Nanorods versus nanospheres: A bifurcation mechanism revealed by principal component TEM analysis

Fabien Hubert; Fabienne Testard; Giancarlo Rizza; Olivier Spalla

doi:10.1021/la100843k

Nanorods versus nanospheres: A bifurcation mechanism revealed by principal component TEM analysis

Fabien Hubert
, Fabienne Testard
, Giancarlo Rizza
, Olivier Spalla

Research output: Contribution to journal › Article › peer-review

Abstract

A quantitative analysis of object populations obtained by TEM images is performed for the classical scheme of aqueous seedless synthesis of nanorods. Using an effective way to represent nanoparticle size distributions, we unravel that spheres, usually considered to be a side-product, are in fact coming from a competing route during nanorod formation. The differentiation between spheres and rods appears above a critical size of 5 nm and is due to different growth rates between faces. The initial repartition of faces on nuclei or on the nanoparticles at the critical size can be the source for the final differentiation between globules and rods. The efficiency of the selection is strongly influenced by the production of the initial seeds and, in particular, by the amount of borohydride added in the present scheme.

Original language	English
Pages (from-to)	6887-6891
Number of pages	5
Journal	Langmuir
Volume	26
Issue number	10
DOIs	https://doi.org/10.1021/la100843k
Publication status	Published - 18 May 2010
Externally published	Yes

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10.1021/la100843k

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title = "Nanorods versus nanospheres: A bifurcation mechanism revealed by principal component TEM analysis",

abstract = "A quantitative analysis of object populations obtained by TEM images is performed for the classical scheme of aqueous seedless synthesis of nanorods. Using an effective way to represent nanoparticle size distributions, we unravel that spheres, usually considered to be a side-product, are in fact coming from a competing route during nanorod formation. The differentiation between spheres and rods appears above a critical size of 5 nm and is due to different growth rates between faces. The initial repartition of faces on nuclei or on the nanoparticles at the critical size can be the source for the final differentiation between globules and rods. The efficiency of the selection is strongly influenced by the production of the initial seeds and, in particular, by the amount of borohydride added in the present scheme.",

author = "Fabien Hubert and Fabienne Testard and Giancarlo Rizza and Olivier Spalla",

year = "2010",

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doi = "10.1021/la100843k",

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T2 - A bifurcation mechanism revealed by principal component TEM analysis

AU - Hubert, Fabien

AU - Testard, Fabienne

AU - Rizza, Giancarlo

AU - Spalla, Olivier

PY - 2010/5/18

Y1 - 2010/5/18

N2 - A quantitative analysis of object populations obtained by TEM images is performed for the classical scheme of aqueous seedless synthesis of nanorods. Using an effective way to represent nanoparticle size distributions, we unravel that spheres, usually considered to be a side-product, are in fact coming from a competing route during nanorod formation. The differentiation between spheres and rods appears above a critical size of 5 nm and is due to different growth rates between faces. The initial repartition of faces on nuclei or on the nanoparticles at the critical size can be the source for the final differentiation between globules and rods. The efficiency of the selection is strongly influenced by the production of the initial seeds and, in particular, by the amount of borohydride added in the present scheme.

AB - A quantitative analysis of object populations obtained by TEM images is performed for the classical scheme of aqueous seedless synthesis of nanorods. Using an effective way to represent nanoparticle size distributions, we unravel that spheres, usually considered to be a side-product, are in fact coming from a competing route during nanorod formation. The differentiation between spheres and rods appears above a critical size of 5 nm and is due to different growth rates between faces. The initial repartition of faces on nuclei or on the nanoparticles at the critical size can be the source for the final differentiation between globules and rods. The efficiency of the selection is strongly influenced by the production of the initial seeds and, in particular, by the amount of borohydride added in the present scheme.

U2 - 10.1021/la100843k

DO - 10.1021/la100843k

M3 - Article

C2 - 20405865

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SN - 0743-7463

VL - 26

SP - 6887

EP - 6891

JO - Langmuir

JF - Langmuir

IS - 10

ER -

Nanorods versus nanospheres: A bifurcation mechanism revealed by principal component TEM analysis

Abstract

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