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Search results for: GOLD AND SILVER NANOPARTICLES
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Enhanced photocatalytic, electrochemical and photoelectrochemical properties of TiO2 nanotubes arrays modified with Cu, AgCu and Bi nanoparticles obtained via radiolytic reduction
PublicationTiO2 nanotubes arrays (NTs), obtained via electrochemical anodization of Ti foil, were modified with monometallic (Cu, Bi) and bimetallic (AgCu) nanoparticles. Different amounts of metals’ precursors were deposited on the surface of NTs by the spin-coating technique, and the reduction of metals was performed via gamma radiolysis. Surface modification of titania was studied by EDS and XPS analysis. The results show that AgCu nanoparticles...
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UV-Vis-Induced Degradation of Phenol over Magnetic Photocatalysts Modified with Pt, Pd, Cu and Au Nanoparticles
PublicationThe combination of TiO2 photocatalyst and magnetic oxide nanoparticles enhances the separation and recoverable properties of nanosized TiO2 photocatalyst. Metal-modified (Me = Pd, Au, Pt, Cu) TiO2/SiO2@Fe3O4 nanocomposites were prepared by an ultrasonic-assisted sol-gel method. All prepared samples were characterized by X-ray powder diffraction (XRD) analysis, Brunauer-Emmett-Teller (BET) method, X-ray photoelectron spectroscopy...
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Formaldehyde detection with chemical gas sensors based on WO3 nanowires decorated with metal nanoparticles under dark conditions and UV light irradiation
PublicationWe report results of formaldehyde gas (CH2O) detection under dark conditions and UV light irradiation with pristine tungsten trioxide nanowires (WO3 NWs) and metal nanoparticles decorated WO3 NWs gas sensing layers. The resistive layers were deposited by one step aerosol assisted chemical vapor deposition (AACVD) on commercial alumina substrates with 10-pair interdigitated platinum electrodes. The elaborated gas sensors, based...
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Potentiometric and AM1d studies of a new class of Tr-podands–silver(I) complexes
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Modifications of Hydroxyapatite by Gallium and Silver Ions—Physicochemical Characterization, Cytotoxicity and Antibacterial Evaluation
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Lattice dynamics and elasticity of silver thiogallate (AgGaS2) from ab initio calculations
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Influence of Preparation Procedure on Physicochemical and Antibacterial Properties of Titanate Nanotubes Modified with Silver
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Properties of ultrafine-grained Mg-based composites modified by addition of silver and hydroxyapatite
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Optical properties of a dielectric slab front-loaded with a grating of plasmonic silver nanowires
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“Silver Economy” Models in the European Union in the Comparative Approach: An Attempt to Introduce Discussion
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Silver filled single-wall carbon nanotubes—synthesis, structural and electronic properties
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Silver-doped TiO2 prepared by microemulsion method: surface properties, bio- and photoactivity
PublicationOtrzymane fotokatalizatory typu Ag-TiO2 wykazywały wyższą aktywność w reakcjach fotodegradacji fenolu w obecności promieniowania z zakresu UV oraz światła widzialnego w porównaniu z komercyjnym katalizatorem Degussa P25 oraz czystym niedomieszkowanym TiO2, otrzymanym w mikroemulsji woda-AOT-cykloheksan. Powierzchnia właściwa (BET) otrzymanych katalizatorów wynosiła od 100 do 160 m2/g. Na podstawie analizy rentgenowskiej (XRD) stwierdzono,...
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Electrochemical activity of composite material poly(3,4-ethylenedioxythiophene) modified by silver hexacyanoferrate
PublicationW pracy przedstawiono sposób slektrochemicznj syntezy materiału składającego się z polimeru przewodzącego poli(3,4-etylenodioksytiofen) (pEDOT) i nieorganicznej sieci typu redox heksacyjanożelazianu srebra (Aghcf). Materiał otrzymano na drodze dwuetapowej. Etap pierwszy polega na galwanostatycznej redukcji srebra na elektrodzie z węgla szklistego. Etap drugi to roztwarzanie srebra z jednoczesną polimeryzacją monomeru. Otrzymany...
