Cytotoxicity and degradation behavior of potassium sodium niobate piezoelectric ceramics

Yu, Sheng-Wen; Kuo, Shu-Ting; Tuan, Wei‐Hsing; Tsai, Yu-Yu; Wang, Sea-Fu

doi:10.1016/j.ceramint.2011.11.056

Cited by 59 publications

(40 citation statements)

References 25 publications

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“…[37] monodispersibility and low cytotoxicity of niobates for the small quantity used in the present samples (less that 1% of Nb). 38 Anyhow, more studies about the niobate toxicities are necessary if the interest is to administer the current nanocrystals orally or injected in the blood stream. In this way, investigations about the niobates toxicity of the investigated samples are being carried out as well as synthesis of samples with coating/shell to reduce it totally.…”

Section: Resultsmentioning

confidence: 99%

Two Photon Thermal Sensing in Er3+/Yb3+ Co-Doped Nanocrystalline NaNbO3

Kumar¹,

Santos²,

Silva³

et al. 2013

j. nanosci. nanotech.

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We investigate the potential use of two-photon absorption of Er3+/Yb3+ co-doped NaNbO3 nanocrystals for nanothermometry as well as thermal imaging, based on the thermally coupled green Er3+ emission lines. In fact, thermal sensor in the range of 20-80 degrees C with -0.1 degrees C accuracy using excitation powers readily obtained from commercially available semiconductor laser was achieved. The pump-intensity induced local heating was also investigated upon femtosecond laser excitation and 0.55 K/kW x cm(-2) was achieved. The highly efficient green emission together with two-photon dependence and femtosecond laser excitation should increase the brightness of thermal imaging. Additionally, the high temperature-sensitive fluorescence, when compared to previous literatures, should increase the resolution of nanothermometers.

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Section: Resultsmentioning

confidence: 99%

Two Photon Thermal Sensing in Er3+/Yb3+ Co-Doped Nanocrystalline NaNbO3

Kumar¹,

Santos²,

Silva³

et al. 2013

j. nanosci. nanotech.

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“…Nacer et al 10 22 concluded that BaTiO3's piezoelectric capacity is greater when implanted, when compared to synthetic hydroxyapatite.…”

Section: Discussionmentioning

confidence: 99%

Biocompatibility and osteogenesis of the castor bean polymer doped with silica (SiO2) or barium titanate (BaTiO3) nanoparticles

Nacer¹,

Silva²,

Poppi³

et al. 2015

Acta Cir. Bras.

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PURPOSE:To evaluate the biocompatibility and osteogenesis of castor oil polymer doped with SiO 2 or BaTiO 3 nanoparticles. METHODS:Twenty four male rats Wistar were submitted to bone defect filled with castor oil polymer. The animals were distributed in RESULTS:The implants were biocompatible and allowed for progressive osteogenesis through osteoconduction in both observation periods. There was significant bone neoformation at 30 and 60 days in both groups within the histomorphometric evaluation, but group 1's osteogenesis was lesser in the 30 and 60-day periods observed when compared to the animals of group 2. The MEV morphometric evaluation evidenced a lesser percentage of osseous tissue filling within the BaTiO2-doped polymer. CONCLUSION:The castor oil polymer doped with SiO2 or BaTiO3 remained biocompatible and allowed for progressive osteogenesis in both observation periods.

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“…42 They revealed that K + and Na + were released in a similar trend while the release of Nb 5+ was two orders of magnitude lower after 28 days. In one study, Yu et al have recently investigated dissolution behavior of undoped and Li-doped KNN in only saline solution close to neutral pH for cytotoxicity studies.…”

Section: Introductionmentioning

confidence: 96%

Chemical stability of KNbO₃, NaNbO₃, and K_0.5Na_0.5NbO₃ in aqueous medium

2017

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In recent years, potassium sodium niobate (K0.5Na0.5NbO3, KNN) has become popular and promising among perovskite lead‐free piezoceramic systems. In this study, the chemical stability of KNN powders in aqueous medium was investigated as a function of pH, time, and powder surface area. To better understand the dissolution behavior of the complex KNN stoichiometry, subconstituents such as potassium niobate (KNbO3, KN) and sodium niobate (NaNbO3, NN) were investigated separately first. Results showed that all of the cations in the structure underwent dissolution in different values. Indicating that KNN undergoes incongruent dissolution in aqueous medium, the dissolution of A site cations was higher at lower pH while the dissolution of B site cations increased at higher initial pH. The order of released cation concentrations (CA1 = K > CA2 = Na > CB = Nb) fits with inverse relationship of cation field strength (FS) order, B = Nb5+FS > A2 = Na+FS>A1 = K+FS, at pH 4, 7 and 10 for NN, KN, and KNN. Calculated diffuse layer thickness from the ICP data confirmed to outer amorphous layer in TEM image. Also, the ratio of normalized cation concentration versus surface area of powders showed that incongruent dissolution kinetic was driven by the diffusion step.

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Cytotoxicity and degradation behavior of potassium sodium niobate piezoelectric ceramics

Cited by 59 publications

References 25 publications

Two Photon Thermal Sensing in Er<SUP>3+</SUP>/Yb<SUP>3+</SUP> Co-Doped Nanocrystalline NaNbO<SUB>3</SUB>

Two Photon Thermal Sensing in Er<SUP>3+</SUP>/Yb<SUP>3+</SUP> Co-Doped Nanocrystalline NaNbO<SUB>3</SUB>

Biocompatibility and osteogenesis of the castor bean polymer doped with silica (SiO2) or barium titanate (BaTiO3) nanoparticles

Chemical stability of KNbO₃, NaNbO₃, and K_0.5Na_0.5NbO₃ in aqueous medium

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Cytotoxicity and degradation behavior of potassium sodium niobate piezoelectric ceramics

Cited by 59 publications

References 25 publications

Two Photon Thermal Sensing in Er<SUP>3+</SUP>/Yb<SUP>3+</SUP> Co-Doped Nanocrystalline NaNbO<SUB>3</SUB>

Two Photon Thermal Sensing in Er<SUP>3+</SUP>/Yb<SUP>3+</SUP> Co-Doped Nanocrystalline NaNbO<SUB>3</SUB>

Biocompatibility and osteogenesis of the castor bean polymer doped with silica (SiO2) or barium titanate (BaTiO3) nanoparticles

Chemical stability of KNbO3, NaNbO3, and K0.5Na0.5NbO3 in aqueous medium

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Chemical stability of KNbO₃, NaNbO₃, and K_0.5Na_0.5NbO₃ in aqueous medium