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Size-Dependent Structure Relations between Nanotubes and Encapsulated Nanocrystals.

The structural organization of compounds in a confined space of nanometer-scale cavities is of fundamental importance for understanding the basic principles for atomic structure design at the nanolevel. Here, we explore size-dependent structure relations between one-dimensional PbTe nanocrystals and... Full description

Journal Title: Nano letters February 8, 2017, Vol.17(2), pp.805-810
Main Author: Eliseev, Andrei A
Other Authors: Falaleev, Nikolay S , Verbitskiy, Nikolay I , Volykhov, Andrei A , Yashina, Lada V , Kumskov, Andrei S , Zhigalina, Victoria G , Vasiliev, Alexander L , Lukashin, Alexey V , Sloan, Jeremy , Kiselev, Nikolay A
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1530-6992 ; DOI: 1530-6992 ; DOI: 10.1021/acs.nanolett.6b04031
Link: http://search.proquest.com/docview/1852779894/?pq-origsite=primo
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title: Size-Dependent Structure Relations between Nanotubes and Encapsulated Nanocrystals.
format: Article
creator:
  • Eliseev, Andrei A
  • Falaleev, Nikolay S
  • Verbitskiy, Nikolay I
  • Volykhov, Andrei A
  • Yashina, Lada V
  • Kumskov, Andrei S
  • Zhigalina, Victoria G
  • Vasiliev, Alexander L
  • Lukashin, Alexey V
  • Sloan, Jeremy
  • Kiselev, Nikolay A
subjects:
  • 1d Crystals
  • Hrtem
  • Pbte
  • Single-Walled Carbon Nanotubes
  • Atomic Structure
  • Confinement
ispartof: Nano letters, February 8, 2017, Vol.17(2), pp.805-810
description: The structural organization of compounds in a confined space of nanometer-scale cavities is of fundamental importance for understanding the basic principles for atomic structure design at the nanolevel. Here, we explore size-dependent structure relations between one-dimensional PbTe nanocrystals and carbon nanotube containers in the diameter range of 2.0-1.25 nm using high-resolution transmission electron microscopy and ab initio calculations. Upon decrease of the confining volume, one-dimensional crystals reveal gradual thinning, with the structure being cut from the bulk in either a or a growth direction until a certain limit of ∼1.3 nm. This corresponds to the situation when a stoichiometric (uncharged) crystal does not fit into the cavity dimensions. As a result of the in-tube charge compensation, one-dimensional superstructures with nanometer-scale atomic density modulations are formed by a periodic addition of peripheral extra atoms to the main motif. Structural changes in the crystallographic configuration of the composites entail the redistribution of charge density on single-walled carbon nanotube walls and the possible appearance of the electron density wave. The variation of the potential attains 0.4 eV, corresponding to charge density fluctuations of 0.14 e/atom.
language: eng
source:
identifier: E-ISSN: 1530-6992 ; DOI: 1530-6992 ; DOI: 10.1021/acs.nanolett.6b04031
fulltext: no_fulltext
issn:
  • 15306992
  • 1530-6992
url: Link


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titleSize-Dependent Structure Relations between Nanotubes and Encapsulated Nanocrystals.
creatorEliseev, Andrei A ; Falaleev, Nikolay S ; Verbitskiy, Nikolay I ; Volykhov, Andrei A ; Yashina, Lada V ; Kumskov, Andrei S ; Zhigalina, Victoria G ; Vasiliev, Alexander L ; Lukashin, Alexey V ; Sloan, Jeremy ; Kiselev, Nikolay A
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descriptionThe structural organization of compounds in a confined space of nanometer-scale cavities is of fundamental importance for understanding the basic principles for atomic structure design at the nanolevel. Here, we explore size-dependent structure relations between one-dimensional PbTe nanocrystals and carbon nanotube containers in the diameter range of 2.0-1.25 nm using high-resolution transmission electron microscopy and ab initio calculations. Upon decrease of the confining volume, one-dimensional crystals reveal gradual thinning, with the structure being cut from the bulk in either a or a growth direction until a certain limit of ∼1.3 nm. This corresponds to the situation when a stoichiometric (uncharged) crystal does not fit into the cavity dimensions. As a result of the in-tube charge compensation, one-dimensional superstructures with nanometer-scale atomic density modulations are formed by a periodic addition of peripheral extra atoms to the main motif. Structural changes in the crystallographic configuration of the composites entail the redistribution of charge density on single-walled carbon nanotube walls and the possible appearance of the electron density wave. The variation of the potential attains 0.4 eV, corresponding to charge density fluctuations of 0.14 e/atom.
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