Yeung, K.W. (2020) [Nanotechnology Reviews] Printability of photo-sensitive nanocomposites using two-photon_ polymerization.pdf (1.35 MB)
Printability of photo-sensitive nanocomposites using two-photon polymerization
journal contribution
posted on 2020-06-08, 09:07 authored by Ka-Wai Yeung, Yuqing Dong, Ling Chen, Chak-Yin Tang, Wing-Cheung Law, Gary Chi-Pong Tsui, Daniel EngstromDaniel EngstromAbstractTwo-photon polymerization direct laser writing (TPP DLW) is an emerging technology
for producing advanced functional devices with complex three-dimensional (3D)
micro-structures. Tremendous efforts have been devoted to developing two-photon
polymerizable photo-sensitive nanocomposites with tailored properties. Light-induced
reconfigurable smart materials such as liquid crystalline elastomers (LCEs) are
promising materials. However, due to the difficulties in designing two-photon
polymerizable liquid crystal monomer (LCM) nanocomposite photoresists, it is
challenging to fabricate true 3D LCE micro-structures. In this paper, we report the
preparation of photo-sensitive LCE nanocomposites containing photothermal
nanomaterials, including multiwalled carbon nanotubes, graphene oxide and gold
nanorods (AuNRs), for TPP DLW. The printability of the LCE nanocomposites is assessed
by the fidelity of the micro-structures under different laser writing conditions. DLW
of GO/LCM photoresist has shown a vigorous bubble formation. This may be due to the
excessive heat generation upon rapid energy absorption of 780 nm laser energy.
Compared to pure LCM photoresists, AuNR/LCM photoresists have a lower laser intensity
threshold and higher critical laser scanning speed, due to the high absorption of
AuNRs at 780 nm, which enhanced the photo-sensitivity of the photoresist.
Therefore, a shorter printing time can be achieved for the AuNR/LCM photoresist.
Funding
Synthesizing 3D METAmaterials for RF, microwave and THz applications (SYMETA) : EP/N010493/1
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
Nanotechnology ReviewsVolume
9Issue
1Pages
418 - 426Publisher
Walter de Gruyter GmbHVersion
- VoR (Version of Record)
Rights holder
© The authorsPublisher statement
This is an Open Access Article. It is published by Walter de Gruyter under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/Acceptance date
2020-01-04Publication date
2020-05-15Copyright date
2020eISSN
2191-9097Publisher version
Language
- en
Depositor
Dr Daniel Engstrom . Deposit date: 5 June 2020Usage metrics
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