Formation of Single-Crystal Spherical Particle Architectures by Plasma-Induced Low-Temperature Coalescence of Silicon Nanocrystals Synthesized by Laser Ablation in Water

V Svrcek, D Mariotti, K Kalia, C Dickinson, M Kondo

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7 Citations (Scopus)

Abstract

We report that the synthesis of silicon nanocrystals (SiNCs) by laser ablation in water produces unique surface characteristics and, in particular, hydroxyl-terminated surfaces, which can induce coalescence and formation of micrometer-sized single-crystal Si spherical particles under a low-temperature (550 °C) plasma process. We demonstrate that the spherical particles can be self-organized into aggregates that extend with varying gas concentrations. At the same time, SiNCs that were sufficiently apart not to coalesce have shown peculiar photoluminescence properties, which suggest an increased tunneling probability from self-trapped excitonic surface states.
LanguageEnglish
Pages6235-6242
JournalThe Journal of Physical Chemistry C
Volume115
Issue number14
DOIs
Publication statusPublished - 2011

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coalescing
laser ablation
nanocrystals
single crystals
silicon
water
micrometers
photoluminescence
synthesis
gases

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title = "Formation of Single-Crystal Spherical Particle Architectures by Plasma-Induced Low-Temperature Coalescence of Silicon Nanocrystals Synthesized by Laser Ablation in Water",
abstract = "We report that the synthesis of silicon nanocrystals (SiNCs) by laser ablation in water produces unique surface characteristics and, in particular, hydroxyl-terminated surfaces, which can induce coalescence and formation of micrometer-sized single-crystal Si spherical particles under a low-temperature (550 °C) plasma process. We demonstrate that the spherical particles can be self-organized into aggregates that extend with varying gas concentrations. At the same time, SiNCs that were sufficiently apart not to coalesce have shown peculiar photoluminescence properties, which suggest an increased tunneling probability from self-trapped excitonic surface states.",
author = "V Svrcek and D Mariotti and K Kalia and C Dickinson and M Kondo",
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language = "English",
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journal = "Journal Of Physical Chemistry C",
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T1 - Formation of Single-Crystal Spherical Particle Architectures by Plasma-Induced Low-Temperature Coalescence of Silicon Nanocrystals Synthesized by Laser Ablation in Water

AU - Svrcek, V

AU - Mariotti, D

AU - Kalia, K

AU - Dickinson, C

AU - Kondo, M

PY - 2011

Y1 - 2011

N2 - We report that the synthesis of silicon nanocrystals (SiNCs) by laser ablation in water produces unique surface characteristics and, in particular, hydroxyl-terminated surfaces, which can induce coalescence and formation of micrometer-sized single-crystal Si spherical particles under a low-temperature (550 °C) plasma process. We demonstrate that the spherical particles can be self-organized into aggregates that extend with varying gas concentrations. At the same time, SiNCs that were sufficiently apart not to coalesce have shown peculiar photoluminescence properties, which suggest an increased tunneling probability from self-trapped excitonic surface states.

AB - We report that the synthesis of silicon nanocrystals (SiNCs) by laser ablation in water produces unique surface characteristics and, in particular, hydroxyl-terminated surfaces, which can induce coalescence and formation of micrometer-sized single-crystal Si spherical particles under a low-temperature (550 °C) plasma process. We demonstrate that the spherical particles can be self-organized into aggregates that extend with varying gas concentrations. At the same time, SiNCs that were sufficiently apart not to coalesce have shown peculiar photoluminescence properties, which suggest an increased tunneling probability from self-trapped excitonic surface states.

U2 - 10.1021/jp111387q

DO - 10.1021/jp111387q

M3 - Article

VL - 115

SP - 6235

EP - 6242

JO - Journal Of Physical Chemistry C

T2 - Journal Of Physical Chemistry C

JF - Journal Of Physical Chemistry C

SN - 1932-7447

IS - 14

ER -