Abstract
| Language | English |
|---|---|
| Pages | 17141-17149 |
| Journal | Nanoscale |
| Volume | 8 |
| Early online date | 23 Sep 2016 |
| DOIs | |
| Publication status | E-pub ahead of print - 23 Sep 2016 |
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Keywords
- nanocrystals
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Ultra-small photoluminescent silicon-carbide nanocrystals by atmospheric-pressure plasmas. / Askari, Sadegh; Ul Haq, Atta; Macias-Montero, Manuel; Levchenko, Igor; Yu, Fengjiao; Zhou, Wuzong; Ostrikov, Kostya (Ken); Maguire, PD; Svrcek, Vladimir; Mariotti, D.
In: Nanoscale, Vol. 8, 23.09.2016, p. 17141-17149.Research output: Contribution to journal › Article
TY - JOUR
T1 - Ultra-small photoluminescent silicon-carbide nanocrystals by atmospheric-pressure plasmas
AU - Askari, Sadegh
AU - Ul Haq, Atta
AU - Macias-Montero, Manuel
AU - Levchenko, Igor
AU - Yu, Fengjiao
AU - Zhou, Wuzong
AU - Ostrikov, Kostya (Ken)
AU - Maguire, PD
AU - Svrcek, Vladimir
AU - Mariotti, D
PY - 2016/9/23
Y1 - 2016/9/23
N2 - Highly size-controllable synthesis of free-standing perfectly crystalline silicon carbide nanocrystals has been achieved for the first time through a plasma-based bottom-up process. This low-cost, scalable, ligand-free atmospheric pressure technique allows fabrication of ultra-small (down to 1.5 nm) nanocrystals with very low level of surface contamination, leading to fundamental insights into optical properties of the nanocrystals. This is also confirmed by their exceptional photoluminescence emission yield enhanced by more than 5 times by reducing the nanocrystals sizes in the range of 1-5 nm, which is attributed to quantum confinement in ultra-small nanocrystals. This method is potentially scalable and readily extendable to a wide range of other classes of materials. Moreover, this ligand-free process can produce colloidal nanocrystals by direct deposition into liquid, onto biological materials or onto the substrate of choice to form nanocrystal films. Our simple but efficient approach based on non-equilibrium plasma environment is a response to the need of most efficient bottom-up processes in nanosynthesis and nanotechnology.
AB - Highly size-controllable synthesis of free-standing perfectly crystalline silicon carbide nanocrystals has been achieved for the first time through a plasma-based bottom-up process. This low-cost, scalable, ligand-free atmospheric pressure technique allows fabrication of ultra-small (down to 1.5 nm) nanocrystals with very low level of surface contamination, leading to fundamental insights into optical properties of the nanocrystals. This is also confirmed by their exceptional photoluminescence emission yield enhanced by more than 5 times by reducing the nanocrystals sizes in the range of 1-5 nm, which is attributed to quantum confinement in ultra-small nanocrystals. This method is potentially scalable and readily extendable to a wide range of other classes of materials. Moreover, this ligand-free process can produce colloidal nanocrystals by direct deposition into liquid, onto biological materials or onto the substrate of choice to form nanocrystal films. Our simple but efficient approach based on non-equilibrium plasma environment is a response to the need of most efficient bottom-up processes in nanosynthesis and nanotechnology.
KW - nanocrystals
U2 - 10.1039/C6NR03702J
DO - 10.1039/C6NR03702J
M3 - Article
VL - 8
SP - 17141
EP - 17149
JO - Nanoscale
T2 - Nanoscale
JF - Nanoscale
SN - 2040-3364
ER -