التفاصيل البيبلوغرافية
| العنوان: |
Optical and luminescence properties of pure, iron-doped, and glucose capped ZnO nanoparticles. |
| المؤلفون: |
Gudla, Umesh Reddy, Suryanarayana, B., Raghavendra, Vemuri, Emmanuel, K.A., Murali, N., Taddesse, Paulos, Parajuli, D., Chandra Babu Naidu, K., Ramakrishna, Y., Chandramouli, K. |
| المصدر: |
Results in Physics; Dec2020, Vol. 19, pN.PAG-N.PAG, 1p |
| مستخلص: |
• ZnO NPs can be prepared by simple and easy chemical precipitation method. • Blue-shifted absorption band takes place due to quantum confinement effect or small and spherical size effect. • Fe doped ZnO behaves as a quencher. • ZnO is biocompatible semiconductor. • Change in intensity changes the peak positions of capped sample more than pure and doped ZnO samples. Pure, iron-doped, and glucose capped ZnO nanoparticles (NPs) have been synthesized by a chemical precipitation method. The structural, optical, and photoluminescence properties of all the prepared samples are examined systematically. X-ray diffraction patterns of all the samples exhibited a single hexagonal wurtzite structure with an average crystallite size ranging from 1.01 to 1.78 nm. Transmission electron microscope images showed the spherical shaped NPs in the range of between 17 and 19 nm. Fourier transform of infrared spectroscopy (FTIR) studies confirmed the presence of octahedral sites around 470–489 cm−1 and tetrahedral sites at 616 cm−1 in pristine and doped samples. The calculated optical bandgap energy for pure, Fe doped and glucose capped ZnO NPs are found to be 3.82, 3.80, and 3.63 eV, respectively, and the variations in the bandgap is ascribed to the Fermi level, which is in the conduction band resulting in the absorption edge shifting towards the higher/ lower energy. It is observed that Fe doped and glucose capped ZnO NPs showed a strong photoluminescence signal than the pure ZnO NPs. The green emission is quenched. The blue emission is enhanced due to the deactivation of oxygen vacancies on the surfaces due to the smaller particle sizes as a result of the quantum confinement effect. [ABSTRACT FROM AUTHOR] |
|
Copyright of Results in Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Supplemental Index |
Full Text Finder