Design and Analysis of Novel Micromachined Thermocouples with Vertical Free-Standing High-Aspect-Ratio Geometry

2015 ◽  
Vol 44 (6) ◽  
pp. 2146-2150
Author(s):  
M. Wick ◽  
H. Hedler ◽  
H. Seidel
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Free Standing

Development of free standing anodes of high aspect ratio carbon materials for rechargeable Li-ion batteries

2013 ◽  
Vol 92 ◽  
pp. 55-63 ◽  
Author(s):  
Priyanka H. Maheshwari ◽  
C. Nithya ◽  
Shilpa Jain ◽  
R.B. Mathur
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Carbon Materials ◽  
Li Ion Batteries ◽  
Free Standing ◽  
Li Ion

scholarly journals Development of a Bi2Te3-based thermoelectric generator with high-aspect ratio, free-standing legs

2012 ◽  
Vol 27 (8) ◽  
pp. 1149-1156 ◽  
Author(s):  
D.E. Wesolowski ◽  
R.S. Goeke ◽  
A.M. Morales ◽  
S.H. Goods ◽  
P.A. Sharma ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Thermoelectric Generator ◽  
Free Standing ◽  
Image Position

Abstract

Fabrication of High Aspect Ratio Millimeter-Tall Free-Standing Carbon Nanotube-Based Microelectrode Arrays

2018 ◽  
Author(s):  
Guohai Chen ◽  
Berg Dodson ◽  
David M. Hedges ◽  
Scott C. Steffensen ◽  
John N. Harb ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Microelectrode Arrays ◽  
Free Standing

Ultrasound-assisted recovery of free-standing high-aspect-ratio micropillars

RSC Advances ◽  
2016 ◽  
Vol 6 (20) ◽  
pp. 16640-16644 ◽  
Author(s):  
Hongzhong Liu ◽  
Biao Lei ◽  
Weitao Jiang ◽  
Yonghao Li ◽  
Lei Yin ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Free Standing ◽  
Ultrasound Assisted ◽  
Micropillar Arrays

High-aspect-ratio polymer micropillar arrays are widely employed in microfluidics and microdevices.

A New Way to Form Three-Dimensional Microstructures by Electrochemical Etching of Silicon

2000 ◽  
Vol 638 ◽  
Author(s):  
P. Kleimann ◽  
J. Linnros ◽  
R. Juhasz
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Electrochemical Etching ◽  
Three Dimensional ◽  
Periodic Pattern ◽  
Free Standing ◽  
Vertical Walls ◽  
A New Technique ◽  
Etching Parameters ◽  
Current Lines

AbstractA new technique of bulk micromachining using anodic etching of (100)-oriented n-type silicon is presented. For particular conditions the transition regime between porous silicon formation and electropolishing enables the formation of high aspect ratio microtips which correspond to inverted macropore structures. This unusual property can be explained by the distortion of current lines near the basis of formed structures. The distortion, which prevents the tip dissolution, is due to the electrical field in the space charge region at the silicon-electrolyte interface. The same property can be used to form three-dimensional microstructures. The position and shape of the structures can be defined by forming steps of a few microns depth, prior tothe electrochemical etching. Then the etching parameters (HF concentration, light intensity, etching current density) are adjusted in order to electropolish the sample except where vertical walls are needed. This enables to form microstructures without a periodic pattern. The feasibility of this technique is demonstrated by forming 100μm wide pores, free-standing beams as well as high aspect ratio micro-needles and micro-tubes.

Fabrication of free-standing subwavelength metal–insulator–metal gratings using high-aspect-ratio nanoimprint techniques

2016 ◽  
Vol 55 (6S1) ◽  
pp. 06GP20 ◽  
Author(s):  
Hiroaki Honma ◽  
Masato Mitsudome ◽  
Shintaro Itoh ◽  
Makoto Ishida ◽  
Kazuaki Sawada ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Free Standing ◽  
Metal Insulator ◽  
Metal Insulator Metal ◽  
Metal Gratings

Fabrication and Characterization of High Aspect Ratio Conducting Polymer Fibers

2009 ◽  
Vol 1240 ◽  
Author(s):  
Miguel A. Saez ◽  
Lauren Montemayor ◽  
Priam Vasudevan Pillai ◽  
Ian W Hunter
Keyword(s):  
Aspect Ratio ◽  
Cross Sections ◽  
High Aspect Ratio ◽  
Strain Sensing ◽  
Free Standing ◽  
3 Dimensional ◽  
Smart Fabrics ◽  
Sensing Applications ◽  
Glassy Carbon Crucible

AbstractElectroactive conducting polymers are currently studied for use in smart textiles that incorporate sensing, actuation, control, and data transmission. The development of intelligent garments that integrate these various functionalities over wide areas (i.e. the human body) requires the production of long, highly conductive, and mechanically robust fibers. This study focuses on the electrical, mechanical and electrochemical characterization of high aspect ratio polypyrrole fibers produced using a novel, custom-built fiber slicing instrument. In order to ensure high conductivity and mechanical robustness, the fibers are sliced from tetra-ethylammonium hexafluorophosphate-doped polypyrrole thin films electrodeposited onto a glassy carbon crucible. The computer-controlled, four-axis slicing instrument precisely cuts the film into thin, long fibers by running a sharp blade over the crucible in a continuous helical pattern. This versatile fabrication process has been used to produce free-standing fibers with square cross-sections of 2 μm × 3 μm, 20 μm × 20 μm, and 100 μm × 20 μm with lengths of 15 mm, 460 mm, and 1,200 mm, respectively. An electrochemical dynamic mechanical analyzer built in-house for nano- and microfiber testing was used to perform stress-strain and conductivity measurements in air. The fibers were found to, on average, have an elastic modulus of 1.7 GPa, yield strength of 37 MPa, ultimate tensile strength of 80 MPa, elongation at break of 49%, and an electrical conductivity of 12,700 S/m. SEM micrographs show that the fibers are free of defects and have cleanly cut edges. Preliminary measurements of the fibers’ strain-resistance relationship have resulted in gage factors suitable for strain sensing applications. Initial tests of the actuation performance of fibers in neat 1-butyl-3-methylimidazolium hexaflourophosphate have shown promising results. These monofilament fibers may be spun into yarns or braided into 2- and 3-dimensional structures for use as actuators, sensors, antennae, and electrical interconnects in smart fabrics.

Fabrication of Free-Standing, Self-Aligned, High-Aspect-Ratio Synthetic Ommatidia

2016 ◽  
Vol 8 (45) ◽  
pp. 30671-30676 ◽  
Author(s):  
Brian M. Jun ◽  
Francesca Serra ◽  
Yu Xia ◽  
Hong Suk Kang ◽  
Shu Yang
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Free Standing
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