Isolated and assembled silver aggregates on the Si(001) surface: The initial stage of film formation

Kai Huang; Xiaohang Huang; Jun Nogami

doi:10.1039/d0cp06353c

Isolated and assembled silver aggregates on the Si(001) surface: The initial stage of film formation

Kai Huang^*, Xiaohang Huang, Jun Nogami

^*Corresponding author for this work

Chemistry

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

4 Scopus citations

Abstract

We examined the dynamics of adsorption and the subsequent growth of submonolayered silver on Si(001) from 100 K to 230 K, using scanning tunneling microscopy and density functional theory. The dynamics is demonstrated to depend on substrate temperature, as described in the following three stages: (I) at 100-140 K, silver is adsorbed as isolated aggregates (regular-Ag₄, variant-Ag₄and Ag₂), in the absence of single silver adatoms. The spontaneous formation of silver aggregates arises from the hot-atom motion upon the initial impingement of individual silver atoms onto the Si(001) substrate. (II) At 140-190 K, the migration of isolated Ag-aggregates is sufficiently activated, leading to the formation of Ag-chains by surface polymerization. (III) At 190-230 K, there is implication that the Ag-chains become mobile on Si(001), en route to forming patches of 2×2 Ag-films by agglomeration.

Original language	English
Pages (from-to)	4161-4166
Number of pages	6
Journal	Physical Chemistry Chemical Physics
Volume	23
Issue number	7
DOIs	https://doi.org/10.1039/d0cp06353c
State	Published - 21 Feb 2021

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title = "Isolated and assembled silver aggregates on the Si(001) surface: The initial stage of film formation",

abstract = "We examined the dynamics of adsorption and the subsequent growth of submonolayered silver on Si(001) from 100 K to 230 K, using scanning tunneling microscopy and density functional theory. The dynamics is demonstrated to depend on substrate temperature, as described in the following three stages: (I) at 100-140 K, silver is adsorbed as isolated aggregates (regular-Ag4, variant-Ag4and Ag2), in the absence of single silver adatoms. The spontaneous formation of silver aggregates arises from the hot-atom motion upon the initial impingement of individual silver atoms onto the Si(001) substrate. (II) At 140-190 K, the migration of isolated Ag-aggregates is sufficiently activated, leading to the formation of Ag-chains by surface polymerization. (III) At 190-230 K, there is implication that the Ag-chains become mobile on Si(001), en route to forming patches of 2×2 Ag-films by agglomeration.",

author = "Kai Huang and Xiaohang Huang and Jun Nogami",

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T1 - Isolated and assembled silver aggregates on the Si(001) surface

T2 - The initial stage of film formation

AU - Huang, Kai

AU - Huang, Xiaohang

AU - Nogami, Jun

N1 - Publisher Copyright: © the Owner Societies 2021.

PY - 2021/2/21

Y1 - 2021/2/21

N2 - We examined the dynamics of adsorption and the subsequent growth of submonolayered silver on Si(001) from 100 K to 230 K, using scanning tunneling microscopy and density functional theory. The dynamics is demonstrated to depend on substrate temperature, as described in the following three stages: (I) at 100-140 K, silver is adsorbed as isolated aggregates (regular-Ag4, variant-Ag4and Ag2), in the absence of single silver adatoms. The spontaneous formation of silver aggregates arises from the hot-atom motion upon the initial impingement of individual silver atoms onto the Si(001) substrate. (II) At 140-190 K, the migration of isolated Ag-aggregates is sufficiently activated, leading to the formation of Ag-chains by surface polymerization. (III) At 190-230 K, there is implication that the Ag-chains become mobile on Si(001), en route to forming patches of 2×2 Ag-films by agglomeration.

AB - We examined the dynamics of adsorption and the subsequent growth of submonolayered silver on Si(001) from 100 K to 230 K, using scanning tunneling microscopy and density functional theory. The dynamics is demonstrated to depend on substrate temperature, as described in the following three stages: (I) at 100-140 K, silver is adsorbed as isolated aggregates (regular-Ag4, variant-Ag4and Ag2), in the absence of single silver adatoms. The spontaneous formation of silver aggregates arises from the hot-atom motion upon the initial impingement of individual silver atoms onto the Si(001) substrate. (II) At 140-190 K, the migration of isolated Ag-aggregates is sufficiently activated, leading to the formation of Ag-chains by surface polymerization. (III) At 190-230 K, there is implication that the Ag-chains become mobile on Si(001), en route to forming patches of 2×2 Ag-films by agglomeration.

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U2 - 10.1039/d0cp06353c

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AN - SCOPUS:85101687056

SN - 1463-9076

VL - 23

SP - 4161

EP - 4166

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 7

ER -

Isolated and assembled silver aggregates on the Si(001) surface: The initial stage of film formation

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