International Nano Letters

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

List of Papers (Total 222)

One-step green synthesis and characterization of plant protein-coated mercuric oxide (HgO) nanoparticles: antimicrobial studies

The present study demonstrates the bioreductive green synthesis of nanosized HgO using flower extracts of an ornamental plant Callistemon viminalis. The flower extracts of Callistemon viminalis seem to be environmentally friendly, so this protocol could be used for rapid production of HgO. Till date, there is no report of synthesis of nanoparticles using flower extract of ...

Lanthanum cerate (La2Ce2O7): hydrothermal synthesis, characterization and optical properties

La2Ce2O7 nano-powders were synthesized via a hydrothermal reaction in a deionized water (S 1) and in a 2 M NaOH aqueous solution (S 2) at 180 °C for 48 h. La(NO3)3·H2O and (NH4)2Ce(NO3)6 were used in the stoichiometric 1:1 La:Ce molar ratio as raw materials. The obtained materials were crystallized in a cubic crystal structure with space group. The synthesized materials were ...

Controlled green synthesis of silver nanoparticles by Allium cepa and Musa acuminata with strong antimicrobial activity

A controlled “green synthesis” approach to synthesize silver nanoparticles by Allium cepa and Musa acuminata plant extract has been reported. The effect of different process parameters, such as pH, temperature and time, on synthesis of Ag nanoparticles from plant extracts has been highlighted. The work reports an easy approach to control the kinetics of interaction of metal ions ...

Synthesis of Fe3O4 nanoparticles and its antibacterial application

The Present work outlines the antibacterial activity of Fe3O4 nanoparticles synthesized through chemical combustion method where ferric nitrate is used as precursor material and urea as fuel with the assistant of Tween 80, a non-ionic surfactant. The obtained Fe3O4 nanoparticles were characterized by X-ray diffraction, differential thermal analysis/thermo gravimetric analysis ...

Part III: lithium metasilicate (Li2SiO3)—mild condition hydrothermal synthesis, characterization and optical properties

Li2SiO3 nanopowders were synthesized via a non-stoichiometric 2:3 (S1), 1:3 (S2), 1:4 (S3) and 1:5 (S4) Li/Si molar ratios via hydrothermal reaction for 72 h at 180 °C in an aqua solution using Li2CO3 and H2SiO3 as raw materials. The synthesized materials were characterized by powder X-ray diffraction (PXRD) technique and Fourier transform infrared spectroscopy. PXRD data showed ...

Boehmite (AlOOH) nanostrips and their growth mechanism

Crystalline nanostrips of AlOOH have been prepared at \(240\,^{\circ }\mathrm {C}\) through a fast route. Powder X-ray diffraction studies reveal that the as-prepared nanostrips are highly crystalline in nature and by morphological investigations using FESEM, it was revealed that the strips have average length of 210 nm and width of 60 \(\pm \) 20 nm. A plausible theory is proposed ...

Preparation and characterization of Mn-doped ZnS nanoparticles

Mn-doped ZnS nanoparticles are synthesized by simple and cost effective chemical precipitation method. This diluted magnetic semiconductor is characterized by various techniques such as energy dispersive X-ray analysis, scanning electron microscopy, X-ray diffraction, photoluminescence and UV–Vis spectroscopy. High purity of the sample is confirmed by energy dispersive X-ray ...

Silicon quantum dot solar cell using top-down approach

The current trend of research in the area of third-generation photovoltaics is to increase the efficiency of solar cell device adopting alternate and novel ways such as use of quantum dots to absorb maximum solar spectrum. A new and low-cost top-down approach to fabricate silicon quantum dot solar cell (QDSC) using spin coating of Si QDs embedded in flowable oxide is proposed. Si ...

Green synthesis and characterization of silver nanoparticles by leaf extracts of Cycas circinalis, Ficus amplissima, Commelina benghalensis and Lippia nodiflora

Biosynthesisof nanoparticles is a kind of bottom-up approach where the main reaction occurring is reduction. Since silver nanoparticles (AgNPs) have been used for infection prevention in medical field, it is more relevant to reduce their size using ancient Indian herbal plants. This method is good in anti-microbial efficiency against bacteria, viruses and other microorganisms and ...

Formation of self-ordered porous anodized alumina template for growing tungsten trioxide nanowires

Uniform porous anodized aluminum oxide (AAO) membrane has been synthesized by two-step anodization for fabricating tungsten trioxide (WO3) nanowires. Under assayed conditions, uniform porous structure of alumina (Al2O3) membrane with long range ordered hexagonal arrangements of nanopores was achieved. The self-assembled template possesses pores of internal diameter of 50 nm and ...

Fabrication, characterization, and magnetic behavior of porous ZnFe2O4 hollow microspheres

Porous ZnFe2O4 hollow microspheres with a diameter of about 100–210 nm were successfully prepared by simple template-free hydrothermal route in ethylene glycol (EG) solution. The formation mechanism and properties have been also demonstrated. The structural, morphological, and magnetic properties of ZnFe2O4 hollow microspheres were investigated by means of X-ray powder diffraction ...

FDTD analysis of optical forces on bowtie antennas for high-precision trapping of nanostructures

We theoretically investigate the optical forces generated by a high near-field resolution antenna system through finite difference time domain calculations along with the Maxwell stress tensor method. Our antenna choice is bowtie-shaped nanostructures with small gap regions, exploiting propagating waveguide modes as well as localized surface plasmons. Our analysis shows that the ...