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Photostability pf Cy3 and Cy5-labeled DNA in the presence of metallic silver particles
PublicationZbadano wpływ cząstek metalicznego srebra na fotostabilność oligomerów DNA kowalencyjnie związanych z Cy3 lub Cy5. Zbliżenie fluoroforów do cząstek srebra powodowało zwiększenie intensywności fluorescencji i pojawienie się frakcji emisji bardziej odpornej na wybielanie.
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Attachment of silica and alumina nanoparticles as studied by QCM
PublicationNanocząstki są wykorzystywane w mikroelektronice do produkcji bardzo płaskich i gładkich powierzchni. Proces produkcji taki materiałów nazywany jest planaryzacją chemiczno-mechaniczną (CMP). Poniewąż nanocząstki na skutek interakcji z produkowanym materiałem specjalistyczntycznym mogą wiązać do jego powierzchni, na skutek czego powodując zanieczyszczenia. Ze względu na wpływ zanieczyszczeń na wydajność i miarodajność produkowanego...
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Phthalocyanine-Grafted Titania Nanoparticles for Photodegradation of Ibuprofen
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Titanium Dioxide Nanoparticles: Prospects and Applications in Medicine
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Effects triggered by platinum nanoparticles on primary keratinocytes
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Dynamics and stability of icosahedral Fe–Pt nanoparticles
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Roxithromycin-loaded lipid nanoparticles for follicular targeting
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On the Possibility of Improving the Oxidation Resistance of High-Chromium Ferritic Stainless Steel Using Reactive Element Oxide Nanoparticles
PublicationHigh-chromium ferritic steels are current the only viable candidates for cheap interconnect materials for application in high-temperature solid oxide fuel and electrolyzer cells (HT-SOFCs/SOECs). The durability and operating characteristics of interconnects manufactured using these materials may be improved significantly by applying a protective-conducting MoCo2O4 coating and depositing an intermediate layer consisting of nanoparticles...
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Role of size scale of ZnO nanoparticles and microparticles on toxicity toward bacteria and osteoblast cancer cells
PublicationThe specific role of size scale, surface capping, and aspect ratio of zinc oxide (ZnO) particles on toxicity toward prokaryotic and eukaryotic cells was investigated. ZnO nano and microparticles of controlled size and mor- phology were synthesized by wet chemical methods. Cytotoxicity toward mammalian cells was studied using a human osteoblast cancer cell line and antibacterial activity using Gram-negative bacteria (Escherichia...
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The spontaneous electron emission and rotational predissociation lifetimes of the diatomic silver anion
Open Research DataThe process of a two-channel decay of the diatomic silver anion (Ag2-), namely the spontaneous electron ejection giving Ag2 + e- and the dissociation leading to Ag- + Ag is theoretically studied. The ground state potential energy curves (PECs) of the neutral silver dimer and anionic silver diatomic molecule are calculated using the single reference...
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Unwinding Au+···Au+ Bonded Filaments in Ligand-Supported Gold(I) Polymer under Pressure
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Development of biocompatible iron oxide-silicon oxide core-shell nanoparticles as subcellular delivery platform for glucosamine-6-phosphate synthase inhibitors
PublicationIn order to develop the preparation of iron oxide-silica coreshell nanoparticles (CSNPs), thesis deeply explores the cetyltrimethylammonium (CTA+) directed silica coating methods of the oleic-acid capped iron oxide nanoparticles (OA-IONPs) initialized under near-neutral pH conditions. It is demonstrated that the initial alkaline hydrolysis of ethyl acetate in the presence of CTA+ and OA-IONPs induces an unusual ligand exchange...
