title: Photoluminescence of silicon quantum dots in nanospheres.
abstract: Si quantum dots (SiQDs) based nanospheres (SiNSs) were prepared via a novel synthetic strategy. These SiNSs were demonstrated to possess unique dot spacing dependent photoluminescence (PL) up-conversion and surface dependent (N modified surface) down-converted PL. It was demonstrated that a small distance between SiQDs (<5 nm) is the necessary condition for the PL up-conversion of SiNSs, while the surface state of SiQDs will affect the maximum emission wavelength and the PL intensity. The as-prepared SiNSs feature excellent aqueous dispersibility, and their optical properties were found to be stable enough in a specified temperature and pH range.
authors.affiliation: Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, China.
authors.forename: Yuxiao
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiao
authors.initials: X
authors.lastname: Han
authors.forename: Jianming
authors.initials: J
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Hui
authors.initials: H
authors.lastname: Huang
authors.forename: Hai
authors.initials: H
authors.lastname: Ming
authors.forename: Shuit-Tong
authors.initials: ST
authors.lastname: Lee
authors.forename: Zhenhui
authors.initials: Z
authors.lastname: Kang
mesh_terms: D000179:Acrylates / Q000737:chemistry; D005029:Ethylenediamines / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry; D008163:Luminescent Measurements; D054118:Nanospheres / Q000737:chemistry*; D045663:Quantum Dots; D012825:Silicon / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000179:Acrylates; D005029:Ethylenediamines; C031234:ethylenediamine; D006859:Hydrogen; C036658:acrylic acid; D012825:Silicon