In-situ synthesis of reactive hydroxyapatite nano-crystals for a novel approach of surface grafting polymerization

Lee, Sang Cheon; Choi, Hyung Woo; Lee, Hong Jae; Kim, Kyung Ja; Chang, Jinhwa; Kim, So Yeon; Choi, Jinsub; Oh, Kwang‐Seok; Jeong, Young-Keun

doi:10.1039/b611401f

Cited by 83 publications

(61 citation statements)

References 28 publications

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“…Some reports indicated that the sol-gel technique was used to prepare Si core part, but the average diameter of Si core part was not controllable, up to 250 nm [29,30,41]. As a result, the final silica-titania particle size became large.…”

Section: Optical Properties Of Si/ti and Si/tia Colloidsmentioning

confidence: 95%

UV-Absorption and Silica/Titania Colloids Using a Core–Shell Approach

Zhou

Heinz

Soucek

et al. 2010

Silicon

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Metal-oxo-colloids have been prepared using tetraethoxysilane (TEOS) oligomers with titanium tetra-ipropoxide (TIP) or titanium (di-i-propoxide) bis(acetylacetonate) (TIA) precursors. Transmission electron microscopy (TEM), FTIR, UV-Vis, and photoluminescence spectroscopy were used to investigate the composition, the size, and optical properties of the Si/Ti core-shell colloids. The presence of hetero-bonded silicate structure (Si-O-Ti) was indicated by FTIR spectroscopy. The size of Si/TIP system ranged from 55 to 120 nm and Si/TIA system ranged from 220 to 250 nm. The TEM data indicated that the size of colloids can be controlled by the TIP or TIA content. The Si/ Ti system exhibited strong absorption in the UV-range, yet had excellent optical transmittance in the visible range. The Si/Ti systems exhibited a photoluminescence emission at 329 nm.

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Section: Optical Properties Of Si/ti and Si/tia Colloidsmentioning

confidence: 95%

UV-Absorption and Silica/Titania Colloids Using a Core–Shell Approach

Zhou

Heinz

Soucek

et al. 2010

Silicon

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“…However the colloidal stability is a main problem for application of fillers in dilute systems. A common approach for increasing the colloidal stability is surface modification of fillers by various materials and subsequent surface grafting polymerization [14].…”

Section: Introductionmentioning

confidence: 99%

Preparation of hydroxyapatite nanoparticles: Comparison between hydrothermal and Solvo-Treatment processes and colloidal stability of produced nanoparticles in a dilute experimental dental adhesive

Sadat‐Shojai

2009

JICS

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The main purpose of this study is to investigate the colloidal stability of hydroxyapatite (HAp) nanoparticles prepared by different methods. Nano-sized hydroxyapatite particles are synthesized by two different methods including hydrothermal and solvo-treatment processes. In hydrothermal process nanoparticles are synthesized at high temperature, while in solvo-treatment method nanoparticles are synthesized at room temperature by the use of surfactants and organic solvent. The samples are characterized by powder X-ray diffraction (XRD), fourier-transformed infrared spectroscopy (FT-IR), scanning electron microscopy coupled with energy dispersive X-ray analysis detector (SEM + EDXA), and phase separation analyzer. The produced nanoparticles are different in size, stoichiometric ratio, morphology, crystallinity and colloidal stability in a dilute dental adhesive. The results show that the nanoparticles synthesized by these two methods are quite dissimilar and particles prepared by hydrothermal method have a smaller size and higher colloidal stability.

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“…To conclude this part, the nano-sized particles of apatite might be functionalized and/or doped by various compounds (even by quantum dots [509,510]) to provide new important properties [495,[511][512][513][514][515][516][517][518], e.g., fluorescence[27-29, 515,516] and luminescence [54,60,510,517,518]. Both fluorescence and luminescence can be used as a tracking property for the nano-sized particles to give an observable indication of agent delivery, while the particles are served to protect the agent in vivo until it has reached the destination.…”

Section: Yearmentioning

confidence: 99%

Nanodimensional and Nanocrystalline Calcium Orthophosphates

Dorozhkin¹

2012

AJBE

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Nano-sized particles and crystals play an important role in the formation of calcified tissues of various animals. For example, nano-sized and nanocrystalline calcium orthophosphates in the form of apatites of biological origin represent the basic inorganic building blocks of bones and teeth of mammals. Namely, according the recent developments in biomineralization, tens to hundreds nanodimensional crystals of a biological apatite are self-assembled into these complex structures. This process occurs under a strict control by bioorganic matrixes. Furthermore, both a greater viability and a better proliferation of various types of cells have been detected on smaller crystals of calcium orthophosphates. Thus, the nano-sized and nanocrystalline forms of calcium orthophosphates have a great potential to revolutionize the hard tissue-engineering field, starting from bone repair and augmentation to controlled drug delivery systems. This review reports on current state of the art and recent developments on the subject, starting from synthesis and characterization to biomedical and clinical applications. Furthermore, the review also discusses possible directions for future research and development.

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In-situ synthesis of reactive hydroxyapatite nano-crystals for a novel approach of surface grafting polymerization

Cited by 83 publications

References 28 publications

UV-Absorption and Silica/Titania Colloids Using a Core–Shell Approach

UV-Absorption and Silica/Titania Colloids Using a Core–Shell Approach

Preparation of hydroxyapatite nanoparticles: Comparison between hydrothermal and Solvo-Treatment processes and colloidal stability of produced nanoparticles in a dilute experimental dental adhesive

Nanodimensional and Nanocrystalline Calcium Orthophosphates

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