scholarly journals Structural Characterization of Emeraldine-Salt Polyaniline/Gold Nanoparticles Complexes

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
E. A. Sanches ◽  
J. C. Soares ◽  
R. M. Iost ◽  
V. S. Marangoni ◽  
G. Trovati ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Electrostatic Interactions ◽  
Sodium Citrate ◽  
X Ray Diffraction ◽  
Emeraldine Salt ◽  
Salt Form ◽  
Au Nps ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Polyamidoamine Dendrimers

Gold nanoparticles (Au NPs) stabilized with polyamidoamine dendrimers (Au-PAMAM) or sodium citrate (Au-CITRATE) were synthesized and complexed with polyaniline emeraldine-salt form (ES-PANI). The complexes were characterized using structural and morphological techniques, including X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Zeta Potential analyses, and Fourier-Transformed Infrared spectroscopy (FTIR). When the Au-CITRATE NPs are added to the polymeric solution, the formation of a precipitate is clearly observed. The precipitate exhibited a different morphology from that found for ES-PANI and Au-CITRATE NPs, suggesting the formation of ES-PANI coating over the surface of Au-CITRATE NPs. On the other hand, when the Au-PAMAM NPs are incorporated into the ES-PANI solution, none interaction was observed, probably due to the repulsive electrostatic interactions, being the organization of the ES-PANI chains unaffected by the presence of the Au-PAMAM NPs.

Sunlight-Driving Formation and Characterization of Size-Controlled Gold Nanoparticles

2007 ◽  
Vol 7 (2) ◽  
pp. 708-711 ◽  
Author(s):  
Yonglan Luo
Keyword(s):  
Gold Nanoparticles ◽  
Sodium Citrate ◽  
Noble Metal Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron Microcopy ◽  
Uv Visible ◽  
Size Controlled

Exposing a sodium citrate-HAuCl4 aqueous solution to sunlight results in the formation of size-controlled, citrate-capped gold nanoparticles. The gold nanoparticles were characterized by UV-visible, transmission electron microscopy (TEM), scanning electron microcopy (SEM), and X-ray diffraction (XRD) spectroscopic methods. It provides a general methodologyfor the economic, convenient, mild preparation of citrate-capped noble metal nanoparticles.

scholarly journals Green Synthesis and Characterization of Gold Nanoparticles from Malus viridisand Capsicum annuum as AnticancerAgent

2021 ◽  
Vol 2114 (1) ◽  
pp. 012088
Author(s):  
Sh.H. Abdulwahed ◽  
M. F. A. Alias ◽  
Z. Y. MohammedHasan
Keyword(s):  
Gold Nanoparticles ◽  
Capsicum Annuum ◽  
Cancer Cell Line ◽  
Chloroauric Acid ◽  
X Ray Diffraction ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Atomic Force ◽  
Cancerous Cells ◽  
Mcf 7

Abstract Gold nanoparticles (AuNPs) were synthesied by eco friendly method (green method) through the reduction of aqueous chloroauric acid (HAuCl4.4H2O) solution using apple and pepper (Malusviridis and capsicum annuum) peels extract as a reducing and stabilizing agent. AuNPs were characterized using various instrumental techniques including energy dispersive spectroscopy (EDS), Fourier transformed infrared spectroscopy (FTIR), X-ray diffraction (XRD), Atomic force microscope (AFM), field emission scanning electron microscopy (FESEM) ultraviolet-visible spectroscopy (UV-Vis), and Zeta-Potential. The synthesized AuNPs was used against breast cancer cell line MCF-7 to compare their biological effect as anticancer agent. Results showed that the AuNPs formed with both plants had a physical charastaristics differ from each other, even in their effects on cancerous cells, where the inhibition rate of AuNPs synthesized using apple (Malusviridis) peel extrac has larger values than Capsicum annuum. The AuNPs formed from synthesized using both plants showed an acceptable stability.

Preparation and Characterization of Silver and Gold Nanoparticles and Study Influence on Physical Properties of PVA/PVP nanocomposites

2017 ◽  
Vol 13 (1) ◽  
pp. 4628-4639
Author(s):  
A. M. Abdelghany ◽  
Mahrous. S. Meikhail ◽  
A. A. ALdhabi
Keyword(s):  
Gold Nanoparticles ◽  
Spherical Shape ◽  
X Ray Diffraction ◽  
Ag Nps ◽  
Au Nps ◽  
Silver And Gold Nanoparticles ◽  
Plant Extraction ◽  
Chenopodium Murale ◽  
Transmission Electron

Gold nanoparticles (Au NPs) and Silver nanoparticles (Ag NPs) ware prepared by “green” synthesis extraction using the Chenopodium murale leaf extract, the obtained (Ag NPs and Au NPs) were investigated by UV/Vis. absorption spectroscopy, transmission electron microscopy, Zetasizer, XRD. The plant extraction leads to produce nanoparticles of spherical shape with size range from 4 to 22 nm. Polyvinyl alcohol (PVA) and polyvinyl Pyrolidone (PVP) blend with mixed silver and gold nanoparticles were prepared by casting method. Amorphous feather of doping polymers blend was characterized by X-ray diffraction. Significant changes within the polymer matrix were monitored from infrared spectroscopy which indicates the interaction between polymer blend and mixed nanoparticles. Both indirect and direct optical energy gaps are calculated and discussed.

