Ultra-low-cost, flexible and durable electrochromic tape device based on aluminum foil

2021 ◽  
pp. 139760
Author(s):  
Martin Rozman ◽  
Andraž Mavrič ◽  
Gregor Kravanja ◽  
Matjaž Valant ◽  
Amirhossein Pakseresht
Keyword(s):  
Low Cost ◽  
Aluminum Foil

A Very Low-Cost, Labor-Efficient, and Simple Method to Block Scattered Ultraviolet Light in PDMS Microfluidic Devices by Inserting Aluminum Foil Strips

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Shuo Wang ◽  
Peter Shankles ◽  
Scott Retterer ◽  
Yong Tae Kang ◽  
Chang Kyoung Choi
Keyword(s):  
Soft Lithography ◽  
Uv Light ◽  
Low Cost ◽  
Microfluidic Devices ◽  
Aluminum Foil ◽  
Material Synthesis ◽  
Simple Method ◽  
Micro Particles ◽  
Complex Shapes ◽  
The Cost

Abstract Opto-microfluidic methods have advantages for manufacturing complex shapes or structures of micro particles/hydrogels. Most of these microfluidic devices are made of polydimethylsiloxane (PDMS) by soft lithography because of its flexibility of designing and manufacturing. However, PDMS scatters ultraviolet (UV) light, which polymerizes the photocrosslinkable materials at undesirable locations and clogs the microfluidic devices. A fluorescent dye has previously been employed to absorb the scattered UV light and shift its wavelength to effectively solve this issue. However, this method is limited due to the cost of the materials (tens of dollars per microchip), the time consumed on synthesizing the fluorescent material and verifying its quality (two to three days). More importantly, significant expertise on material synthesis and characterization is required for users of the opto-microfluidic technique. The cost of preliminary testing on multiple iterations of different microfluidic chip designs would also be excessive. Alternatively, with a delicate microchannel design, we simply inserted aluminum foil strips (AFS) inside the PDMS device to block the scattered UV light. By using this method, the UV light was limited to the exposure region so that the opto-microfluidic device could consistently generate microgels longer than 6 h. This is a nearly cost- and labor-free method to solve this issue.

scholarly journals Commercial Gold Nanoparticles on Untreated Aluminum Foil: Versatile, Sensitive, and Cost-Effective SERS Substrate

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Kristina Gudun ◽  
Zarina Elemessova ◽  
Laura Khamkhash ◽  
Ekaterina Ralchenko ◽  
Rostislav Bukasov
Keyword(s):  
Gold Nanoparticles ◽  
Low Cost ◽  
Aluminum Foil ◽  
Cost Effective ◽  
Sers Substrate ◽  
Au Film ◽  
Response Range ◽  
Sers Detection ◽  
Film Substrate ◽  
Linear Response Range

We introduce low-cost, tunable, hybrid SERS substrate of commercial gold nanoparticles on untreated aluminum foil (AuNPs@AlF). Two or three AuNP centrifugation/resuspension cycles are proven to be critical in the assay preparation. The limits of detection (LODs) for 4-nitrobenzenethiol (NBT) and crystal violet (CV) on this substrate are about 0.12 nM and 0.19 nM, respectively, while maximum analytical SERS enhancement factors (AEFs) are about 107. In comparative assays LODs for CV measured on AuNPs@Au film and AuNPs@glass are about 0.35 nM and 2 nM, respectively. The LOD for melamine detected on AuNPs@ Al foil is 27 ppb with 3 orders of magnitude for linear response range. Overall, AuNPs@AlF demonstrated competitive performance in comparison with AuNPs@ Au film substrate in SERS detection of CV, NBT, and melamine. To check the versatility of the AuNPs@AlF substrate we also detected KNO3 with LODs of 0.7 mM and SERS EF around 2 × 103, which is on the same order with SERS EF reported for this compound in the literature.

