scholarly journals SYNTHESIS OF GOLD NANOPARTICLES THROUGH ULTRASONIC SPRAY PYROLYSIS AND ITS APPLICATION IN PRINTED ELECTRONICS

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Rebeka Rudolf ◽  
Mohammed Shariq ◽  
Valentina Veselinovic ◽  
Tijana Adamovic ◽  
Rajko Bobovnik ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Spray Pyrolysis ◽  
Process Parameters ◽  
Printed Electronics ◽  
Ultrasonic Spray Pyrolysis ◽  
Precursor Solution ◽  
Second Step ◽  
Synthesis Mechanism ◽  
Ultrasonic Spray ◽  
Edx Analyses

This work presents a review of Ultrasonic Spray Pyrolysis (USP) as a technique for the synthesis of gold nanoparticle (AuNPs). The synthesis mechanism involved the preparation of the precursor solution from Au (III) Acetate and the study of the process parameters. AuNPs were characterized with different techniques, such as DLS, UV-vis and SEM-EDX analyses. In the second step, the AuNPs` ink was prepared with the following procedure: (i) Concentration of the AuNPs through Rotavapor, (ii) Filtration of the concentrated AuNPs through Amicon Ultra 15 Centrifugal Filters. Then, it was used directly for printing on an Ag plate. In the final part, we present some information about AuNPs` future applications, which could be in printed electronics with conducted patterns.

Dried plum-like ZnO assemblies consisted of ZnO nanoparticles synthesized by ultrasonic spray pyrolysis

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040005 ◽  
Author(s):  
Congzhi Zhang ◽  
Tao Han ◽  
Wei Wang ◽  
Jin Zhang
Keyword(s):  
Electron Microscopy ◽  
Spray Pyrolysis ◽  
Field Emission ◽  
Zno Nanoparticles ◽  
Ultrasonic Spray Pyrolysis ◽  
Precursor Solution ◽  
Spray Pyrolysis Method ◽  
X Ray Diffraction ◽  
Ultrasonic Spray ◽  
Transmission Electron

Dried plum-like ZnO assemblies consisting ZnO nanoparticles were synthesized by an ultrasonic spray pyrolysis method (USP). ZnO assemblies were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS) and field-emission transmission electron microscopy (TEM). The results show the size of ZnO assemblies is in the range of 300–870 nm, and that of ZnO nanoparticles is from 33 nm to 39 nm. The microstructure and size of ZnO assemblies were successfully controlled by the concentration of the precursor solution.

Cytotoxicity of Gold Nanoparticles Prepared by Ultrasonic Spray Pyrolysis

2010 ◽  
Vol 26 (5) ◽  
pp. 595-612 ◽  
Author(s):  
R. Rudolf ◽  
B. Friedrich ◽  
S. Stopić ◽  
I. Anžel ◽  
S. Tomić ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Ultrasonic Spray

Formation mechanisms for gold nanoparticles in a redesigned Ultrasonic Spray Pyrolysis

2017 ◽  
Vol 28 (3) ◽  
pp. 876-883 ◽  
Author(s):  
Peter Majerič ◽  
Darja Jenko ◽  
Bernd Friedrich ◽  
Rebeka Rudolf
Keyword(s):  
Gold Nanoparticles ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Formation Mechanisms ◽  
Ultrasonic Spray

scholarly journals The Effect of Stabilisation Agents on the Immunomodulatory Properties of Gold Nanoparticles Obtained by Ultrasonic Spray Pyrolysis

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4121 ◽  
Author(s):  
Marina Bekić ◽  
Sergej Tomić ◽  
Rebeka Rudolf ◽  
Marijana Milanović ◽  
Dragana Vučević ◽  
...  
Keyword(s):  
Immune Response ◽  
Gold Nanoparticles ◽  
Spray Pyrolysis ◽  
Inflammatory Cytokines ◽  
Mononuclear Cells ◽  
Biological Fluids ◽  
Ultrasonic Spray Pyrolysis ◽  
Drug Carriers ◽  
Ultrasonic Spray ◽  
Pro Inflammatory Cytokines

Gold nanoparticles (GNPs) have been investigated extensively as drug carriers in tumour immunotherapy in combination with photothermal therapy. For this purpose, GNPs should be stabilised in biological fluids. The goal of this study was to examine how stabilisation agents influence cytotoxicity and immune response in vitro. Spherical GNPs, 20 nm in size, were prepared by ultrasonic spray pyrolysis (USP). Three types of stabilising agents were used: sodium citrate (SC), polyvinyl-pyrrolidone (PVP), and poly-ethylene glycol (PEG). Pristine, non-stabilised GNPs were used as a control. The culture models were mouse L929 cells, B16F10 melanoma cells and human peripheral blood mononuclear cells (PBMNCs), obtained from healthy donors. Control SC- and PEG-GNPs were non-cytotoxic at concentrations (range 1–100 µg/mL), in contrast to PVP-GNPs, which were cytotoxic at higher concentrations. Control GNPs inhibited the production of IFN-ϒ slightly, and augmented the production of IL-10 by PHA-stimulated PBMNC cultures. PEG-GNPs inhibited the production of pro-inflammatory cytokines (IL-1, IL-6, IL-8, TNF-α) and Th1-related cytokines (IFN-ϒ and IL-12p70), and increased the production of Th2 cytokines (IL-4 and IL-5). SC-PEG inhibited the production of IL-8 and IL-17A. In contrast, PVP-GNPs stimulated the production of pro-inflammatory cytokines, Th1 cytokines, and IL-17A, but also IL-10. When uptake of GNPs by monocytes/macrophages in PBMNC cultures was analysed, the ingestion of PEG- GNPs was significantly lower compared to SC- and PVP-GNPs. In conclusion, stabilisation agents modulate biocompatibility and immune response significantly, so their adequate choice for preparation of GNPs is an important factor when considering the use of GNPs for application in vivo.

