Details
| Original language | English |
|---|---|
| Pages (from-to) | 15104-15111 |
| Number of pages | 8 |
| Journal | NANOSCALE |
| Volume | 11 |
| Issue number | 32 |
| Early online date | 24 Jul 2019 |
| Publication status | Published - 15 Aug 2019 |
Abstract
A dependence of the formation of tri-n-octylphosphine-capped Ni nanocrystals on the presence of halide ions during their synthesis is shown. For the application-oriented synthesis of Ni particles, this information can be crucial. Furthermore, Ni nanoparticles can be converted to nickel phosphide or sulphide by heating them up in the presence of a phosphorus or sulphur source, resulting in either solid or hollow nanocrystals, formed via the nanoscale Kirkendall effect, depending on the synthesis route. By adjusting the Ni crystallite size in the initial nanoparticles via the halide ion concentration the cavity size of the resulting hollow nanocrystals can be tuned, which is otherwise impossible to realise for particles of a similar total diameter by using this process. The synthesised hollow Ni3S2 nanocrystals exhibit a much sharper localised surface plasmon resonance (LSPR) band than all previously presented particles of this material, which is known to show molar extinction coefficients at the LSPR maximum similar to Au. This narrow linewidth could be explained by the nanoparticles' high crystallinity resulting from the Kirkendall process and is interesting for various possible optical applications such as surface-enhanced Raman spectroscopy owing to the low cost of the involved materials compared to the widely used noble metals.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
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In: NANOSCALE, Vol. 11, No. 32, 15.08.2019, p. 15104-15111.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Halide ion influence on the formation of nickel nanoparticles and their conversion into hollow nickel phosphide and sulphide nanocrystals
AU - Himstedt, Rasmus
AU - Hinrichs, Dominik
AU - Sann, Joachim
AU - Weller, Anica
AU - Steinhauser, Georg
AU - Dorfs, Dirk
N1 - Funding information: D. H. and D. D. are grateful for financial support by the German Research Foundation (DFG research Grant DO 1580/5-1). D. D. is furthermore funded by the DFG under Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453). R. H. acknowledges funding by the Hannover School for Nanotechnology (HSN). A. W. is thankful for financial support by the Deutsche Bundesstiftung Umwelt (DBU) in the form of a Promotionsstipendium (no. 20017/484). The authors would also like to thank the Laboratory of Nano and Quantum Engineering (LNQE) for the use of the TEM, Armin Feldhoff and Jürgen Caro for the use of the XRD, Anja Schlosser for additional TEM measurements as well as Andreas Breuksch for his assistance during the synthesis of some of the nanoparticle batches and Sven Getschmann for his help with the photographs.
PY - 2019/8/15
Y1 - 2019/8/15
N2 - A dependence of the formation of tri-n-octylphosphine-capped Ni nanocrystals on the presence of halide ions during their synthesis is shown. For the application-oriented synthesis of Ni particles, this information can be crucial. Furthermore, Ni nanoparticles can be converted to nickel phosphide or sulphide by heating them up in the presence of a phosphorus or sulphur source, resulting in either solid or hollow nanocrystals, formed via the nanoscale Kirkendall effect, depending on the synthesis route. By adjusting the Ni crystallite size in the initial nanoparticles via the halide ion concentration the cavity size of the resulting hollow nanocrystals can be tuned, which is otherwise impossible to realise for particles of a similar total diameter by using this process. The synthesised hollow Ni3S2 nanocrystals exhibit a much sharper localised surface plasmon resonance (LSPR) band than all previously presented particles of this material, which is known to show molar extinction coefficients at the LSPR maximum similar to Au. This narrow linewidth could be explained by the nanoparticles' high crystallinity resulting from the Kirkendall process and is interesting for various possible optical applications such as surface-enhanced Raman spectroscopy owing to the low cost of the involved materials compared to the widely used noble metals.
AB - A dependence of the formation of tri-n-octylphosphine-capped Ni nanocrystals on the presence of halide ions during their synthesis is shown. For the application-oriented synthesis of Ni particles, this information can be crucial. Furthermore, Ni nanoparticles can be converted to nickel phosphide or sulphide by heating them up in the presence of a phosphorus or sulphur source, resulting in either solid or hollow nanocrystals, formed via the nanoscale Kirkendall effect, depending on the synthesis route. By adjusting the Ni crystallite size in the initial nanoparticles via the halide ion concentration the cavity size of the resulting hollow nanocrystals can be tuned, which is otherwise impossible to realise for particles of a similar total diameter by using this process. The synthesised hollow Ni3S2 nanocrystals exhibit a much sharper localised surface plasmon resonance (LSPR) band than all previously presented particles of this material, which is known to show molar extinction coefficients at the LSPR maximum similar to Au. This narrow linewidth could be explained by the nanoparticles' high crystallinity resulting from the Kirkendall process and is interesting for various possible optical applications such as surface-enhanced Raman spectroscopy owing to the low cost of the involved materials compared to the widely used noble metals.
UR - http://www.scopus.com/inward/record.url?scp=85070741753&partnerID=8YFLogxK
U2 - 10.1039/c9nr04187g
DO - 10.1039/c9nr04187g
M3 - Article
C2 - 31367715
AN - SCOPUS:85070741753
VL - 11
SP - 15104
EP - 15111
JO - NANOSCALE
JF - NANOSCALE
SN - 2040-3364
IS - 32
ER -