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

Abstract

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.

Study of electrical and dielectric properties as an effect of nanoparticle concentration and UV irradiation of PVA-Ag nanocomposites

“…The alteration in the polymeric parameters after embedding of metal nanostructures provides options for their utilization in a wide range of applications like charge storage capacitors, electronic chips, conductive inks, sensors, switching devices, vapour analysers etc. [6][7][8]. An effective re-usable 'dip catalyst'-emanated from Ag nanostructures embedded in PVA, is illustrated that can immediately begin and end a chemical reaction just by inserting and taking it out respectively [9].…”

Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles

“…PVA has good chelation properties and may act as both a reducing agent and a stabilizer for metallic nanoparticles [4]. For these reasons, it has been extensively used as a matrix for nanoparticles of noble metals such as Au [5][6][7], Ag [7][8][9][10][11][12][13][14][15][16], Cu [8], Pt [17]. PVA-noble metal nanocomposites are especially interesting for optical applications [5][6][7][8][9][10][11], but they have been also employed for sensing [12], as thin film capacitors [13] and for catalysis [17].…”

“…For these reasons, it has been extensively used as a matrix for nanoparticles of noble metals such as Au [5][6][7], Ag [7][8][9][10][11][12][13][14][15][16], Cu [8], Pt [17]. PVA-noble metal nanocomposites are especially interesting for optical applications [5][6][7][8][9][10][11], but they have been also employed for sensing [12], as thin film capacitors [13] and for catalysis [17]. In addition, PVA-Ag nanocomposites exhibit antimicrobial properties due to the potent activity of silver nanoparticles against gram-negative and gram-positive bacteria [11,15,16].…”

Tuned high dielectric constant, low dielectric loss tangent with positive and negative values for PPy/MWCNTs/TiO2/Al2O3/n-Si

“…This structure has a high dielectric constant and low dielectric loss emphasizing the appearance of negative dielectric constant and dielectric loss tangent at both high and low frequencies, in contrast to what is preserved as the appearance of a negative value only at high or low frequencies [29,30]. The main aim of this study is to fine-tune the dielectric constant and dielectric loss tangent so that high-energy storage such as supercapacitors and electronic devices as diodes can be manufactured [31][32][33][34][35]. The structure of Polypyrrole-MWCNTs composite/TiO 2 /Al 2 O 3 /n-Si has been fully characterized by X-ray diffraction pattern, FTIR, Raman spectroscopy, and scanning electron microscope.…”