Determination of nanocluster sizes from dark-field scanning transmission electron microscopy images

Norihiko L. Okamoto; Bryan W. Reed; Shareghe Mehraeen; Apoorva Kulkarni; David Gene Morgan; Bruce C. Gates; Nigel D. Brownings

doi:10.1021/jp710959x

Determination of nanocluster sizes from dark-field scanning transmission electron microscopy images

Norihiko L. Okamoto, Bryan W. Reed, Shareghe Mehraeen, Apoorva Kulkarni, David Gene Morgan, Bruce C. Gates, Nigel D. Brownings

IMR - Materials Development Division

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

21 Citations (Scopus)

Abstract

A novel method of determining nanocluster sizes and size distributions using high-angle annular dark-field imaging in scanning transmission electron microscopy is described. This method is demonstrated for MgO-supported [Os ₁₀C(CO)₂₄]^2- clusters formed by treating Os₃(CO)₁₂ precursors in CO. The image analysis identified the presence of both Os₃(CO)₁₂ precursors and [Os ₁₀C(CO)₂₄]^2- clusters in the expected ratio (with the sizes matching those calculated on the basis of their crystallographically determined structures within 6%) and also larger clusters that can be readily identified as combinations of the former clusters.

Original language	English
Pages (from-to)	1759-1763
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	6
DOIs	https://doi.org/10.1021/jp710959x
Publication status	Published - 2008 Feb 14

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title = "Determination of nanocluster sizes from dark-field scanning transmission electron microscopy images",

abstract = "A novel method of determining nanocluster sizes and size distributions using high-angle annular dark-field imaging in scanning transmission electron microscopy is described. This method is demonstrated for MgO-supported [Os 10C(CO)24]2- clusters formed by treating Os3(CO)12 precursors in CO. The image analysis identified the presence of both Os3(CO)12 precursors and [Os 10C(CO)24]2- clusters in the expected ratio (with the sizes matching those calculated on the basis of their crystallographically determined structures within 6%) and also larger clusters that can be readily identified as combinations of the former clusters.",

author = "Okamoto, {Norihiko L.} and Reed, {Bryan W.} and Shareghe Mehraeen and Apoorva Kulkarni and Morgan, {David Gene} and Gates, {Bruce C.} and Brownings, {Nigel D.}",

year = "2008",

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AU - Okamoto, Norihiko L.

AU - Reed, Bryan W.

AU - Mehraeen, Shareghe

AU - Kulkarni, Apoorva

AU - Morgan, David Gene

AU - Gates, Bruce C.

AU - Brownings, Nigel D.

PY - 2008/2/14

Y1 - 2008/2/14

N2 - A novel method of determining nanocluster sizes and size distributions using high-angle annular dark-field imaging in scanning transmission electron microscopy is described. This method is demonstrated for MgO-supported [Os 10C(CO)24]2- clusters formed by treating Os3(CO)12 precursors in CO. The image analysis identified the presence of both Os3(CO)12 precursors and [Os 10C(CO)24]2- clusters in the expected ratio (with the sizes matching those calculated on the basis of their crystallographically determined structures within 6%) and also larger clusters that can be readily identified as combinations of the former clusters.

AB - A novel method of determining nanocluster sizes and size distributions using high-angle annular dark-field imaging in scanning transmission electron microscopy is described. This method is demonstrated for MgO-supported [Os 10C(CO)24]2- clusters formed by treating Os3(CO)12 precursors in CO. The image analysis identified the presence of both Os3(CO)12 precursors and [Os 10C(CO)24]2- clusters in the expected ratio (with the sizes matching those calculated on the basis of their crystallographically determined structures within 6%) and also larger clusters that can be readily identified as combinations of the former clusters.

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Determination of nanocluster sizes from dark-field scanning transmission electron microscopy images

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