Synthesis and Characterization of Nanodispersed Molecular Aggregates of Prussian Blue in Aerosol OT Reverse Micelle

Prussian Blue (PB) nanomolecular aggregates were prepared in a well-characterized, monodispersed biomimicking nanocavities formed by Aerosol OT (AOT) reverse micelle in H2O/AOT/heptane at different ω ([H2O]/[Surfactant]) employing coprecipitation technique. The formed nanomolecular aggregates of PB have been characterized by the UV-visible, Fourier Transformed Infrared (FTIR) spectroscopy as well as by Transmission Electron Microscopy (TEM) and Cyclic Voltammetric methods. Visible and FTIR spectroscopic measurements confirm the formation of PB nano aggregates. Experimental results reveal that the molar extinction coefficient of PB nanomolecular aggregates is different for two different regimes of ω of reverse micelles. TEM measurements show that the size of these reverse micellar entrapped nano aggregrates varied with hydration (ω). Studies on these nano sized particles indicate that Fe is present in a single mixed valence state along the Fe–C–N–Fe skeleton in PB and the half wave potential (E1/2) becomes more positive with increase in the size of the nano aggregates.

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Synthesis of Fluorescent Magnetic and Plasmonic-Hybrid Multifunctional Nanopaticles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1081.161 ◽

2014 ◽

Vol 1081 ◽

pp. 161-164

Author(s):

Xue Mei Li ◽

Zheng Guan ◽

Hong Ling Liu ◽

Jun Hua Wu ◽

Xian Hong Wang ◽

...

Keyword(s):

Ethylene Glycol ◽

Zno Nanoparticles ◽

Poly Ethylene Glycol ◽

Visible Absorption ◽

Transmission Electron ◽

Good Magnetic Property ◽

Uv Visible ◽

Poly Ethylene ◽

Poly Propylene

FeAu/ZnO nanoparticles were successfully synthesized by nanoemulsion process with the use of poly (ethylene glycol)-block-poly (propylene glycol)-block-poly (ethylene glycol) as the surfactant. The characterization of the FeAu/ZnO nanoparticles was performed using X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and UV-visible absorption spectroscopy, showing that the polymer-laced nanoparticles reveal high crystallinity, excellent dispersibility and well defined optical performance. The process of solvent dispersion-collection of FeAu/ZnO nanoparticles indicates that the nanoparticles possess good magnetic property for applications.

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CHARACTERIZATION OF PRUSSIAN BLUE NANOPARTICLES PREPARED BY REVERSE MICELLE AND ELECTROCHEMICAL STUDY OF THEIR ASSEMBLY

Surface Review and Letters ◽

10.1142/s0218625x09013001 ◽

2009 ◽

Vol 16 (04) ◽

pp. 539-544 ◽

Cited By ~ 1

Author(s):

JINGXIA QIU ◽

JIWEI LIU ◽

KAI SUN ◽

YUQING MIAO

Keyword(s):

Prussian Blue ◽

Reverse Micelle ◽

High Efficiency ◽

Electrochemical Study ◽

Homogeneous Distribution ◽

Scanning Electronic Microscopy ◽

Prussian Blue Nanoparticles ◽

Rapid Formation ◽

One Step

Well-dispersed Prussian blue (PB) nanoparticles were successfully prepared by reverse micelle. This method is based on one-step rapid formation in different sizes of nano-pool with water/oil system, which leads to a homogeneous distribution of PB nanoparticles. Scanning electronic microscopy, UV–vis, and Fourier infrared spectra give supportive evidence of PB nanoparticles. Electrochemical study shows that PB nanoparticles are modified onto cysteine-assembled Au electrodes and exhibit high efficiency of electron transfer.

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Synthesis and Characterization of Magnetic Nanoparticles using polyvinylpirrolidone as stabilizer

MRS Advances ◽

10.1557/adv.2017.543 ◽

2017 ◽

Vol 2 (49) ◽

pp. 2769-2773

Author(s):

Morales P. Patricio ◽

Moncayo H. José María ◽

García R. Miguel ◽

Santoyo S. Jaime

Keyword(s):

Magnetic Nanoparticles ◽

X Ray Diffraction ◽

Scanning Microscope ◽

X Ray ◽

Iron Salts ◽

Transmission Electron ◽

Vis Spectroscopy ◽

Coprecipitation Technique ◽

Electron Scanning Microscope

ABSTRACTMagnetic nanoparticles were obtained by chemical coprecipitation technique from aqueous solutions of iron salts, the synthesis was carried out in an alkaline medium, obtaining magnetic nanoparticles of around 2-10 nm in size. The nanoparticles obtained were stabilized with polyvinylpirrolidone (PVP), the particle size was measured by transmission electron microscopy (TEM), the crystal structure of the magnetic nanoparticles obtained was verified by X-ray diffraction (DRX). The chemical composition of the nanoparticles powder was investigated using electron scanning microscope with energy dispersive X-ray spectroscopy (EDX) equipment. Optical properties as absorption was studied by UV-Vis spectroscopy.

