Synthesis and characterization of Ag/PVA nanocomposite by chemical reduction method

Khanna, Pawan K.; Singh, Narendra Pratap; Charan, Shobhit; Subbarao, V.V.V.S.; Gokhale, R.; Mulik, Uttam

doi:10.1016/j.matchemphys.2005.02.029

Cited by 364 publications

(158 citation statements)

References 29 publications

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“…PVA has been widely used for polymer nanocomposites due to its water solubility making the preparation virtually non-toxic [28] In this study the silver polymer content ratio was maintained at 1 mole of silver to every 1 mole of the PVA monomer .…”

Section: Methodsmentioning

confidence: 99%

“…It was necessary to optimise the preparation method as the ratio between Ag + and BH 4 -in the literature seemed to be unclear and usually BH 4 -was added in great excess [24][25][26][27][28] . There is a competing reduction of water by BH 4 -and it was felt useful to determine the stoichiometry of the reaction; Job's method was used for this purpose.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Silver nanoparticle polymer composite based humidity sensor

Power¹,

Betts²,

Cassidy³

2010

Analyst

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Silver nanoparticles were synthesised by a chemical reduction process in order to produce an aqueous colloidal dispersion. The resulting colloids were then characterised by a combination of UV-Vis spectroscopy, dynamic light scattering, XRay diffraction and transmission electron microscopy and the nanoparticles were found to have an average diameter of 20-22nm. The Ag/polymer nanocomposites were then applied to platinum interdigital electrodes as sensor coatings and the capability of the resulting sensor as a humidity detector investigated. With the application of 1V, a current developed which was found to be directly proportional to humidity levels. The sensor gives a reversible, selective and rapid response which is proportional to levels of humidity within the range of 10% RH to 60% RH. An investigation into the mechanism of the sensor's response was conducted and the response was found to correlate well with a second order Langmuir adsorption model.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Silver nanoparticle polymer composite based humidity sensor

Power¹,

Betts²,

Cassidy³

2010

Analyst

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show abstract

“…A broad surface plasmon resonance band is due to aggregation of AgNPs. The wavelength of the plasmon absorption maximum in a given solvent can be used to indicate particle size [45]. The value of the peak width at half maximum (PWHM) for freshly prepared AgNPs are 67 and 70 nm for AgNPs stirred at 40 min and 2 h 40 min, respectively.…”

Section: Characterizationmentioning

confidence: 99%

Stability and Aggregation Kinetics of Silver Nanoparticles in Water in Oil Microemulsions of Cetyltrimethylammonium Bromide and Triton X-100

Begum¹,

Jahan²,

Mollah³

et al. 2017

J. Sci. Res.

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Water in oil (W/O) microemulsions are simple preparative route for nanoparticles where water droplets dispersed in oil stabilized by surfactant or surfactant and cosurfactant monolayer act as nanoreactors to carry out chemical reactions. In this work, silver nanoparticles (AgNPs) were prepared in W/O microemulsions of cetyltrimethylammonium bromide (CTAB) and triton X-100 (TX-100) by using AgNO 3 and NaBH 4 as a precursor salt and reducing agent, respectively. To prepare microemulsions, CTAB or TX-100, 1-pentanol, cyclohexane and water were mixed with different molar ratio. AgNPs were prepared with different [AgNO 3 ] in microemulsions of CTAB with fixed water to surfactant ratio (W o ). Average particle sizes were determined from dynamic light scattering (DLS) measurements. AgNPs prepared from microemulsions of CTAB were unstable while from TX-100, NPs were stable. Aggregation kinetics was investigated by measuring the absorbance at definite time intervals at the absorption maximum, λ max of AgNPs in different media under pseudo-first-order conditions. The aggregation behavior was studied at different [AgNO 3 ]: [NaBH 4 ] and W o and the parameters were optimized to ensure formation of stable AgNPs without aggregation in microemulsions. This would help tuning the size, stability, and aggregation kinetics of AgNPs by controlling the nature of the surfactant and composition of the microemulsions.

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“…PVA is highly soluble in water and biologically friendly. Its easy processability and high transmittance [5] make it a good matrix of polymer films. It acts both as a reducing agent and as a stabiliser.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Ag/PVA nanocomposites and their potential applicability as dielectric layer in thin film capacitor

Saikia¹,

Gogoi²,

Datta

2013

Journal of Experimental Nanoscience

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Over the past decade, polymer-metal nanocomposites have drawn a great deal of attention due to their extensive application in organic flexible devices. Here, we describe the synthesis and characterisation of silver-polyvinyl alcohol nanocomposite thin films and investigates the possibility of application of these composite films as dielectric layer in efficient capacitors. The material characterisation is done through UV-vis absorption, scanning electron microscopy and atomic force microscope. The dielectric property of the nanocomposite material is investigated with a LCR meter. The different fabricating parameters for generating homogeneous thin films are optimised in this investigation. The composite material thin films exhibit high capacitance density and low dielectric loss and hence they may be suitable ingredients for high capacitance capacitors.

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Synthesis and characterization of Ag/PVA nanocomposite by chemical reduction method

Cited by 364 publications

References 29 publications

Silver nanoparticle polymer composite based humidity sensor

Silver nanoparticle polymer composite based humidity sensor

Stability and Aggregation Kinetics of Silver Nanoparticles in Water in Oil Microemulsions of Cetyltrimethylammonium Bromide and Triton X-100

Fabrication of Ag/PVA nanocomposites and their potential applicability as dielectric layer in thin film capacitor

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