title: Immobilization of folic acid on Eu3+-doped nanoporous silica spheres.
abstract: Folic acid (FA) was immobilized on Eu(3+)-doped nanoporous silica spheres (Eu:NPSs) through mediation of the 3-aminopropyltriethoxysilane adlayer. The ordered nanopores of Eu:NPS were preserved by the immobilization. The FA-immobilized Eu:NPSs showed the characteristic photoluminescence peak due to interactions between the FA molecules and Eu(3+) ions, and highly dispersed stability in phosphate buffered saline.
authors.affiliation: Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, O-okayama 2-12-1, Meguro-ku, Tokyo 152-8550, Japan. tagaya.m.aa@m.titech.ac.jp
authors.forename: Motohiro
authors.initials: M
authors.lastname: Tagaya
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Ikoma
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Yoshioka
authors.forename: Zhefeng
authors.initials: Z
authors.lastname: Xu
authors.forename: Junzo
authors.initials: J
authors.lastname: Tanaka
mesh_terms: D005063:Europium / Q000737:chemistry*; D005492:Folic Acid / Q000737:chemistry*; D058608:Nanopores; D011437:Propylamines; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D011437:Propylamines; D012821:Silanes; D005063:Europium; D012822:Silicon Dioxide; D005492:Folic Acid; C477625:amino-propyl-triethoxysilane