NDLI: Pushing the limits of photo-curable SU-8-based superparamagnetic polymer composites

Content Provider	IEEE Xplore Digital Library
Author	Peters, C. Ergeneman, O. Sotiriou, G.A. Pratsinis, S.E. Nelson, B.J. Hierold, C.
Copyright Year	2013
Description	Author affiliation: Particle Technol. Lab., ETH Zurich, Zurich, Switzerland (Sotiriou, G.A.; Pratsinis, S.E.) \|\| Micro & Nanosyst., ETH Zurich, Zurich, Switzerland (Peters, C.; Hierold, C.) \|\| Inst. of Robot. & Intell. Syst., ETH Zurich, Zurich, Switzerland (Ergeneman, O.; Nelson, B.J.)
Abstract	We present a facile method to extend the particle-induced exposure depth limitation in SU-8-based superparamagnetic polymer composites (SPMPCs) by adding H-Nu 470 photo initiator (PI). While superparamagnetic magnetite particles strongly absorb i-line radiation required to crosslink SU-8, H-Nu 470 expands the photosensitivity of the resist towards the visible spectrum, where the composite is more transparent. Using the g-line emission of a mercury short-arc lamp we are able to increase the exposure depth from 5.3 μm to 11.6 μm for a 5 %vol composite and for the first time expose a 10 %vol composite with a depth (thickness) of 5.6 μm. In comparison to i-line sensitive SPMPCs, the proposed PI enables crosslinking films with a 2.2-fold magnetization while maintaining a homogeneous particle distribution.
Starting Page	2676
Ending Page	2679
File Size	489953
Page Count	4
File Format	PDF
ISBN	9781467359832
ISSN	21641641
DOI	10.1109/Transducers.2013.6627357
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-16
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Absorption Polymers Films Nanoparticles Saturation magnetization Resists Magnetization photocuring Superparamagnetic composite visible light curing H-Nu 470 SU-8 magnetite nanoparticles
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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