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Synthesis of CoFe2O4 Nanoparticles: The Effect of Ionic Strength, Concentration, and Precursor Type on Morphology and Magnetic Properties
PublicationThe present study highlights the effect of metal precursor types (SO4 2¯, Cl¯, and NO3¯), their concentration, and the influence of ionic strength of reaction environment on the morphology, surface, and magnetic properties of CoFe2O4 particles. The magnetic nanoparticles were obtained by chemical coprecipitation in alkaline medium at increasing metal concentration in the range of 0.0425 mol·dm-3 to 0.17 mol·dm-3 and calcination...
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Electrodes Based on a Titanium Dioxide Nanotube–Spherical Silver Nanoparticle Composite for Sensing of Proteins
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Electrochemical activity and characterization of hybrid material consisted of poly(3,4- ethylenedioxythiophene) and silver hexacyanocobaltate
PublicationPrac przedstawiono charakterystykę elektrochemiczną oraz powierzchniową materiału hybrydowego składającego się z polimeru przewodzącego, poli(3,4-etylenodioksytiofenu) oraz nieorganicznej sieci typu redoks, heksacyjanokobaltanu srebra. Materiał scharakteryzowano technikami jak AFM, SEM. Skład materiału oznaczono za pomocą mikroanalizy rentgenowskiej EDX. Analiza potwierdziła obecność sieci nieorganicznej w materiale. Proporcja...
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Polysaccharide films modified by compounds of natural origin and silver having potential medical applications
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Comparison of resonance optical scattering of plane waves by infinite gratings of silver cylinders and strips
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photocatalytic activity of silver doped tio2 in vis and uv light, prepared by microemulsion method
PublicationDitlenek tytanu otrzymany w wyniku hydrolizy izopropanolanu tytanu oraz komercyjny katalizator TiO-6 (Catalysis Society of Japan, rutyl, wielkość cząstek 15 nm) zmodyfikowano srebrem metodą mikroemulsyjną. Aktywność fotokatalityczna otrzymanych nanokompozytów Ag-TiO2 została zbadana dla fotodegradacji fenolu pod działaniem promieniowania ultrafioletowego oraz widzialnego. Zaobserwowano, że na efektywność fotorozkładu modelowego...
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Effects of metallic silver particles on resonance energy transfer between fluorophores bound to DNA.
PublicationZbadano wpływ filmów wysepek metalicznego srebra na rezonansowe przekazywanie energii między fluoroforami związanymi z DNA. Donorem i akceptorem były odpowiednio 4´,6 diamidyno-2-fenylindon i jodek propydyny. Zmierzone dla tego układu czasy zaniku i widma fluorescencji pokazują, że sąsiedztwo cząstek srebra dramatycznie zwiększa promień Forstera, a tym samym i przekazywanie energii w znakowanym DNA.
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Two-photon induced fluorescence of Cy5-DNA in buffer solution and on silver island film
PublicationOpisano fluorescencję barwnika CY5 połączonego z DNA w roztworze buforowym na wysepkach srebrowych.
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Comparison of XPS spectra of Ag3d for silver nanostructures and bulk material
Open Research DataAg nanostructures were prepared on borosilicate glass (Corning 1737F) and Si substrates. In both cases, the substrateswere cleaned with acetylacetone and then rinsed in ethanol. Thin Ag films (2 and 6 nm thickness) were deposited using a tabletop dc magnetron sputtering coater (EM SCD 500, Leica) in pure Ar plasma (argon, Air Products 99.999%). The...
