Silver nanowires with five-fold symmetric cross-section

Gao, Yan; Li, Song; Jiang, Peng; Liu, L.F.; Yan, Xiaoqin; Zhou, Zhang; Liu, D.F.; Wang, J.X.; Yuan, Huajun; Zhang, Z.X.; Zhao, Xiaowei; Dou, Xiaomin; Zhou, Weiya; Wang, G.; Xie, Sishen; Chen, H.Y.; Li, J.Q.

doi:10.1016/j.jcrysgro.2004.11.396

Cited by 111 publications

(87 citation statements)

References 36 publications

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“…[47,48]), the peaks were attributed to the SPR bands of the longitudinal and transverse modes of Ag nanowires, respectively. However, in [49,50], the same peaks were attributed to the out-of-plane quadrupole and out-of-plane dipole resonance modes (transverse modes) of the one-dimensional Ag structures, respectively. Figure 2 also shows a tail band above 450 nm, which can be attributed to the overlapping of the in-plane quadrupole and dipole resonance modes of the Ag nanowires with peaks at 445 and 514 nm, respectively [50].…”

Section: Resultsmentioning

confidence: 93%

“…However, in [49,50], the same peaks were attributed to the out-of-plane quadrupole and out-of-plane dipole resonance modes (transverse modes) of the one-dimensional Ag structures, respectively. Figure 2 also shows a tail band above 450 nm, which can be attributed to the overlapping of the in-plane quadrupole and dipole resonance modes of the Ag nanowires with peaks at 445 and 514 nm, respectively [50]. Figure 3 shows the XRD spectrum of the silver nanorods grown on the Ti layer.…”

Section: Resultsmentioning

confidence: 93%

“…The peaks are attributed to the surface plasmon resonance (SPR) bands of the longitudinal and transverse modes of the silver nanorods, respectively. In fact, it was previously reported that the main SPR peaks for Ag nanorods and nanowires appear at ∼350 and ∼380 nm [44][45][46][47][48][49][50][51]. In some reports (e.g.…”

Section: Resultsmentioning

confidence: 99%

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Enhancement of antibacterial properties of Ag nanorods by electric field

Akhavan

Ghaderi

2009

Science and Technology of Advanced Materials

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The effect of an electric field on the antibacterial activity of columnar aligned silver nanorods was investigated. Silver nanorods with a polygonal cross section, a width of 20-60 nm and a length of 260-550 nm, were grown on a titanium interlayer by applying an electric field perpendicular to the surface of a Ag/Ti/Si(100) thin film during its heat treatment at 700• C in an Ar+H 2 environment. The optical absorption spectrum of the silver nanorods exhibited two peaks at wavelengths of 350 and 395 nm corresponding to the main surface plasmon resonance bands of the one-dimensional silver nanostructures. It was found that the silver nanorods with an fcc structure were bounded mainly by {100} facets. The antibacterial activity of the silver nanorods against Escherichia coli bacteria was evaluated at various electric fields applied in the direction of the nanorods without any electrical connection between the nanorods and the capacitor plates producing the electric field. Increasing the electric field from 0 to 50 V cm −1 resulted in an exponential increase in the relative rate of reduction of the bacteria from 3.9 × 10 −2 to 10.5 × 10 −2 min −1 . This indicates that the antibacterial activity of silver nanorods can be enhanced by applying an electric field, for application in medical and food-preserving fields.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 93%

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Enhancement of antibacterial properties of Ag nanorods by electric field

Akhavan

Ghaderi

2009

Science and Technology of Advanced Materials

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“…The strong quadratic dependence of the elastic strain energy of a disclination on the size of the crystal precludes the five-fold twinned structures from appearing in bulk crystals and largely limits their habitat to nanoparticles and nanowires with sizes up to several tens of nanometers [79,[80][81][82][83]. The pentagonal twinned structures have also been reported for nanocrystalline metals synthesized by severe plastic deformation techniques [84][85][86], where the formation of the fivefold deformation twins is attributed to a sequential twinning occurring under conditions of changing orientation of external stresses [87,88].…”

Section: Structure Of the Nanocrystalline Surface Layermentioning

confidence: 99%

Generation of subsurface voids and a nanocrystalline surface layer in femtosecond laser irradiation of a single-crystal Ag target

et al. 2015

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Structural transformations in a shallow surface region of a bulk Ag (001) target irradiated by a femtosecond laser pulse are investigated in large-scale atomistic simulations and experiments.The simulations reveal a complex interplay of fast laser melting, rapid resolidification, and the dynamic relaxation of laser-induced stresses that leads to the formation of a sub-surface porous region covered by a nanocrystalline surface layer. The generation of the porous region is consistent with the experimental observation of surface "swelling" occurring at laser fluences below the spallation/ablation threshold and may be related to the incubation effect in multi-pulse laser ablation of metals. The nanocrystalline layer is produced by massive nucleation of crystallites triggered by a deep undercooling of the melted surface region experiencing fast quenching at a rate on the order of 10 11 K/s. The predicted surface structure features random crystallographic orientation of nanograins and a high density of stacking faults, twins, and nanoscale twinned structural elements with five-fold symmetry, which suggests high hardness and possible enhancement of catalytic activity of the surface.

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“…[17] The uniaxial growth of silver nanowires was illustrated based on Ag:O coordination of the absorbed polyvinylpyrrolidone (PVP) on Ag nanowires' surfaces. [18] Furthermore, the growth mechanisms of Ag nanostructures via microwave-polyol method in the presence of Pt as the catalyst have been studied. [19,20] They showed that PVP tends to be absorbed on the {111} facets at short heating time.…”

Section: Introductionmentioning

confidence: 99%

Interactive effect of agitation rate and oxidative etching on growth mechanisms of silver nanowires during polyol process

Amirjani

Haghshenas

Marashi

2015

Journal of Experimental Nanoscience

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In this work, the interaction between agitation rate and oxidative etching on the growth mechanisms of silver nanowires during polyol process, the most conventional applied method for metallic nanoparticles synthesis, is evaluated. It was found that the main reason for the formation of multidiameter nanowires (MDNWs) is the local accumulation of silver ions in the system, i.e. even at a low concentration of silver ions (94 mM) under the mild agitation conditions, MDNWs were producible. Moreover, it was inferred that the more stress (stemming from the high agitation) applied on the initially formed decahedron Ag particles affects the 're-entrant grooves opening' process which results in the formation and growth of irregular nanostructures. A polynomial equation for tuning aspect ratio of silver nanowires using different concentration of CuCl 2 solution was also proposed. Finally, based on the obtained experimental data together with the thermodynamic considerations, a growth mechanism was proposed which can promisingly be employed for describing the one-dimensional growth of silver nanowires in both surfactant-modified and surfactant-free procedures.

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Silver nanowires with five-fold symmetric cross-section

Cited by 111 publications

References 36 publications

Enhancement of antibacterial properties of Ag nanorods by electric field

Enhancement of antibacterial properties of Ag nanorods by electric field

Generation of subsurface voids and a nanocrystalline surface layer in femtosecond laser irradiation of a single-crystal Ag target

Interactive effect of agitation rate and oxidative etching on growth mechanisms of silver nanowires during polyol process

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