Morphological and optical properties of porous hydroxyapatite/cornstarch (HAp/Cs) composites

You, Beh Chong; Cheng, E. M.; Nasir, N. F. Mohd; Tarmizi, Emma Ziezie Mohd; Eng, S.K.; Majid, M.S. Abdul; Ridzuan, M.J.M.; Khor, Shing Fhan; Saad, F.S. Ahmad

doi:10.1016/j.jmrt.2020.10.012

Cited by 13 publications

(6 citation statements)

References 36 publications

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“…For example, nanosized HAps have been shown to have a slightly larger band gap than larger particles due to quantum connement effects. 53,54 Additionally, the shape of HAp particles can also affect their band gap due to the variation of their porosity, pore sizes, and surface roughness. 54 However, the band gap changes in our work are distinct and could instead be affected by various defects and compositions, as defects and disorders in the crystal lattice can introduce energy levels within the band gap.…”

Section: Uv-vis and Color Powdersmentioning

confidence: 99%

“…53,54 Additionally, the shape of HAp particles can also affect their band gap due to the variation of their porosity, pore sizes, and surface roughness. 54 However, the band gap changes in our work are distinct and could instead be affected by various defects and compositions, as defects and disorders in the crystal lattice can introduce energy levels within the band gap. Substitution of various cations and anions into HAps can alter their electronic properties by introducing energy levels within the band gap.…”

Section: Uv-vis and Color Powdersmentioning

confidence: 99%

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Impacts of pre-treatment methods on the morphology, crystal structure, and defects formation of hydroxyapatite extracted from Nile tilapia scales

Eknapakul,

Kuimalee,

Sailuam

et al. 2024

RSC Adv.

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Section: Uv-vis and Color Powdersmentioning

confidence: 99%

Section: Uv-vis and Color Powdersmentioning

confidence: 99%

Impacts of pre-treatment methods on the morphology, crystal structure, and defects formation of hydroxyapatite extracted from Nile tilapia scales

Eknapakul,

Kuimalee,

Sailuam

et al. 2024

RSC Adv.

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show abstract

“…In addition, scaffolds in the ACP phase have high biocompatibility potential for repair in bone tissue [7]. However, the weakness of this scaffold is that the macro connective tissue is not fully formed, and its mechanical properties are low [25,26], so further development is needed in terms of polymer solution concentration, drying methods and anti-bacterial testing to support the quality of the scaffold in bone graft applications. 3− groups as constituents of apatite.…”

Section: Sem-edx and Porosity Analysismentioning

confidence: 99%

Characterization of PVA/Chitosan and Tuna Fish Bones CHA Scaffold for Bone Tissue Engineering

Pratiwi,

Sari,

Yusuf

2024

AMR

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Bone tissue engineering has been used in the biomedical field to treat bone defects by implanting scaffolds into bone tissue. However, the currently developed scaffold still needs to be developed to obtain scaffold building materials with good compatible properties and can regenerate damaged bone cells. This study combines PVA/Chitosan polymer with CHA of tuna bone using the porogen leaching method at a calcination temperature of 100°C for 12 hours. The purpose of this study was to determine the physicochemical properties by characterizing XRD, SEM-EDX, FTIR, and the porosity of the scaffold. The results obtained from the results of the PVA/Chitosan/CHA XRD patterns are the formation of the PVA/Chitosan phase at 2θ(°)=19.68, the IR spectrum of the 43−group band and 2 stretching, the ratio mol Ca/P is 1.98, the pore diameter is 1.561 ± 0.07 μm and the porosity is 55.04%. These results indicate that the PVA/Chitosan/CHA scaffold is an amorphous calcium phosphate (ACP) that has the potential for bone tissue engineering.

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“…Doping HAp with transition metal ions such as chromium can enhance its electrical properties 7 . Furthermore, the optical properties of HAp can vary depending on several factors, including synthesis conditions 8 . Therefore, HAp is a versatile material with a wide range of properties that can be tailored to specific medical applications.…”

Section: Introductionmentioning

confidence: 99%

Correlation between positron annihilation lifetime and photoluminescence measurements for calcined Hydroxyapatite

Atta,

Mahmoud,

Salim

et al. 2024

Sci Rep

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Hydroxyapatite (HAp) Ca10(PO4)6(OH)2 is a compound that has stable chemical properties, composition, and an affinity for human bone. As a result, it can be used in odontology, cancer treatment, and orthopedic grafts to repair damaged bone. To produce calcined HAp at 600 °C with different pH values, a wet chemical precipitation method was employed. All synthesized HAp samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), photoluminescence (PL), Zeta potential, and positron annihilation lifetime spectroscopy (PALS). The XRD results revealed that all calcined HAp samples were formed in a hexagonal structure with a preferred (002) orientation at different pH values. The crystal size of the samples was determined using the Scherrer equation, which ranged from 16 to 25 nm. The SEM and TEM results showed that the morphology of the samples varied from nanorods to nanospheres and rice-like structures depending on the pH value of the sample. The PL measurements indicated that the blue and green emission peaks of HAp were due to defects (bulk, surface, and interface) in the samples, which created additional energy levels within the band gap. According to Zeta potential measurements, the charge carrier changed from a positive to negative value, ranging from 3.94 mV to − 2.95 mV. PALS was used to understand the relationship between the defects and the photoluminescence (PL) properties of HAp. Our results suggest that HAp nanoparticles have excellent potential for developing non-toxic biomedical and optical devices for phototherapy.

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Morphological and optical properties of porous hydroxyapatite/cornstarch (HAp/Cs) composites

Cited by 13 publications

References 36 publications

Impacts of pre-treatment methods on the morphology, crystal structure, and defects formation of hydroxyapatite extracted from Nile tilapia scales

Impacts of pre-treatment methods on the morphology, crystal structure, and defects formation of hydroxyapatite extracted from Nile tilapia scales

Characterization of PVA/Chitosan and Tuna Fish Bones CHA Scaffold for Bone Tissue Engineering

Correlation between positron annihilation lifetime and photoluminescence measurements for calcined Hydroxyapatite

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