The structure of small, vapor-deposited particles. II. Experimental study of particles with hexagonal profile

M. J. Yacamán; K. Heinemann; C. Y. Yang; H. Poppa

doi:10.1016/0022-0248(79)90241-0

The structure of small, vapor-deposited particles. II. Experimental study of particles with hexagonal profile

M. J. Yacamán, K. Heinemann, C. Y. Yang, H. Poppa

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

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Abstract

"Multiply-twinned" gold particles with hexagonal bright field TEM profile were determined to be icosahedra composed of 20 identical and twin-related tetrahedral building units that do not have an fcc structure. The crystal structure of these slightly deformed tetrahedra is rhombohedral. Experimental evidence supporting this particle model was obtained by selected-zone dark field and weak beam dark field electron microscopy. In conjunction with the results of part I, it has been concluded that multiply- twinned gold particles of pentagonal or hexagonal profile that are found during the early stages of the vapor deposition growth process on alkali halide surfaces do not have an fcc crystal structure, which is in obvious contrast to the structure of bulk gold.

Original language	English (US)
Pages (from-to)	187-195
Number of pages	9
Journal	Journal of Crystal Growth
Volume	47
Issue number	2
DOIs	https://doi.org/10.1016/0022-0248(79)90241-0
State	Published - Aug 1979
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

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10.1016/0022-0248(79)90241-0

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title = "The structure of small, vapor-deposited particles. II. Experimental study of particles with hexagonal profile",

abstract = "{"}Multiply-twinned{"} gold particles with hexagonal bright field TEM profile were determined to be icosahedra composed of 20 identical and twin-related tetrahedral building units that do not have an fcc structure. The crystal structure of these slightly deformed tetrahedra is rhombohedral. Experimental evidence supporting this particle model was obtained by selected-zone dark field and weak beam dark field electron microscopy. In conjunction with the results of part I, it has been concluded that multiply- twinned gold particles of pentagonal or hexagonal profile that are found during the early stages of the vapor deposition growth process on alkali halide surfaces do not have an fcc crystal structure, which is in obvious contrast to the structure of bulk gold.",

author = "Yacam{\'a}n, {M. J.} and K. Heinemann and Yang, {C. Y.} and H. Poppa",

note = "Funding Information: Lake, California, for providing some of the vapor-deposit specimens used in this study. One of the authors (M.J.Y.) was holding a National Research Council Senior Research Associateship while on leave of absence from the Universidad Nacional Aut{\'o}noma de Mexico. Another author (C.Y.Y.) was holding a National Research Council Postdoctoral Research Associateship. Support through NASA Grant, NAS 2249 is acknowledged.",

year = "1979",

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doi = "10.1016/0022-0248(79)90241-0",

language = "English (US)",

volume = "47",

pages = "187--195",

journal = "Journal of Crystal Growth",

issn = "0022-0248",

publisher = "Elsevier",

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T1 - The structure of small, vapor-deposited particles. II. Experimental study of particles with hexagonal profile

AU - Yacamán, M. J.

AU - Heinemann, K.

AU - Yang, C. Y.

AU - Poppa, H.

N1 - Funding Information: Lake, California, for providing some of the vapor-deposit specimens used in this study. One of the authors (M.J.Y.) was holding a National Research Council Senior Research Associateship while on leave of absence from the Universidad Nacional Autónoma de Mexico. Another author (C.Y.Y.) was holding a National Research Council Postdoctoral Research Associateship. Support through NASA Grant, NAS 2249 is acknowledged.

PY - 1979/8

Y1 - 1979/8

N2 - "Multiply-twinned" gold particles with hexagonal bright field TEM profile were determined to be icosahedra composed of 20 identical and twin-related tetrahedral building units that do not have an fcc structure. The crystal structure of these slightly deformed tetrahedra is rhombohedral. Experimental evidence supporting this particle model was obtained by selected-zone dark field and weak beam dark field electron microscopy. In conjunction with the results of part I, it has been concluded that multiply- twinned gold particles of pentagonal or hexagonal profile that are found during the early stages of the vapor deposition growth process on alkali halide surfaces do not have an fcc crystal structure, which is in obvious contrast to the structure of bulk gold.

AB - "Multiply-twinned" gold particles with hexagonal bright field TEM profile were determined to be icosahedra composed of 20 identical and twin-related tetrahedral building units that do not have an fcc structure. The crystal structure of these slightly deformed tetrahedra is rhombohedral. Experimental evidence supporting this particle model was obtained by selected-zone dark field and weak beam dark field electron microscopy. In conjunction with the results of part I, it has been concluded that multiply- twinned gold particles of pentagonal or hexagonal profile that are found during the early stages of the vapor deposition growth process on alkali halide surfaces do not have an fcc crystal structure, which is in obvious contrast to the structure of bulk gold.

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The structure of small, vapor-deposited particles. II. Experimental study of particles with hexagonal profile

Abstract

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