ICMMS-2: Zinc Oxide nano-rods: Challenges for Glucose Biosensors

Wahab, H. A.; Saeid, Aziza A. El; Salama, Ahmed; Battisha, I. K.

doi:10.21608/ejchem.2021.55880.3191

Cited by 3 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are many routes for the fabrication of Fe-doped nanoparticles such as the co-precipitation method, solid-state reaction, sol-gel, hydrothermal synthesis, arc plasma [17] and solution combustion method [18][19][20][21][22][23]. We selected the sol-gel method for these reasons: its easiness, low cost, safe, low temperature of synthesis, versatility, ease to handle, and the non-vacuum method for preparing ZnO materials over other synthesis methods [24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Room temperature ferromagnetism and dielectric enhancement in nanocomposites ZnO doped with iron

Battisha

Arais

Shams

2022

J Mater Sci: Mater Electron

Self Cite

View full text Add to dashboard Cite

Pure and iron with different concentrations (0.2, 1, 5, 10, 15, 20, 25, 30, 35 and 40 Mol. %) doped zinc oxide, symbolic as Zn: (0.2, 1, 5, 10, 15, 20, 25, 30, 35 and 40 Fe Mol. %) were synthesized using the self-modified sol–gel technique in powder form. Structural and morphological properties of the samples were studied comparatively by (XRD), (XPS), (FESEM), and (HRTEM), which revealed that the used samples adapted the hexagonal wurtzite structure. Some structural parameters such as strain, crystalline size, and dislocation density, were calculated to have accurate investigation giving rise to the nanostructure phase. The Laser-based Raman micro-spectroscopy presents the homogenous distribution of the iron oxide. The sensing performance of the samples toward the effect of increasing the temperature (from 25 to 150 °C) on the dielectric high-frequency range between 1 MHz up and 1 GHz was investigated with the help of a network impedance analyser (KEYSIGHT-E4991B). The mentioned increase in temperature record ε′ increases values while, it decreases by increasing the frequency, indicating a Debye-type dielectric dispersion. Compared to pure zinc oxide, an enhancement in both (σac) and the impedance real part Z′ was observed in the nanocomposite Z0.2F sample at higher dielectric temperature up to 130 °C. In contrast to pure ZnO, the area of the hysteresis loop against iron concentration for the doped samples increases with an increase in iron concentration. This behavior enhances ferromagnetism in Fe-doped ZnO nanostructure material.

show abstract

Section: Introductionmentioning

confidence: 99%

Room temperature ferromagnetism and dielectric enhancement in nanocomposites ZnO doped with iron

Battisha

Arais

Shams

2022

J Mater Sci: Mater Electron

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is clearly seen that the absorption peak positions presence were assigned according to the Er 3+ ions excited levels. The spectrum obtains 10 bands originated from the ground 4 and 1.7512 sintered at 950°C, respectively. Table 1 and Figure 5 give information of the increment in the (n) values by increasing both Er 3+ ion concentrations and sintering temperature, associated with the materials condensation and densification.…”

Section: Opticalmentioning

confidence: 99%

“…Enhanced lightambient interaction is one unique waveguide geometry property, namely slot waveguide, which is the ability to guide and confine the light in high refractive index material embedded between low refractive index materials. Er 3+ ion has an important emission peak around 1.5 µm corresponding to 4 I 13/2 → 4 I 15/2 transition. This transition attracted attention due to that it located in the ultra-low-loss telecommunication window of thin film glass, usually observed between around 1400 and 1650 nm wavenumbers.…”

Section: Introductionmentioning

confidence: 99%

“…The spin coating is extensively investigated for optical waveguide fabrication as it produced high quality thin films at room temperature without the need of expensive vacuum systems and standard pressure [12]. Both mesoporous silica and phospho-silicate still remain the more suitable hosts and adsorbents for their unique features such as highly ordered structures and narrow mesopore size distributions [3][4][5]10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Increasing Temperature on 1.5 μm Spectroscopic Emission of Er<sup>3+</sup> Ions Activated Phospho-silicate Thin Film

