Gas Sensing and Dielectric Studies on Cobalt Doped Hydroxyapatite thick films

Mahabole, Megha P.; Khairnar, Ravindra U. Mene;Rajendra S.

doi:10.5185/amlett.2013.icnano.146

Cited by 29 publications

(23 citation statements)

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“…As the hydroxyapatite is rich in Ca, it appears suitable as sensing material for developing CO 2 conductometric sensor. This idea is confirmed in previous studies reported in literature by the research group of Mahabole and collaborators [37]. However, while we attempted to use pure HA for conductometric CO 2 sensor operating at a low temperature (max 150 °C), the baseline resistance resulted out of the measurement range of our instrumentation (>200 MΩ), precluding any investigation.…”

Section: Resultssupporting

confidence: 74%

Monitoring of Chemical Risk Factors for Sudden Infant Death Syndrome (SIDS) by Hydroxyapatite-Graphene-MWCNT Composite-Based Sensors

Sudhan

Lavanya

Leonardi

et al. 2019

Sensors

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Sensing properties of chemical sensors based on ternary hydroxyapatite-graphene-multiwalled carbon nanotube (HA-GN-MWCNT) nanocomposite in the detection of chemical substances representing risk factors for sudden infant death syndrome (SIDS), have been evaluated. Characterization data of the synthesized composite have shown that the graphene-MWCNT network serves as a matrix to uniformly disperse the hydroxyapatite nanoparticles and provide suitable electrical properties required for developing novel electrochemical and conductometric sensors. A HA-GN-MWCNT composite-modified glassy carbon electrode (HA-GN-MWCNT/GCE) has been fabricated and tested for the simultaneous monitoring of nicotine and caffeine by cyclic voltammetry (CV) and square wave voltammetry (SWV), whereas a HA-GN-MWCNT conductive gas sensor has been tested for the detection of CO2 in ambient air. Reported results suggest that the synergic combination of the chemical properties of HA and electrical/electrochemical characteristics of the mixed graphene-MWCNT network play a prominent role in enhancing the electrochemical and gas sensing behavior of the ternary HA-GN-MWCNT hybrid nanostructure. The high performances of the developed sensors make them suitable for monitoring unhealthy actions (e. g. smoking, drinking coffee) in breastfeeding women and environmental factors (bad air quality), which are associated with an enhanced risk for SIDS.

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Section: Resultssupporting

confidence: 74%

Monitoring of Chemical Risk Factors for Sudden Infant Death Syndrome (SIDS) by Hydroxyapatite-Graphene-MWCNT Composite-Based Sensors

Sudhan

Lavanya

Leonardi

et al. 2019

Sensors

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“…4 results in the formation of a new phosphate peak at 903 cm -1 . The intensity of the newly developed peak decreases with the increase in cobalt concentration [13].…”

Section: Afm Studymentioning

confidence: 90%

Cobalt adsorption on the nano-hydroxyapatite matrix: isotherm and kinetic studies

Narwade

Khairnar

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Cobalt radionuclide is one of the prime contaminants generated during operation of pressurized heavy water. The paper reports the study of cobalt adsorption on hydroxyapatite (HAp) nanoceramic. A modified wet chemical precipitation method is used for HAp synthesis. The HAp nano-material is characterized by XRD, FTIR, TG/DTA, AFM, SEM, and EDAX. Experiments are performed in batches to observe the effect of cobalt adsorption on HAp matrix. The adsorption of cobalt on HAp is examined at room temperature. The isotherm and kinetic studies showed that the Freundlich isotherm and pseudo-second order model are the best choices to describe the nature of adsorption. The pH of the reaction mixture is adjusted by the addition of NH 4 OH. As a result of reaction, milky precipitate is obtained. In the wet chemical process, the precipitate is continuously stirred

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“…Occasionally, an interest to both electric/dielectric [304,[377][378][379][380][381][382][383][384][385][386][387][388][389][390] and piezoelectric [391,392] properties of CaPO 4 bioceramics is expressed. For example, a surface ionic conductivity of both porous and dense HA bioceramics was examined for humidity sensor applications, since the room temperature conductivity was influenced by relative humidity [378].…”

Section: Electric/dielectric and Piezoelectric Propertiesmentioning

confidence: 99%

“…Namely, such high-value biological materials, as recombinant proteins, 36 therapeutic antibodies and nucleic acids are separated and purified [781][782][783][784][785][786][787]. Finally, some types of CaPO 4 are used as a component of various sensors [377,378,382,383,388,[788][789][790][791]. However, since these subjects are almost irrelevant to bioceramics, they are not detailed further.…”

Section: Cellular Responsementioning

confidence: 99%

“…For example, a surface ionic conductivity of both porous and dense HA bioceramics was examined for humidity sensor applications, since the room temperature conductivity was influenced by relative humidity [378]. Namely, the ionic conductivity of HA has been a subject of research for its possible use as a gas sensor for alcohol [379], carbon dioxide [377,388] or carbon monoxide [382].…”

Section: Electric/dielectric and Piezoelectric Propertiesmentioning

confidence: 99%

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