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Laser-Assisted Synthesis and Oxygen Generation of Nickel Nanoparticles
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Luminescent properties of ZrO2:Tb nanoparticles for applications in neuroscience
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Influence of hydrothermal synthesis parameters on the properties of hydroxyapatite nanoparticles
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Grinding-induced functionalization of carbon-encapsulated iron nanoparticles
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Addition of azomethine ylides to carbon-encapsulated iron nanoparticles
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Magnetization enhancement in magnetite nanoparticles capped with alginic acid
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A bibliometric analysis of the recent achievements in pulmonary safety of nanoparticles
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TiO2-Modified Magnetic Nanoparticles (Fe3O4) with Antibacterial Properties
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Efficient Luminescence from CsPbBr3 Nanoparticles Embedded in Cs4PbBr6
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The Influence of the Parameters of a Gold Nanoparticle Deposition Method on Titanium Dioxide Nanotubes, Their Electrochemical Response, and Protein Adsorption
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UV Light-Modulated Fluctuation-Enhanced Gas Sensing by Layers of Graphene Flakes/TiO2 Nanoparticles
PublicationWe present experimental results of fluctuation-enhanced gas sensing by low-cost resistive sensors made of a mixture of graphene flakes and TiO2 nanoparticles. Both components are photocatalytic and activated by UV light. Two UV LEDs of different wavelengths (362 and 394 nm) were applied to modulate the gas sensing of the layers. Resistance noise was recorded at low frequencies, between 8 Hz and 10 kHz. The sensors’ response was...
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Quality Control of Bacterial Extracellular Vesicles with Total Protein Content Assay, Nanoparticles Tracking Analysis, and Capillary Electrophoresis
PublicationExtracellular vesicles (EVs) were isolated from Pectobacterium zantedeschiae culturing media using direct ultracentrifugation (UC), iodixanol cushion ultracentrifugation (ICUC), and iodixanol density gradient ultracentrifugation (IDGUC) techniques. The isolates were characterized with total protein content assay (bicinchoninic acid assay, BCA), nanoparticles tracking analysis (NTA), and capillary electrophoresis (CE). A satisfactory...
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Corncob-supported calcium oxide nanoparticles from hen eggshells for cadmium (Cd-II) removal from aqueous solutions; Synthesis and characterization
PublicationThis study investigated the efficient removal of cadmium ions from aqueous solutions using calcium oxide nanoparticles (CaO NPs) synthesized from waste hen eggshells using a Sol-gel method and supported on corncob bio-adsorbent. The synthesized CaO NPs were characterized using FT-IR, XRD, specific surface area, and TGA. Batch adsorption experiments were conducted to examine the influence of process parameters such as adsorbent...
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Cu( II ) ions removal from wastewater using starch nanoparticles ( SNPs ): An Eco‐sustainable approach
PublicationThe complex structured starch particles were reduced to the nanoscale size range through hydrolysis utilizing low concentration acid assisted with ultrasound irradiation. The synthesized starch nanoparticles (SNPs) were characterized by TEM, FTIR, and XRD techniques. The synthesized SNPs possessed surface activated entities, as many cationic functional groups were confirmed through the FTIR spectrum. Also, these SNPs were effectively...
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Free-standing TiO2 nanotubes decorated with spherical nickel nanoparticles as a cost-efficient electrocatalyst for oxygen evolution reaction
PublicationHere, we report significant activity towards the oxygen evolution reaction (OER) of spherical nickel nanoparticles (NPs) electrodeposited onto free-standing TiO2 nanotubes (TNT) via cyclic voltammetry. It has been shown that simple manipulation of processing parameters, including scan rate and number of cycles, allows for formation of the NPs in various diameters and amounts. The polarization data with respect to transmission electron...
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Highly Visible-Light-Photoactive Heterojunction Based on TiO2 Nanotubes Decorated by Pt Nanoparticles and Bi2S3 Quantum Dots
PublicationA heterojunction with excellent visible light response and stability based on titanium dioxide nanotubes (TiO2 NTs), bismuth sulfide quantum dots (Bi2S3 QDs), and platinum nanoparticles (Pt NPs) is proposed. Both Pt NPs (3.0 ± 0.2 nm) and Bi2S3 QDs (3.50 ± 0.20 nm) are well distributed on the (i) top parts, (ii) inner walls, and (iii) outer walls of the TiO2 NTs. Visible-light-induced photoreaction was initialized by excitation...