The roles of ammonia and ammonium bicarbonate in the preparation of nickel particles from nickel chloride

2000 ◽  
Vol 15 (10) ◽  
pp. 2157-2166 ◽  
Author(s):  
B. Xia ◽  
I. W. Lenggoro ◽  
K. Okuyama
Keyword(s):  
Aqueous Solution ◽  
Spray Pyrolysis ◽  
Reaction Pathway ◽  
Ultrasonic Spray Pyrolysis ◽  
Precursor Solution ◽  
Nickel Chloride ◽  
Ammonium Bicarbonate ◽  
Solution Chemistry ◽  
Ultrasonic Spray ◽  
Nickel Particles

The roles of NH3 · H2O and NH4HCO3 in the preparation of Ni particles from NiCl2 · 6H2O aqueous solution by ultrasonic spray pyrolysis were investigated. The results showed that both ammonia and ammonium bicarbonate had a remarkable influence on the solution chemistry and the resulting particles, and could significantly modify the reaction pathway. After the addition of these additives to the precursor solution, intermediate NiO was formed initially, followed by reduction to metallic Ni in the presence of a reductive gas. H2 is a powerful reducing agent; however, metallic Ni could also be obtained in the absence of H2 in the carrier gas. In the latter case, it was shown that NH3 was primarily responsible for Ni formation. A description of the mechanisms and processes of Ni formation during spray pyrolysis is proposed.

Application of Gold(III) Acetate as a New Precursor for the Synthesis of Gold Nanoparticles in PEG Through Ultrasonic Spray Pyrolysis

2017 ◽  
Vol 28 (3) ◽  
pp. 1647-1665 ◽  
Author(s):  
Mohammed Shariq ◽  
Peter Majerič ◽  
Bernd Friedrich ◽  
Bojan Budic ◽  
Darja Jenko ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Ultrasonic Spray

scholarly journals Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO2 Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1011
Author(s):  
Jekaterina Spiridonova ◽  
Arvo Mere ◽  
Malle Krunks ◽  
Merilin Rosenberg ◽  
Anne Kahru ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Spray Pyrolysis ◽  
Flow Reactor ◽  
Ultrasonic Spray Pyrolysis ◽  
Precursor Solution ◽  
Molar Ratio ◽  
Tio2 Thin Films ◽  
Ultrasonic Spray ◽  
Great Possibility

TiO2 thin films, modified by acetylacetone (AcacH) in solution, were deposited on glass substrate by ultrasonic spray pyrolysis and tested for photocatalytic activity in a multi-section continuous flow reactor by degradation of acetone and acetaldehyde under ultraviolet and visible light. The increase in molar ratio of AcacH in respect of titanium (IV) isopropoxide (TTIP) from 1:5 to 1:8 modified the electronic structure of the films, favoring enhanced photocatalytic activity. The photocatalytic activity was enhanced approximately twofold on the film with molar ratio 1:8 under both irradiations; the film completely oxidized 10 ppm of acetone and acetaldehyde. The photocatalytic efficacy of TiO2 films in oxidation of air pollutants was three times higher compared to the industrial glass Pilkington ActivTM. Moreover, all the synthesized films indicate antibacterial efficiency against E. coli of over 99% under ultraviolet. TiO2 film, with TTIP:AcacH molar ratio 1:8 having great possibility for its commercial use as a material for indoor air purification.

scholarly journals In SituSynthesis and Deposition of Gold Nanoparticles with Different Morphologies on Glass and ITO Substrate by Ultrasonic Spray Pyrolysis

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
María de la Garza ◽  
Israel López ◽  
Idalia Gómez
Keyword(s):  
Gold Nanoparticles ◽  
Spray Pyrolysis ◽  
Indium Tin Oxide ◽  
Average Particle Size ◽  
Ultrasonic Spray Pyrolysis ◽  
Average Particle ◽  
Particle Sizes ◽  
Ultrasonic Spray ◽  
Ito Film

Gold nanoparticles were synthesized and depositedin situby ultrasonic spray pyrolysis on glass and indium tin oxide (ITO) substrates. This technique led to the formation of gold nanoparticles with different morphologies without the use of any capping agent. The gold nanoparticles deposited on glass substrate were obtained as nanospheres with an average particle size of 30 nm with some agglomerates; however, the nanoparticles deposited on ITO substrate were obtained with different morphologies, such as triangular nanoprisms, nanorods, nanocubes, and nanorhombus, with particle sizes between 40 and 100 nm. The ITO substrate influenced the morphology of the gold nanoparticles obtained due to changes in the deposition temperature, which also change the crystalline structure of the ITO film on the substrate.

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