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Enhanced physicochemical properties of polydimethylsiloxane based microfluidic devices and thin films by incorporating synthetic micro-diamond

Citation

Waheed, S and Cabot, JM and Macdonald, NP and Kalsoom, U and Farajikhah, S and Innis, PC and Nesterenko, PN and Lewis, TW and Breadmore, MC and Paull, B, Enhanced physicochemical properties of polydimethylsiloxane based microfluidic devices and thin films by incorporating synthetic micro-diamond, Scientific Reports, 7, (1) Article 15109. ISSN 2045-2322 (2017) [Refereed Article]


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Copyright 2017 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1038/s41598-017-15408-3

Abstract

Synthetic micro-diamond-polydimethylsiloxane (PDMS) composite microfluidic chips and thin films were produced using indirect 3D printing and spin coating fabrication techniques. Microfluidic chips containing up to 60 wt% micro-diamond were successfully cast and bonded. Physicochemical properties, including the dispersion pattern, hydrophobicity, chemical structure, elasticity and thermal characteristics of both chip and films were investigated. Scanning electron microscopy indicated that the micro-diamond particles were embedded and interconnected within the bulk material of the cast microfluidic chip, whereas in the case of thin films their increased presence at the polymer surface resulted in a reduced hydrophobicity of the composite. The elastic modulus increased from 1.28 for a PDMS control, to 4.42 MPa for the 60 wt% composite, along with a three-fold increase in thermal conductivity, from 0.15 to 0.45 W m−1 K−1. Within the fluidic chips, micro-diamond incorporation enhanced heat dissipation by efficient transfer of heat from within the channels to the surrounding substrate. At a flow rate of 1000 μL/min, the gradient achieved for the 60 wt% composite chip equalled a 9.8 C drop across a 3 cm long channel, more than twice that observed with the PDMS control chip.

Item Details

Item Type:Refereed Article
Keywords:diamond, polydimethylsiloxane, microchip, heat dissipation
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Separation Science
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
UTAS Author:Waheed, S (Ms Sidra Waheed)
UTAS Author:Cabot, JM (Dr Joan Cabot Canyelles)
UTAS Author:Macdonald, NP (Dr Niall Macdonald)
UTAS Author:Kalsoom, U (Ms Umme Kalsoom)
UTAS Author:Nesterenko, PN (Professor Pavel Nesterenko)
UTAS Author:Lewis, TW (Dr Trevor Lewis)
UTAS Author:Breadmore, MC (Professor Michael Breadmore)
UTAS Author:Paull, B (Professor Brett Paull)
ID Code:123236
Year Published:2017
Web of Science® Times Cited:9
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2017-12-21
Last Modified:2018-03-28
Downloads:22 View Download Statistics

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