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Flexible electronics in mobile environments such as those encountered in wearable devices also require energy sources. Ideally the energy source, typically batteries and supercapacitors, should also be flexible and have the same form factor as the electronic system. This has given rise to a new paradigm of flexible energy storage devices.
This paper presented a method of growing metallic nanowires by using electron beam technology under scanning electron microscopy (SEM). The metallic nanoparticles were dispersed evenly on Indium-Tin Oxide (ITO) by the spin coater. The ITO sample was experimentally prepared by the spin coating technique. The electron beam was focused on a metallic nano particle inside SEM, which were dispersed on the...
Near-infrared (NIR) responsive nanoparticles (NPs) like gold nanorods (GNRs) are important in biomedical fields because of their transparency for biological tissues. Although GNRs are sought after as contrast agents for theranostics in cancer studies, capping ligands like cetyl trimethyl ammonium bromide (CTAB) used for the GNR synthesis are toxic for biological tissues. This work aimed to develop...
Silver@titanium dioxide (Ag@TiO2) core-shell nanostructures and Ag surface doped TiO2 particles (TiO2@Ag) have been designed and synthesized by sol-gel and hydrothermal methods under mild conditions. These two types of Ag-TiO2 nanocomposites were characterized in terms of their properties. Specifically, the photocatalytic performance and antibacterial behavior of such nanocomposites have been investigated...
We present a method of determining the mass of a single picogram particle by observing its Brownian motion near the bottom of a droplet of water. The motion of the particle caused by thermal fluctuation is restricted within a narrow region because of gravity, and the vertical displacement of the particle from the bottom of the droplet depends on its mass. Since the particle is trapped inside the droplet,...
Zinc oxide (ZnO) and Titanium dioxide (TiO2) nanoparticles are some of the widely used nanoparticles (NPs) in commercial industry. Thus the chances for the particles to get run off to the aquatic environment and to there by affect the aquatic life are very high. The present study evaluates the short term toxicity of ZnO NPs and TiO2 NPs on Chlorella pyrenoidosa, which is a fresh water algae and on...
Niclosamide (NIC), an anthelminthic drug exhibits poor oral bioavailability due to hydrophobic nature which limits its in vivo application. In recent times, NIC has been reported to exhibit anticancer activity against wide range of tumors. Solid Lipid Nanoparticles (SLNs) of NIC were prepared using solid lipid Glyceryl monostearate, charge modifier stearyl amine, soya lecithin, and tween 80 by emulsion...
The nonlinear response of zinc oxide and zinc oxide-gold hybrid colloidal nanostructures to 532 nm nanosecond pulses was investigated. The z-scan technique was used to measure the nonlinear absorption of zinc oxide, zinc-oxide: gold hybrids and mixed colloids of zinc-oxide and gold. Despite similar zinc oxide concentrations, the colloids containing gold nanoparticles displayed stronger intensity dependent...
In the present investigation, silver nanoparticles (SNP) were synthesised using Dipteracanthus prostratus (Poir.) Nees, leaves extract and were characterised using UV-Visible spectroscopy, High resolution transmission electron microscopy (HR-TEM), and X-ray diffraction. The UV-Vis analysis of nanoparticles shows absorption peak at 412 nm. HR-TEM results showed them to be spherical - ellipsoidal in...
Commercially available micron-sized Ag flake particles and submicron-sized Ag particles were used to make Ag paste. The Ag paste was used to connect Si dies to Ni-Ag plated Cu substrates to achieve die-bonding joint for high temperature application. The contact between die and Ag paste was affected by the loading pressure, and was realized with only 0.2 MPa pressure. And the shear strength depended...
The present investigation reports a facile method for the biosynthesis of gold nanoparticles from the rind extract of Garcinia mangostana, a medicinal plant which acts as a reducing agent. It was observed that the aqueous gold ions, when exposed to the rind extract of G.mangostana were reduced in the solution, thereby leading to the formation of gold nanoparticles (GMREGNP). The structural characterization...
Cassia fistula L. hoarding multi perspective components that are still being used not only as medicines but also in synthesizing silver nanoparticles that are reliably beneficial for its microbial growth inhibition nature. The microbial resistant products seems to have gained much importance in many of the emerging fields. Active biocomposite fabricated relating biodegradable Polylactide (PLA) and...
Titanium dioxide-supported silver nanoparticles was synthesized by a facile method and studied as a sorbents for elemental mercury (Hg°). The concentration of deposited silver nanoparticles was in the range of 0.1 – 5.0% weight of titanium dioxide powder. XRD and TEM results confirmed that silver nanoparticles with a diameter size ranging from 2–5 nm were successfully deposited on the surface of titanium...
In the liquid phase synthesis of metallic nanoparticles by electroless deposition, the morphology of product is strongly dependent on numerous synthesis conditions; for example, the type or quantity of solvent, precursor, reductant and dispersant species. In this work, the influence of the surface area of precursor on the size distribution of synthesized nanoparticles was investigated using a kinetic...
We present the characterization of nanocomposite materials made from functionalized magnetite nanoparticles and HEUR amphiphilic polymers in the gel and dry states. The hydrophobically modified particles are mainly associated with the two hydrophobic end-groups of the polymer. One part of this study focuses on the polymeric state and dynamics, that are governed by the polymeric network through amphiphilic...
Nowadays, effective cancer treatment is still one of the most challenging missions in the scientific community. A primary limitation to most conventional anticancer drugs is their adverse uptake by normal tissues, fast metabolism and lack of tumour cell targeting property. One way to overcome these disadvantages is the application of nanoparticles as the carriers of widely known therapeutic substances...
Layer-by-layer (LbL) assembly is a prevalent approach for coating material with functional thin films. In this work, we report on high-efficient antibacterial nanofilms constructed by direct assembly of sodium citrate with synthetic N-halamine precursor containing quaternary ammonium salt (QAS) moieties, and deposited on the iron oxide nanoparticles (IO NPs) (size 20∼30 nm) using the LbL method. The...
Two types of gold-supported TiO2 catalysts (anatase and rutile) were prepared using a deposition precipitation method, and their photocatalytic activity towards CO2 reduction was tested in the gas phase using H2O as an electron donor and a xenon lamp as the energy sources. The crystal structures were verified using a scanning electron microscope (SEM) and the loaded Au nano-particles (NPs) had no...
In this study, dual pulsed laser ablation was used to prepare composite nanoparticles. Formation of composite nanoparticles was attempted by controlling the amount of time delay between the laser ablation processes, which was accomplished by imposing time delay on the pulse arrival at two different target materials. By monitoring the emission spectra of the laser plume, the relation between the time...
To improve the image contrast, the so-called contrast agents (CAs) are often used in magnetic resonance image (MRI). CAs are generally paramagnetic or superparamagnetic nanoparticle suspensions. To increase the applicability of low field nuclear magnetic resonance (LFNMR) or LFMRI system, CAs also have been introduced to enhance the image contrast. In this work, we synthesized the γ-Fe2O3/Au core/shell...
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