A simple capacitive proximity sensor experiment for exploring the effects of body capacitance and earth ground

2018 ◽  
Vol 55 (4) ◽  
pp. 367-377 ◽  
Author(s):  
Aaron D Scher
Keyword(s):  
Low Cost ◽  
Aluminum Foil ◽  
Parasitic Capacitance ◽  
Simple Design ◽  
Simple Circuit ◽  
Proximity Sensor ◽  
First Case ◽  
Lcr Meter

Capacitive proximity sensors are well-suited for educational projects due to their low cost and simple design. Traditional undergraduate textbooks and lab exercises rarely highlight the fact that the performance of capacitive proximity sensors can be quite sensitive to ground loading. This paper presents a simple classroom demonstration for exploring this topic in detail. The capacitive proximity sensor for this demonstration is a hand-held LCR meter connected to a homemade capacitor composed of two strips of aluminum foil. Students explore the operation of this sensor for two different system ground configurations. In the first case the LCR meter is battery powered (floating ground referenced) and in the second case the LCR meter is powered by AC mains supply (earth ground referenced). When a student positions their hand near the foil strips, the battery-powered sensor measures an increase in capacitance. Conversely, the AC-mains-powered sensor measures a decrease in capacitance. The instructor guides students to discover for themselves the reason for this seemingly puzzling difference by modeling parasitic capacitance and ground loading using simple circuit models.

Fabrication and Characterization of Al-Fe Coating for the Wet-Seal Area of Separator for Molten Carbonate Fuel Cells (MCFC) by the Laminating of Al Foil

2007 ◽  
Vol 124-126 ◽  
pp. 1577-1580
Author(s):  
Jae Woong Choi ◽  
Gil Ho Hwang ◽  
Heung Jae Oh ◽  
Sung Goon Kang
Keyword(s):  
Fuel Cells ◽  
Low Cost ◽  
Spray Coating ◽  
Aluminum Foil ◽  
Molten Carbonate ◽  
High Melting Point ◽  
Complicated Process ◽  
Molten Carbonate Fuel Cells ◽  
And Diffusion

The separator of the molten carbonate fuel cells (MCFC) has the major corrosion problems, especially wet-seal area, because this part contacts directly with the corrosive molten carbonate electrolyte. For the protection of the wet-seal area, aluminization method is developed recently. Coated aluminum reacts with the molten carbonate and forms the LiAlO2 having high corrosion resistance, high melting point, no electrical conductivity and no dissolution in molten carbonate. In this study, 50㎛ thickness aluminum foil was applied to form the Al-Fe coating layer on the AISI316L by using the laminating method. Laminating of aluminum foil on AISI 316L was performed at 630°C for 5h in Ar atmosphere using a jig and diffusion heat treatment was carried out at 700°C, 750°C and 800°C for 3h in Ar atmosphere respectively. This method simplified the existing complicated process and has a great advantage of low-cost mass production compared to other methods like PVD, CVD and spray coating.

scholarly journals Comparative Study of Energy Harvesting from ZnO Nanorods Using Different Flexible Substrates

2014 ◽  
Vol 1 (1-2) ◽  
Author(s):  
Mushtaque Hussain ◽  
Mazhar Ali Abbasi ◽  
Azam Khan ◽  
Omer Nur ◽  
Magnus Willander
Keyword(s):  
Energy Harvesting ◽  
Low Cost ◽  
Flexible Substrate ◽  
Zno Nanorods ◽  
Aluminum Foil ◽  
Electrical Energy ◽  
Flexible Substrates ◽  
Contact Mode ◽  
Promising Alternative ◽  
Textile Fabric

AbstractThe step toward the fabrication of nanodevices with low cost and improved performance is of high demand; therefore, in the present study, different flexible substrates like common paper, textile fabric, plastic and aluminum foil have been utilized to harvest electrical energy. ZnO nanorods (NRs) were grown by using low-temperature aqueous chemical growth method. The obtained ZnO NRs were highly dense, well aligned, uniformly distributed over the substrates and exhibited good crystal quality. The structural study was carried out by using X-ray powder diffraction and scanning electron microscopy. The piezoelectric properties of ZnO NRs were investigated by the help of an atomic force microscope using contact mode. The measurements of generated piezoelectricity were around 16.2 mV, 23.2 mV, 38.5 mV and 43.3 mV for common paper, textile fabric, plastic and aluminum foil, respectively. This investigation is an important step in order to study the effect of different substrates influencing the magnitude of the output voltage under identical growth and measurement conditions. We expect that this study will help identify the most suitable flexible substrate for harvesting energy. It also offers a promising alternative powering source for the next generation nanodevices using non-conventional substrates like aluminum foil. Moreover, the use of aluminum foil as flexible and low cost substrate may pave the way to develop devices in different fields including energy harvesting.

scholarly journals Design of Novel Yagi Aperture Antennas for Indoor TV Reception using Low Cost Materials

