This paper describes the internal structure of Au−Pd nanoparticles exhibiting newly discovered three-layer core/shell morphology, which is composed an evenly alloyed inner core, Au-rich intermediate layer, and a Pd-rich outer shell. By exploitation spatially resolved imaging spectroscopic diffraction modes transmission electron microscopy (TEM), insights were gained on composition each one observed three layers, indicating significant extent intimate alloy among monometallic elements.

In this work, we synthesized ZnO nanorods by a wet chemical process. By varying different parameters of the synthesis process like precursor concentration, solvent used, surfactant, temperature, and reaction time, were able to control aspect ratio (l/d) sharpness factor (Sf = h/b) rods. Rods with an ∼20 10 repeatedly obtained characterized from scanning electron microscopy. High-resolution transmission microscopy dark field analysis revealed that grow as single crystal along c axis [0001]....

Background and aim: Bimetallic silver/gold nanosystems are expected to significantly improve therapeutic efficacy compared their monometallic counterparts by maintaining the general biocompatibility of gold nanoparticles (AuNPs) while, at same time, decreasing relatively high toxicity silver (AgNPs) toward healthy human cells. Thus, aim this research was establish a highly reproducible one-pot green synthesis colloidal AuNPs bimetallic Ag/Au alloy (NPs; Ag/AuNPs) using starch as reducing...

To evaluate, using statistical methods, the usefulness of binaural multiple frequency auditory steady state responses (MF SSRs) for objective, frequency-specific audiometry in a large sample hearing-impaired children and normal-hearing subjects.The MF SSRs were recorded 43 (86 ears) 40 young adults (80 ears). Simultaneous carrier tones (0.5, 1, 2, 4 kHz) modulated amplitude at different rates (77 to 105 Hz) presented binaurally (TDH 49 earphones) variable intensities (110 20 dB SPL). For...

Gold/Palladium nanoparticles were fabricated by inert-gas condensation on a sputtering reactor. With this method, controlling both the atmosphere chamber and magnetron power, it was possible to produce with high degree of monodispersity in size. The structure size Au/Pd determined mass spectroscopy, confirmed atomic force microscopy electron transmission measurements. chemical composition analyzed X-ray microanalysis. From these measurements we that technique are able particles 1, 3, 5 nm...

The procedure employed for the sensitization of mesoporous photoanodes affects strongly final performance sensitized devices, especially when semiconductor quantum dots and rods are used as sensitizers. In this work effect three different sensitizing methods in cell was analyzed. TiO2 films were with CdS QDs grown by successive ionic layer adsorption reaction, SILAR, CdSe deposited electrophoretic pipetting methods. Several configurations sensitizers combinations tested. 4% photoconversion...

This work presents the design of substrates for Surface Enhanced Raman Scattering (SERS) using star-like gold nanoparticles which were synthesized a wet chemical method and functionalized with 1-dodecanethiol. molecule allowed us to obtain spacing ∼2.6 nm among stars, promoted generation SERS hotspots single detection. The deposited on silicon or coated by Langmuir–Blodgett permitted zeptomole detection Rhodamine B (total moles per laser spot area). enhancement factor (EF) achieved this...

In this work, bismuth nanoparticles were synthesized when a precursor, sodium bismuthate, was exposed to an electron beam at room temperature in transmission microscope (TEM). The irradiation effects investigated situ using selected-area diffraction, high-resolution microscopy and x-ray energy dispersive spectroscopy. After the irradiation, with rhombohedral structure diameter of 6 nm observed. average particle size increased time. electron-induced reduction is attributed desorption oxygen...

A multilayered semiconductor sensitizer structure composed of three differently sized CdSe quantum rods (QRs), labeled as Q530, Q575, Q590, were prepared and deposited on the surface mesoporous TiO2 nanoparticles by electrophoretic deposition (EPD) for photovoltaic applications. By varying arrangement layers well time EPD, photoconversion efficiency was improved from 2.0% with single layer QRs (TiO2/Q590/ZnS) to 2.9% multilayers (TiO2/Q590Q575/ZnS). The optimal EPD shorter structures. effect...

Abstract The synthesis, structural and optical characterization, application of superparamagnetic water‐dispersed Fe 3 O 4 ‐Au core‐shell nanoparticles for surface enhanced Raman scattering (SERS) is reported. structure the was determined by scanning transmission electron microscopy (STEM) high‐resolution (HRTEM). STEM images reveal an average diameter 120 nm a high degree roughness. nanoparticles, which display properties due to core material, exhibit visible plasmon resonance (SPR) peaked...

In this contribution, a totally ecofriendly synthesis of silver nanoparticles from aqueous dissolution polysaccharides is reported. The was performed using dissolutions nitrate (AgNO 3 ) and carboxymethyl-cellulose (CMC) as both reducing stabilization agent different AgNO : CMC weight ratios. Resultant yellowish to reddish dispersions were characterized by means transmission electron microscopy their related techniques, such bright field Z-contrast imaging diffraction, well...

Abstract A magnetic hybrid material (MHM), consisting of iron‐oxide nanoparticles (˜4 nm) embedded in sodium carboxymethyl cellulose (Na‐CMC) matrix was synthesized. The MHM synthesis process performed two stages. First, a precursor (Fe(II)‐CMC) synthesized from aqueous solutions: Na‐CMC solution and FeCl 2 solution. In the second stage, treated with H O under alkaline conditions to obtain MHM. results obtained X‐ray diffraction show that crystalline structure iron oxide into corresponds...

Gold nanoparticles (AuNPs), multi-branched gold (MBGNs), and silica-coated MBGNs (MBGNs-silica) were studied for rhodamine B (RB) α-glucose Raman detection at low concentration in water.

This work reports the luminescence, morphology and synthesis of ZnO quantum dots using a simple wet chemical method different concentrations Triethanolamine (TEA) as surfactant.Those nanoparticles emitted strong blue emission band centered at 429 nm when they are dispersed in hexane.Spherical with sizes ranging from 3 to 7 were obtained for 0 0.7 ml. TEA, whereas mixture oval-like was observed above 1.1 ml TEA.It also possible control values gap depending on content TEA.Based high yield 81%...