogJin,
Eun Tai Hee,
Yi GiRa,
Yang SeungMan
Publication year - 2008
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200702622
Subject(s) - materials science , anatase , microsphere , nanoparticle , refractive index , rutile , emulsion , chemical engineering , suspension (topology) , nanotechnology , phase (matter) , doping , molecule , organic chemistry , optoelectronics , photocatalysis , catalysis , engineering , chemistry , mathematics , homotopy , pure mathematics
Microspheres with tunable functional properties are prepared by controlled aggregation of nanoparticles in emulsion droplets. In particular, complex rutile‐phase morphologies are obtained by heat treatment of anatase titania aggregates. The refractive index of the microspheres can be modulated by using mixtures of silica and titania suspensions. In addition, dye doping is achieved by simply adding dye molecules into the titania suspension.