Preparation and characterization of polyaniline–cadmium sulfide nanocomposite for gas sensor application

2017 ◽  
Vol 31 (26) ◽  
pp. 1750234 ◽  
Author(s):  
Selma M. H. Al-Jawad ◽  
Sewench N. Rafic ◽  
Mustafa M. Muhsen
Keyword(s):  
Cadmium Sulfide ◽  
Oxidative Polymerization ◽  
Sol Gel ◽  
High Resistivity ◽  
Emeraldine Salt ◽  
Electrical Measurements ◽  
Salt Form ◽  
Operation Temperature ◽  
Cds Nanocomposites

Polyaniline (PANI) was prepared by chemical oxidative polymerization of aniline monomers as emeraldine salt form. By the same method, polyaniline–cadmium sulfide nanocomposites were synthesized in the presence of different percentages (10–50 wt.%) of cadmium sulfide (CdS) which was prepared by using sol–gel method. The optical band gap was decrease with increasing of CdS concentration, that is obtained from UV-VIS measurements. From SEM and AFM, there is uniform distribution for cadmium sulfide nanoparticles in the PANI matrix. The electrical measurements of nanocomposites exhibit the effect of crystallite size and the high resistivity of CdS on the resistivity of nanocomposites. Emeraldine salt PANI, CdS and PANI–CdS nanocomposites were investigated as gas sensors. From this investigation, the sensitivity of PANI–CdS for NO2 gas increase with the increasing of operation temperature and the optimum sensitivity was obtained at 200[Formula: see text]C. The sensitivity of nanocomposites at best temperature (200[Formula: see text]C) was increased and faster response time with the increasing of CdS contents.

Synthesis and Characterization of Silver Nanoparticles Anchored on Montmorillonite via Chemical Reduction

2016 ◽  
Vol 11 ◽  
pp. 30-37 ◽  
Author(s):  
Danica Louise S. Bonga ◽  
Ma. Manna Farrel B. Pinto ◽  
Mary Fatima T. Tayad
Keyword(s):  
Ag Nanoparticles ◽  
Sodium Citrate ◽  
Chemical Reduction ◽  
Average Crystallite Size ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Clay Particles ◽  
X Ray ◽  
Mean Size

Montmorillonite clay particles were decorated with silver (Ag) nanoparticles by chemical reduction of Ag nitrate with sodium citrate. X-ray diffraction (XRD) and energy dispersive X-ray spectrometry (EDS) confirmed the presence of metallic Ag on the surface of montmorillonite. The average crystallite size of the Ag nanoparticles obtained from the broadening of the 111 Ag peak ranged at 13-16 nm. On the other hand, the apparent particle sizes obtained from the SEM images were about 79-128 nm, suggesting that the nanoparticles are polycrystalline and possibly agglomerated. The increase in the concentration of reducing agent produced smaller Ag nanoparticles with narrower size distribution. The antibacterial test showed that the Ag nanoparticles, with mean size of 79 nm, adsorbed on montmorillonite were able to inhibit the growth of Staphylococcus aureus (S. aureus) with an antimicrobial index of 0.4.

Preparation of Cellulose Acetate Ultra-Fine Fibers Containing Quasi-Spherical Gold Nanoparticles by Electrospinning Method

2011 ◽  
Vol 391-392 ◽  
pp. 400-403
Author(s):  
Dong Mei Zhao ◽  
Li Guo Sun ◽  
Li Li Lv ◽  
Jian Li
Keyword(s):  
Electron Microscopy ◽  
Gold Nanoparticles ◽  
Cellulose Acetate ◽  
Trisodium Citrate ◽  
X Ray Diffraction ◽  
Au Nps ◽  
Transmission Electron ◽  
Electrospinning Method ◽  
Before And After ◽  
Spherical Gold Nanoparticles

Quasi-spherical gold nanoparticles(Au NPs) prepared by trisodium citrate reduction of HAuCl4were dispersed into cellulose acetate(CA) ultra-fine fibers by electrospinning. The optical properties of Au NPs before and after electrospinning were measured by UV-vis spectrometer. The morphology and distribution of Au NPs in CA ultra-fine fibers were observed by transmission electron microscopy (TEM). The morphology and diameter of Au NPs/CA fibers were studied by scanning electron microscopy (SEM). The crystallinity change of CA fiber before and after adding Au NPs was characterized by X-ray diffraction (XRD).

