PVP Assisted Synthesis of Hydroxyapatite Nanorods with Tunable Aspect Ratio and Bioactivity

Nathanael, A. Joseph; Seo, Young Ho; Oh, Tae Hwan

doi:10.1155/2015/621785

Cited by 29 publications

(16 citation statements)

References 19 publications

(32 reference statements)

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“…This is the possible mechanism for NHAp nanorod. The mechanism for the formation of HAp nanorod while adding PVP is clearly explained in the literature [18,[57][58][59]. The present study also strongly believed that the above mentioned same mechanism could be involved in the present NHAp.…”

Section: Surface Morphology -Semsupporting

confidence: 81%

“…For the formation of nanorod, large driving force could be acted to maximize the contact area and minimize the surface energy. PVP restricts growth along the side faces and activates growth along the end direction (c-axis), resulting in NHAp nanorods [57]. Many literature show that HAp prepared by precipitation method could be rod-like nanostructures preferably.…”

Section: Surface Morphology -Semmentioning

confidence: 99%

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Hydroxyapatite for bone related applications derived from sea shell waste by simpleprecipitation method

Kumar

Dhanaraj

Vimalathithan³

et al. 2020

Journal of Asian Ceramic Societies

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The nano-hydroxyapatite (NHAp), NHAp/PEG and NHAp/PVP have been derived from Clam shell by precipitation method. The presence of characteristic FTIR peaks and XRD planes indicates the formation of NHAp. Surface morphology of NHAp, NHAp/PEG and NHAp/PVP appeared to be flake, majorly hexagonal and rod clusters like structure, respectively. Sizes of the NHAp are in nanometer scale and size of NHAp/PVP is the lowest. The poor crystalline nature and high carbonate content presence in NHAp/PVP are assessed through crystallinity index, C/P ratio and CHNS analysis. EDX analysis shows the presence of HAp composition in NHAp. The calculated structural parameters expose that the NHAp/PVP shows favorable mechanical property. Good antibacterial activity is observed in NHAp/PVP against two bacteria strains. Hemolysis study also indicates that NHAp/PVP is non-hemolytic. Formation of complete apatite is found when NHAp/PVP immersed in SBF for 14 days. Thus, the NHAp/PVP derived from Clam shell may be useful for bone-related applications. ARTICLE HISTORY

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Section: Surface Morphology -Semsupporting

confidence: 81%

Section: Surface Morphology -Semmentioning

confidence: 99%

Hydroxyapatite for bone related applications derived from sea shell waste by simpleprecipitation method

Kumar

Dhanaraj

Vimalathithan³

et al. 2020

Journal of Asian Ceramic Societies

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show abstract

“…The calculated degree of texture index (David Nunez et al, 2014) for the synthesized hydroxyapatite is 0.51 indicating a preferred growth orientation along the c-axis (Nathanael et al, 2015). These results are consistent with electronic microscope images (Figure 1 b and c), which show fibrous needle-like particles with mean diameters of 20 nm and length of approximately 150 nm.…”

Section: Hydroxyapatite Characterizationsupporting

confidence: 79%

Laser-treated electrospun fibers loaded with nano-hydroxyapatite for bone tissue engineering

Aragón

Navascués

Mendoza

et al. 2017

International Journal of Pharmaceutics

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Core-shell polycaprolactone/polycaprolactone (PCL/PCL) and polycaprolactone/polyvinyl acetate (PCL/PVAc) electrospun fibers loaded with synthesized nanohydroxyapatite (HAn) were lased treated to create microporosity. The prepared materials were characterized by XRD, FTIR, TEM and SEM. Uniform and randomly oriented beadless fibrous structures were obtained in all cases. Fibers diameters were in the 150-300nm range. Needle-like HAn nanoparticles with mean diameters of 20nm and length of approximately 150nm were mostly encase inside the fibers. Laser treated materials present micropores with diameters in the range 70-120μm for PCL-HAn/PCL fibers and in the 50-90μm range for PCL-HAn/PVAC material. Only samples containing HAn presented bioactivity after incubation during 30days in simulated body fluid. All scaffolds presented high viability, very low mortality, and human osteoblast proliferation. Biocompatibility was increased by laser treatment due to the surface and porosity modification.

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“…They described that the nanorods were stable in the solution and that they were well dispersed, avoiding particle aggregation, and reported a higher bioactivity in the nanorod-doped adhesive. In addition to these, other synthesis methods, as by sol–gel [ 173 ], spray drying [ 174 ], microware-assisted [ 175 ], sonochemical homogeneous precipitation [ 176 ], by a hard-template [ 177 ], polyvinylpyrrolidone (PVP)-assisted hydrothermal method [ 178 ] have been described.…”

Section: Nanorods Nanowires and Nanotubesmentioning

confidence: 99%

Nanomaterials in Dentistry: State of the Art and Future Challenges

2020

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Nanomaterials are commonly considered as those materials in which the shape and molecular composition at a nanometer scale can be controlled. Subsequently, they present extraordinary properties that are being useful for the development of new and improved applications in many fields, including medicine. In dentistry, several research efforts are being conducted, especially during the last decade, for the improvement of the properties of materials used in dentistry. The objective of the present article is to offer the audience a complete and comprehensive review of the main applications that have been developed in dentistry, by the use of these materials, during the last two decades. It was shown how these materials are improving the treatments in mainly all the important areas of dentistry, such as endodontics, periodontics, implants, tissue engineering and restorative dentistry. The scope of the present review is, subsequently, to revise the main applications regarding nano-shaped materials in dentistry, including nanorods, nanofibers, nanotubes, nanospheres/nanoparticles, and zeolites and other orders porous materials. The results of the bibliographic analysis show that the most explored nanomaterials in dentistry are graphene and carbon nanotubes, and their derivatives. A detailed analysis and a comparative study of their applications show that, although they are quite similar, graphene-based materials seem to be more promising for most of the applications of interest in dentistry. The bibliographic study also demonstrated the potential of zeolite-based materials, although the low number of studies on their applications shows that they have not been totally explored, as well as other porous nanomaterials that have found important applications in medicine, such as metal organic frameworks, have not been explored. Subsequently, it is expected that the research effort will concentrate on graphene and zeolite-based materials in the coming years. Thus, the present review paper presents a detailed bibliographic study, with more than 200 references, in order to briefly describe the main achievements that have been described in dentistry using nanomaterials, compare and analyze them in a critical way, with the aim of predicting the future challenges.

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PVP Assisted Synthesis of Hydroxyapatite Nanorods with Tunable Aspect Ratio and Bioactivity

Cited by 29 publications

References 19 publications

Hydroxyapatite for bone related applications derived from sea shell waste by simpleprecipitation method

Hydroxyapatite for bone related applications derived from sea shell waste by simpleprecipitation method

Laser-treated electrospun fibers loaded with nano-hydroxyapatite for bone tissue engineering

Nanomaterials in Dentistry: State of the Art and Future Challenges

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