A new approach is developed to fabricate highly oriented mono-domain LCE nano/microstructures through micro-molding in capillaries. Gratings and microwires as two typical examples are fabricated and characterized by polarizing optical microscopy, optical microscopy, and scanning electron microscopy. The gratings with precisely controlled sizes and smooth surface are obtained by filling the channels with a nematic monomer mixture followed by the photo-crosslinking. After peeling off the gratings from the substrate, the free-standing microwires are obtained. A uniform orientation of the mesogenic units is observed for the molds with channel width less than 20 μm. Reversible thermomechanical effect is demonstrated by using the microwires obtained through this approach.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/marc.201200667 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Engineering polymer MEMS using combined microfluidic pervaporation and micro-molding.
Microsyst Nanoeng
July 2018
2Centre National de Recherche Scientifique, University of Bordeaux, Solvay, LOF, UMR 5258, 33600 Pessac, France.
In view of the extensive increase of flexible devices and wearable electronics, the development of polymer micro-electro-mechanical systems (MEMS) is becoming more and more important since their potential to meet the multiple needs for sensing applications in flexible electronics is now clearly established. Nevertheless, polymer micromachining for MEMS applications is not yet as mature as its silicon counterpart, and innovative microfabrication techniques are still expected. We show in the present work an emerging and versatile microfabrication method to produce arbitrary organic, spatially resolved micro-structures, starting from dilute inks, and with possibly a large choice of materials.
View Article and Find Full Text PDFNematic liquid crystalline elastomer grating and microwire fabricated by micro-molding in capillaries.
Macromol Rapid Commun
February 2013
Department of Chemical Engineering, Laboratory for Advanced Materials, Tsinghua University, Beijing 100084, P. R. China.
A new approach is developed to fabricate highly oriented mono-domain LCE nano/microstructures through micro-molding in capillaries. Gratings and microwires as two typical examples are fabricated and characterized by polarizing optical microscopy, optical microscopy, and scanning electron microscopy. The gratings with precisely controlled sizes and smooth surface are obtained by filling the channels with a nematic monomer mixture followed by the photo-crosslinking.
View Article and Find Full Text PDFMicropatterned polyelectrolyte nanofilms promote alignment and myogenic differentiation of C2C12 cells in standard growth media.
Biotechnol Bioeng
February 2013
NNL, CNR-Institute of Nanoscience, Via Arnesano, Lecce 73100, Italy.
Alignment of skeletal myoblasts is considered a critical step during myotube formation. The C2C12 cell line is frequently used as a model of skeletal muscle differentiation that can be induced by lowering the serum concentration in standard culture flasks. In order to mimic the striated architectures of skeletal muscles in vitro, micro-patterning techniques and surface engineering have been proven as useful approaches for promoting elongation and alignment of C2C12 myoblasts, thereby enhancing the outgrowth of multi-nucleated myotubes upon switching from growth media (GM) to differentiative media (DM).
View Article and Find Full Text PDFFabrication of an asymmetric Bragg coupler-based polymeric filter with a single-grating waveguide.
Opt Express
May 2011
Department of Electro-Optical Engineering, National Formosa University, Huwei, Yunlin, Taiwan.
In this work, a first report on fabricating an asymmetric Bragg coupler-based filter on polymeric waveguides without input-waveguide grating was revealed. The fabrication process we developed was using holographic interference techniques, capillary effect, soft lithography, and micro molding process. The transmission dip of about -9.
View Article and Find Full Text PDFSolution-processed chalcogenide glass for integrated single-mode mid-infrared waveguides.
Opt Express
December 2010
Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA.
Chalcogenide glass materials exhibit a variety of optical properties that make them desirable for near- and mid-infrared communications and sensing applications. However, processing limitations for these photorefractive materials have made the direct integration of waveguides with sources or detectors challenging. Here we demonstrate the viability of two complementary soft lithography methods for patterning and integrating chalcogenide glass waveguides from solution.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!