On the Polyol Synthesis of Silver Nanostructures: Glycolaldehyde as a Reducing Agent

Nano Letters ◽  
2008 ◽  
Vol 8 (7) ◽  
pp. 2077-2081 ◽  
Author(s):  
Sara E. Skrabalak ◽  
Benjamin J. Wiley ◽  
Munho Kim ◽  
Eric V. Formo ◽  
Younan Xia
Keyword(s):  
Reducing Agent ◽  
Polyol Synthesis ◽  
Silver Nanostructures

scholarly journals Green Formation of Spherical and Dendritic Silver Nanostructures under Microwave Irradiation without Reducing Agent

2012 ◽  
Vol 13 (7) ◽  
pp. 8086-8096 ◽  
Author(s):  
Monir Noroozi ◽  
Azmi Zakaria ◽  
Mohd Maarof Moksin ◽  
Zaidan Abd Wahab ◽  
Alam Abedini
Keyword(s):  
Microwave Irradiation ◽  
Reducing Agent ◽  
Silver Nanostructures

scholarly journals Durable Antimicrobial Behaviour from Silver-Graphene Coated Medical Textile Composites

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2000 ◽  
Author(s):  
Nuruzzaman Noor ◽  
Suhas Mutalik ◽  
Muhammad Waseem Younas ◽  
Cheuk Ying Chan ◽  
Suman Thakur ◽  
...  
Keyword(s):  
Soft Matter ◽  
Optical Emission ◽  
Textile Composites ◽  
Reducing Agent ◽  
Metallic Silver ◽  
Silver Nanostructures ◽  
Ion Release ◽  
Electron Microscopic ◽  
Host Matrix ◽  
X Ray

Silver nanoparticle (AgNP) and AgNP/reduced graphene oxide (rGO) nanocomposite impregnated medical grade polyviscose textile pads were formed using a facile, surface-mediated wet chemical solution-dipping process, without further annealing. Surfaces were sequentially treated in situ with a sodium borohydride (NaBH4) reducing agent, prior to formation, deposition, and fixation of Ag nanostructures and/or rGO nanosheets throughout porous non-woven (i.e., randomly interwoven) fibrous scaffolds. There was no need for stabilising agent use. The surface morphology of the treated fabrics and the reaction mechanism were characterised by Fourier transform infrared (FTIR) spectra, ultraviolet-visible (UV–Vis) absorption spectra, X-ray diffraction (XRD), Raman spectroscopy, dynamic light scattering (DLS) energy-dispersive X-ray analysis (EDS), and scanning electron microscopic (SEM). XRD and EDS confirmed the presence of pure-phase metallic silver. Variation of reducing agent concentration allowed control over characteristic plasmon absorption of AgNP while SEM imaging, EDS, and DLS confirmed the presence of and dispersion of Ag particles, with smaller agglomerates existing with concurrent rGO use, which also coincided with enhanced AgNP loading. The composites demonstrated potent antimicrobial activity against the clinically relevant gram-negative Escherichia coli (a key causative bacterial agent of healthcare-associated infections; HAIs). The best antibacterial rate achieved for treated substrates was 100% with only a slight decrease (to 90.1%) after 12 equivalent laundering cycles of standard washing. Investigation of silver ion release behaviours through inductively coupled plasmon optical emission spectroscopy (ICP-OES) and laundering durability tests showed that AgNP adhesion was aided by the presence of the rGO host matrix allowing for robust immobilisation of silver nanostructures with relatively high stability, which offered a rapid, convenient, scalable route to conformal NP–decorated and nanocomposite soft matter coatings.

scholarly journals Artificial Sweeteners and Sugar Ingredients as Reducing Agent for Green Synthesis of Silver Nanoparticles

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Shohreh Hemmati ◽  
Erin Retzlaff-Roberts ◽  
Corren Scott ◽  
Michael T. Harris
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Green Synthesis ◽  
Reducing Agents ◽  
Reducing Agent ◽  
Artificial Sweeteners ◽  
Silver Nanostructures ◽  
Artificial Sweetener ◽  
Transmission Electron ◽  
Vis Spectroscopy

An environmentally friendly technique has been developed to produce metal nanoparticles using green synthesis methods. In this study, silver nanostructures were synthesized using different sugar substitutes and artificial sweeteners as green reducing agents in an aqueous solution at low temperature. The main ingredients (such as maltodextrin, sucrose, saccharin, and sucralose) of the artificial sweeteners acting as reducing agents were used to reduce Ag+ ions to Ag0. The pH of the solution was controlled during synthesis through the addition of sodium hydroxide (NaOH) to increase the strength of the reducing agents by converting nonreducing sugars to reducing ones and consequently increasing the rate of silver nanoparticle formation. The size and morphology of the synthesized nanostructures were characterized by transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). The formation of nanostructures during the course of the reactions was investigated by UV-visible (UV-vis) spectroscopy characterization of an aliquot of sample at specific intervals. The function of each artificial sweetener and corresponding ingredients as a reducing agent and capping agent was investigated by Fourier-transform infrared spectroscopy (FTIR) and mass spectrometry (MS).

scholarly journals Revisiting the Polyol Synthesis of Silver Nanostructures: Role of Chloride in Nanocube Formation

ACS Nano ◽  
2019 ◽  
Author(s):  
Zhifeng Chen ◽  
Tonnam Balankura ◽  
Kristen A. Fichthorn ◽  
Robert M. Rioux
Keyword(s):  
Polyol Synthesis ◽  
Silver Nanostructures

Polyol Synthesis of Silver Nanostructures:  Control of Product Morphology with Fe(II) or Fe(III) Species

