Synthesis, structural, optical and electrical properties of metal nanoparticle–rare earth ion dispersed in polymer film

Kumar, Brijesh; Kaur, Gagandeep; Singh, Prabhakar; B., S.

doi:10.1007/s00340-012-5259-3

Cited by 14 publications

(9 citation statements)

References 38 publications

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“…[39] The magnitude of SPR also correlates with the presence and absence of p-bond in the dispersing medium. [40] If MNPs' dispersed system is thermally treated, then thermal expansion of copper nanoparticles shows the dominant mechanism of temperature-induced red shift of the SPR. [41] The absorption spectra for HAT4, CuNPs and HAT4 C CuNPs are shown in Figure 8.…”

Section: Systemmentioning

confidence: 99%

Effects of copper nanoparticles on the thermodynamic, electrical and optical properties of a disc-shaped liquid crystalline material showing columnar phase

2015

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Thermodynamic, electrical and optical studies have been carried out on a discotic liquid crystal (DLC), namely 2, 3, 6, 7, 10, 11-hexabutyloxytriphenylene (possessing columnar phase) and its copper nanoparticles (0.6 wt%) based composite. The ionic conductivity of DLCÀcopper nanocomposite has increased by about two orders of magnitude as compared to the pure system. Dielectric permittivity has also increased. The absorption spectra for pure and nanocomposites have been studied by UVÀVis spectrophotometer. The optical study suggests that surface plasmon resonance has been introduced in DLC due to the incorporation of copper nanoparticles. It has been observed that the presence of nanoparticles has decreased the optical band gap to 3.3 eV from 4.2 eV of the pure DLC. Enhanced properties are useful for onedimensional conduction and photovoltaic applications.

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Section: Systemmentioning

confidence: 99%

Effects of copper nanoparticles on the thermodynamic, electrical and optical properties of a disc-shaped liquid crystalline material showing columnar phase

2015

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“…The second available option for the augmentation efect is via local energy ield of NPs acting on the lanthanide ions positioned in their propinquity. This efect is prominent in particular when there is a matching of the surface plasmon resonance wavelength of the NPs and the incident light beam wavelength or luminescence wavelength [7,26]. High surface-to-volume ratio and local phenomena such as absorption or changes in the surface electronic state may contribute signiicantly to special properties.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Investigations on Polyvinyl Alcohol Film with Complex of Terbium Ions along with Bismuth Nanoparticles for Improved Green Emission

Kaur¹,

Kumar²,

Rai³

2017

Acrylic Polymers in Healthcare

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In this chapter, bismuth nanoparticles (NPs) have been synthesized by the pulsed laser ablation technique at diferent pH in diferent aqueous solutions (namely, water (H), water + sodium hydroxide (HN), and water + hydrochloric acid (HC)). The NPs in aqueous solutions have been characterized by transmission electron microscopy (TEM) and UV-Vis-NIR absorption techniques. The NPs are spherical, core shell, and hollow spheres in H, HN, and HC, respectively. The vibrational features have been studied using Raman technique and correlated with solid NPs, hollow NPs, core shell NPs, and NPs complex, etc. The Bi NPs were subsequently scatered with Tb 3+ ions and their complex with salicylic acid (Sal) and 1,10-phenanthroline in aqueous solution of polyvinyl alcohol to get thin polymer ilms. Then photoluminescence properties of Tb 3+ ions and the (Tb(Sal) 3 (Phen)) complex were studied using 266 nm and 355 nm as excitation wavelengths to seek into the inluence of Bi NPs on their emissive properties. Terbium ions in case of (Tb(Sal) 3 (Phen)) complex together with NPs demonstrate an intense and extended emission spectrum in the 375-700 nm range for transition arising even from

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“…1 Nanoparticles (NPs) exhibit unique electrical properties different from those of bulk metals due to quantum size effects. 9 Among these, the pulsed laser ablation of a metal target has attracted great attention due to its simplicity and purity. NPs of various elements such as Ag, Au, Pt, Si, C and Co have been prepared to study their properties in nano-regimes and observe their inuences on neighbouring particles.…”

Section: Introductionmentioning

confidence: 99%

“…NPs of various elements such as Ag, Au, Pt, Si, C and Co have been prepared to study their properties in nano-regimes and observe their inuences on neighbouring particles. 9,13 Polyvinyl alcohol is a semi-crystalline polymer. 7,8 The fabrication process plays an important role in the properties of nanoparticles such as crystallite size, shape and particle size distribution.…”

Section: Introductionmentioning

confidence: 99%

Anomalous electrical properties of poly vinyl alcohol films with Tb³⁺ ions and copper nanoparticles in different solvents

et al. 2015

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Laser ablation was used to fabricate copper nanoparticles (NPs) in different solvents from sodium lauryl sulphate, acetone and ethanol by applying 1064 nm radiation from a Nd:YAG laser. The sizes and shapes of the colloidal Cu NPs were investigated by transmission electron microscopy (TEM). The electrical conductivities of Tb 3+ in polymer films with Cu NPs were measured in the frequency range of 20 Hz to 1 MHz and the temperature range of 308-343 K. It was found that the electrical conductivity of Tb 3+ was greater for larger Cu NPs with sizes ranging from 20-40 nm in ethanol as compared to Cu NPs with smaller dimensions formed in the other two solvents. It was concluded that using ethanol as the solvent enhanced the electrical conductivity of Tb 3+ in the polymer film. The activation energy as well as the variation in the loss tangent with temperature also explains the enhanced electrical conductivity.

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Synthesis, structural, optical and electrical properties of metal nanoparticle–rare earth ion dispersed in polymer film

Cited by 14 publications

References 38 publications

Effects of copper nanoparticles on the thermodynamic, electrical and optical properties of a disc-shaped liquid crystalline material showing columnar phase

Effects of copper nanoparticles on the thermodynamic, electrical and optical properties of a disc-shaped liquid crystalline material showing columnar phase

Spectroscopic Investigations on Polyvinyl Alcohol Film with Complex of Terbium Ions along with Bismuth Nanoparticles for Improved Green Emission

Anomalous electrical properties of poly vinyl alcohol films with Tb³⁺ ions and copper nanoparticles in different solvents

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Synthesis, structural, optical and electrical properties of metal nanoparticle–rare earth ion dispersed in polymer film

Cited by 14 publications

References 38 publications

Effects of copper nanoparticles on the thermodynamic, electrical and optical properties of a disc-shaped liquid crystalline material showing columnar phase

Effects of copper nanoparticles on the thermodynamic, electrical and optical properties of a disc-shaped liquid crystalline material showing columnar phase

Spectroscopic Investigations on Polyvinyl Alcohol Film with Complex of Terbium Ions along with Bismuth Nanoparticles for Improved Green Emission

Anomalous electrical properties of poly vinyl alcohol films with Tb3+ ions and copper nanoparticles in different solvents

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Anomalous electrical properties of poly vinyl alcohol films with Tb³⁺ ions and copper nanoparticles in different solvents