Novel synthesis of hafnium oxide nanoparticles by precipitation method and its characterization

Ramadoss, Ananthakumar; Krishnamoorthy, Karthikeyan; Kim, Sang‐Jae

doi:10.1016/j.materresbull.2012.05.051

Cited by 73 publications

(54 citation statements)

References 29 publications

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“…[32][33][34][35][36] In the precipitation method, the chemical reaction is simple, non toxic and less expensive compared to other synthetic methods. This method enables the obtaining of the final product of the particles in nanometer dimension with the narrow size distribution.…”

Section: Articlementioning

confidence: 99%

“…This method enables the obtaining of the final product of the particles in nanometer dimension with the narrow size distribution. 36 In the present study we have adopted for the precipitation method and assessed the cytotoxicity of synthesized HfO 2 NPs for various sizes (8.79, 7.16, 6.78 nm) with 3T3 fibroblast cell lines. To the best of our knowledge this report is the first of its kind to study cytotoxicity of HfO 2 NPs with 3T3 fibroblast cell lines.…”

Section: Articlementioning

confidence: 99%

“…36 The starting materials were hafnium tetrachloride (HfCl 4 and sodium hydroxide (NaOH). Briefly, 0.4 M (100 mL) aqueous solution of NaOH was slowly added drop wise into 0.1 M (100 mL) aqueous solution of (HfCl 4 and allowed to continuous stirring using Teflon coated magnetic bar for 6 h, obtaining a white coloured precipitate containing hafnium hydroxide.…”

Section: Preparationmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and characterization of hafnium oxide nanoparticles for bio-safety

Jayaraman¹,

Ganesan²,

Chinnathambi³

et al. 2014

mat express

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In recent years, the perspective of applying hafnium oxide (HfO 2 ) has geared up in various field of medical science such as neutron detection, bioimplants, biosensors, radiotherapy etc., The present study is to synthesis HfO 2 nanoparticles, and check its cell viability for in vivo applications. Hafnium oxide nanoparticles of different sizes (8.79, 7.16, 6.78 nm) were synthesized by varying the intervals of stirring time (6 h, 8 h, 12 h) by precipitation method. XRD pattern and Raman spectroscopy revealed that this material crystallizes in a monoclinic structure. SEM images and TEM micrographs showed that the HfO 2 NPs were spherical in shape with an average particle size of below 10 nm. The EDAX spectrum showed that the synthesized nanoparticles were HfO 2 . 3T3 fibroblast cell lines were chosen for cytotoxic study as it mimics the human cells. The aim of this study is to compare the toxicity of different sizes of HfO 2 nanoparticles on interaction with 3T3 fibroblast cell lines. From this study we could infer that smaller sized nanoparticles (6.78 and 7.17 nm) have 86% cell viability even at the concentration of 2500 g/mL.

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Section: Articlementioning

confidence: 99%

Section: Articlementioning

confidence: 99%

Section: Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and characterization of hafnium oxide nanoparticles for bio-safety

Jayaraman¹,

Ganesan²,

Chinnathambi³

et al. 2014

mat express

View full text Add to dashboard Cite

show abstract

“…This process was repeated many times until the precipitate was free from any trace impurities. Finally, the obtained product was dried in a hot air oven at 100 °C for 24 h and further calcined at 800 °C for 4 h which results in the formation of HfO2 NPs [22].…”

Section: Preparation Of Hafnium Oxide/graphene Oxide (Ho)/(go) Nanocomentioning

confidence: 99%

“…1. First, hafnium oxide was synthesized which was reported by Ramadoss et al [26]. Second, graphene oxide was prepared using a Hummers method.…”

Section: Preparation and Characterization Of Hafnium Oxide/graphene Omentioning

confidence: 99%

Hafnium Oxide/Graphene Oxide Nanocomposites as Efficient Supercapacitor Electrodes

Jayavel¹,

Ramalakshmi²,

Antony³

et al. 2018

JNST

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This paper reports on the preparation of graphene oxide (GO) modified with hafnium oxide (HO) nanoparticles composites by a simple mixing and their use as efficient electrode in electrochemical supercapacitors. The technique relies on simple mixing the aqueous solutions of hafnium oxide (HO) nanoparticles and graphene oxide (GO) at different ratios of GO content (20, 30 and 40 wt%). The morphological studies, chemical composition and electrochemical behavior of the resulting HO/GO nanocomposites were investigated by using UV/vis spectrometry, X-Ray Diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and electrochemical respectively. The electrochemical performance, including the capacitive behavior of the HO/GO nanocomposites were investigated by cyclic voltammetry and galvanostatic charge-discharge curves. The HO/GO nanocomposites (40 wt%) ratio exhibited the best performance with a specific capacitance of 268 Fg -1 at a scan rate 5 mVs -1 in 1 M H2SO4 and it shows excellent long-term cycle stability.

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Fast Emitting Nanocomposites for High‐Resolution ToF‐PET Imaging Based on Multicomponent Scintillators

Orfano,

Pagano,

Mattei

et al. 2024

Adv Materials Technologies

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Time‐of‐Flight Positron Emission Tomography (ToF‐PET) is a medical imaging technique, based on the detection of two back‐to‐back γ‐photons generated from radiotracers injected into the body. Its limit is the ability of employed scintillation detectors to discriminate in time the arrival of γ‐pairs, that is, the coincidence time resolution (CTR). A CTR < 50 ps will enable fast imaging with ultralow radiotracer dose. Monolithic materials do not have simultaneously the required high light output and fast emission characteristics, thus the concept of scintillating heterostructure is proposed, where the device is made of a dense scintillator coupled to a fast‐emitting light material. Here a composite polymeric scintillator loaded with hafnium oxide nanoparticles is presented. This enhanced by +300% its scintillation yield, by surpassing commercial plastic scintillators. The nanocomposite is coupled to bismuth germanate oxide (BGO) realizing a multilayer metascintillator. The energy sharing between its components is observed, which activates the nanocomposite's fast emission enabling a net CTR improvement of 25% with respect to monolithic BGO. These results demonstrate that a controlled loading with dense nanomaterials is an excellent strategy to enhance the performance of polymeric scintillators for their use in advanced radiation detection and imaging technologies.

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Novel synthesis of hafnium oxide nanoparticles by precipitation method and its characterization

Cited by 73 publications

References 29 publications

Synthesis and characterization of hafnium oxide nanoparticles for bio-safety

Synthesis and characterization of hafnium oxide nanoparticles for bio-safety

Hafnium Oxide/Graphene Oxide Nanocomposites as Efficient Supercapacitor Electrodes

Fast Emitting Nanocomposites for High‐Resolution ToF‐PET Imaging Based on Multicomponent Scintillators

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