Ahmed¹,

Ayoub²,

Hashem³

et al. 2021

IJPP

View full text Add to dashboard Cite

Different concentrations of Er 3+ ions-embedded nano-composite phospho-silicate ranging from 1 up to 3.5 mol % in thin film, symbolic as (S20P), (S20P1Er)T, (S20P2.5Er)T and (S20P3.5Er)T, respectively were prepared as advanced materials for planar waveguide application. Spin coating sol gel technique will be used to prepare the thin films. The prepared thin films optical and spectroscopic assessments were performed using transmittance, absorption, Raman, photoluminescence and refractive index (n) calculations. The observed transmittance T (%) and reflectance R (%) spectra were measured using Jasco V-570 spectrophotometer, in wavelength range (0.2-2.5 µm), confirmed good transparency for the prepared films, where the T (%) was higher than 92% and S20P1ErT was the most transparent one. The mentioned higher transparency presence was considered as a big challenge, especially after doping the silica gel with such higher phosphorus molar percent up to 20 mol %. Such challenge confirmed that the prepared thin films were suitable for the low losses and active planar waveguide fabrication. The room temperature photoluminescence (RTPL) quenching was observed at lower temperature 100°C for (S20P3.5Er)T. Emission at 1.5 µm upon excitation at 514.5 nm was detected and characteristic to the 4 I 13/2 → 4 I 15/2 erbium ions intra-4F transition for all prepared samples. The morphology of the prepared thin films was examined by using the Field emission scanning electron microscope (FESEM), while the measured film thickness obtained from cross section view from the (FESEM) give rise to 1.791 µm value for (S20P3.5Er)T. The bigger moderate thickness than 1 µm was an adequate parameter for supporting planar optical wave guide applications.

show abstract

“…Silica gels are the most suitable net -work for this application due to their chemical inertness, large accessible surface area, high porosity, transparency, low thermal expansion coefficient, exceptional mechanical, electrical, optical and magnetic properties [8,9,16,19] . Cobalt oxide nanoparticles embedded in a silica matrix by adopting different preparation methods such as sol-gel [17] , hydrothermal, grafting, chemical vapor deposition and direct solution impregnation methods [2] . Cobalt silica composite materials have been widely studied for many technological applications such as catalysis, magnetic recording, sensing, gas sensor, and super capacitance [15] .Cobalt oxide is an active material having multi oxidation states and silica has a porous structure.…”

Section: Introductionmentioning

confidence: 99%

Silica gel doped with cobalt oxide prepared by sol-gel technique; improving dielectric charge storage

Hamid¹,

Battisha

Shahin

2022

JAP

View full text Add to dashboard Cite

The structural, morphology and magnetic properties of Cobalt oxide embedded in silica gel with 10 mol. %, in monolith form, sintered at different temperature ranging from 60 up to 1300ºC, respectively recorded as (SC(60-1300) were prepared by a modified sol gel technique. The sintering temperature effect on the crystallization, surface morphology and magnetic behaviors of the prepared samples will be study, Phase identification by using surface morphology and X-ray diffraction will be study by using Transmission electron microscope (TEM) and Field emission scanning electron microscope imaging (FESEM). The nano-scale presence and the formation of the α-cristobalyte tetragonal phase of silica gel as well as the doped samples with cobalt oxide crystallinity enhancement were detected using the mentioned techniques. FTIR spectra were being study. The saturation magnetization (Ms), remnant magnetization (Mr) and coercive force (Hc), was founded to be equl to 0.183,0.031 emu/g and 46.7Oe respectively. The A. C. conductivity increased by increasing the temperature .Therefore, by increasing the sintering temperature of the silica gel network doped withCo3O4are applicant for several electronic and industrial devices with improved dielectric charge storage capacity and strength.

show abstract

ICMMS-2: Zinc Oxide nano-rods: Challenges for Glucose Biosensors

Cited by 3 publications

References 0 publications

Room temperature ferromagnetism and dielectric enhancement in nanocomposites ZnO doped with iron

Room temperature ferromagnetism and dielectric enhancement in nanocomposites ZnO doped with iron

Effect of Increasing Temperature on 1.5 μm Spectroscopic Emission of Er<sup>3+</sup> Ions Activated Phospho-silicate Thin Film

Silica gel doped with cobalt oxide prepared by sol-gel technique; improving dielectric charge storage

Contact Info

Product

Resources

About

ICMMS-2: Zinc Oxide nano-rods: Challenges for Glucose Biosensors

Cited by 3 publications

References 0 publications

Room temperature ferromagnetism and dielectric enhancement in nanocomposites ZnO doped with iron

Room temperature ferromagnetism and dielectric enhancement in nanocomposites ZnO doped with iron

Effect of Increasing Temperature on 1.5 μm Spectroscopic Emission of Er&lt;sup&gt;3+&lt;/sup&gt; Ions Activated Phospho-silicate Thin Film

Silica gel doped with cobalt oxide prepared by sol-gel technique; improving dielectric charge storage

Contact Info

Product

Resources

About

Effect of Increasing Temperature on 1.5 μm Spectroscopic Emission of Er<sup>3+</sup> Ions Activated Phospho-silicate Thin Film