title: Photophysical properties of luminescent silicon nanoparticles surface-modified with organic molecules via hydrosilylation.
abstract: Luminescent silicon nanoparticles have attracted considerable attention for their potential uses in various applications. Many approaches have been reported to protect the surface of silicon nanoparticles and prevent their easy oxidation. Various air-stable luminescent silicon nanoparticles have been successfully prepared. However, the effect of interactions of the π-electron system with the silicon surface on the excited state properties of silicon nanoparticles is unclear. In this study, we have successfully prepared silicon nanoparticles protected with three organic compounds (styrene, 1-decene, and 1-vinyl naphthalene) and have examined their photophysical properties. The ligand π-electron systems on the silicon surface promoted the light harvesting ability for the luminescence through a charge transfer transition between the protective molecules and silicon nanoparticles and also enhanced the radiative rate of the silicon nanoparticles.
authors.affiliation: Faculty of Engineering, Hokkaido University, N13 W8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan. y-kitagawa@eng.hokudai.ac.jp hasegaway@eng.hokudai.ac.jp.
authors.forename: Mari
authors.initials: M
authors.lastname: Miyano
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Kitagawa
authors.forename: Satoshi
authors.initials: S
authors.lastname: Wada
authors.forename: Akira
authors.initials: A
authors.lastname: Kawashima
authors.forename: Ayako
authors.initials: A
authors.lastname: Nakajima
authors.forename: Takayuki
authors.initials: T
authors.lastname: Nakanishi
authors.forename: Junya
authors.initials: J
authors.lastname: Ishioka
authors.forename: Tamaki
authors.initials: T
authors.lastname: Shibayama
authors.forename: Seiichi
authors.initials: S
authors.lastname: Watanabe
authors.forename: Yasuchika
authors.initials: Y
authors.lastname: Hasegawa
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D008024:Ligands; D049449:Luminescence; D053758:Nanoparticles / Q000737:chemistry*; D009281:Naphthalenes / Q000737:chemistry*; D010316:Particle Size; D055668:Photochemical Processes; D011789:Quantum Theory; D012821:Silanes / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*; D020058:Styrene / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000475:Alkenes; D008024:Ligands; D009281:Naphthalenes; D012821:Silanes; D020058:Styrene; D012825:Silicon