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Green Synthesis and Characterization of Silver NPs Using Oyster Mushroom Extract For Antibacterial Efficacy

Journal of Chemistry Environmental Sciences and its Applications ◽

10.15415/jce.2020.71003 ◽

2020 ◽

Vol 7 (1) ◽

Author(s):

Ram Naraian ◽

Abhishek Kumar Bhardwaj Abhishek

Keyword(s):

Green Synthesis ◽

Water Disinfection ◽

Oyster Mushroom ◽

Bactericidal Efficacy ◽

Transmission Electron ◽

Nano Material ◽

Silver Nps ◽

Uv Visible ◽

Synthesis Approach

The present study was aimed to synthesize silver nanoparticles (AgNPs)using the extract of oyster mushroom Pleurotuscitrinopileatus and its use in antibacterial testing. This green synthesis approach of silver NPs is very fast, simple, environmentally friendly and economical. The initial confirmation of silver NPs synthesis was observed with the alteration of the colour of the solution from colourless to wine red. The prepared nano-material was further characterized by UV-Visible spectrophotometer, and transmission electron microscopy (TEM). The TEM revealed particle size of synthesized AgNPsbetween the range of 11-13 nm. The bactericidal efficacy of silver NPstested against Escherichia coli confirmed the lowest 50 µg/L concentration of silver NPs bactericidal. Therefore based the observations of the study silver NPsat the level of its 50 µg/L can be used for the purposes of potential water disinfection, killing of bacteria, disinfection of medical equipments, wound washings, preservation of food stuffs and in hand sanitization.

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Green Synthesis of Selenium Nanoparticle using Capparis decidua fruit extract and its Characterization using Transmission Electron Microscopy And UV- Visible Spectroscopy

Research Journal of Pharmacy and Technology ◽

10.52711/0974-360x.2021.00377 ◽

2021 ◽

pp. 2129-2132

Author(s):

B. Madhumitha ◽

Preetha Santhakumar ◽

M. Jeevitha ◽

S. Rajeshkumar

Keyword(s):

Green Synthesis ◽

Synthesis Method ◽

Visible Spectroscopy ◽

Traditional System ◽

Selenium Nanoparticle ◽

Transmission Electron ◽

Medicinal Properties ◽

Uv Visible ◽

Capparis Decidua

Capparis decidua is used in the traditional system of medicine used due to its medicinal properties. Selenium nanoparticle was synthesized in a simple and rapid way by green synthesis method. Selenium nanoparticle was synthesized using aqueous extract of Capparis decidua fruit. The aim of this present study is to synthesize and to analyse the characterization of selenium nanoparticle synthesized using Capparis decidua. Characterization of selenium nanoparticle was done using ultra-visible spectroscopy and Transmission electron microscope [TEM]. Initially, the wavelength obtained for synthesized selenium nanoparticles ranged from 300nm to 600nm. Then TEM was carried out to find the size and shape of the nanoparticle. The selenium nanoparticle was spherical in shape with size of 320nm. The present study concluded that the selenium nanoparticle prepared using Capparis decidua was ecofriendly and may serve and benefit the society because of its rich medicinal property with less side effects if further research is carried out.

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Preparation of SrS:Ce/ZnO Core-Shell Nanoparticles Using Reverse Micelle Method

MRS Proceedings ◽

10.1557/proc-829-b10.2 ◽

2004 ◽

Vol 829 ◽

Author(s):

Yusuke Kusakari ◽

Shinji Ishizaki ◽

Masakazu Kobayashi

Keyword(s):

