Silica-coating of quantum nanorods by a sol–gel process and their photo-bleaching properties
| Autor: | Masaya Kambayashi, Stephan Dertinger, Yuki Hirayama, Masaki Hasegawa, Mai Yokokawa, Yoshio Kobayashi, Hiroshi Okura, Ting ting Li, Kouichi Nakashima |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nanoparticle macromolecular substances 02 engineering and technology 010402 general chemistry 01 natural sciences Biomaterials Matrix (chemical analysis) chemistry.chemical_compound Colloid Materials Chemistry Sol-gel technology industry and agriculture General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photobleaching Fluorescence 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Chemical engineering Sodium hydroxide Ceramics and Composites Nanorod 0210 nano-technology |
| Zdroj: | Journal of Sol-Gel Science and Technology. 86:773-781 |
| ISSN: | 1573-4846 0928-0707 |
| DOI: | 10.1007/s10971-018-4674-2 |
| Popis: | This paper describes silica-coating of rod-structured nanoparticles composed of cadmium compounds, or quantum rods (QR), by means of a sol–gel method. QRs surface-modified with polyethyleneimine (PEI) (QR/PEI) had an average lateral size of 6.7 ± 0.9 nm and an average longitudinal size of 24.4 ± 2.5 nm. Silica-coated QR nanoparticles (QR/SiO2) were fabricated with a sol–gel process using water, sodium hydroxide, and tetraethylorthosilicate in ethanol in the presence of the QR/PEI nanoparticles. The QR/SiO2 nanoparticles were core-shell particles composed of the QRs as the core, the PEI as the matrix, and the silica as the shells. The colloid solution of QR/SiO2 nanoparticles showed more stable fluorescence to aging in a dark box in atmosphere at room temperature than that of QR/PEI nanoparticles. |
| Databáze: | OpenAIRE |
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