Structural, thermal and electrical studies of polyethylene oxide/starch blend containing green synthesized gold nanoparticles

Abdelghany, A.M.; Oraby, A.H.; Asnag, G. M.

doi:10.1016/j.molstruc.2018.11.095

Cited by 67 publications

(20 citation statements)

References 30 publications

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“…which denotes the face-centered cubic structure of AuNPs, these data correspond with data of JCPDS file no. (04-0784) [18]. Figure 4 displays the XRD pattern of PVA/CMC (5) and PVA/CMC doped with different contents of gold NPs.…”

Section: Tem Micrograph Of Aunpsmentioning

confidence: 99%

Enhanced optical, morphological, dielectric, and conductivity properties of gold nanoparticles doped PVA/CMC blend as an application in organoelectronic devices

Atta

Alsulami

Asnag

et al. 2021

Preprint

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Stevia rebaudiana plant leaves were used for biosynthesis of gold nanoparticles (AuNPs). Transmission electron microscope ( TEM ) images showed various shapes and sizes of AuNPs. Various amounts of AuNPs were added to polyvinyl alcohol/carboxymethylcellulose ( PVA / CMC , 40/60) via the casting method. The X-ray diffraction (XRD) spectrum of pure blend shows the amorphous nature of the blend. FT-IR spectra showed the interaction between PVA / CMC and AuNPs. The ultra-violet and visible (UV/VIS.) spectra showed emerge new peak of surface plasmon resonance ( SPR ) of AuNPs for the filled samples. SEM images showed bright spots on the sample's surface, which was attributed to AuNPs. AC conductivity exhibited enhancement after the addition of gold nanoparticles. The ε′ and ε″ were reduced with increasing the frequency due to direction dipoles of applied electric ﬁeld. Because of the mobile charges inside the polymeric backbone, higher values of ε′ and ε″ were observed at low frequencies. The tanδ showed increased with an increase in AuNPs concentration and at the decrease the frequency, as expected.

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Section: Tem Micrograph Of Aunpsmentioning

confidence: 99%

Enhanced optical, morphological, dielectric, and conductivity properties of gold nanoparticles doped PVA/CMC blend as an application in organoelectronic devices

Atta

Alsulami

Asnag

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Gold nanoparticles were synthesized using Chenopodium murale leaf extract previously discussed. 16,17 To ensure reproducibility of the preparation method triplicate samples were prepared at the same condition of temperature and pH values, while average result were recorded which may be result in wide range of particle sizes from 3-32 nm and various shapes.…”

Section: Synthesis Of Gold Nanoparticlesmentioning

confidence: 99%

“…5 depicts that Au NPs have different shapes, such as cubic, hexagonal, spherical, and irregular shapes. 17…”

Section: Transmission Electron Microscopy (Tem)mentioning

confidence: 99%

Optical and dielectric characteristics of polyethylene oxide/sodium alginate-modified gold nanocomposites

2020

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“…The appropriate electrical characteristics for extracting certain phenomena like conductivity relaxation times and electrode polarization can be analyzed by the complex electric modulus formalism [69]. The expression below can manifest the complex electrical modulus:…”

Section: Electrical Modulus Analysismentioning

confidence: 99%

Structural, thermal, optical and conductive properties of PAM/PVA polymer composite doped with Ag nanoparticles for electrochemical application

Ragab

Rajeh²

2020

J Mater Sci: Mater Electron

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In the present study, the chemical preparation of silver nanoparticles (Ag NPs) solution was achieved by decreasing silver salt via the use of sodium borohydride (NaBH 4). The particles appeared to have a crystalline nature through the XRD study, with a face-centered cubic (FCC) structure. The formation of silver nanoparticles (Ag NPs) was asserted by the UV, XRD and TEM. An absorption peak at around 430 nm was demonstrated through UV-visible spectrum of the aqueous medium which related to of Ag NPs. The solution casting method was used to prepare new nanocomposites films on the bases of polymer blend which related to of PAM-and PVA-doped with different wt% of Ag NPs. Various analytical techniques were used to characterize the prepared films. It was confirmed through the XRD analysis that there existed a complex formation between polymer blend and Ag NPs. A reduction in the value of the optical bandgap was displayed by UV-Vis with an increase in the concentration of Ag NPs. It was shown through the FTIR spectrum that there existed changes in the FTIR spectrum with dopant concentration indicating the interaction of dopant with the polymer blend. A great improvement in the thermal stability of the composites was proved through the TGA study with the loading of Ag NPs. The ionic conductivity at room temperature was improved by the doping of Ag NPs ions into the polymer blend system. This is attributed to the increase in mobile charge carriers and their mobility. The dielectric values in the studied frequency range indicate a strong dielectric dispersion which increases as the content of the Ag NPs increases. Consequently, these films can be suggested as a suitable application in optical devices and dielectric applications due to the observed improvement in optical properties and ac conductivity.

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Structural, thermal and electrical studies of polyethylene oxide/starch blend containing green synthesized gold nanoparticles

Cited by 67 publications

References 30 publications

Enhanced optical, morphological, dielectric, and conductivity properties of gold nanoparticles doped PVA/CMC blend as an application in organoelectronic devices

Enhanced optical, morphological, dielectric, and conductivity properties of gold nanoparticles doped PVA/CMC blend as an application in organoelectronic devices

Optical and dielectric characteristics of polyethylene oxide/sodium alginate-modified gold nanocomposites

Structural, thermal, optical and conductive properties of PAM/PVA polymer composite doped with Ag nanoparticles for electrochemical application

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