Ta, VD, Carter, RM, Esenturk, E et al. (7 more authors) (2016) Dynamically controlled deposition of colloidal nanoparticles suspension in evaporating drops using laser radiation. Soft Matter, 12 (20). pp. 4530-4536. ISSN 1744-683X
Abstract
Dynamic control of the distribution of polystyrene suspended nanoparticles in evaporating droplets is investigated using a 2.9 μm high power laser. Under laser radiation a droplet is locally heated and fluid flows are induced that overcome the capillary flow, and thus a reversal of the coffee-stain effect is observed. Suspension particles are accumulated in a localised area, one order of magnitude smaller than the original droplet size. By scanning the laser beam over the droplet, particles can be deposited in an arbitrary pattern. This finding raises the possibility for direct laser writing of suspended particles through a liquid layer. Furthermore, a highly uniform coating is possible by manipulating the laser beam diameter and exposure time. The effect is expected to be universally applicable to aqueous solutions independent of solutes (either particles or molecules) and deposited substrates.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, The Royal Society of Chemistry. This is an open access article licensed under a Creative Commons Attribution 3.0 Unported Licence. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Future Manufacturing Processes (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 10 Jun 2016 10:08 |
Last Modified: | 27 Mar 2019 11:26 |
Published Version: | http://dx.doi.org/10.1039/C6SM00465B |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Identification Number: | 10.1039/C6SM00465B |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:100724 |