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Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying

M. Majumder, C. Rendall, A. Eukel, J. Wang, N. Behabtu, C. Pint, T.Y. Liu, A. Orbaek, F. Mirri, J. Nam, A. Barron, R. Pasquali, K. Howard, Pasquali Matteo, Alvin Orbaek White Orcid Logo

The Journal of Physical Chemistry B, Volume: 116, Issue: 22, Pages: 6536 - 6542

Swansea University Author: Alvin Orbaek White Orcid Logo

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DOI (Published version): 10.1021/jp3009628

Abstract

Attempts at depositing uniform films of nanoparticles by drop-drying have been frustrated by the “coffee-stain” effect due to convective macroscopic flow into the contact line. Here, we show that uniform deposition of nanoparticles in aqueous suspensions can be attained easily by drying the droplet...

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Published in: The Journal of Physical Chemistry B
ISSN: 1520-6106 1520-5207
Published: American Chemical Society ($lbrace$ACS$rbrace$) 2012
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URI: https://cronfa.swan.ac.uk/Record/cronfa32806
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spelling 2018-05-16T14:18:42.3686026 v2 32806 2017-03-29 Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying 8414a23650d4403fdfe1a735dbd2e24e 0000-0001-6338-5970 Alvin Orbaek White Alvin Orbaek White true false 2017-03-29 CHEG Attempts at depositing uniform films of nanoparticles by drop-drying have been frustrated by the “coffee-stain” effect due to convective macroscopic flow into the contact line. Here, we show that uniform deposition of nanoparticles in aqueous suspensions can be attained easily by drying the droplet in an ethanol vapor atmosphere. This technique allows the particle-laden water droplets to spread on a variety of surfaces such as glass, silicon, mica, PDMS, and even Teflon. Visualization of droplet shape and internal flow shows initial droplet spreading and strong recirculating flow during spreading and shrinkage. The initial spreading is due to a diminishing contact angle from the absorption of ethanol from the vapor at the contact line. During the drying phase, the vapor is saturated in ethanol, leading to preferential evaporation of water at the contact line. This generates a surface tension gradient that drives a strong recirculating flow and homogenizes the nanoparticle concentration. We show that this method can be used for depositing catalyst nanoparticles for the growth of single-walled carbon nanotubes as well as to manufacture plasmonic films of well-spaced, unaggregated gold nanoparticles. Journal Article The Journal of Physical Chemistry B 116 22 6536 6542 American Chemical Society ($lbrace$ACS$rbrace$) 1520-6106 1520-5207 7 6 2012 2012-06-07 10.1021/jp3009628 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2018-05-16T14:18:42.3686026 2017-03-29T14:46:42.2665929 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering M. Majumder 1 C. Rendall 2 A. Eukel 3 J. Wang 4 N. Behabtu 5 C. Pint 6 T.Y. Liu 7 A. Orbaek 8 F. Mirri 9 J. Nam 10 A. Barron 11 R. Pasquali 12 K. Howard 13 Pasquali Matteo 14 Alvin Orbaek White 0000-0001-6338-5970 15
title Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying
spellingShingle Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying
Alvin Orbaek White
title_short Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying
title_full Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying
title_fullStr Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying
title_full_unstemmed Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying
title_sort Overcoming the “Coffee-Stain” Effect by Compositional Marangoni-Flow-Assisted Drop-Drying
author_id_str_mv 8414a23650d4403fdfe1a735dbd2e24e
author_id_fullname_str_mv 8414a23650d4403fdfe1a735dbd2e24e_***_Alvin Orbaek White
author Alvin Orbaek White
author2 M. Majumder
C. Rendall
A. Eukel
J. Wang
N. Behabtu
C. Pint
T.Y. Liu
A. Orbaek
F. Mirri
J. Nam
A. Barron
R. Pasquali
K. Howard
Pasquali Matteo
Alvin Orbaek White
format Journal article
container_title The Journal of Physical Chemistry B
container_volume 116
container_issue 22
container_start_page 6536
publishDate 2012
institution Swansea University
issn 1520-6106
1520-5207
doi_str_mv 10.1021/jp3009628
publisher American Chemical Society ($lbrace$ACS$rbrace$)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 0
active_str 0
description Attempts at depositing uniform films of nanoparticles by drop-drying have been frustrated by the “coffee-stain” effect due to convective macroscopic flow into the contact line. Here, we show that uniform deposition of nanoparticles in aqueous suspensions can be attained easily by drying the droplet in an ethanol vapor atmosphere. This technique allows the particle-laden water droplets to spread on a variety of surfaces such as glass, silicon, mica, PDMS, and even Teflon. Visualization of droplet shape and internal flow shows initial droplet spreading and strong recirculating flow during spreading and shrinkage. The initial spreading is due to a diminishing contact angle from the absorption of ethanol from the vapor at the contact line. During the drying phase, the vapor is saturated in ethanol, leading to preferential evaporation of water at the contact line. This generates a surface tension gradient that drives a strong recirculating flow and homogenizes the nanoparticle concentration. We show that this method can be used for depositing catalyst nanoparticles for the growth of single-walled carbon nanotubes as well as to manufacture plasmonic films of well-spaced, unaggregated gold nanoparticles.
published_date 2012-06-07T03:40:19Z
_version_ 1763751828857552896
score 11.012678

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