Premium
Probing into Bifunctional Luminomagnetic Upconverting Nanorods for External Magnetic Tracking Applications
Author(s) -
Singh Satbir,
Ghorai Biswajit,
Kumar Yadav Pramod,
Kumar Ghorai Uttam,
Upadhyay Chandan,
Gupta Bipin Kumar
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202003159
Subject(s) - nanorod , materials science , photon upconversion , laser , doping , optoelectronics , nanotechnology , magnetism , optics , condensed matter physics , physics
Abstract A strategy to synthesize a bi‐functional luminomagnetic Er 3+ /Yb 3+ ‐doped NaGdF 4 nanorods, using a facile base‐catalyzed hydrothermal method, is demonstrated. This luminomagnetic nanorods material is investigated for its structural/microstructural, optical, and magnetic properties to validate applications in the bio‐medical field. The as‐synthesized nanorods exhibit highly intense green emission peaking at 539 nm upon excitation with 980 nm wavelength using a diode laser. Further, the effect of 980 nm laser power on the emission spectrum of these Er 3+ /Yb 3+ ‐doped NaGdF 4 nanorods is investigated and a mechanism for the upconversion process is proposed. The CIE (French: International Commission on Illumination) coordinates at all the input laser powers lie in the close vicinity of x=0.28 and y=0.68 and thus suggest the color purity of the Er 3+ /Yb 3+ ‐doped NaGdF 4 nanorods. Moreover, these nanorods also exhibit strong paramagnetic behavior as confirmed by M−H and M−T measurements. We have also demonstrated the application of these nanorods for external magnetic field tracking applications. The cellular cytotoxicity analysis of the nanorods against the MDA‐MB‐231 and MCF‐10 A cell lines suggests their applicability in biomedical applications. Thus, the co‐existence of luminescence and magnetism in a single entity suggests its suitability as a bi‐functional nanoprobe in biological applications.