Real-time observation of nucleation and growth of Au on CdSe quantum dot templates

Neelima Paul; Junyu Huang; Chang Liu; Taidong Lin; Chenghao Ouyang; Zhaoyu Liu; Chunfeng Chen; Zhongyi Chen; Zhiyin Weng; Matthias Schwartzkopf; Stephan V. Roth; Peter Müller-Buschbaum; Amitesh Paul

doi:10.1038/s41598-021-97485-z

Real-time observation of nucleation and growth of Au on CdSe quantum dot templates

Neelima Paul, Junyu Huang, Chang Liu, Taidong Lin, Chenghao Ouyang, Zhaoyu Liu, Chunfeng Chen, Zhongyi Chen, Zhiyin Weng, Matthias Schwartzkopf, Stephan V. Roth, Peter Müller-Buschbaum, Amitesh Paul^*

^*Corresponding author for this work

Materials Science and Engineering

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

Abstract

Semiconductor quantum dot (QD) arrays can be useful for optical devices such as lasers, solar cells and light-emitting diodes. As the size distribution influences the band-gap, it is worthwhile to investigate QDs prepared using different solvents because each of them could influence the overall morphology differently, depending on the ligand network around individual QDs. Here, we follow the nucleation and growth of gold (Au) on CdSe QD arrays to investigate the influence of surface ligands and thereby realized interparticle distance between QDs on Au growth behaviour. We particularly emphasize on the monolayer stage as the Au decoration on individual QDs is expected at this stage. Therefore, we sputter-deposit Au on each QD array to investigate the morphological evolution in real-time using time-resolved grazing-incidence small-angle X-ray scattering (GISAXS). The growth kinetics - independent of the template - signifies that the observed template-mediated nucleation is limited only to the very first few monolayers. Delicate changes in the Au growth morphology are seen in the immediate steps following the initial replicated decoration of the QD arrays. This is followed by a subsequent clustering and finally a complete Au coverage of the QD arrays.

Original language	English
Article number	18777
Journal	Scientific Reports
Volume	11
Issue number	1
DOIs	https://doi.org/10.1038/s41598-021-97485-z
State	Published - Dec 2021

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@article{e1bc7b85a4494f8b93ed2c97f802c2c9,

title = "Real-time observation of nucleation and growth of Au on CdSe quantum dot templates",

abstract = "Semiconductor quantum dot (QD) arrays can be useful for optical devices such as lasers, solar cells and light-emitting diodes. As the size distribution influences the band-gap, it is worthwhile to investigate QDs prepared using different solvents because each of them could influence the overall morphology differently, depending on the ligand network around individual QDs. Here, we follow the nucleation and growth of gold (Au) on CdSe QD arrays to investigate the influence of surface ligands and thereby realized interparticle distance between QDs on Au growth behaviour. We particularly emphasize on the monolayer stage as the Au decoration on individual QDs is expected at this stage. Therefore, we sputter-deposit Au on each QD array to investigate the morphological evolution in real-time using time-resolved grazing-incidence small-angle X-ray scattering (GISAXS). The growth kinetics - independent of the template - signifies that the observed template-mediated nucleation is limited only to the very first few monolayers. Delicate changes in the Au growth morphology are seen in the immediate steps following the initial replicated decoration of the QD arrays. This is followed by a subsequent clustering and finally a complete Au coverage of the QD arrays.",

author = "Neelima Paul and Junyu Huang and Chang Liu and Taidong Lin and Chenghao Ouyang and Zhaoyu Liu and Chunfeng Chen and Zhongyi Chen and Zhiyin Weng and Matthias Schwartzkopf and Roth, {Stephan V.} and Peter M{\"u}ller-Buschbaum and Amitesh Paul",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

month = dec,

doi = "10.1038/s41598-021-97485-z",

language = "英语",

volume = "11",

journal = "Scientific Reports",

issn = "2045-2322",

publisher = "Nature Publishing Group",

number = "1",

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Real-time observation of nucleation and growth of Au on CdSe quantum dot templates. / Paul, Neelima; Huang, Junyu; Liu, Chang; Lin, Taidong; Ouyang, Chenghao; Liu, Zhaoyu; Chen, Chunfeng; Chen, Zhongyi; Weng, Zhiyin; Schwartzkopf, Matthias; Roth, Stephan V.; Müller-Buschbaum, Peter; Paul, Amitesh.

In: Scientific Reports, Vol. 11, No. 1, 18777, 12.2021.

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

TY - JOUR

T1 - Real-time observation of nucleation and growth of Au on CdSe quantum dot templates

AU - Paul, Neelima

AU - Huang, Junyu

AU - Liu, Chang

AU - Lin, Taidong

AU - Ouyang, Chenghao

AU - Liu, Zhaoyu

AU - Chen, Chunfeng

AU - Chen, Zhongyi

AU - Weng, Zhiyin

AU - Schwartzkopf, Matthias

AU - Roth, Stephan V.

AU - Müller-Buschbaum, Peter

AU - Paul, Amitesh

PY - 2021/12

Y1 - 2021/12

N2 - Semiconductor quantum dot (QD) arrays can be useful for optical devices such as lasers, solar cells and light-emitting diodes. As the size distribution influences the band-gap, it is worthwhile to investigate QDs prepared using different solvents because each of them could influence the overall morphology differently, depending on the ligand network around individual QDs. Here, we follow the nucleation and growth of gold (Au) on CdSe QD arrays to investigate the influence of surface ligands and thereby realized interparticle distance between QDs on Au growth behaviour. We particularly emphasize on the monolayer stage as the Au decoration on individual QDs is expected at this stage. Therefore, we sputter-deposit Au on each QD array to investigate the morphological evolution in real-time using time-resolved grazing-incidence small-angle X-ray scattering (GISAXS). The growth kinetics - independent of the template - signifies that the observed template-mediated nucleation is limited only to the very first few monolayers. Delicate changes in the Au growth morphology are seen in the immediate steps following the initial replicated decoration of the QD arrays. This is followed by a subsequent clustering and finally a complete Au coverage of the QD arrays.

AB - Semiconductor quantum dot (QD) arrays can be useful for optical devices such as lasers, solar cells and light-emitting diodes. As the size distribution influences the band-gap, it is worthwhile to investigate QDs prepared using different solvents because each of them could influence the overall morphology differently, depending on the ligand network around individual QDs. Here, we follow the nucleation and growth of gold (Au) on CdSe QD arrays to investigate the influence of surface ligands and thereby realized interparticle distance between QDs on Au growth behaviour. We particularly emphasize on the monolayer stage as the Au decoration on individual QDs is expected at this stage. Therefore, we sputter-deposit Au on each QD array to investigate the morphological evolution in real-time using time-resolved grazing-incidence small-angle X-ray scattering (GISAXS). The growth kinetics - independent of the template - signifies that the observed template-mediated nucleation is limited only to the very first few monolayers. Delicate changes in the Au growth morphology are seen in the immediate steps following the initial replicated decoration of the QD arrays. This is followed by a subsequent clustering and finally a complete Au coverage of the QD arrays.

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JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 18777

ER -

Real-time observation of nucleation and growth of Au on CdSe quantum dot templates

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