Nano-Ag doping induced changes in optical and electrical behaviour of PVA films

Mahendia, Suman; Tomar, Amit; Kumar, S.

doi:10.1016/j.mseb.2011.01.008

Cited by 74 publications

(34 citation statements)

References 21 publications

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“…It has been well quoted in literature that PVA, more generally, exhibits the indirect band transition between the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) band edges [3,26,27]. The value of this indirect optical energy gap (E g ) has been determined using the Tauc's relation [28], by extrapolating the lines fitted linearly on value of (ahm) 1/2 (a is the absorption coefficient corresponding to the fundamental absorption edge) plotted as a function of photon energy (hm) as shown in Fig.…”

Section: Optical Characterizationmentioning

confidence: 99%

“…This is due to the fact that incorporation of the nanoparticles into polymer matrix significantly affects its optical, thermal and electrical properties [3,4] while retaining its inherent characteristics. It opens a new gateway in developing the materials for improved performance [5] in many potential applications like optical devices, biomedical science, coating materials and SPR and SERS based biosensors [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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γ-Irradiated PVA/Ag nanocomposite films: Materials for optical applications

Chahal

Mahendia

Tomar

et al. 2012

Journal of Alloys and Compounds

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171

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Section: Optical Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

γ-Irradiated PVA/Ag nanocomposite films: Materials for optical applications

Chahal

Mahendia

Tomar

et al. 2012

Journal of Alloys and Compounds

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171

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“…At higher Ag + ion concentration, Ag nanosphere with larger size was formed. The size of nano-particles, size distribution, and uniform dispersity increases with increasing Ag + ion concentration (Mahendia et al, 2011). Fig.…”

Section: Tem Of Ag/ Pvp Nanocompositesmentioning

confidence: 85%

Synthesis of Highly Mono-dispersed AgNPs within PVP Matrix via Gamma Irradiation

2014

Egypt. J. Rad.Sci.

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AMMA-RADIATION synthesized silver/poly(vinyl pyrrolidone) (Ag/PVP) nanocomposite films were prepared using PVP as a stabilizer. The prepared films were characterized by Ultra Violet/ Visible (UV/vis) spectroscopy, Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD) and Fourier Transform Infera Red (FTIR). The UV/vis analysis showed the appearance of surface plasmon resonance peaks at 403-406 nm confirming the formation of silver nanoparticles (AgNPs). The TEM images confirmed the formation of a highly mono-disperse and narrow size distributed AgNPs and the particle size was increased by increasing Ag + ion molar concentration. The XRD patterns exhibit four diffraction peaks revealed that the AgNPs are formed within PVP matrix and its crystal structure is face centre cubic (fcc) structure. The calculated values of crystalline particle size (D,nm) showed that both AgNO 3 molar concentration and irradiation dose are determining factors in controlling the particle size of AgNPs. FTIR spectra illustrate that the formation Ag/ PVP nano-composites leads to change in peak position, peak shape and peak intensity of the characteristic peaks. The differences in the Ag/PVP nanocomposite spectrum compared to that of pure PVP indicated the formation of coordination bonding between nitrogen and AgNPs, as well as between oxygen and AgNPs.

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“…PVA has carbon chain back bone with hydroxyl groups (OH) attached to methane carbons, can be a source of hydrogen bonding and, assist the formation of polymer complexes. It has excellent mechanical property and shows both ionic and electronic conduction [1,[3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…It is less expensive than lithium and much more abundant [7]. The dielectric constant and the dissipation factors reveal much information on the chemical and physical state of the polymer and required for designing SPEs [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Ionic conductivity studies in crystalline PVA/NaAlg polymer blend electrolyte doped with alkali salt KCl

Sheela¹,

Bhajantri²,

Ravindrachary³

et al. 2014

AIP Conference Proceedings

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Potassium Chloride (KCl) doped poly(vinyl alcohol) (PVA)/sodium alginate (NaAlg) in 60:40 wt% polymer blend electrolytes were prepared by solution casting method. The complexation of KCl with host PVA/NaAlg blend is confirmed by FTIR and UV-Vis spectra. The XRD studies show that the crystallinity of the prepared blends increases with increase in doping. The dc conductivity increases with increase in dopant concentration. Temperature dependent dc conductivity shows an Arrhenius behavior. The dielectric properties show that both the dielectric constant and dielectric loss increases with increase in KCl doping concentration and decreases with frequency. The cole-cole plots show a decrease in bulk resistance, indicates the increase in ac conductivity, due to increase in charge carrier mobility. The doping of KCl enhances the mechanical properties of PVA/NaAlg, such as Young's modulus, tensile strength, stiffness.

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Nano-Ag doping induced changes in optical and electrical behaviour of PVA films

Cited by 74 publications

References 21 publications

γ-Irradiated PVA/Ag nanocomposite films: Materials for optical applications

γ-Irradiated PVA/Ag nanocomposite films: Materials for optical applications

Synthesis of Highly Mono-dispersed AgNPs within PVP Matrix via Gamma Irradiation

Ionic conductivity studies in crystalline PVA/NaAlg polymer blend electrolyte doped with alkali salt KCl

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