Green synthesis of silver nanoparticles using keratinase obtained from a strain of Bacillus safensis LAU 13

In this study, crude extracellular keratinase obtained from a novel keratin-degrading bacterial strain, Bacillus safensis LAU 13 (GenBank accession No. KJ461434) was used for the synthesis of silver nanoparticles (AgNPs). The particles were characterised by UV–Visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and transmission electron microscopy. The ...

Part I: lithium metasilicate (Li2SiO3)—mild condition hydrothermal synthesis, characterization, and optical properties

Using LiNO3 and SiO2 as raw materials, Li2SiO3 nano-powders were synthesized via a nonstoichiometric 2:3 Li:Si molar ratio hydrothermal reaction at 180 °C for 48, 72, and 96 h in a NaOH aqueous solution system. The synthesized materials were characterized by powder X-ray diffraction technique and Fourier transform infrared spectroscopy. To investigate the effect of the reaction ...

A benign hydrothermal synthesis of nanopencils-like zinc oxide nanoflowers

Synthesis of zinc oxide (ZnO) nanoflowers and nanopencils is normally carried out with the help of structure-directing chemicals and templates. Besides releasing environmentally toxic substances, the use of these chemicals restricts the practical applications of nanostructures. In this paper, we report a typical template-free and environmentally benign synthesis of ZnO nanoflowers ...

Simulation and experimental study of rheological properties of CeO2–water nanofluid

Metal oxide nanoparticles offer great merits over controlling rheological, thermal, chemical and physical properties of solutions. The effectiveness of a nanoparticle to modify the properties of a fluid depends on its diffusive properties with respect to the fluid. In this study, rheological properties of aqueous fluids (i.e. water) were enhanced with the addition of CeO2 ...

Simulating the impact between particles with applications in nanotechnology fields (identification of properties and manipulation)

The aim of this research is to study and simulate the Andrews impact theory and its potential in identifying the properties of soft biological particles and in manipulating these particles at nano scale by means of the atomic force microscope (AFM). The reason for employing the Andrews theory in this research is that this theory is unique in considering the plastic state of soft ...

Grand canonical Monte Carlo simulation of hydrogen physisorption in Li- and K-doped single-walled silicon carbide nanotube

Hydrogen adsorption was investigated in Li- and K-doped single-walled silicon carbide nanotubes (SWSiCNT) by applying the grand canonical Monte Carlo simulation. Our results depict that hydrogen storage increases as a function of pressure at fixed temperature. We considered seven doping sites on the nanotube. The results indicate that except for some doping sites, hydrogen ...

Phyto-reduction of graphene oxide using the aqueous extract of Eichhornia crassipes (Mart.) Solms

The aqueous extract of Eichhornia crassipes was used as reductant to produce graphene from graphene oxide by refluxing method. The complete reduction of graphene oxide was monitored using UV–Vis spectrophotometer. Characterization of graphene was made through FTIR, XRD, and Raman spectroscopy analysis. The stability of graphene was studied by thermal gravimetric analysis and zeta ...

Study in synthesis and characterization of carbon nanotubes decorated by magnetic iron oxide nanoparticles

Magnetic nanoparticles iron oxide with average sizes of 6 nm were synthesized by a chemical coprecipitation method from mixtures of FeCl2·4H2O and FeCl3·6H2O. For preparation, multi-walled carbon nanotubes (MWCNTS) with outer diameter of 50 nm, wall thickness from 1 to 2 nm and length from 500–2,000 nm were used. Characterization of the MWCNT–Fe3O4 by X-ray powder diffraction ...

Magnetic solid phase adsorption, preconcentration and determination of methyl orange in water samples using silica coated magnetic nanoparticles and central composite design

This work evaluates the efficiency of SiO2-coated Fe3O4 magnetic nanoparticles (SMNPs) for adsorption of methyl orange (MO). Adsorption of MO on the studied nanoparticle was developed for removal, preconcentration and spectrophotometric determination of trace amounts of it. To find the optimum adsorption conditions, the influence of pH, dosage of the adsorbent and contact time was ...

A brief review on viscosity of nanofluids

Since the past decade, rapid development in nanotechnology has produced several aspects for the scientists and technologists to look into. Nanofluid is one of the incredible outcomes of such advancement. Nanofluids (colloidal suspensions of metallic and nonmetallic nanoparticles in conventional base fluids) are best known for their remarkable change to enhanced heat transfer ...

Ultrasensitive determination of lead and chromium contamination in well and dam water based on fluorescence quenching of CdS quantum dots

We report lead (Pb2+) and chromium (Cr3+) determination in several water samples obtained from Nahand dam, Karkaj and Azarshahr well, tab and mineral waters to study their contamination in these systems. Determination method is based on the characteristic aggregation and fluorescence quenching of synthesized CdS quantum dots (QDs) at 555 nm by considered cations. Water-soluble and ...

Investigation of size dependency on lattice strain of nanoceria particles synthesised by wet chemical methods

An investigation of the influence of synthesis conditions on the crystallite size, lattice parameter and lattice strain of ceriumdioxide nanoparticles synthesised by coprecipitation and sol–gel processes is presented. The effect of initial precursors, precipitation and calcination temperatures, aging time and molar concentrations of precursor solution on particle size and lattice ...

Histopathology effects of nickel nanoparticles on lungs, liver, and spleen tissues in male mice

Because of the classification of the nickel compounds as carcinogenic substances, there is a need for in vivo tests to nickel nanoparticles (NiNPs) for observing their effects on health experimentally. Spherical NiNPs with 10 nm in diameter and 75 ppm concentration were applied for investigating their toxicities within male albino mice as an in vivo model. We randomly made sham ...