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Nanomaterials 2017, 7(5), 105; doi:10.3390/nano7050105

Direct Laser Writing of Magneto-Photonic Sub-Microstructures for Prospective Applications in Biomedical Engineering

1
Laboratoire de Photonique Quantique et Moléculaire, UMR 8537, École Normale Supérieure de Cachan, Centrale Supélec, CNRS, Université Paris-Saclay, 61 avenue de Président Wilson, 94235 Cachan, France
2
Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, 100000 Hanoi, Vietnam
3
Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, 100000 Hanoi, Vietnam
4
Department of Physics, University of South Florida, Tampa, FL 33620, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Thomas Nann
Received: 6 December 2016 / Revised: 2 May 2017 / Accepted: 4 May 2017 / Published: 9 May 2017
(This article belongs to the Special Issue Functional Magnetic Nanoparticles in Nanomedicine)
View Full-Text   |   Download PDF [5361 KB, uploaded 9 May 2017]   |  

Abstract

We report on the fabrication of desired magneto-photonic devices by a low one-photon absorption (LOPA) direct laser writing (DLW) technique on a photocurable nanocomposite consisting of magnetite ( Fe 3 O 4 ) nanoparticles and a commercial SU-8 photoresist. The magnetic nanocomposite was synthesized by mixing Fe 3 O 4 nanoparticles with different kinds of SU-8 photoresists. We demonstrated that the degree of dispersion of Fe 3 O 4 nanoparticles in the nanocomposite depended on the concentration of Fe 3 O 4 nanoparticles, the viscosity of SU-8 resist, and the mixing time. By tuning these parameters, the most homogeneous magnetic nanocomposite was obtained with a concentration of about 2 wt % of Fe 3 O 4 nanoparticles in SU-8 2005 photoresist for the mixing time of 20 days. The LOPA-based DLW technique was employed to fabricate on demand various magneto-photonic submicrometer structures, which are similar to those obtained without Fe 3 O 4 nanoparticles. The magneto-photonic 2D and 3D structures with sizes as small as 150 nm were created. We demonstrated the strong magnetic field responses of the magneto-photonic nanostructures and their use as micro-actuators when immersed in a liquid solution. View Full-Text
Keywords: magnetic nanocomposite; magneto-photonic microstructures; one-photon absorption direct laser writing magnetic nanocomposite; magneto-photonic microstructures; one-photon absorption direct laser writing
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MDPI and ACS Style

Au, T.H.; Trinh, D.T.; Tong, Q.C.; Do, D.B.; Nguyen, D.P.; Phan, M.-H.; Lai, N.D. Direct Laser Writing of Magneto-Photonic Sub-Microstructures for Prospective Applications in Biomedical Engineering. Nanomaterials 2017, 7, 105.

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