Dielectric relaxation of CdO nanoparticles

Tripathi, Ramna; Dutta, Alo; Das, S.; Kumar, Arvind; Sinha, T. P.

doi:10.1007/s13204-015-0427-5

Cited by 40 publications

(19 citation statements)

References 26 publications

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“…The absorption edge of the sample was observed at λ ~ 379 nm, suggesting a band gap of E g (eV) = 1240 (eV.nm)/λ (nm) = 1240 eV.nm /379 nm = 3.27 eV. This band gap of 3.27 eV is reflective of the composite nature of the powder obtained as it lies between the band gap values obtained for pure CdO ( E g = 2.36 eV) and CdCO 3 ( E g = 3.87 eV) 19 , 25 , 26 . The absorbance peak observed at 279 nm can be ascribed to water in which particles of the CdO/CdCO 3 composite were dispersed 39 .…”

Section: Resultsmentioning

confidence: 66%

CdO/CdCO3 nanocomposite physical properties and cytotoxicity against selected breast cancer cell lines

Lefojane

Sone

Matinise

et al. 2021

Sci Rep

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Cadmium Oxide nanoparticles have the lowest toxicity when compared to nanoparticles of other semiconductors and they are not detrimental to human and mammalian cells, thereby making them candidates for targeting cancer cells. Synadenium cupulare plant extracts were used to synthesize CdO/CdCO3 nanocomposite using cadmium nitrate tetrahydrate 98% as a precursor salt. The resultant nanoparticles were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy, ultraviolet visible spectroscopy, and Fourier transform infrared spectroscopy (FTIR). The nanoparticles were then screened for effect on breast cancer cell lines (MCF-7 and MDA MB-231) and Vero cell line to determine their growth inhibition effect. Cytotoxicity effect was evaluated using 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. XRD showed the peaks of monteponite CdO and otavite CdCO3 nanoparticles. TEM results showed irregular and spherical particles of varying sizes, whilst SEM revealed a non-uniform morphology. FTIR results showed peaks of functional groups which are present in some of the phytochemical compounds found in S. cupulare, and point to the presence of CdO. Annealed CdO/CdCO3 NPs showed selectivity for MCF7 and MDA MB231 in comparison to Vero cell line, thereby supporting the hypothesis that cadmium oxide nanoparticles inhibit growth of cancerous cells more than non-cancerous cells.

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Section: Resultsmentioning

confidence: 66%

CdO/CdCO3 nanocomposite physical properties and cytotoxicity against selected breast cancer cell lines

Lefojane

Sone

Matinise

et al. 2021

Sci Rep

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“…The spectrum reveals absorption bands at around 545.6 cm −1 and 408.1 cm −1 . These bands are due to Cd 2+ -O 2stretching vibrations on tetrahedral and octahedral sites [27][28][29].…”

Section: Ftir Analysismentioning

confidence: 99%

Synthesis of Cadmium Oxide Nanoparticles by Electrochemical Method: Its Photodegradative Effects on Carboxylic Acids and Antibacterial Behaviours

Kumar¹,

Shilpa²,

Ananda³

2019

JNST

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Cadmium oxide (CdO) nanomaterial has been synthesized by electrochemical method which is simple and inexpensive method. The synthesized cadmium oxide nanomaterial was used as a catalyst for the photocatalytic degradation of acetic acid, formic acid and oxalic acids under varies experimental conditions by volumetric method. The synthesized nanomaterials were characterized by various techniques such as UV-Visible spectroscopy, SEM-EDAX, FT-IR spectrum and X-ray diffraction studies. The UV-VIS spectroscopy study revealed that the band gap energy of cadmium oxide nanomaterials to be 2. 85 eV Tauc plot. The structure of cadmium oxide was found to be cubic structure and crystal size was found to be 32 nm which was confirmed from XRD data. SEM reports showed that the cadmium oxide nanomaterials have regular spherical shape and uniform size. The presence of cadmium and oxygen in the nanomaterial is confirmed from the EDAX spectrum. FT-IR spectra reveal the presence of characteristic band corresponds to Cd-O mode. The photocatalytic activity of the synthesized cadmium oxide nanomaterial was examined by the kinetics of photodegradation of carboxylic acids by volumetric method by using NaOH solution. Taft LFER was tested the isokinetic temperature β was calculated for oxidation of carboxylic acids. The antibacterial activity of cadmium oxide nanomaterial was investigated.

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“…Thus, a position shift probably occurs as the concentration of GeO 2 and CdO changes. At this respect, absorption bands of Cd-O bonds in CdO are reported to appear at 620 cm −1 which is visible only for samples C79 and C80 [22]. In the low wavenumber region, around 500-600 cm −1 , there is an absorption band of symmetric stretching vibrations of Ge─O─Ge at 566 cm −1 [23].…”

Section: Infrared Spectramentioning

confidence: 99%

Nanocrystallization of the Cd3Al2Ge3O12 Garnet in Glasses of the CdO-TeO2-GeO2 System

Alvarado-Rivera¹,

Hernández²,

Zayas³

et al. 2018

Advances in Glass Science and Technology

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In this study, a series of glasses of the system xCdO-10TeO 2-(90−x)GeO 2 were fabricated, varying the modifier oxide content from 10 to 80 wt%. According to XRD analysis, partial crystallization occurred for the glass 60CdO.10TeO 2 .30GeO 2 presenting the formation of GeO 2 and CdTeO 3 ; the 70CdO.10TeO 2 .20GeO 2 glass shows sharp diffraction peaks corresponding to the Cd 3 Al 2 Ge 3 O 12 garnet crystalline phase. Transmission electron microscopy showed that the garnet crystals have sizes below 20 nm. At the highest concentration of CdO (80 wt%), a transparent orange glass can be obtained, and this sample can be identified as an inverted glass where CdO participates as a network former. The optical band gap of the glasses decreases as CdO content increases from 3.91 to 3.0 eV. In general, all glasses show a typical broad emission when excited with UV light (325 nm); chromatic coordinates were calculated and pointed out the presence of emissions in the white, green, and yellow regions. In summary, the obtained glasses are a promising material for IR technologies, nonlinear optics, and design of solid state lighting devices.

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Dielectric relaxation of CdO nanoparticles

Cited by 40 publications

References 26 publications

CdO/CdCO3 nanocomposite physical properties and cytotoxicity against selected breast cancer cell lines

CdO/CdCO3 nanocomposite physical properties and cytotoxicity against selected breast cancer cell lines

Synthesis of Cadmium Oxide Nanoparticles by Electrochemical Method: Its Photodegradative Effects on Carboxylic Acids and Antibacterial Behaviours

Nanocrystallization of the Cd3Al2Ge3O12 Garnet in Glasses of the CdO-TeO2-GeO2 System

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