ItemArticle

Synthesis and Characterization of Eu2+/Nd3+ Activated CaSi2O5 Phosphor for Bioimaging Applications

Title
Synthesis and Characterization of Eu2+/Nd3+ Activated CaSi2O5 Phosphor for Bioimaging Applications
Creator
Chakraborty, Ananya; Aman, Shireen; Mishra, Shubhra; Dubey, Neha; Saji, Janita; Kshatri, D.S.; Dubey, Vikas
Description
The advancement of non-invasive diagnostic tools has propelled the development of luminescent nanomaterials with enhanced imaging capabilities. In this study, Eu2+/Nd3+ codoped CaSi2O5 phosphors were synthesized via a conventional solid-state reaction route under a reducing environment to explore their potential for bioimaging applications. Calcium silicate, known for its intrinsic biocompatibility, served as the host matrix, whereas Eu2+ acted as the primary luminescent centre and Nd3+ was used as the near-infrared (NIR) sensitizer to support deep-tissue excitation. Structural analysis via X-ray diffraction (XRD) verified the formation of a triclinic crystal structure and the average crystallite size was validated through both Scherrer equation and WilliamsonHall analyses. Field emission gun scanning electron microscopy (FEG-SEM) images revealed flower-like microstructures with embedded fine white particles. Energy-dispersive X-ray spectroscopy (EDX) detected the existence of expected chemical components of the phosphor, whereas Fourier-transform infrared (FTIR) spectra provided evidence of successful dopant incorporation through characteristic vibrations corresponding to CaO, SiOSi, EuO and NdO bonds. Photoluminescence studies showed an excitation spectrum with distinct and intense absorption bands within the range of 7001000 nm, attributed to the 4f4f transitions of Nd3+ ions, and upon excitation at approximately 800 nm, the phosphor exhibited dual emission bands around 410 and 440 nm with optimal intensity corresponding to the characteristic 4f65d1 ? 4f7 transitions of Eu2+. The afterglow decay analysis showed persistent luminescence exceeding 15 min, and CIE chromaticity analysis confirmed that the emission lies within the blue spectral range (x = 0.155, y = 0.059), indicating high potential for background-free bioimaging with high chromatic accuracy. These findings suggest that Eu2+/Nd3+ doped CaSi2O5 can be a promising luminescent material for advanced biomedical imaging applications. 2025 John Wiley & Sons Ltd.
Source
Luminescence;Volume;40;Issue;9;Article No.;e70316;
Date
01-01-2025
Publisher
John Wiley and Sons Ltd
Subject
bioimaging; persistent luminescence; phosphors; photoluminescence
Coverage
Chakraborty A., Department of Physics, North-Eastern Hill University, Meghalaya, Shillong, India; Aman S., Department of Physics, North-Eastern Hill University, Meghalaya, Shillong, India; Mishra S., Department of Physics, Government Naveen College Gudhiyari, Raipur, India; Dubey N., Department of Physics, Govt. VYT PG Auto. College, Chhattisgarh, Durg, India; Saji J., Department of Sciences and Humanities School of Engineering and Technology, CHRIST University, Bangalore, India; Kshatri D.S., Department of Physics, Shri Shankaracharya Institute of Professional Management and Technology, Chhattisgarh, Raipur, India; Dubey V., Department of Physics, North-Eastern Hill University, Meghalaya, Shillong, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 15227235; CODEN: LUMIF
Format
online
Language
English
Type
Article

Citation

Chakraborty, Ananya; Aman, Shireen; Mishra, Shubhra; Dubey, Neha; Saji, Janita; Kshatri, D.S.; Dubey, Vikas, “Synthesis and Characterization of Eu2+/Nd3+ Activated CaSi2O5 Phosphor for Bioimaging Applications,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 19, 2026, https://archives.christuniversity.in/items/show/21750.

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