Preparation and Characterization of Gold Nanoparticles in the Presence of Citrate and Soybean Seed Extract in an Acidic Conditions

Drug Research ◽  
2017 ◽  
Vol 67 (05) ◽  
pp. 266-270 ◽  
Author(s):  
Ebrahim Izadi ◽  
Ali Rasooli ◽  
Abolfazl Akbarzadeh ◽  
Soodabeh Davaran
Keyword(s):  
Particle Size ◽  
Gold Nanoparticles ◽  
Size Distribution ◽  
Average Particle Size ◽  
Soybean Seed ◽  
Average Particle ◽  
X Ray Diffraction ◽  
Soybean Extract ◽  
Average Size

AbstractThrough the present study, an eco-friendly method was used to synthesize the gold nanoparticles (GNPs) by using the sodium citrate and extract of the soybean seed as reducing the agents at PH 3. X-Ray diffraction (XRD) method was used to evaluate the crystal structure of as-synthesized NPs and it’s revealed that this method leads to well crystallized GNPs. In order to determine the particle size and their distribution, field emission scanning microscopy (FE-SEM) and dynamic light scattering (DLS) were used. The results showed that, the average particle size distribution of synthesized GNPs in solutions containing of the soybean extract and 1% citrate at PH 3 is about 109.6 and 140.9 nm, respectively. Also, we find that the average size of GNPs is 40 and 33 nm from solutions of citrate and soybean extract, respectively. It was concluded that using the extract of soybean seeds as reducing agent can lead to GNPs with small size and narrow size distribution.

scholarly journals Synthesis and Characterization of a New Aluminum-Doped Bismuth Subcarbonate

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 466
Author(s):  
Loisangela Álvarez ◽  
Blanca Rojas de Gascue ◽  
Rolando J. Tremont ◽  
Edgar Márquez ◽  
Euclides J. Velazco
Keyword(s):  
Infrared Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Energy Dispersive ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Characterization Methods ◽  
X Ray ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Anionic Part

A new compound, Bi2O2CO3:Al, was synthesized by the coprecipitation method. The characterization was done by X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), electronic scanning microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The characterization methods allowed to identify the Bi2O2CO3:Al compound, such as the Al-doped Bi2O2CO3 by XRD, the anionic part (CO32−) by FTIR, and the presence of aluminum in the compound by XPS and EDX. It was confirmed to have a nanostructure like a nanosheet and a microstructure that resembles a type sponge by SEM.

Fabrication and Characterization of Optically Transparent PVDF Films Embedded with Gold Nanoparticles

2021 ◽  
Author(s):  
Caleb Duff ◽  
Alan Rowland ◽  
Alexander Long ◽  
Yanwen Wu
Keyword(s):  
Gold Nanoparticles ◽  
Polyvinylidene Fluoride ◽  
Optoelectronic Devices ◽  
Initial Step ◽  
X Ray Diffraction ◽  
Poling Field ◽  
X Ray ◽  
Piezoelectric Polymer ◽  
Fabrication And Characterization

Abstract Polyvinylidene fluoride is a piezoelectric polymer that can be cast into transparent thin films. New properties can be introduced by embedding nanoparticles in this polymer, making it an excellent platform for flexible and tunable electronic and optoelectronic devices. We develop a recipe for embedding plasmonic gold nanoparticles into these films while maintaining their transparency as an initial step to activate optical response in the film. We characterize films made under different poling conditions with and without nanoparticle inclusions using X-ray diffraction. We find that the inclusion of gold nanoparticles screens the poling field and has a sizable effect on the phase of the produced films.

Green synthesis and characterization of gold nanoparticles embedded into magnetic carbon nanocages and their highly efficient degradation of methylene blue

RSC Advances ◽  
2016 ◽  
Vol 6 (34) ◽  
pp. 28774-28780 ◽  
Author(s):  
Wei Zuo ◽  
Gaosong Chen ◽  
Fengjuan Chen ◽  
Siliang Li ◽  
Baodui Wang
Keyword(s):  
Methylene Blue ◽  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Synthesis And Characterization ◽  
Au Nps ◽  
Selective Degradation ◽  
Highly Efficient ◽  
Magnetic Carbon

We reported the Au NPs/MCNSs nanohybrids as the catalysts for the highly efficient and selective degradation of methylene blue.

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