Langmuir ◽  
2005 ◽  
Vol 21 (18) ◽  
pp. 8077-8080 ◽  
Author(s):  
Benjamin Wiley ◽  
Yugang Sun ◽  
Younan Xia
Keyword(s):  
Polyol Synthesis ◽  
Silver Nanostructures ◽  
Product Morphology

scholarly journals Polyol Silver Nanowire Synthesis and the Outlook for a Green Process

2020 ◽  
Vol 2020 ◽  
pp. 1-25 ◽  
Author(s):  
Shohreh Hemmati ◽  
Michael T. Harris ◽  
Dale P. Barkey
Keyword(s):  
Silver Nanowires ◽  
Synthesis Method ◽  
Polyol Process ◽  
Silver Nanowire ◽  
Polyol Synthesis ◽  
High Yield ◽  
Silver Nanostructures ◽  
Wearable Electronics ◽  
Aspect Ratios ◽  
Size And Morphology

Silver nanowires (AgNWs) have a broad range of applications including nanoelectronics, energy conversion, health care, solar cells, touch screens, sensors and biosensors, wearable electronics, and drug delivery systems. As their characteristics depend strongly on their size and morphology, it is essential to find the optimal and most cost-effective synthesis method with precise control over the size and morphology of the wires. Various methods for AgNW synthesis have been reported along with process optimization and novel techniques to increase the yield and aspect ratios of synthesized AgNWs. The most promising processes for synthesis of AgNWs are wet chemical techniques, in which the polyol process is low cost and simple and provides high yield compared to other chemical methods. Reaction mechanism is one of the most important factors in strategies to control the process. Our purpose here is to provide an overview on the main findings regarding synthesis, preparation, and characterization of AgNWs. Recent efforts in the polyol synthesis of AgNWs are summarized with respect to product morphology and size, reaction conditions, and characterization techniques. The effect of essential factors such as reagent concentration and preparation, temperature, and reaction atmosphere that control the size, morphology, and yield of synthesized AgNWs is reviewed. Moreover, a review on the novel modified polyol process and reactor design such as continuous millifluidic and flow reactors to increase the yield of synthesized AgNWs on large scales is provided. The most recent proposed growth mechanisms and kinetics behind the polyol process are addressed. Finally, comparatively few available studies in green and sustainable development of 1D silver nanostructures through the application of natural products with inherent growth termination, stabilization, and capping characteristics are reviewed to provide an avenue to natural synthesis pathways to AgNWs. Future directions in both chemical and green synthesis approaches of AgNWs are addressed.

Preparation of SnO2 Powders by Modified Polyol Synthesis Using 1,2-Propanediol and Calcination

2013 ◽  
Vol 685 ◽  
pp. 63-67 ◽  
Author(s):  
Sang Soo Chee ◽  
Jong Hyun Lee
Keyword(s):  
Sodium Borohydride ◽  
Room Temperature ◽  
Synthesis Method ◽  
Reducing Agent ◽  
Polyol Method ◽  
Polyol Synthesis ◽  
Capping Agent ◽  
Modified Polyol Method

SnO2 powders were prepared using a modified polyol synthesis method and subsequent calcinations. Well-dispersed spherical 2SnO∙(H2O) particles could be synthesized at room temperature through the modified polyol method using tin (II) 2-ethylhexanoate as the precusor, 1,2-propanediol as the solvent, PVP as the capping agent, and sodium borohydride as the reducing agent. The 2SnO∙(H2O) nanoparticles agglomerated to form larger particles during the drying step, and most of these larger nanoparticles coalesced with one another. Finally, these 2SnO∙(H2O) nanoparticles were successfully transformed into the SnO2 phase by calcination for 1 h at 500 °C.

Shape-Controlled Synthesis of Silver and Gold Nanostructures

MRS Bulletin ◽  
2005 ◽  
Vol 30 (5) ◽  
pp. 356-361 ◽  
Author(s):  
Benjamin Wiley ◽  
Yugang Sun ◽  
Jingyi Chen ◽  
Hu Cang ◽  
Zhi-Yuan Li ◽  
...  
Keyword(s):  
Medical Application ◽  
Gold Nanostructures ◽  
Polyol Synthesis ◽  
Galvanic Replacement ◽  
Silver Nanostructures ◽  
Controlled Synthesis ◽  
Replacement Reaction ◽  
Silver Nanocubes ◽  
Shape Controlled ◽  
Future Work

AbstractThis article provides a brief account of solution-phase methods that generate silver and gold nanostructures with well-controlled shapes. It is organized into five sections: The first section discusses the nucleation and formation of seeds from which nanostructures grow. The next two sections explain how seeds with fairly isotropic shapes can grow anisotropically into distinct morphologies. Polyol synthesis is selected as an example to illustrate this concept. Specifically, we discuss the growth of silver nanocubes (with and without truncated corners), nanowires, and triangular nanoplates. In the fourth section, we show that silver nanostructures can be transformed into hollow gold nanostructures through a galvanic replacement reaction. Examples include nanoboxes, nanocages, nanotubes (both single- and multi-walled), and nanorattles. The fifth section briefly outlines a potential medical application for gold nanocages.We conclude with some perspectives on areas for future work.

Polyol synthesis of silver nanostructures: Inducing the growth of nanowires by a heat-up process

2014 ◽  
Vol 602 ◽  
pp. 10-15 ◽  
Author(s):  
Guh-Hwan Lim ◽  
Seong Jun Lee ◽  
Insung Han ◽  
Shingyu Bok ◽  
Jung Heon Lee ◽  
...  
Keyword(s):  
Polyol Synthesis ◽  
Silver Nanostructures
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