scholarly journals Polymer Microfluidics: Simple, Low-Cost Fabrication Process Bridging Academic Lab Research to Commercialized Production

Micromachines ◽  
2016 ◽  
Vol 7 (12) ◽  
pp. 225 ◽  
Author(s):  
Chia-Wen Tsao
Keyword(s):  
Low Cost ◽  
Fabrication Process ◽  
Polymer Microfluidics

scholarly journals Fabrication of Porous Silicon Based Humidity Sensing Elements on Paper

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Tero Jalkanen ◽  
Anni Määttänen ◽  
Ermei Mäkilä ◽  
Jaani Tuura ◽  
Martti Kaasalainen ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Smart Cities ◽  
Low Cost ◽  
Electrical Characterization ◽  
Fabrication Process ◽  
Sensing Element ◽  
Paper Substrate ◽  
Roll To Roll ◽  
Silver Electrodes ◽  
Silicon Based

A roll-to-roll compatible fabrication process of porous silicon (pSi) based sensing elements for a real-time humidity monitoring is described. The sensing elements, consisting of printed interdigitated silver electrodes and a spray-coated pSi layer, were fabricated on a coated paper substrate by a two-step process. Capacitive and resistive responses of the sensing elements were examined under different concentrations of humidity. More than a three orders of magnitude reproducible decrease in resistance was measured when the relative humidity (RH) was increased from 0% to 90%. A relatively fast recovery without the need of any refreshing methods was observed with a change in RH. Humidity background signal and hysteresis arising from the paper substrate were dependent on the thickness of sensing pSi layer. Hysteresis in most optimal sensing element setup (a thick pSi layer) was still noticeable but not detrimental for the sensing. In addition to electrical characterization of sensing elements, thermal degradation and moisture adsorption properties of the paper substrate were examined in connection to the fabrication process of the silver electrodes and the moisture sensitivity of the paper. The results pave the way towards the development of low-cost humidity sensors which could be utilized, for example, in smart packaging applications or in smart cities to monitor the environment.

Development of Bridge Tooling for Fabricating Mold Inserts of Aspheric Optical Lens

2012 ◽  
Vol 516 ◽  
pp. 228-233
Author(s):  
Chil Chyuan Kuo ◽  
Zhi Yang Lin
Keyword(s):  
Success Rate ◽  
Silicone Rubber ◽  
Low Cost ◽  
Fabrication Process ◽  
Optical Lens ◽  
Aspheric Lenses

Bridge tooling has been developed for fabricating the temporary mould inserts of aspheric lenses using silicone rubber materials. Prototype material for aspheric lenses is not recommended as quartz due to the low success rate in the fabrication process. This technology provides a fast, low cost and highly successful rate of fabricating the epoxy-based composite mould inserts of plastic aspheric optical lenses.

Design and Analysis of Hybrid Fused Filament Fabrication Apparatus for Fabrication of Composites

2021 ◽  
Vol 14 ◽  
Author(s):  
Aniket Yadav ◽  
Piyush Chohan ◽  
Ranvijay Kumar ◽  
Jasgurpreet Singh Chohan ◽  
Raman Kumar
Keyword(s):  
Additive Manufacturing ◽  
Composite Materials ◽  
Design Process ◽  
Low Cost ◽  
Matrix Material ◽  
Fabrication Process ◽  
Layer By Layer ◽  
Fused Filament Fabrication ◽  
Composite Manufacturing ◽  
Tool Paths

