ELECTROPHORETIC CONCENTRATION AND PRODUCTION OF CONDUCTIVE COATINGS FROM SILVER NANOPARTICLES STABILIZED WITH NON-IONIC SURFACTANT SPAN 80

2021 ◽  
pp. 126961
Author(s):  
Pavel Sergeevich Popovetskiy ◽  
Alexei Nikitich Kolodin ◽  
Eugenie Anatolievich Maximovskiy ◽  
Pavel Eugenievich Plyusnin ◽  
Ilya Victorovich Korolkov ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Ionic Surfactant ◽  
Conductive Coatings ◽  
Electrophoretic Concentration ◽  
Span 80

Design and Evaluation of Acyclovir Niosomes

2021 ◽  
pp. 4185-4188
Author(s):  
A. Anka Rao ◽  
Swarupa Arvapalli ◽  
G. S. N. Koteswara Rao ◽  
Narender. Malothu ◽  
Naga Raju. Bandaru
Keyword(s):  
Drug Release ◽  
Size Range ◽  
In Vitro Release ◽  
Ionic Surfactant ◽  
Injection Method ◽  
Release Pattern ◽  
Zero Order Release ◽  
Span 80 ◽  
Preformulation Studies

The current study aims to formulate and evaluate acyclovir loaded niosomes for sustained release of acyclovir. Stable Acyclovir loaded Niosomes can be prepared by hand shaking method and ether injection method with Span 80 and cholesterol in the ratio of 1:1, 2:1, and 3:1. Preformulation studies and drug excipients compatibility studies was done initially and results directed the further course of formulation. Most of the vesicles are spherical in shape, the size range of the vesicles, fall in the narrow size range of 0.5-5 and 0.5-2.5 by hand shaking method and ether injection method respectively. A high % of Acyclovir can be encapsulated in the vesicles (75-84%) prepared by hand shaking method. Concentration of non-ionic surfactant such as Span 80 might influences the drug release pattern of all formulation. In vitro release of Acyclovir from niosomes was very slow when compared to the release from pure Acyclovir solution. Drug release studies showed that the niosomal preparation was stable at refrigeration temperature (40C). The vesicles prepared by hand shaking method were found to be larger in size as compared to vesicles prepared by ether injection method. Almost constant drug release was observed in all formulations indicating zero order release pattern.

Orientation of a TICT Probe Trapped in the Peripheral Confined Water Created by Ionic Surfactant Envelope around Silver Nanoparticles

Langmuir ◽  
2011 ◽  
Vol 27 (7) ◽  
pp. 4068-4075 ◽  
Author(s):  
Arnab Maity ◽  
Syed S. Jaffer ◽  
Tarasankar Das ◽  
Prasun Ghosh ◽  
Pradipta Purkayastha
Keyword(s):  
Silver Nanoparticles ◽  
Ionic Surfactant ◽  
Confined Water

scholarly journals Pengaruh Perbedaan Konsentrasi Surfaktan Non Ionik terhadap Karaktersitik Niosom Pterostilben

2020 ◽  
Vol 6 (1) ◽  
pp. 21-26
Author(s):  
Kartika Zulfa ◽  
◽  
Ferri Widodo ◽  
Oktavia Eka Puspita ◽  
◽  
...  
Keyword(s):  
Particle Size ◽  
Uv Light ◽  
Gene Mutations ◽  
Ionic Surfactant ◽  
Skin Damage ◽  
Surfactant Vesicles ◽  
Optimum Formulation ◽  
Span 80 ◽  
Span 60 ◽  
Cellular Dna

Excessive radiation from UV light can cause skin damage to melanoma, especially UVB rays. Chronic effects from exposure of excessive UVB rays can induce gene mutations because the exposure of excessive UVB rays directly causes damage to cellular DNA by producing ROS in the epidermis, dermis, and skin epithelium cells. The use of sunscreen is very necessary to prevent skin damage. Sunscreen containing antioxidants are highly recommended to protect the skin from free radicals UVB rays. Pterostilbene is one of the phenolic compounds, which has the pharmacological activity of antioxidants and UV filters to be one of the recommended compounds for sunscreen components. A good delivery system is needed to be formulated to improve the pharmacological effects of pterostilbene on topical use. Niosomes are non-ionic surfactant vesicles which are one of the amphiphilic carrier systems which can carry hydrophobic active ingredients such as pterostilbene, which are expected to increase the pharmacological effect by increasing the penetration of pterostilbene into the skin. Pterostilbene niosome using non-ionic surfactant (span 80 and span 60) by thin layer hydration method. The research aimed to examine the effect of surfactant concentration (span 80 and span 60) 2, 4, and 6 g toward the characterization of niosome pterostilbene and determine the optimum formulation by particle size. The results of the study showed that the particle size was smaller with an increase in span concentration. Based on these results, the optimum formulation of pterostilbene niosomes is obtained using span 60 with a concentration of 6 g.

