scholarly journals Influence of Shell Parameters on Optical Properties of Spherical Metallic Core-Oxide Shell Nanoparticles

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Victor K. Pustovalov ◽  
Liudmila G. Astafyeva
Keyword(s):  
Metallic Nanoparticles ◽  
Oxide Shell ◽  
Spectral Interval ◽  
Metal Core ◽  
Metal Shell ◽  
Shell Nanoparticles ◽  
Wide Range ◽  
Potential Applications ◽  
Efficiency Factors ◽  
Core Shell Nanoparticles

Different metal homogeneous nanoparticles have been extensively studied in recent years due to their wide range of potential applications. It is very interesting to investigate core-shell nanoparticles with oxide shell from core metal. The formation of oxide shell on metallic nanoparticles can be achieved by different chemical and physical methods including also natural oxidation of pure metallic nanoparticles in gaseous or liquid media, containing oxygen components (air, water, etc.). We numerically calculated efficiency factors of absorptionKabs, scatteringKsca, and extinctionKextof radiation with wavelengthλin the spectral interval 150–1000 nm by spherical homogeneous metallic and two-layered (metal core – oxide metal shell) nanoparticles: Al, Al-Al2O3and Zn, Zn-ZnO with core radii in the range 5–50 nm and shell thickness 5 nm. Analysis of presented results has been carried out.

scholarly journals Synthesis and Advanced Characterization of Polymer-Protein Core-Shell Nanoparticles

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 730
Author(s):  
Erik Sarnello ◽  
Tao Li
Keyword(s):  
Particle Size ◽  
Small Angle ◽  
Core Shell ◽  
Assembly Process ◽  
Shell Nanoparticles ◽  
X Ray ◽  
X Ray Scattering ◽  
Wide Range ◽  
Core Shell Nanoparticles ◽  
Ray Scattering

Enzyme immobilization techniques are widely researched due to their wide range of applications. Polymer–protein core–shell nanoparticles (CSNPs) have emerged as a promising technique for enzyme/protein immobilization via a self-assembly process. Based on the desired application, different sizes and distribution of the polymer–protein CSNPs may be required. This work systematically studies the assembly process of poly(4-vinyl pyridine) and bovine serum albumin CSNPs. Average particle size was controlled by varying the concentrations of each reagent. Particle size and size distributions were monitored by dynamic light scattering, ultra-small-angle X-ray scattering, small-angle X-ray scattering and transmission electron microscopy. Results showed a wide range of CSNPs could be assembled ranging from an average radius as small as 52.3 nm, to particles above 1 µm by adjusting reagent concentrations. In situ X-ray scattering techniques monitored particle assembly as a function of time showing the initial particle growth followed by a decrease in particle size as they reach equilibrium. The results outline a general strategy that can be applied to other CSNP systems to better control particle size and distribution for various applications.

scholarly journals Advanced Microfluidic Technologies for Lipid Nano-Microsystems from Synthesis to Biological Application

Pharmaceutics ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 141
Author(s):  
Bruna Carvalho ◽  
Bruno Ceccato ◽  
Mariano Michelon ◽  
Sang Han ◽  
Lucimara de la Torre
Keyword(s):  
Lipid Nanoparticles ◽  
Future Trends ◽  
Biological Applications ◽  
Biological Application ◽  
Shell Nanoparticles ◽  
Cellular Environment ◽  
Wide Range ◽  
Core Shell Nanoparticles ◽  
New Strategies ◽  
Lipid Structures

Microfluidics is an emerging technology that can be employed as a powerful tool for designing lipid nano-microsized structures for biological applications. Those lipid structures can be used as carrying vehicles for a wide range of drugs and genetic materials. Microfluidic technology also allows the design of sustainable processes with less financial demand, while it can be scaled up using parallelization to increase production. From this perspective, this article reviews the recent advances in the synthesis of lipid-based nanostructures through microfluidics (liposomes, lipoplexes, lipid nanoparticles, core-shell nanoparticles, and biomimetic nanovesicles). Besides that, this review describes the recent microfluidic approaches to produce lipid micro-sized structures as giant unilamellar vesicles. New strategies are also described for the controlled release of the lipid payloads using microgels and droplet-based microfluidics. To address the importance of microfluidics for lipid-nanoparticle screening, an overview of how microfluidic systems can be used to mimic the cellular environment is also presented. Future trends and perspectives in designing novel nano and micro scales are also discussed herein.

Correlating Electron Tomography and Plasmon Spectroscopy of Single Noble Metal Core–Shell Nanoparticles

Nano Letters ◽  
2011 ◽  
Vol 12 (1) ◽  
pp. 145-150 ◽  
Author(s):  
Lev Chuntonov ◽  
Maya Bar-Sadan ◽  
Lothar Houben ◽  
Gilad Haran
Keyword(s):  
Noble Metal ◽  
Electron Tomography ◽  
Core Shell ◽  
Metal Core ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Natural Polyampholyte-Based Core−Shell Nanoparticles withN-Carboxyethylchitosan-Containing Core and Poly(ethylene oxide) Shell

2009 ◽  
Vol 10 (4) ◽  
pp. 838-844 ◽  
Author(s):  
Rosica Mincheva ◽  
François Bougard ◽  
Dilyana Paneva ◽  
Magali Vachaudez ◽  
Nevena Manolova ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Oxide Shell ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Core Shell Nanoparticles

Characterization of a Porous Carbon Material Functionalized with Cobalt-Oxide/Cobalt Core-Shell Nanoparticles for Lithium Ion Battery Electrodes

