Synthesis and characterization of silica nanosprings by a low temperature chemical vapor deposition

Zhang, D.; Jasiński, Jacek B.; Dunlap, Michael R.; Badal, M.; Leppert, Valerie J.; Katkanant, V.

doi:10.1007/s00339-008-4592-1

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…[1][2][3][4] Of these forms, silica nanowires have a unique one-dimensional structure and properties with potential applications in nano-electromechanical systems, such as sensors and optical devices. [5][6][7] To facilitate the use of silica NWs in these devices, the mechanical properties and the associated phenomena which govern such nanostructures need to be well understood.…”

Section: Introductionmentioning

confidence: 99%

Size dependence of elastic mechanical properties of nanocrystalline aluminum

Dávila

2017

Materials Science and Engineering: A

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Shape memory effects and pseudoelasticity in bcc metallic nanowires J. Appl. Phys. 108, 113531 (2010) This study investigates the structural transformations and properties of silica glass nanowires under tensile loading via molecular dynamics simulations using the BKS (Beest-Kramer-Santen) interatomic potential. Surface states of the elongated nanowires were quantified using radial density distributions, while structural transformations were evaluated via ring size distribution analysis. The radial density distributions indicate that the surface states of these silica nanowires are significantly different than those of their interior. Ring size analysis shows that the ring size distributions remain mainly unchanged within the elastic region during tensile deformation, however they vary drastically beyond the onset of plastic behavior and reach plateaus when the nanowires break. The silica nanowires undergo structural changes which correlate with strain energy and ring size distribution variations. It is also found that the ring size distribution (and strain energy) variations are dependent on the diameter of the silica nanowires. Interestingly, for ultrathin nanowires (diameters < 5 .0 nm), the variation of ring size distributions shows a distinct trend with respect to tensile strain, indicating that the surface states play a key role in both modifying the mechanical properties and structural characteristics. These results for ultrathin nanowires are consistent with prior theoretical and simulation predictions. The overall findings in this study provide key insights into the novel properties of nano-sized amorphous materials, and are aimed to inspire further experiments. V C 2015 AIP Publishing LLC.

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Section: Introductionmentioning

confidence: 99%

Size dependence of elastic mechanical properties of nanocrystalline aluminum

Dávila

2017

Materials Science and Engineering: A

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“…Independent experiments on compressed silica glass [6,7] have indicated an enhancement of Raman lines associated with the smaller rings via specific vibration frequencies. Modern synthesis efforts have been able to readily produce various types of oxide nanostructures, such as silica nanowires (SNWs), silica nanosprings, etc., with precise morphologies, depending on various factors including temperature [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Anomalous surface states modify the size-dependent mechanical properties and fracture of silica nanowires

Tang

Dávila

2014

Nanotechnology

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Molecular dynamics simulations of amorphous silica nanowires under tension were analyzed for size and surface stress effects on mechanical properties and for structural modifications via bond angle distributions. Their fracture behavior was also investigated beyond the elastic limit. The Young's moduli of silica nanowires were predicted to be about 75-100 GPa, depending on the nanowire size. The ultimate strength was calculated to be ∼10 GPa, depending on the diameter, which is in excellent agreement with the experiments. The dependence of the Young's modulus on nanowire diameter is explained in terms of surface compressive stress effects. The fracture behavior of nanowires was also found to be influenced by surface compressive stresses. Bond angle distribution analysis of various nanowires reveals significant compressive surface states, as evidenced by the appearance of a secondary peak in the Si-O-Si bond angle distribution at ∼97°, which is absent in bulk silica. The strain rate was found to have a negligible effect on the Young's modulus of the silica nanowires, but it has a critical role in determining their fracture mode.

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“…Qu et al have synthesized a variety of silica nanocoils with the presence of cobalt nanoparticle catalysts [10]. Using silane-like gas and pure oxygen as the precursors, Zhang et al synthesized silica nanosprings by a low temperature deposition with Au as a catalyst [11]. With the help of CTAB in acidic aqueous solutions, amorphous silica helices have been prepared [12].…”

Section: Introductionmentioning

confidence: 98%

Synthesis of silica microcoils by catalyst-free carbothermic method

Zheng

2011

Journal of Non-Crystalline Solids

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Synthesis and characterization of silica nanosprings by a low temperature chemical vapor deposition

Cited by 7 publications

References 16 publications

Size dependence of elastic mechanical properties of nanocrystalline aluminum

Size dependence of elastic mechanical properties of nanocrystalline aluminum

Anomalous surface states modify the size-dependent mechanical properties and fracture of silica nanowires

Synthesis of silica microcoils by catalyst-free carbothermic method

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