International Nano Letters

http://link.springer.com/journal/40089

List of Papers (Total 223)

Synthesis and characterization of new biocompatible copolymer: chitosan-graft-polyaniline

Polyaniline as a conductive polymer and chitosan as a natural polymer have been reacted with formaldehyde as grafting agent and potassium persulfate as an initiator. The effect of using specific primer, different ratio of monomers and the solubility of synthesized copolymer has been studied and analyzed. Characterization of this new copolymer were occurred by Fourier transform ...

Synthesis of hierarchically porous silica film with controllable surface wettability

A kind of water–oil separation material was fabricated by depositing the mesoporous microspheres (MS) on filter paper. MS had been prepared via surfactant-template method and modified by octyltriethoxysilane. The diameter of microspheres was in the range of 200–800 nm. There were uniform mesopores in the microspheres, and the surface area of microspheres was more than 1,000 m2 g−1. ...

Preparation and characterization of azithromycin nanodrug using solvent/antisolvent method

Nanoparticles of azithromycin are prepared using solvent/antisolvent precipitation method. The solubility of drug in water and the oral bioavailability are increased with decreasing particle size. The effect of type and concentration of surfactant and feed drug concentration are evaluated on the precipitated particle size. The nano-azithromycin in range 200–400 nm is obtained by ...

Broadband optical absorption measurement of silicon nanowires for photovoltaic solar cell applications

The broadband optical absorption properties of silicon nanowire films fabricated by electroless metal deposition technique followed by HF/Fe(NO3)3 solution-based chemical etching at room temperature on p-type silicon substrates have been measured and found absorption higher than that of the solid thin films of equivalent thickness. The observed behavior is effectively explained by ...

Synthesis of mesoporous silica nanoparticles by means of a hydrogel

Synthesis and application of mesoporous silicate nanoparticles are important areas of research in many fields such as drug delivery, medicine, catalysis, and optic. The method of synthesis strongly affects the properties of a product. In this work, the mesoporous silica nanoparticles were synthesized by means of a hydrogel. The obtained product was characterized by X-ray ...

Synthesis of quinoline derivatives from the reaction of aminobenzophenones and acetylenic esters in the presence of SnO2 nanoparticles

Nano SnO2 catalyzes the two-component reaction of 2-aminobenzophenones with acetylenic mono or diesters under mild conditions to afford quinoline derivatives in high yields. Nano SnO2 shows high activity when used as surface catalyst for the synthesis of quinoline derivatives.

Surface plasmon resonance of metal nanostructures as a complementary technique for microscopic size measurement

Physical principals and the relations between Surface Plasmon Resonance (SPR) spectra and geometrical properties of metal nanostructures specially silver and gold were reported. Applying SPR technique enable us to investigate the accuracy of some simple equations for investigating geometrical properties of metal nanostructures based on their plasmonic spectrum. Geometrical ...

Biodegradation behaviors and water adsorption of poly(vinyl alcohol)/starch/carboxymethyl cellulose/clay nanocomposites

The focus of this work is to study the effect of sodium montmorillonite (MMT-Na) clay content on the rate and extent of enzymatic hydrolysis polyvinyl alcohol (PVA)/starch (S)/carboxymethyl cellulose (CMC) blends using enzyme cellulase. The rate of glucose production from each nanocomposite substrates was most rapid for the substrate without MMT-Na and decreased with the addition ...

Environmentally benign Friedel-Crafts benzylation over nano-TiO2/SO42-

During the past decade, much attention has been paid to the replacement of homogeneous catalysts by solid acid catalysts. Friedel-Crafts benzylation of toluene with benzyl chloride (BC) in liquid phase was carried out over highly active, nano-crystalline sulfated titania systems. These catalysts were prepared using the sol gel method. Modification was done by loading 3% of ...

Facile synthesis and characterization of polypyrrole-multiwalled carbon nanotubes by in situ oxidative polymerization

Polypyrrole-multiwall carbon nanotube (PPy-MWCNT) nanocomposites were chemically synthesized via in situ oxidative polymerization of pyrrole. Ammonium peroxydisulfate and p-toluenesulfonic acid were used as an initiator and surfactant dopant, respectively. The molar ratio of monomer unit to initiator and dopant was 1:1:1, and the percentage of MWCNT in PPy varied from 1 to 10 wt.%. ...

Structural, morphological and optical properties of sol gel processed CdZnO nanostructured films: effect of precursor solvents

Cadmium-doped zinc oxide (CZO) has been the potential candidate for the fabrication of low-cost transparent conductors having applications in energy conversion devices such as thin-film solar cells and light-emitting diodes. In this work, the effect of different precursor solvents on the structural, morphological, and optical properties of sol?gel spin-coated CZO films was ...

Local structure modification and phase transformation of TiO2 nanoparticles initiated by oxygen defects, grain size, and annealing temperature

TiO2 nanoparticles acquire complete crystalline anatase phase on thermal treatment of as-prepared anatase TiO2 at 450°C. Anatase-rutile mixed phase and rutile phase are achieved by annealing anatase TiO2 at 700°C and 950°C respectively. The anatase-rutile mixed phase TiO2 has 87.8% rutile phase. This signifies that the percentage of rutile fraction in mixed phase can be tailored by ...

