The influence of seeding conditions and shielding gas atmosphere on the synthesis of silver nanowires through the polyol process

Chen, Chang; Wang, Li; Jiang, Guohua; Yang, Qiang; Wang, Jianjun; Chen, Tao; Wang, Chiliang; Chen, Xu

doi:10.1088/0957-4484/17/2/021

Cited by 58 publications

(45 citation statements)

References 54 publications

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“…The silver nanocubes showed an absorption maximum at 503 nm corresponding to the literature [5,24]. The silver nanorods and the spherical particles showed absorption maxima at 405 and 431 nm, also in accordance with the literature [5,6,25,26]. The prepared silver particles clearly showed size-and shape-dependent absorption spectra.…”

Section: Resultssupporting

confidence: 87%

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Synthesis of PVP‐coated silver nanoparticles and their biological activity towards human mesenchymal stem cells

Kittler

Greulich

Köller

et al. 2009

Materialwissenschaft Werkst

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Silver nanoparticles were prepared by the polyol process, i.e. by the reduction of silver nitrate with ethylene glycol in the presence of polyvinylpyrrolidone, PVP. Thereby, the silver nanoparticles were colloidally stabilized by the polymer. The synthesis of nanoparticles of different size and shape (cubes, rods and spheres) was possible by changing the reaction conditions such as reagent ratio and temperature. The silver nanoparticles were characterized by dynamic light scattering (DLS), zeta-potential measurements, UVspectroscopy, and scanning electron microscopy (SEM). The biological activity of spherical PVP-coated silver nanoparticles (about 100 nm diameter) was tested on human mesenchymal stem cells (hMSC) in comparison with equivalent amounts of silver ions (silver acetate). hMSC were treated with silver concentrations in the range of 50 ng mL -1 to 50 lg mL -1 for 7 days under cell culture conditions. Cytotoxic cell reactions occurred at !2.5 lg Ag mL -1 for nanoparticles and !1 lg Ag mL -1 for silver acetate, indicating a critical role of the silver ions for toxic reactions.Key words: Silver nanoparticles, colloids, biological activity, mesenchymal stem cells.Die Silber-Nanopartikel wurden durch die Reduktion von Silbernitrat durch Ethylenglykol in Gegenwart von Polyvinylpyrrolidon, PVP, hergestellt (Polyol-Prozess). Die Silber-Nanopartikel werden dabei vom Polymer umhüllt und dadurch kolloidal stabilisiert. Die Synthese von Nanopartikeln mit unterschiedlicher Größe und Form (Würfel, Stäbchen, Kugeln) ist durch die Ä nderung der Reaktionsbedingungen (Verhältnis der Reagenzien, Temperatur) möglich. Die Silber-Nanopartikel wurden mit Dynamischer Lichtstreuung (DLS), Zetapotential-Messungen, UV-Spektroskopie und Rasterelektronenmikroskopie (REM) analysiert. Die biologische Aktivität kugelförmiger PVP-beschichteter Silber-Nanopartikel (Durchmesser ca. 100 nm) wurde im Vergleich mit einer äquivalenten Menge Silber-Ionen (Silberacetat) an humanen mesenchymalen Stammzellen (hMSC) getestet. Die hMSCs wurden jeweils mit Silberkonzentrationen im Bereich von 50 ng mL -1 bis 50 lg mL -1 für 7 Tage in Kultur genommen. Zelltoxische Reaktionen ergaben sich bei Silberkonzentrationen !2.5 lg Ag mL -1 für die Nanopartikel und !1 lg Ag mL -1 für Silberacetat, was die kritische Rolle der Silber-Ionen bei toxischen Reaktionen unterstreicht.

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Section: Resultssupporting

confidence: 87%

“…Nucleation and growth of these nanocrystals can be controlled by suitable capping agents. The influence of the shielding gas atmosphere during the polyol reduction process was also reported, emphasizing the need for a controlled synthesis [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of PVP‐coated silver nanoparticles and their biological activity towards human mesenchymal stem cells

Kittler

Greulich

Köller

et al. 2009

Materialwissenschaft Werkst

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“…On the other hand, at N 2 flow rate of 150 ml/min, the wires became thicker,~87.5 nm, and the formation of nanocrystals with different sizes and shapes was observed at the expense of low yield of NWs. Here, the amount of O 2 is reduced by adding N 2 gas or other inert gases to the system, and subsequently, the selective dissolution of specific crystal planes could be inhibited favoring the growth of cubic crystals as observed in other metallic systems [44]. Thus, the formation of wires and the inhibition of oxidation of the synthesized NWs and NPs were realized under an optimum N 2 flow rate of 100 ml/min.…”

Section: Effect Of the Amount Of N 2 Gas Flow On The Dimensional Propmentioning

confidence: 95%

Large-Scale Cu Nanowire Synthesis by PVP-Ethylene Glycol Route

Huaman

Urushizaki

Jeyadevan

2018

Journal of Nanomaterials

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Cu nanowire (NW) is a promising cost-benefit conducting material that could be considered for the development of transparent conducting films (TCF). However, the development of Cu NW as an alternating material for Ag or Au is not only limited by its stability in atmospheric conditions in the nanometer range but also due to the nonavailability of a simple synthetic route to produce them in high yields and in large-scale. Here, a scheme to synthesize Cu NWs by reducing Cu nitrate in a Cl − ionpolyvinylpyrrolidine-(PVP-) ethylene glycol (EG) system is proposed. Cu NWs with average diameter around 60 nm and average length of about 40 μm was obtained under optimized experimental conditions. Furthermore, the formation of Cu NW was elucidated to be through the progression of the following sequential reduction steps: at first, Cu ions underwent partial reduction to form spherical Cu 2 O. Then, the spherical Cu 2 O particles were redissolved and reduced to metallic Cu 0 atoms that subsequently formed the Cu seeds. Thereafter, Cu seeds underwent etching to form multiply-twinned particles (MTP). Finally, these Cu MTP grew unidirectionally to form metallic Cu NWs.

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“…The addition of particles playing the role of seeds can change the process of nucleation. Various nucleating agents, either in a pure form or as combination of a few salts, have been used to study the effect on AgNW growth [43,48,[50][51][52]. In general, chlorinated derivatives give good results, and in particular NaCl is often preferred.…”

Section: Fabrication Of Silver Nanowiresmentioning

confidence: 99%

Flexible transparent conductive materials based on silver nanowire networks: a review

Langley¹,

Giusti²,

Mayousse³

et al. 2013

Nanotechnology

650

510

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The class of materials combining high electrical or thermal conductivity, optical transparency and flexibility is crucial for the development of many future electronic and optoelectronic devices. Silver nanowire networks show very promising results and represent a viable alternative to the commonly used, scarce and brittle indium tin oxide. The science and technology research of such networks aims at better understanding the physical and chemical properties of this nanowire-based material while opening attractive new applications.

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The influence of seeding conditions and shielding gas atmosphere on the synthesis of silver nanowires through the polyol process

Cited by 58 publications

References 54 publications

Synthesis of PVP‐coated silver nanoparticles and their biological activity towards human mesenchymal stem cells

Synthesis of PVP‐coated silver nanoparticles and their biological activity towards human mesenchymal stem cells

Large-Scale Cu Nanowire Synthesis by PVP-Ethylene Glycol Route

Flexible transparent conductive materials based on silver nanowire networks: a review

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