Synthesis and Characterization of Undoped and Co-Doped SnO2 Nanoparticles
Undoped and Co-doped (1 and 3 at. %) SnO2 nanoparticles were synthesized by a simple co-precipitation method. X-Ray diffraction data revealed that both undoped and doped samples crystallize in the tetragonal rutile phase with CoO phase in doped samples. The lattice parameters of doped samples calcul...
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Sumy State University
2011-01-01
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| Series: | Журнал нано- та електронної фізики |
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| Online Access: | http://jnep.sumdu.edu.ua/download/numbers/2011/1,%20Part%201/articles/jnep_2011_V3_N1(Part1)_092-100.pdf |
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| author | R.N. Mariammal N. Rajamanickam K. Ramachandran |
| author_facet | R.N. Mariammal N. Rajamanickam K. Ramachandran |
| author_sort | R.N. Mariammal |
| collection | DOAJ |
| description | Undoped and Co-doped (1 and 3 at. %) SnO2 nanoparticles were synthesized by a simple co-precipitation method. X-Ray diffraction data revealed that both undoped and doped samples crystallize in the tetragonal rutile phase with CoO phase in doped samples. The lattice parameters of doped samples calculated from XRD data do not vary much when compared to undoped one indicating that Co has not substituted the host lattice. The surface morphology investigated by SEM indicates the cluster formation in Co-doped (1 and 3 at. %) nanoparticles and the chemical composition of the samples were analyzed by energy dispersive spectroscopy (EDS). UV-Vis spectrum of undoped system showed absorption at 408 nm (3.04 eV), which is red shifted by 0.56 eV compared to bulk SnO2 (3.6 eV) due to the cluster nature of the sample. The UV-Vis spectra of doped samples showed absorption in the visible region due to the formation of CoO phase, which is also evident from the XRD spectra. PL spectra showed characteristic UV emission at 409 nm and blue emission at 480 nm. The characteristic vibrational modes of SnO2 were studied from FTIR analysis. EPR measurement of Co-doped (3 at .%) SnO2 nanoparticles showed the paramagnetic behavior which may be attributed to the occupation of Co2+ ions in the interstitial site rather than the substitutional site. The absence of ferromagnetism is due to the high doping concentration of Co (> 1 at. %) and also due to the high annealing temperature which destroys the hyperfine splitting. |
| format | Article |
| id | doaj-art-df16a4e1c27d4becbb9dc319c8adf0bd |
| institution | DOAJ |
| issn | 2077-6772 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Sumy State University |
| record_format | Article |
| series | Журнал нано- та електронної фізики |
| spelling | doaj-art-df16a4e1c27d4becbb9dc319c8adf0bd2025-08-20T03:21:05ZengSumy State UniversityЖурнал нано- та електронної фізики2077-67722011-01-013192100Synthesis and Characterization of Undoped and Co-Doped SnO2 NanoparticlesR.N. MariammalN. RajamanickamK. RamachandranUndoped and Co-doped (1 and 3 at. %) SnO2 nanoparticles were synthesized by a simple co-precipitation method. X-Ray diffraction data revealed that both undoped and doped samples crystallize in the tetragonal rutile phase with CoO phase in doped samples. The lattice parameters of doped samples calculated from XRD data do not vary much when compared to undoped one indicating that Co has not substituted the host lattice. The surface morphology investigated by SEM indicates the cluster formation in Co-doped (1 and 3 at. %) nanoparticles and the chemical composition of the samples were analyzed by energy dispersive spectroscopy (EDS). UV-Vis spectrum of undoped system showed absorption at 408 nm (3.04 eV), which is red shifted by 0.56 eV compared to bulk SnO2 (3.6 eV) due to the cluster nature of the sample. The UV-Vis spectra of doped samples showed absorption in the visible region due to the formation of CoO phase, which is also evident from the XRD spectra. PL spectra showed characteristic UV emission at 409 nm and blue emission at 480 nm. The characteristic vibrational modes of SnO2 were studied from FTIR analysis. EPR measurement of Co-doped (3 at .%) SnO2 nanoparticles showed the paramagnetic behavior which may be attributed to the occupation of Co2+ ions in the interstitial site rather than the substitutional site. The absence of ferromagnetism is due to the high doping concentration of Co (> 1 at. %) and also due to the high annealing temperature which destroys the hyperfine splitting.http://jnep.sumdu.edu.ua/download/numbers/2011/1,%20Part%201/articles/jnep_2011_V3_N1(Part1)_092-100.pdfNanoparticlesSemiconductorsScanning Electron MicroscopyPhotoluminescenceMagnetic Properties |
| spellingShingle | R.N. Mariammal N. Rajamanickam K. Ramachandran Synthesis and Characterization of Undoped and Co-Doped SnO2 Nanoparticles Журнал нано- та електронної фізики Nanoparticles Semiconductors Scanning Electron Microscopy Photoluminescence Magnetic Properties |
| title | Synthesis and Characterization of Undoped and Co-Doped SnO2 Nanoparticles |
| title_full | Synthesis and Characterization of Undoped and Co-Doped SnO2 Nanoparticles |
| title_fullStr | Synthesis and Characterization of Undoped and Co-Doped SnO2 Nanoparticles |
| title_full_unstemmed | Synthesis and Characterization of Undoped and Co-Doped SnO2 Nanoparticles |
| title_short | Synthesis and Characterization of Undoped and Co-Doped SnO2 Nanoparticles |
| title_sort | synthesis and characterization of undoped and co doped sno2 nanoparticles |
| topic | Nanoparticles Semiconductors Scanning Electron Microscopy Photoluminescence Magnetic Properties |
| url | http://jnep.sumdu.edu.ua/download/numbers/2011/1,%20Part%201/articles/jnep_2011_V3_N1(Part1)_092-100.pdf |
| work_keys_str_mv | AT rnmariammal synthesisandcharacterizationofundopedandcodopedsno2nanoparticles AT nrajamanickam synthesisandcharacterizationofundopedandcodopedsno2nanoparticles AT kramachandran synthesisandcharacterizationofundopedandcodopedsno2nanoparticles |