Preparation of SiO2-Capped Sr2MgSi2O7:Eu,Dy Nanoparticles with Laser Ablation in Liquid
The effect of SiO2 capping on the optical properties of nanoparticles was investigated. The photoluminescence (PL) intensity was successfully improved by SiO2-capping. Sr2MgSi2O7:Eu,Dy nanoparticles were prepared by laser ablation in liquid. The SiO2 capping was performed using the Stöber method wit...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | Journal of Nanotechnology |
| Online Access: | http://dx.doi.org/10.1155/2012/435205 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832556402706481152 |
|---|---|
| author | Mika Ishizaki Takao Katagiri Takao Sasagawa Yoshitaka Kitamoto Osamu Odawara Hiroyuki Wada |
| author_facet | Mika Ishizaki Takao Katagiri Takao Sasagawa Yoshitaka Kitamoto Osamu Odawara Hiroyuki Wada |
| author_sort | Mika Ishizaki |
| collection | DOAJ |
| description | The effect of SiO2 capping on the optical properties of nanoparticles was investigated. The photoluminescence (PL) intensity was successfully improved by SiO2-capping. Sr2MgSi2O7:Eu,Dy nanoparticles were prepared by laser ablation in liquid. The SiO2 capping was performed using the Stöber method with ultrasonication. The TEM images indicated that the Sr2MgSi2O7:Eu,Dy nanocrystal was capped with amorphous SiO2, and the shape of the completely capped nanoparticle was an elliptical nanorod, which aggregated after a long SiO2 capping reaction time. The peak wavelength and the shape of the PL spectra were not changed by the pelletization and the laser ablation in liquid. The PL intensity of SiO2 capped nanoparticles was significantly increased. Nonradiative relaxation via surface defects and energy transfer to water molecules decrease the PL intensity. These phenomena accelerate in the case of nanoparticles. SiO2 capping would prevent these phenomena and improve the optical properties of nanoparticles. The combination of laser ablation in liquid and the chemical reaction is important to expand the applications of this method in various research fields. |
| format | Article |
| id | doaj-art-a79a0e12053142eab9b4bee8729cac36 |
| institution | Kabale University |
| issn | 1687-9503 1687-9511 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Nanotechnology |
| spelling | doaj-art-a79a0e12053142eab9b4bee8729cac362025-02-03T05:45:29ZengWileyJournal of Nanotechnology1687-95031687-95112012-01-01201210.1155/2012/435205435205Preparation of SiO2-Capped Sr2MgSi2O7:Eu,Dy Nanoparticles with Laser Ablation in LiquidMika Ishizaki0Takao Katagiri1Takao Sasagawa2Yoshitaka Kitamoto3Osamu Odawara4Hiroyuki Wada5Departiment of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, JapanMaterials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, JapanMaterials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, JapanDepartiment of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, JapanDepartiment of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, JapanDepartiment of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, JapanThe effect of SiO2 capping on the optical properties of nanoparticles was investigated. The photoluminescence (PL) intensity was successfully improved by SiO2-capping. Sr2MgSi2O7:Eu,Dy nanoparticles were prepared by laser ablation in liquid. The SiO2 capping was performed using the Stöber method with ultrasonication. The TEM images indicated that the Sr2MgSi2O7:Eu,Dy nanocrystal was capped with amorphous SiO2, and the shape of the completely capped nanoparticle was an elliptical nanorod, which aggregated after a long SiO2 capping reaction time. The peak wavelength and the shape of the PL spectra were not changed by the pelletization and the laser ablation in liquid. The PL intensity of SiO2 capped nanoparticles was significantly increased. Nonradiative relaxation via surface defects and energy transfer to water molecules decrease the PL intensity. These phenomena accelerate in the case of nanoparticles. SiO2 capping would prevent these phenomena and improve the optical properties of nanoparticles. The combination of laser ablation in liquid and the chemical reaction is important to expand the applications of this method in various research fields.http://dx.doi.org/10.1155/2012/435205 |
| spellingShingle | Mika Ishizaki Takao Katagiri Takao Sasagawa Yoshitaka Kitamoto Osamu Odawara Hiroyuki Wada Preparation of SiO2-Capped Sr2MgSi2O7:Eu,Dy Nanoparticles with Laser Ablation in Liquid Journal of Nanotechnology |
| title | Preparation of SiO2-Capped Sr2MgSi2O7:Eu,Dy Nanoparticles with Laser Ablation in Liquid |
| title_full | Preparation of SiO2-Capped Sr2MgSi2O7:Eu,Dy Nanoparticles with Laser Ablation in Liquid |
| title_fullStr | Preparation of SiO2-Capped Sr2MgSi2O7:Eu,Dy Nanoparticles with Laser Ablation in Liquid |
| title_full_unstemmed | Preparation of SiO2-Capped Sr2MgSi2O7:Eu,Dy Nanoparticles with Laser Ablation in Liquid |
| title_short | Preparation of SiO2-Capped Sr2MgSi2O7:Eu,Dy Nanoparticles with Laser Ablation in Liquid |
| title_sort | preparation of sio2 capped sr2mgsi2o7 eu dy nanoparticles with laser ablation in liquid |
| url | http://dx.doi.org/10.1155/2012/435205 |
| work_keys_str_mv | AT mikaishizaki preparationofsio2cappedsr2mgsi2o7eudynanoparticleswithlaserablationinliquid AT takaokatagiri preparationofsio2cappedsr2mgsi2o7eudynanoparticleswithlaserablationinliquid AT takaosasagawa preparationofsio2cappedsr2mgsi2o7eudynanoparticleswithlaserablationinliquid AT yoshitakakitamoto preparationofsio2cappedsr2mgsi2o7eudynanoparticleswithlaserablationinliquid AT osamuodawara preparationofsio2cappedsr2mgsi2o7eudynanoparticleswithlaserablationinliquid AT hiroyukiwada preparationofsio2cappedsr2mgsi2o7eudynanoparticleswithlaserablationinliquid |