Reverse Micelle ◽

Core Shell ◽

Zno Nanoparticle ◽

Shell Nanoparticles ◽

Visible Absorption ◽

Peak Intensity ◽

Transmission Electron ◽

Uv Visible ◽

Core Shell Nanoparticles ◽

Bright Blue

ABSTRACTSrS:Ce nanoparticles were prepared using a reverse micelle method and coated by ZnO. The mono-dispersed nanoparticles whose size was as small as 3nm were observed by transmission electron microscope (TEM) and dynamic light scattering (DLS) method. Optical properties of the core-shell SrS:Ce/ZnO nanoparticle was studied. UV-visible absorption and photoluminescence (PL) properties were measured and compared with those of SrS:Ce and SrS nanoparticles. Bright blue photoluminescence (around 440 nm) was observed from SrS:Ce at a room temperature when nanoparticles were excited using a Hg lamp. The PL peak intensity enhancement was observed after forming the ZnO shell. The optical absorption profile of nanoparticles was associated with the band edge feature of SrS. The coating of the SrS:Ce surface by ZnO has affected the electronic structure of SrS:Ce nanoparticles.

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Synthesis and Characterization of Nanorods in Sucrose Ester Water-in-Oil Microemulsion

Journal of Nanomaterials ◽

10.1155/2011/815709 ◽

2011 ◽

Vol 2011 ◽

pp. 1-6

Author(s):

N. M. Huang

Keyword(s):

Reaction Time ◽

Sucrose Ester ◽

Synthesis And Characterization ◽

Microemulsion System ◽

Visible Absorption ◽

X Ray ◽

Transmission Electron ◽

Uv Visible ◽

Visible Absorption Spectroscopy

We report the synthesis of nanorods in a nonionic sugar-based water-in-oil (w/o) microemulsion system using food grade sucrose ester as biosurfactant. was formed by mixing indium (III) chloride and thioacetamide in the water core of the microemulsion system. The as-prepared yellowish was characterized by X-ray diffractometry (XRD), UV-visible absorption spectroscopy (UV-Vis), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FTIR). Formation of spherical or rod-like nanomaterials was dependent on reaction time. Rod-like , arranged in bundles, was formed only after 2 days of reaction time. Upon longer aging time, a mixture of rod-like and spherical was formed. A plausible formation mechanism of the nanorods in the sucrose ester microemulsion was postulated. The diameter of the nanorods was found to be very small, which is nm with aspect ratio of 20 : 1 (length : diameter).

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A Novel Approach to Synthesis and Characterization of Biocompatible ZnO Nanoparticles

MRS Proceedings ◽

10.1557/proc-1138-ff12-09 ◽

2008 ◽

Vol 1138 ◽

Author(s):

N. Nag ◽

J. Doak ◽

R. K. Gupta ◽

S. Mishra ◽

P. K. Kahol ◽

...

Keyword(s):

Particle Size ◽

Fluorescence Spectroscopy ◽

Zno Nanoparticles ◽

Wide Band ◽

Material Research ◽

Novel Approach ◽

Transmission Electron ◽

Uv Visible ◽

Nanoparticles Suspension

AbstractZinc Oxide nanoparticles (ZnO) being biocompatible and chemically stable have great potential for bio-medical applications that includes anti-bacterial and mold prevention, air ventilation and purification, water purification, self cleaning and photosynthesis, and disease detection. Also ZnO is a wide band gap semiconductor and exhibits piezoelectric and pyroelectric properties, which makes it a perfect candidate for building electrochemically coupled sensors and transducers. With all these unique properties, ZnO has the potential to be very important nanomaterial in material research area. Therefore, research, development, and production of ZnO nanoparticles would make notable contributions to the field of nanotechnology. In this paper we report a novel approach for the fabrication of ZnO nanoparticles suspension in deionized water at room temperature using pulsed laser deposition (PLD) technique. Particle size was controlled by the number of shots of the laser beam used. Characterization of the nanoparticles has been done using UV-Visible spectroscopy, fluorescence spectroscopy, transmission electron microscopy (TEM), and dynamic light scattering (DLS). UV-Visible study confirmed the existence of ZnO nanoparticles showing a peak at around 300 nm which is consistent with the absorption spectra of standard ZnO nanoparticles. Presence of ZnO was reconfirmed by the excitation and emission spectra obtained from fluorescence spectroscopy. The excitation and emission peaks were found at 305 nm and 410 nm respectively, strongly suggesting the characteristic peaks for ZnO nanoparticles. Transmission electron microscope (TEM) photographs established that we have successfully prepared ZnO nanoparticles suspension with particle size ranging from 6 nm to 90 nm.

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

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.156 ◽

2007 ◽

Vol 7 (2) ◽

pp. 708-711 ◽

Cited By ~ 11

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.

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