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  4. Room temperature imprinting of water-based microparticulate inks for realizing glass microfluidic channels
 
research article

Room temperature imprinting of water-based microparticulate inks for realizing glass microfluidic channels

Haq, Muhammad Refatul
•
Mazinani, Babak  
•
Subramanian, Vivek  
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June 1, 2024
Materials & Design

The combination of imprinting and extrusion overprinting of composite glass materials offers a pathway for the fabrication of fully integrated functional microfluidic devices. Utilizing novel low -temperature phosphate glasses, originally developed for 3D extrusion printing, imprinting now has been achieved with soft stamps. The current hybrid process demonstrates superior resolution compared to previously reported extrusion techniques, presenting possibilities for applications such as open microfluidic channels that can subsequently be sealed by extrusion printing. The water-based microparticle glass-ink enables patterning at room temperature and its solidification occurring through water evaporation within the glass particle scaffold. Following the demolding, sintering is conducted at a temperature of 485°C, resulting in dense glass elements with porosity levels below 1 %. For straightforward microfluidic channel structures featuring channels ranging from 100-200 μm in width, the shape is fully preserved during demolding and sequential annealing. The shrinkage observed is almost isotropic. The channels were successfully tested in an open microfluidic setup and initial tests were performed with the closed channels.

  • Details
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Type
research article
DOI
10.1016/j.matdes.2024.112982
Web of Science ID

WOS:001238024600001

Author(s)
Haq, Muhammad Refatul
Mazinani, Babak  
Subramanian, Vivek  
Schift, Helmut
Date Issued

2024-06-01

Publisher

Elsevier Sci Ltd

Published in
Materials & Design
Volume

242

Article Number

112982

Subjects

Technology

•

Room Temperature Imprinting

•

Extrusion Printing

•

Overprinting

•

Sintering

•

Microparticulate Ink

•

Glass Microfluidics

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LAFT  
FunderGrant Number

ETH Board, Switzerland

Available on Infoscience
June 19, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/208732
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