Abstract
AbstractA strategy to synthesize a bi‐functional luminomagnetic Er3+/Yb3+‐doped NaGdF4 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 Er3+/Yb3+‐doped NaGdF4 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 Er3+/Yb3+‐doped NaGdF4 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.
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