MRS Advances ◽  
2016 ◽  
Vol 1 (15) ◽  
pp. 1061-1066
Author(s):  
Dalaver H. Anjum ◽  
Shahid Rasul ◽  
Manuel A. Roldan-Gutierrez ◽  
Pedro M. F. J. Costa
Keyword(s):  
Lithium Ion Battery ◽  
Cobalt Oxide ◽  
Lithium Ion ◽  
Oxide Shell ◽  
Porous Carbon Material ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Transmission Electron ◽  
Core Shell Nanoparticles ◽  
Type Lattice

ABSTRACTA nanoporous carbon (C) material, functionalized with Cobalt-Oxide/Cobalt (CoO/Co) core-shell nanoparticles (NPs), was structurally and chemically characterized with transmission electron microcopy (TEM) while its electrochemical response for Lithium ion battery (LIB) applications was evaluated as well. The results herein show that the nanoporous C material was uniformly functionalized with the CoO/Co core-shell NPs. Further the NPs were crystalline with fcc-type lattice on the Co2+ oxide shell and hcp-type core of metallic Co0. The electrochemical study was carried out by using galvanostatic charge/discharge cycling at a current density of 1000 mA g−1. The potential of this hybrid material for LIB applications was confirmed and it is attributed to the successful dispersion of the Co2+/ Co0 NPs in the C support.

scholarly journals Surfaces and Interfaces of Liquid Metal Core–Shell Nanoparticles under the Microscope

2020 ◽  
Vol 37 (5) ◽  
pp. 1900469
Author(s):  
Sabrina S. Hafiz ◽  
Daniela Labadini ◽  
Ryan Riddell ◽  
Erich P. Wolff ◽  
Marvin Xavierselvan ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Core Shell ◽  
Metal Core ◽  
Shell Nanoparticles ◽  
Surfaces And Interfaces ◽  
Core Shell Nanoparticles

scholarly journals Electrochemical Preparation of Synergistic Nanoantimicrobials

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 49 ◽  
Author(s):  
Maria Chiara Sportelli ◽  
Daniela Longano ◽  
Elisabetta Bonerba ◽  
Giuseppina Tantillo ◽  
Luisa Torsi ◽  
...  
Keyword(s):  
Bacterial Infections ◽  
Methyl Ketone ◽  
Composite Coatings ◽  
Antimicrobial Properties ◽  
Synergistic Action ◽  
Vinyl Methyl ◽  
Metal Core ◽  
Shell Nanoparticles ◽  
Electrochemical Preparation ◽  
Core Shell Nanoparticles

The rapid spreading of resistance among common bacterial pathogens towards the misused antibiotics/disinfectant agents has drawn much attention worldwide to bacterial infections. In light of this, the present work aimed at the realization of core–shell nanoparticles possessing remarkable antimicrobial properties thanks to the synergistic action of the metal core and the disinfectant shell. Copper nanoparticles stabilized by benzalkonium chloride were prepared, characterized, and implemented in poly-vinyl-methyl ketone to obtain nanoantimicrobial composite coatings. Bioactivity tests are reported, proving the excellent disinfectant properties of the proposed nanomaterials, as compared to one of the well-known and strongest silver-based nanoantimicrobials. Applications are also briefly described.

HYBRID SEMICONDUCTING QUANTUM DOTS–METALLIC NANOPARTICLES ARRAYS FOR POSSIBLE NANOPHOTONIC DEVICES

2011 ◽  
Vol 10 (04n05) ◽  
pp. 1113-1118
Author(s):  
M. HARIDAS ◽  
J. K. BASU
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Metallic Nanoparticles ◽  
Quantum Information Processing ◽  
Imaging Techniques ◽  
Large Area ◽  
Nanophotonic Devices ◽  
Wide Range ◽  
Potential Applications ◽  
Assembly Technique

Arrays of quantum dots and hybrid arrays of semiconducting quantum dots and metallic nanoparticles have wide range of potential applications from nanophotonics to quantum information processing. Creating such arrays with well-defined morphology and order over a large area is a challenge. We present a reliable method for constructing such arrays using simple self assembly technique. The reliability of the method is verified using AFM. The emission properties of such system are studied using high resolution imaging techniques and we have given the possible explanation for the observed phenomena.

Synthesis and Characterization of Fe/Nd2O3 Core–Shell Nanoparticles by Hydrogen Plasma-Metal Reaction

2006 ◽  
Vol 6 (3) ◽  
pp. 743-747 ◽  
Author(s):  
Tong Liu ◽  
Shicheng Zhang ◽  
Xingguo Li
Keyword(s):  
Hydrogen Plasma ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
X Ray ◽  
Nanoparticle Surface ◽  
Transmission Electron ◽  
Potential Applications ◽  
Catalytic Fields ◽  
Core Shell Nanoparticles

Fe/Nd2O3 core–shell nanoparticles (CSNs) with a mean diameter of 35 nm were produced successfully by using hydrogen plasma-metal reaction (HPMR) method. This core–shell structure was confirmed by high resolution transmission electron microscopy (HRTEM), energy dispersion X-ray spectroscopy (EDS), X-ray photoelectron spectral (XPS), and induction-coupled plasma (ICP) spectroscopy. The magnetic properties were measured by vibrating sample magnetometer (VSM). It was found that the mole ratio of Nd to Fe on the nanoparticle surface is 1.2:1, about 7 times of that of the whole nanoparticle. The saturation magnetization Ms and remanence Mr of Fe/Nd2O3 nanoparticles decrease prominently from Fe nanoparticles, whereas the coercivity HC drops only less than 5% of Fe nanoparticle. These CSNs have potential applications in magnetic and catalytic fields.

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