IndiumV3, Main, Repository, bibRecord, 000508

Spontaneous Periodic Diameter Oscillations in InP Nanowires: The Role of Interface Instabilities

Identifieur interne : 000508 ( Main/Repository ); précédent : 000507; suivant : 000509

Spontaneous Periodic Diameter Oscillations in InP Nanowires: The Role of Interface Instabilities

Auteurs : RBID : Pascal:13-0158755

Descripteurs français

Pascal (Inist)
- Composé III-V, Semiconducteur III-V, Nanofil, Nanomatériau, Interface, Instabilité, Croissance cristalline en phase vapeur, Défaut empilement, Transformation phase, Zinc, Précurseur, Morphologie, Déformation, Phase vapeur, Phosphure d'indium, Nitrure de ruthénium, Catalyseur, Nanoparticule, Nucléation, Mécanisme croissance, Synthèse nanomatériau, InP, Zn, Substrat indium, RuN, 8107V, 8107B, 6470N, 6865.
Wicri :
- concept : Zinc.

English descriptors

KwdEn :
- Catalysts, Crystal growth from vapors, Deformation, Growth mechanism, III-V compound, III-V semiconductors, Indium phosphide, Instability, Interfaces, Morphology, Nanomaterial synthesis, Nanoparticles, Nanostructured materials, Nanowires, Nucleation, Phase transformations, Precursor, Ruthenium nitride, Stacking faults, Vapor phase, Zinc.

Abstract

We have observed that thin InP nanowires generated by vapor-liquid-solid growth display spontaneous periodic diameter oscillations when large group III supersaturations are used. Diameter variations are associated with a large number of stacking faults and crystallographic phase changes(wurtzite/zinc-blende); also the axial distance between oscillations depends on the indium precursor flow used during the run. We attribute the morphology changes to a substantial deformation of the triple phase line (vapor-liquid-solid) at the catalyst nanoparticle edge originated from multistep nucleation during growth. The deformation alters the mechanical force balance acting on the nanoparticle during growth in such a way that the particle displaces from the nanowire top and wets the nanowire sidewall. Subsequently, as catalytic growth occurs at the sidewall, the associated increase in diameter will eventually push the NP back to its original wire-top position until the onset of a new instability at the triple phase line.

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Pascal:13-0158755

Le document en format XML

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<author><name sortKey="Oliveira, D S" uniqKey="Oliveira D">D. S. Oliveira</name>
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<author><name sortKey="Tizei, L H G" uniqKey="Tizei L">L. H. G. Tizei</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Instituto de Fisica "Gleb Wataghin", Universidade Estadual de Campinas, UNICAMP</s1>
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<author><name sortKey="Ugarte, D" uniqKey="Ugarte D">D. Ugarte</name>
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<author><name sortKey="Cotta, M A" uniqKey="Cotta M">M. A. Cotta</name>
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<term>Nanostructured materials</term>
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<term>Nucleation</term>
<term>Phase transformations</term>
<term>Precursor</term>
<term>Ruthenium nitride</term>
<term>Stacking faults</term>
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<term>Interface</term>
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<term>Croissance cristalline en phase vapeur</term>
<term>Défaut empilement</term>
<term>Transformation phase</term>
<term>Zinc</term>
<term>Précurseur</term>
<term>Morphologie</term>
<term>Déformation</term>
<term>Phase vapeur</term>
<term>Phosphure d'indium</term>
<term>Nitrure de ruthénium</term>
<term>Catalyseur</term>
<term>Nanoparticule</term>
<term>Nucléation</term>
<term>Mécanisme croissance</term>
<term>Synthèse nanomatériau</term>
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<term>Substrat indium</term>
<term>RuN</term>
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<front><div type="abstract" xml:lang="en">We have observed that thin InP nanowires generated by vapor-liquid-solid growth display spontaneous periodic diameter oscillations when large group III supersaturations are used. Diameter variations are associated with a large number of stacking faults and crystallographic phase changes(wurtzite/zinc-blende); also the axial distance between oscillations depends on the indium precursor flow used during the run. We attribute the morphology changes to a substantial deformation of the triple phase line (vapor-liquid-solid) at the catalyst nanoparticle edge originated from multistep nucleation during growth. The deformation alters the mechanical force balance acting on the nanoparticle during growth in such a way that the particle displaces from the nanowire top and wets the nanowire sidewall. Subsequently, as catalytic growth occurs at the sidewall, the associated increase in diameter will eventually push the NP back to its original wire-top position until the onset of a new instability at the triple phase line.</div>
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<fC01 i1="01" l="ENG"><s0>We have observed that thin InP nanowires generated by vapor-liquid-solid growth display spontaneous periodic diameter oscillations when large group III supersaturations are used. Diameter variations are associated with a large number of stacking faults and crystallographic phase changes(wurtzite/zinc-blende); also the axial distance between oscillations depends on the indium precursor flow used during the run. We attribute the morphology changes to a substantial deformation of the triple phase line (vapor-liquid-solid) at the catalyst nanoparticle edge originated from multistep nucleation during growth. The deformation alters the mechanical force balance acting on the nanoparticle during growth in such a way that the particle displaces from the nanowire top and wets the nanowire sidewall. Subsequently, as catalytic growth occurs at the sidewall, the associated increase in diameter will eventually push the NP back to its original wire-top position until the onset of a new instability at the triple phase line.</s0>
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Spontaneous Periodic Diameter Oscillations in InP Nanowires: The Role of Interface Instabilities

Spontaneous Periodic Diameter Oscillations in InP Nanowires: The Role of Interface Instabilities

Descripteurs français

English descriptors

Abstract

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