Background: Additive manufacturing is the most famous technology which requires materials or composites to be fabricated with layer by layer deposition strategy. Due to its lower cost, higher accuracy and less material wastage; this technology is used in almost every sector. But in many applications there is a need to alter the properties of a product in a certain direction with the help of some reinforcements. With the use of reinforcements, composite layers can be fabricated using additive manufacturing technique which will enhance the directional properties. A novel apparatus is designed to spray the reinforcement material into the printed structures in a very neat and precise manner. This spray nozzle is fully automated, which works according to tool-paths generated by slicing software. The alternate deposition of layers of reinforcement and build materials helped to fabricate customized composite products. Objective: The objective of present study is to design and analyze the working principle of novel technique which has been developed to fabricate composite materials using additive manufacturing. The apparatus is numerically controlled by computer according to CAD data which facilitates the deposition of alternate layers of reinforcement and matrix material. The major challenges during the design process and function of each component has been explored. Methods: The design process is initiated after comprehensive literature review performed to study previous composite manufacturing processes. The recent patents published by different patent offices of the world are studied in detail and analysis has been used to design a low cost composite fabrication apparatus. A liquid dispensing device comprises a storage tank attached with a pump and microprocessor. The microprocessor receives the signal from the computer as per tool paths generated by slicing software which decides the spray of reinforcements on polymer layers. The spraying apparatus moves in coordination with the primary nozzle of the Fused Filament Fabrication process. Results: The hybridization of Fused Filament Fabrication [process with metal spray process has been successfully performed. The apparatus facilitates the fabrication of low cost composite materials along with flexibility of complete customization of composite manufacturing process. The anisotropic behaviour of products can be easily controlled and managed during fabrication which can be used for different applications.

Platinum-Catalyzed Polymer Electrolyte Membrane for Fuel Cells

1999 ◽  
Vol 575 ◽  
Author(s):  
T. Jan Hwang ◽  
Hong Shao ◽  
Neville Richards ◽  
Jerome Schmitt ◽  
Andrew Hunt ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Low Cost ◽  
Polymer Electrolyte Membrane ◽  
Chemical Vapor ◽  
Proton Exchange ◽  
Fabrication Process ◽  
Membrane Electrode ◽  
Fuel Cell Performance ◽  
Electrolyte Membrane

ABSTRACTThe objective of this research is to develop the combustion chemical vapor deposition (CCVD) process for low-cost manufacture of catalytic coatings for proton exchange membrane fuel cell (PEMFC) applications. The platinum coatings as well as the fabrication process for membrane-electrode-assemblies (MEAs) were evaluated in a single testing fuel cell using hydrogen/oxygen. It was found that increasing the platinum loading from 0.05 to 0.1 mg/cm2 did not increase the fuel cell performance. The in-house MEA fabrication process needs to be improved to reduce the cell resistance. Significantly higher performance of Pt coating by the CCVD process has been obtained by MCT's fuelcell industry collaborators who are more experienced with MEA fabrication. The results can not be revealed due to confidentiality agreements.

A novel low-cost fabrication process for bulk-mode resonators in X-ray LIGA technology

2012 ◽  
Author(s):  
Abolfazl Bijari ◽  
Sayyed-Hossein Keshmiri ◽  
Arisara Leenaphet ◽  
Winai Wanburi ◽  
Nimit Chomnawang ◽  
...  
Keyword(s):  
Low Cost ◽  
Fabrication Process ◽  
X Ray ◽  
Liga Technology ◽  
Bulk Mode

Structure Characterization of Low Cost Fabricated Soft Material Built Microchannel

2016 ◽  
Vol 857 ◽  
pp. 578-582 ◽  
Author(s):  
Q. Humayun ◽  
Uda Hashim ◽  
Che Mohd Ruzaidi
Keyword(s):  
Biological Samples ◽  
Low Cost ◽  
Soft Material ◽  
Fabrication Process ◽  
Structure Characterization ◽  
Current Paper ◽  
Micro Channel ◽  
Inoculation Technique ◽  
Laboratory Activities

To perform the entire laboratory activities on a centimeter limit scale electronic chip, the most important aspect is to fabricate a device which persist sensitive and selective for the delivery of fluids flow and have the ability to execute a fast mixing of distinctive chemicals and bio samples. To resolve this issues the current paper is one of the good struggle, therefore the objective was arranged in according to the scope of research such as; to design and fabricate a polydimethylsiloxane (PDMS) material made, micro channel and its structure characterization for the investigation of internal subterranean area. By using an AutoCAD software the channel was first designed, however for the fabrication process the design was transferred to mask. Starting from SU-8 resist the pattern was transferred, and then by using the polydimethylsiloxane (PDMS) the mold was fabricated by adopting a low cost photolithography technique. Finally by employing Hawk 3 D surface nanoprofiler the structure was characterized. In our forthcoming research the device will be tested for real biological samples using a simple hand-operated inoculation technique.

