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  4. Cell-Imprint Surface Modification by Contact Photolithography-Based Approaches: Direct-Cell Photolithography and Optical Soft Lithography Using PDMS Cell Imprints
 
research article

Cell-Imprint Surface Modification by Contact Photolithography-Based Approaches: Direct-Cell Photolithography and Optical Soft Lithography Using PDMS Cell Imprints

Kavand, Hanie
•
van Lintel, Harald  
•
Sichani, Soroush Bakhshi
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March 20, 2019
ACS Applied Materials & Interfaces

New cell-imprint surface modification techniques based on direct-cell photolithography and optical soft lithography using poly(dimethylsiloxane) (PDMS) cell imprints are presented for enhanced cell-based studies. The core concept of engineering materials for cell-based studies is the material's ability to redesign the physicochemical characteristics of the cellular niche. There is a growing interest in direct molding from cells (cell imprinting). These negative copies of cell surface topographies have been shown to affect cell shape and direct mesenchymal stem cells' differentiation. Analyzing the results is however challenging as cells seeded on these substrates do not always end up in a cell pattern, which leads to decreased effectiveness and biased quantification. To gain control over cell seeding into the patterns and avoid unwanted cell population outside the cell-imprinted surface needs to be modified. From this perspective, the standard optical contact lithography process was modified and cells were introduced to the cleanroom. Direct-cell photolithography was used for a single-step PDMS cell-imprint (chondrocytes as the molding template) surface modification down to single-cell (approximately 5 mu m in diameter) resolution. As cells come in a variety of shapes, sizes, and optical profiles, a complementary optical soft lithography-based photomask fabrication technique is also reported. The simplicity of the fabrication process makes this cell-imprint surface modification technique compatible with any adherent cell type and leads to efficient cell-based studies.

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Type
research article
DOI
10.1021/acsami.9b00523
Web of Science ID

WOS:000462260000013

Author(s)
Kavand, Hanie
van Lintel, Harald  
Sichani, Soroush Bakhshi
Bonakdar, Shahin
Kavand, Hamed
Koohsorkhi, Javad
Renaud, Philippe  
Date Issued

2019-03-20

Publisher

AMER CHEMICAL SOC

Published in
ACS Applied Materials & Interfaces
Volume

11

Issue

11

Start page

10559

End page

10566

Subjects

Nanoscience & Nanotechnology

•

Materials Science, Multidisciplinary

•

Science & Technology - Other Topics

•

Materials Science

•

surface modification

•

cell-imprint

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direct-cell photolithography

•

cell mask

•

optical soft lithography

•

recognition

•

coatings

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMIS4  
Available on Infoscience
June 18, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/157526
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