Suryakanta Nayak

National University of Singapore | NUS · Department of Electrical & Computer Engineering

Perovskite barium titanate (BaTiO3) multipods were prepared via high temperature solid state reaction. The crystal structure and morphology of BaTiO 3 particles were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), and scanning probe microscopy (...

Flexible polyurethane (PU)–titania nanocomposites of different compositions are prepared by a melt-mixing technique. Two different sequences of mixing method are adapted to prepare two different sets of composites. All these composites show composition-dependent dielectric properties, and composites with tunable dielectric properties can be obtaine...

Polymer–ceramic composites were prepared using poly(dimethylsiloxane) as base matrix and normal as well as heat-treated titania as fillers. Dielectric and mechanical properties of the composites were measured and found that dielectric constant of the composites was increased dramatically with the addition of filler, whereas resistivity was decrease...

Polymer composites/nanocomposites have various applications. Graphene-based polymer nanocomposites have been of great interest to researchers due to their good electrical and mechanical properties. This chapter briefly describes the properties and applications of various carbon fillers. However, special emphasis has been given to graphene filler an...

Biosynthetic production of vanillin via microbial biotransformation offers a low-cost alternative for manufacturers to meet the consumer demands for natural vanillin. However, identifying the high vanillin-producing microbial strains among multitudinous samples using the current analytical techniques such as liquid chromatography (LC) and mass spec...

Highly ordered spherical titania (TiO 2) and La 3+ /Cu +-doped 10 TiO 2 nanoparticles with particle sizes of ≤∼20 nm are prepared by the sol− 11 gel method using titanium isopropoxide [Ti(O-iPr) 4 ] as the main raw 12 material. The prepared nanoparticles are characterized by X-ray diffraction 13 (XRD), X-ray photoelectron spectroscopy (XPS), UV−vis...

We report on the dual mechanical and proximity sensing effect of soft-matter interdigitated (IDE) capacitor sensors, together with its modelling using finite element (FE) simulation to elucidate the sensing mechanism. The IDE capacitor is based on liquid-phase GaInSn alloy (Galinstan) embedded in a polydimethylsiloxane (PDMS) microfludics channel....

Polymer composites are widely used in recent days for various applications. Carbon-based polymer composites have great attention mainly towards electrical applications. This chapter is focused on different carbon fillers and their polymer-based composites/nanocomposites. The effect of various carbon fillers on different polymer composites has been...

Polyurethane–titania nanocomposites with varying composition are prepared through two different mixing methods. The effect of titania on dielectric, mechanical, and thermal properties is investigated for different composites. A variety of electrical tests (like impedance and dielectric constant) are performed on the resultant composites and it was...

The spherical ferroelectric PbZr0.52Ti0.48O3 (PZT 52/48) nanoparticles are prepared via simple and environment friendly high temperature solid state method. The crystal structure and morphology of these particles are characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), and field emission scanning elect...

Flexible polydimethylsiloxane-titania (PDMS-TiO2) nanocomposites of different composition are prepared using two mixing methods/techniques. In the present study, PDMS elastomer is used as base matrix and titania (TiO2) as ceramic filler. The effect of titania on thermal, electrical, and mechanical properties is investigated for different composites...

Flexible poly(dimethylsiloxane)-BaTiO3 nanocomposites of different compositions are prepared via room temperature mixing for possible sensor and electrical energy-generation applications. The effect of BaTiO3 particles/multipods on electrical properties is extensively studied and found that permittivity of composites is increased significantly w...

The present chapter focuses on the effect of hybrid fillers on the non-linear viscoelastic behaviour of rubber composites and nanocomposites. The viscoelastic behaviour of rubber composites include different properties like cure behavior, rheology, creep, and dynamic mechanical analysis etc. The properties measured under dynamic mechanical analysis...

The present study deals with the development of flexible polymer–ceramic composites with graded dielectric properties. Electro active ceramic material like titania (TiO2), barium titanate (BaTiO3), and doped BaTiO3 were chosen as electro–active ceramic fillers to be added in polydimethylsiloxane (Silicone rubber) matrix. The relative proportion...

Flexible ethylene propylene diene monomer (EPDM)-titania nanocomposites of different compositions were prepared by room temperature mixing using both neat and annealed titania. All these composites showed composition-dependent dielectric and mechanical properties, and composites with controlled dielectric properties could be made through judicial a...

Polymer based nanocapsule was developed using core-cell approach, where the core material was methyl diphenyl diisocyanate and the cell material was urea-formaldehyde. The synthesized capsules of 100 to 800 nm size were incorporated into sol-gel matrix to prepare a final coating for steel protection. This coating was found protecting the steel at t...

Sol-gel technique is one of the simplest techniques to prepare thin films and can provide almost single- or multi-component oxide coating on glass or metals surface. Coatings prepared by this technique have shown excellent chemical stability, oxidation control, and enhanced corrosion resistance for metal substrate. This book focuses on the advantag...

Polymer nanocomposites were prepared via room temperature mixing of polydimethylsiloxane (PDMS) and polyurethane (PU) elastomers as base matrices and titania nanoparticles (both normal and heat treated) as filler material. In case of polyurethane-titania nanocomposites two different mixing methods were used whereas polydimethylsiloxane-titania nano...

Efficient delivery of therapeutics to tumor cells is one of the key issues in cancer therapy. In the present work, we have established a facile and unique chemical strategy for fabrication of highly biocompatible and water-dispersible multifunctional hollow silica nanoparticles (HSNPs). These mesoporous silica nano-particles, having ring-like morph...

Polymer-ceramic nanocomposites with controlled dielectric properties are prepared using poly(dimethylsiloxane) elastomer as base matrix and barium titanate as filler. Barium titanate (BaTiO3) used in this study is prepared by solid state reaction at high temperature. The effect of BaTiO3 nanoparticles on electrical and mechanical properties are ext...

In this study, mesoporous silica encapsulated with magnetic MnFe 2 O 4 nanoparticles is synthesized by a solvothermal method. The synthetic route is feasible and widely applicable. The obtained products have been characterized by an X-ray powder diffraction (XRD) pattern, field emission scanning electron microscopy (FESEM), transmission electron mi...

Corrosion resistance behavior of sol–gel-derived organic–inorganic nanotitania–silica composite coatings was studied. Hybrid sol was prepared from Ti-isopropoxide and N-phenyl-3-aminopropyl trieth-oxy silane. The structure, morphology, and properties of the coating were characterized by Fourier transform infrared spectroscopy (FTIR), scanning elect...

Titania-containing organic-inorganic hybrid sol-gel film was developed to improve the corrosion resistance property of steel. Titania precursor was prepared from titanium-isopropoxide and methyl hydrogen silicone was used as a coupling agent to enhance the adhesion and hydrophobic nature of coating. The kinetics, thermal resistance and morphology o...