Formation of Core–Shell Structures in Emulsion Electrospun Fibres: A Comparative Study

2014 ◽  
Vol 67 (10) ◽  
pp. 1403 ◽  
Author(s):  
Chong Wang ◽  
Min Wang
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Shell Structure ◽  
Sodium Dodecyl ◽  
Water Phase ◽  
Shell Structures ◽  
Ionic Surfactant ◽  
Core Shell ◽  
The Core ◽  
Core Shell Structure ◽  
Span 80

Electrospinning has attracted great attention in recent years from different industries including biomedical engineering. Owing to the relative ease of fabricating ultrafine fibres with core–shell structures, emulsion electrospinning has been investigated intensively for making nanofibrous delivery vehicles for local and sustained release of bioactive or therapeutic substances, especially biomolecules such as growth factors. In preparing emulsions for electrospinning, different surfactants, ionic or non-ionic, can be used, which may subsequently influence the evolution of the core–shell structure in the electrospun emulsion jet or fibre. In this investigation, emulsions consisting of deionized water or phosphate buffer saline as the water phase, a poly(lactic-co-glycolic acid) solution as the oil phase and Span 80 (a non-ionic surfactant) or sodium dodecyl sulfate (an ionic surfactant) were electrospun into fibres for studying the core–shell structure and its evolution in emulsion electrospun fibres. Different microscopies were employed to study the morphological changes of the water phase in fibre samples collected at different locations along the jet (or fibre) trajectory during emulsion electrospinning. It was found that the evolution of the fibre core–shell structure was significantly different when different surfactants were used. If Span 80 was the surfactant, the water phase within the thick emulsion jet (or fibre) close to the Taylor cone existed in a discrete state whereas in ultrafine fibres collected beyond a certain distance from the Taylor cone, a mostly continuous water-phase core was observed. If sodium dodecyl sulfate was the surfactant, the core–shell structure in the thick jet (or fibre) was irregular but relatively continuous. A single core core–shell structure was eventually developed in ultrafine fibres. The core–shell structure in electrospun fibres and its evolution were also affected by the emulsion composition (e.g. polymer solution concentration, water-phase volume, and ion addition in the water phase).

scholarly journals Nanocomposite Inks Based on Nickel–Silver Core–Shell and Silver Nanoparticles for Fabrication Conductive Coatings at Low-Temperature Sintering

2021 ◽  
Vol 5 (1) ◽  
pp. 15
Author(s):  
Anna Pajor-Świerzy ◽  
Franciszek Szendera ◽  
Radosław Pawłowski ◽  
Krzysztof Szczepanowicz
Keyword(s):  
Silver Nanoparticles ◽  
Low Temperature ◽  
Low Cost ◽  
Future Application ◽  
Core Shell ◽  
Low Temperature Sintering ◽  
Ag Nps ◽  
Conductive Coatings ◽  
Nickel Silver ◽  
Silver Core

Nanocomposite inks composed of nickel–silver core–shell and silver nanoparticles (NPs) can combine the advantages of lower cost, high conductivity, and low-temperature sintering processes, which have attracted much attention in the development of materials for printed flexible electronics. In this context, in the present paper, we report the process of preparation of nanocomposite ink containing nickel–silver core–shell nanoparticles, as the main filler, and silver nanoparticles, as doping material, and their application for the fabrication of conductive coatings. It was found that the addition of a low concentration of Ag NPs to ink formulation based mainly on low-cost Ni-Ag NPs improves the conductive properties of coatings fabricated by ink deposition on a glass substrate. Two types of prepared nanocomposite ink coatings showed promising properties for future application: (1) doped with 0.5% of Ag NPs sintered at 200 °C as low cost for larger industrial application and, (2) containing 1% of Ag NPs sintered at 150 °C for the fabrication of conductive printed patterns on flexible substrates. The conductivity of such nanocomposite films was similar, about of 6 × 106 S/m, which corresponds to 35% of that for a bulk nickel.

scholarly journals Development of Non-ionic Surfactant and Protein-Coated Ultrasmall Silver Nanoparticles: Increased Viscoelasticity Enables Potency in Biological Applications

ACS Omega ◽  
2020 ◽  
Vol 5 (15) ◽  
pp. 8999-9006
Author(s):  
Mousumi Mukherjee ◽  
Kaustav Gangopadhyay ◽  
Rahul Das ◽  
Pradipta Purkayastha
Keyword(s):  
Silver Nanoparticles ◽  
Ionic Surfactant ◽  
Biological Applications

Controlled convective self-assembly of silver nanoparticles in volatile organic solvent and its application in electronics

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 98747-98756 ◽  
Author(s):  
Chengpeng Jiang ◽  
Li Li ◽  
Philip W. T. Pong
Keyword(s):  
Silver Nanoparticles ◽  
Organic Solvent ◽  
Self Assembly ◽  
Ag Nanoparticles ◽  
Conductive Coatings ◽  
Volatile Solvents ◽  
Volatile Organic

A controlled convective self-assembly approach is reported for producing conductive coatings and patterns using ultra-small Ag nanoparticles in volatile solvents.

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