Growth kinetics of asymmetric Bi2S3 nanocrystals: Size distribution focusing in nanorods

Ibáñez M, Guardia P, Shavel A, Cadavid D, Arbiol J, Morante J, Cabot A. 2011. Growth kinetics of asymmetric Bi2S3 nanocrystals: Size distribution focusing in nanorods. Journal of Physical Chemistry C. 115(16), 7947–7955.

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Journal Article | Published | English
Author
Ibáñez , MariaIST Austria ; Guardia, Pablo; Shavel, Alexey; Cadavid, Doris; Arbiol, Jordi; Morante, Joan; Cabot, Andreu
Abstract
The growth kinetics of colloidal Bi2S3 nanorods was investigated. After nucleation, the length distribution of the growing Bi 2S3 nanorods narrows with the reaction time until a bimodal length distribution appears. From this critical reaction time on, the smallest nanorods of the ensemble dissolve, feeding with monomer the growth of the largest ones. A comprehensive characterization of the size-distribution evolution of Bi2S3 nanorods is used here to illustrate the dependences of the anisotropic growth rates of cylindrical nanoparticles on the nanoparticle dimensions and the monomer concentration in solution. With this goal in mind, a diffusion-reaction model is presented to explain the origin of the experimentally obtained length distribution focusing mechanism. The model is able to reproduce the decrease of the growth rate in the nanorod axial direction with both its thickness and length. On the other hand, low lateral reaction rates prevent the nanorod thickness distribution to be focused. In both crystallographic growth directions, a concentration-dependent critical thickness exists, which discriminates between nanorods with positive growth rates and those dissolving in the reaction solution.
Publishing Year
Date Published
2011-04-28
Journal Title
Journal of Physical Chemistry C
Acknowledgement
This work was supported by the Spanish MICINN Projects MAT2008-05779, MAT2008-03400-E/MAT, and ENE2008-03277-E/CON. Maria Ibáñez thanks the Ph.D. grant from the Spanish MICINN.
Volume
115
Issue
16
Page
7947 - 7955
IST-REx-ID
336

Cite this

Ibáñez M, Guardia P, Shavel A, et al. Growth kinetics of asymmetric Bi2S3 nanocrystals: Size distribution focusing in nanorods. Journal of Physical Chemistry C. 2011;115(16):7947-7955. doi:10.1021/jp2002904
Ibáñez, M., Guardia, P., Shavel, A., Cadavid, D., Arbiol, J., Morante, J., & Cabot, A. (2011). Growth kinetics of asymmetric Bi2S3 nanocrystals: Size distribution focusing in nanorods. Journal of Physical Chemistry C. American Chemical Society. https://doi.org/10.1021/jp2002904
Ibáñez, Maria, Pablo Guardia, Alexey Shavel, Doris Cadavid, Jordi Arbiol, Joan Morante, and Andreu Cabot. “Growth Kinetics of Asymmetric Bi2S3 Nanocrystals: Size Distribution Focusing in Nanorods.” Journal of Physical Chemistry C. American Chemical Society, 2011. https://doi.org/10.1021/jp2002904.
M. Ibáñez et al., “Growth kinetics of asymmetric Bi2S3 nanocrystals: Size distribution focusing in nanorods,” Journal of Physical Chemistry C, vol. 115, no. 16. American Chemical Society, pp. 7947–7955, 2011.
Ibáñez M, Guardia P, Shavel A, Cadavid D, Arbiol J, Morante J, Cabot A. 2011. Growth kinetics of asymmetric Bi2S3 nanocrystals: Size distribution focusing in nanorods. Journal of Physical Chemistry C. 115(16), 7947–7955.
Ibáñez, Maria, et al. “Growth Kinetics of Asymmetric Bi2S3 Nanocrystals: Size Distribution Focusing in Nanorods.” Journal of Physical Chemistry C, vol. 115, no. 16, American Chemical Society, 2011, pp. 7947–55, doi:10.1021/jp2002904.

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