Size-dependent stability of ultra-small α-/β-phase tin nanocrystals synthesized by microplasma

Atta Ul Haq, Sadegh Askari, Anna McLister, Sean Rawlinson, James Davis, Supriya Chakrabarti, Vladimir Svrcek, Paul Maguire, Pagona Papakonstantinou, Davide Mariotti

Research output: Contribution to journalArticle

Abstract

Nanocrystals sometimes adopt unusual crystal structure configurations in order to maintain structural stability with increasingly large surface-to-volume ratios. The understanding of these transformations is of great scientific interest and represents an opportunity to achieve beneficial materials properties resulting from different crystal arrangements. Here, the phase transformation from α to β phases of tin (Sn) nanocrystals is investigated in nanocrystals with diameters ranging from 6.1 to 1.6 nm. Ultra-small Sn nanocrystals are achieved through our highly non-equilibrium plasma process operated at atmospheric pressures. Larger nanocrystals adopt the β-Sn tetragonal structure, while smaller nanocrystals show stability with the α-Sn diamond cubic structure. Synthesis at other conditions produce nanocrystals with mean diameters within the range 2–3 nm, which exhibit mixed phases. This work represents an important contribution to understand structural stability at the nanoscale and the possibility of achieving phases of relevance for many applications.
LanguageEnglish
Article number817
Pages1-8
Number of pages8
JournalNature Communications
Volume10
Issue number1
DOIs
Publication statusPublished - 18 Feb 2019

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Tin
Nanocrystals
Diamond
Atmospheric pressure
Materials properties
Crystal structure
Phase transitions
Plasmas
Crystals

Cite this

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title = "Size-dependent stability of ultra-small α-/β-phase tin nanocrystals synthesized by microplasma",
abstract = "Nanocrystals sometimes adopt unusual crystal structure configurations in order to maintain structural stability with increasingly large surface-to-volume ratios. The understanding of these transformations is of great scientific interest and represents an opportunity to achieve beneficial materials properties resulting from different crystal arrangements. Here, the phase transformation from α to β phases of tin (Sn) nanocrystals is investigated in nanocrystals with diameters ranging from 6.1 to 1.6 nm. Ultra-small Sn nanocrystals are achieved through our highly non-equilibrium plasma process operated at atmospheric pressures. Larger nanocrystals adopt the β-Sn tetragonal structure, while smaller nanocrystals show stability with the α-Sn diamond cubic structure. Synthesis at other conditions produce nanocrystals with mean diameters within the range 2–3 nm, which exhibit mixed phases. This work represents an important contribution to understand structural stability at the nanoscale and the possibility of achieving phases of relevance for many applications.",
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Size-dependent stability of ultra-small α-/β-phase tin nanocrystals synthesized by microplasma. / Haq, Atta Ul; Askari, Sadegh; McLister, Anna; Rawlinson, Sean; Davis, James; Chakrabarti, Supriya; Svrcek, Vladimir; Maguire, Paul; Papakonstantinou, Pagona; Mariotti, Davide.

In: Nature Communications, Vol. 10, No. 1, 817, 18.02.2019, p. 1-8.

Research output: Contribution to journalArticle

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AU - Haq, Atta Ul

AU - Askari, Sadegh

AU - McLister, Anna

AU - Rawlinson, Sean

AU - Davis, James

AU - Chakrabarti, Supriya

AU - Svrcek, Vladimir

AU - Maguire, Paul

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AU - Mariotti, Davide

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