Quantitative size-dependent structure and strain determination of CdSe nanoparticles using atomic pair distribution function analysis
By A. Masadeh, E. Bozin, Christopher Lyn Farrow, G. Paglia, Pavol Juhas, Simon J. L. Billinge, Abhijeet J. Karkamkar, M. Kanatzidis. 2007
166 citations recorded by the source corpus.
The size-dependent structure of CdSe nanoparticles, with diameters ranging from $2\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}4\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$, has been studied using the atomic pair distribution function (PDF) method. The core structure of the measured CdSe nanoparticles can be described in terms of the wurtzite atomic structure with extensive stacking faults. The density of faults in the nanoparticles is $\ensuremath{\sim}50%$. The diameter of the core region was extracted directly from the PDF data and is in good agreement with the diameter obtained from standard characterization methods, suggesting that there is little surface amorphous region. A compressive strain was measured in the Cd--Se bond length that increases with decreasing particle size being 0.5% with respect to bulk CdSe for the $2\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ diameter particles. This study demonstrates the size-dependent quantitative structural information that can be obtained even from very small nanoparticles using the PDF approach.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/25dfca2731200754e8338bd4163b28258308fb22
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In Electrical and Electronic Engineering
In Materials Chemistry
Citations in the corpus
- X-ray scattering characterisation of nanoparticles (2015, background): “[178] Spherical CdSe nanoparticles were found to have higher stacking fault densities than nanorods.”
- PDFgetX3: a rapid and highly automatable program for processing powder diffraction data into total scattering pair distribution functions (2012, background): “The nanoparticles in panels (b) and (c) were calculated to have diameters of 37 Å and 22 Å, respectively (Masadeh et al., 2007).”