Alshemary A., Sarsık B., Almozani M., Alhachami F., Çardaklı İ. S., Motameni A.
SCIENCE OF SINTERING, cilt.58, sa.00, ss.99-109, 2025 (Scopus)
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Yayın Türü:
Makale / Tam Makale
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Cilt numarası:
58
Sayı:
00
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Basım Tarihi:
2025
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Doi Numarası:
10.2298/sos250120007a
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Dergi Adı:
SCIENCE OF SINTERING
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Derginin Tarandığı İndeksler:
Scopus, Central & Eastern European Academic Source (CEEAS), Compendex, Directory of Open Access Journals
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Sayfa Sayıları:
ss.99-109
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Atatürk Üniversitesi Adresli:
Evet
Özet
This study investigates the synthesis, characterization, and optical
properties of cobalt-doped ?-tricalcium phosphate (Co-?TCP) nanoparticles
prepared via microwave refluxing and sintered at 1000?C for 2 hours.
Incorporating Co2+ ions into the ?TCP structure significantly influences its
microstructural and optical properties. X-ray diffraction analysis (XRD)
reveals a contraction of the crystal lattice upon Co2+ doping, attributed to
the substitution of larger Ca2+ ions (ionic radius 0.099 nm) with smaller
Co2+ ions (ionic radius 0.074 nm). This reduces lattice parameters, cell
volume, crystallinity, and smaller crystallite sizes. The degree of
crystallinity decreases from 89.56% for pure ?-TCP to 57.81% for 3Co-?-TCP.
Scanning electron microscopy (SEM) shows that Co2+ doping produces more
homogeneous powder with enhanced interconnectivity while maintaining a
spheroidal agglomerated structure. The average particle size decreases from
approximately 300 nm for pure ?TCP to 246 nm for 3Co-?TCP. Fourier transform
infrared spectroscopy confirms the successful integration of Co2+ ions into
the ?TCP lattice, evidenced by peak broadening and intensity reduction.
Notably, incorporating Co2+ ions induces a striking colour change from white
to pink, with intensity proportional to cobalt concentration. UV-Vis
spectroscopy reveals characteristic absorption peaks at 530 and 678 nm,
associated with Co2+ electronic transitions. The unique optical properties
of Co2+ ions doped in ?TCP open up new possibilities for its use in
bioimaging and drug delivery systems