Molecular dynamics simulation of the specific heat capacity of water-Cu nanofluids

This paper presents molecular dynamics (MD) modeling for calculating the specific heat of nanofluids containing copper nanoparticles. The Cu nanoparticles with 2-nm diameter were considered to be dispersed in water as base liquid. The MD modeling procedure presented and implemented to calculate the specific heat of nanofluids with volume fractions of 2 to 10%. Obtained results show ...

Influence of Zn2+ doping on the structural and surface morphological properties of nanocrystalline Ni-Cu spinel ferrite

Ni0.8-xCu0.2Zn x Fe2O4 (x = 0.0 ≤ 0.6 with steps of 0.2) ferrite nanophase was achieved by sol–gel auto-combustion technique. The as-prepared samples were thermally characterized by thermogravimetry/differential thermal analysis to obtain firing temperature of the materials. The X-ray diffraction pattern indicates the formation of a single-phase cubic spinel structure and shows ...

Application of a facile solid-state process to synthesize the CdO spherical nanoparticles

Mechanochemical process has attracted a worldwide interest in the synthesis of nanomaterials since reactions can be run in solid state without any organic solvent. Therefore, this method is an environmentally friendly reaction. Cadmium oxide is a category of the practical semiconductor metal oxides, which is widely applied in various scientific and industrial fields because of its ...

Trace level ammonia sensing by SWCNTs (network/film) based resistive sensor using a simple approach in sensor development and design

Highly stable and sensitive detection of trace level (approximately 1 ppm) of NH3 gas at room temperature is demonstrated for single wall carbon nanotube (SWCNT)-based resistive sensor. The sensor device was comprised of two planer Au electrodes deposited on carbon nanotubes (CNTs) by thermal evaporation method followed by patterning with photolithography process. For the growth of ...

Strong localization of the charge carriers in CdSe nanostructural films

Cadmium selenide nanoparticle films were deposited on usual glass substrate by chemical bath deposition method. Temperature dependence of dc conductivity of the present samples was studied. In the nanocrystalline materials due to small size of grains and confined charge carriers, the electronic states near the Fermi level are localized. When states are localized, the conduction ...

Optimization of preparation of chitosan-coated iron oxide nanoparticles for biomedical applications by chemometrics approaches

Functionalized magnetic nanoparticles are used in several biomedical applications, such as drug delivery, magnetic cell separation, and magnetic resonance imaging. Size and surface properties of iron oxide nanoparticles are the two important factors which could dramatically affect the nanoparticle efficiency as well as their stability. In this study, the chemometrics approach was ...

Acacia nilotica (Babool) leaf extract mediated size-controlled rapid synthesis of gold nanoparticles and study of its catalytic activity

The leaf extract of Acacia nilotica (Babool) is rich in different types of plant secondary metabolites such as flavanoids, tannins, triterpenoids, saponines, etc. We have demonstrated the use of the leaf extract for the synthesis of gold nanoparticles in water at room temperature under very mild conditions. The synthesis of the gold nanoparticles was complete in several minutes, ...

Structural, optical, and electrical properties of thioglycolic acid-capped CdTe quantum dots thin films

Water-soluble cadmium telluride (CdTe) quantum dots (QDs) were synthesized using thioglycolic acid as capping agent; this reaction was carried out at pH = 10.2 and refluxed at 100°C for 18 h. The CdTe QDs prepared at various reflux times from 1 to 18 h were coated on the glass substrates to obtain thin films of the CdTe QDs with the same thickness. The CdTe thin films were ...

Emerging applications of nanoparticles for lung cancer diagnosis and therapy

Lung cancer is by far the leading cause of cancer-related mortality worldwide, most of them being active tobacco smokers. Non small cell lung cancer accounts for around 85% to 90% of deaths, whereas the rest is contributed by small cell lung cancer. The extreme lethality of lung cancer arises due to lack of suitable diagnostic procedures for early detection of lung cancer and ...

Morphology dependence on anions in hydrothermal synthesis of Co3O4

One-dimensional (1D) nanostructures of Co3O4 were synthesized via a mild hydrothermal route. The results of XRD, IR, and TEM revealed a phase transformation was accompanied by the replacement of NO3− with CO32− throughout the hydrothermal process. The symmetric types and amount of NO3− and CO32− intercalated between the brucite layers played an important role in the formation of ...

Structural phase transformation and hysteresis behavior of Cu-Zn ferrites

A series of Cu1-xZn x Fe2O4 ferrite (with x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6) compositions were synthesized using the standard solid-state reaction technique. X-ray diffraction was used to study the structure of the above investigated samples. The theoretical and experimental lattice parameters (ath and aexp) were calculated for each composition. A significant decrease in ...

Sol–gel synthesis, characterization, and optical properties of Gd3+-doped CdO sub-micron materials

Highly crystalline Gd3+-doped cadmium oxide micro-structure was synthesized by calcining the obtained precursor of a sol–gel reaction. The reaction was carried out with cadmium nitrate (Cd(NO3)2·4H2O), gadolinium oxide, and ethylene glycol (C2H6O2) reactants without any additives at 80°C for 2 h. The resulting gel was calcined at 900°C with increasing temperature rate of 15°C/min ...

Hydrothermal synthesis and characterization of straw bundle-like lithium sodium disilicate (silinaite) micro-rods

Highly mono-shaped straw bundle-like silinaite micro-rods have been synthesized using an aqueous mixture of silicic acid, lithium sulfate, and sodium hydroxide under hydrothermal conditions at 180°C. The synthesized materials were characterized by powder X-ray diffraction technique and Fourier transform infrared spectroscopy. The morphologies of the synthesized materials were ...