scholarly journals Low cost and green preparation process for α-Fe2O3@gum arabic electrode for high performance sodium ion batteries

2017 ◽  
Vol 5 (5) ◽  
pp. 2102-2109 ◽  
Author(s):  
Li Xu ◽  
Hansinee Sitinamaluwa ◽  
Henan Li ◽  
Jingxia Qiu ◽  
Yazhou Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Gum Arabic ◽  
Fabrication Process ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Preparation Process ◽  
Water Based ◽  
Electrode Fabrication ◽  
First Time

A high performance α-Fe2O3 electrode is prepared via a green gum arabic-water based electrode fabrication process for SIBs for the first time.

Plastic Soda Bottles: A Reusable Material for Making Transradial Sockets

2009 ◽  
Vol 33 (2) ◽  
pp. 100-106 ◽  
Author(s):  
Yeongchi Wu ◽  
Hector R. Casanova ◽  
Andrea J. Ikeda
Keyword(s):  
Assistive Technology ◽  
Low Cost ◽  
Self Care ◽  
Cost Effective ◽  
Fabrication Process ◽  
Potential Cost ◽  
Functional Activities ◽  
Hand Prosthesis ◽  
Light Duty ◽  
Resource Limited

This paper describes a new fabrication process for making low-cost transradial sockets using recyclable plastic soda bottles. Easy, fast, and inexpensive to fabricate, the resulting socket can be used as a temporary device for stump care. Multiple sockets can be made and individually incorporated with various terminal devices for light-duty self-care or functional activities, such as feeding, showering, typing, swimming, or gardening. The formed socket is lightweight and also suitable for use with a cosmetic passive hand prosthesis. This process has been developed as a potential cost-effective assistive technology appropriate for individuals with transradial amputation in resource-limited countries.

Inkjet-printed PEDOT:PSS multi-electrode arrays for low-cost in vitro electrophysiology

Lab on a Chip ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 3776-3786 ◽  
Author(s):  
Leonardo D. Garma ◽  
Laura M. Ferrari ◽  
Paola Scognamiglio ◽  
Francesco Greco ◽  
Francesca Santoro
Keyword(s):  
Cell Cultures ◽  
Low Cost ◽  
Fabrication Process ◽  
Cardiac Cell ◽  
Proof Of Concept ◽  
Electrode Arrays ◽  
Electrophysiological Analysis ◽  
Valid Proof ◽  
Cardiac Cell Cultures

We present an innovative fabrication process for the production of low cost fully-plastic flexible MEAs and prove that they are a valid proof-of-concept for a platform for the electrophysiological analysis of cardiac cell cultures.

Diamond turning fabrication of an ultra-compact endoscope

2016 ◽  
Vol 5 (4) ◽  
Author(s):  
Chih-Yu Huang ◽  
Rongguang Liang
Keyword(s):  
Optical System ◽  
Low Cost ◽  
High Accuracy ◽  
Diamond Turning ◽  
Fabrication Process ◽  
Stray Light ◽  
Assembly Process ◽  
Interference Fringes ◽  
Compact Size ◽  
Endoscope System

AbstractIn this paper, we propose a technique by integrating mechanical mounts into lens elements to fulfill a self-aligned and self-assembled optical system. To prove this concept, we designed, fabricated, and tested an ultra-compact endoscope that adopts this technique. By taking advantages of the specially designed fixture and observing the interference fringes between the lens and fixture, we developed a method to minimize decenter and tilt between the two surfaces of the endoscope lens during the diamond turning fabrication process. The integrated mechanical mounts provide an easy assembly process for the endoscope system while maintaining high accuracy in system alignment. With the application of heat shrink tube as the endoscope system holder and to block stray light, the proposed endoscope system has the advantages of low cost, compact size, and high imaging quality.

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