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Nannuri SH, Singh S, Misra SK, Chidangil S, George SD. Microwave-assisted synthesis and upconversion luminescence of NaYF 4:Yb, Gd, Er and NaYF 4:Yb, Gd, Tm nanorods. Methods Appl Fluoresc 2022; 10. [PMID: 35213848 DOI: 10.1088/2050-6120/ac58e6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 02/25/2022] [Indexed: 11/12/2022]
Abstract
Anisotropic rare-earth ion (RE3+) doped fluoride upconversion particles are emerging as a potential candidate in diverse areas, ranging from biomedical imaging to photonics. Here, we develop a facile strategy to synthesize NaYF4:Yb, Er, Gd and NaYF4:Yb, Tm, Gd upconversion nanorods via microwave synthesis route by controlling the synthesis time and compared the optical properties of similar nanorods prepared via solvothermal technique. With the increase in synthesis time, the phase of the particle was found to change from mixed-phase to purely hexagonal and the morphology of the particles change the mixed phase of spherical and rod-shaped particles to completely nanorods for a synthesis time of 60 minutes. Further, the intrinsically hydrophobic particles changed to hydrophilic by removal of oleic capping via acid treatment and the amine-functionalized silica coating. The upconversion luminescence, as well as laser power-dependent emission properties of the surface-modified particles, elucidate that the surface modification route influence the upconversion luminescence as well as solvent-dependent emission properties. Moreover, the laser power-dependent studies elucidate that the upconversion process in a multi-photon process.
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Affiliation(s)
- Shivanand H Nannuri
- Department of Atomic and MOlecular Physics, Manipal Academy of Higher Education, AB-5, LG-1, MIT Campus, MAHE. Manipal, Manipal, Karnataka, 576104, INDIA
| | - Simranjit Singh
- Materials Engineering, Indian Institute of Technology, IIT Gandhinagar, Indian Institute of Technology Gandhinagar, Gandhinagar, Gujarat, 382355, INDIA
| | - Superb Kumar Misra
- Materials Science and Engineering, IIT Gandhinagar, Materials Science and Engineering Indian Institute of Technology Gandhinagar, Ahmedabad, 382424, INDIA
| | - Santhosh Chidangil
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, AB-5, LG-1, MIT campus, Manipal, Karnataka, 576104, INDIA
| | - Sajan D George
- Center for Atomic and Molecular Physics, Manipal Academy of Higher Education, Academic Block -5, LG-01, MIT Campus, Manipal University, Manipal, Karnataka, 576104, INDIA
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