2012 ◽  
Vol 1 (3) ◽  
pp. 95
Author(s):  
Sofian Hamid
Keyword(s):  
Low Cost ◽  
Aluminum Foil ◽  
Unique Property ◽  
Light Weight ◽  
Aperture Antennas ◽  
Wire Antennas

Most commercial Yagi antennas for TV reception are built based on wires. These Yagi wire-antennas are commonly used as outdoor antennas due to their size and weight properties. In this paper, novel light weight Yagi aperture antennas are introduced. Two prototypes had been built by using low cost materials such as aluminum (insects) screen, cylinder can, aluminum foil, and styrofoam. The antennas worked at the TV band and have gains around 9.7 – 13.5 dBi comparable to the outdoor Yagi wire antennas. Due to their lightweight and smaller dimension nature, they were suitable for used as indoor TV antennas. The antennas had also unique property due to the use of Styrofoam. They were portable, easy to construct and deconstruct.

scholarly journals Design and Analysis of Parabolic Trough Solar Water Heating System

2019 ◽  
Vol 2 (3) ◽  
Author(s):  
Samia Tabassum ◽  
Laila Sharmin ◽  
Muhammad Shahriar Bashar ◽  
Mashudur Rahaman ◽  
Sumon Chandra Debnath ◽  
...  
Keyword(s):  
Energy Demand ◽  
Low Cost ◽  
Thermal Power ◽  
Industrial Process ◽  
Aluminum Foil ◽  
Heating System ◽  
Manufacturing Cost ◽  
Parabolic Trough ◽  
Water Heating ◽  
Solar Water Heating System

Renewable energy technology is one of the prospective sources which can meet the energy demand and can contribute to achieve sustainable development goals. Concentrated collectors are widely used in solar thermal power generation and water heating system also. It is very popular due to its high thermal efficiency, simple construction requirements and low manufacturing cost. This paper is concerned with an experimental study of parabolic trough collector for water heating technology. It focuses on the performance of concentrating solar collector by changing the reflector materials (aluminum sheet, aluminum foil and mirror film). In Bangladesh, it is possible to use low cost solar concentrating technologies for domestic as well as industrial process heat applications. The line focusing parabolic trough collectors have been designed, developed and evaluated its performance by collecting solar radiation, inlet and outlet water temperature, flow rate, efficiency etc.

A Low-Cost Mechanically Rechargeable Aluminum–Air Cell for Energy Conversion Using Low-Grade Aluminum Foil

2016 ◽  
Vol 13 (1) ◽  
Author(s):  
Binbin Chen ◽  
Dennis Y. C. Leung
Keyword(s):  
Energy Conversion ◽  
Low Cost ◽  
Aluminum Foil ◽  
Hydrogen Gas ◽  
Utilization Efficiency ◽  
Gravity Flow ◽  
Carbon Paper ◽  
Low Grade ◽  
Cell Discharge ◽  
High Utilization

The performance of a mechanically rechargeable aluminum (Al)–air cell, fabricated with low-cost materials including low-grade aluminum foil and carbon paper electrodes, was evaluated. The design adopted a free gravity flow for the electrolyte to eliminate the use of an external pump. A tank for storing waste electrolyte was designed with a dedicated channel for the collection of hydrogen gas generated during the cell discharge. The cell achieved a high utilization efficiency of aluminum. Considering both the electricity and hydrogen generated, an overall utilization efficiency of around 90% or even higher could be achieved under different working voltages. Results of repeated recharging/discharging showed that the performances of the cell could be maintained for repeated refilling.

scholarly journals Effect of Reflecting Material on CPC to Improve the Performance of Hybrid Groundwater Solar Desalination System

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
S. A. Kedar ◽  
A. K. Bewoor ◽  
G. Murali ◽  
Ravinder Kumar ◽  
Milad Sadeghzadeh ◽  
...  
Keyword(s):  
Solar Energy ◽  
Low Cost ◽  
Aluminum Foil ◽  
Weather Conditions ◽  
Soft Water ◽  
Single Stage ◽  
Human Beings ◽  
Solar Desalination ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

Water-energy nexus is a crucial and challenging concern that addressing it is noteworthy for the future of human beings. In addition, freshwater production is a highly energy-intensive procedure. Therefore, developing a suitable solution for this problem is of importance. In the present scenario, solar energy is one of the suitable options for desalination because solar energy is available at a low cost, is clean for the environment, and is widely available. Generally, solar collectors such as flat plate collectors (FPC) and evacuated tube collectors were experimented for desalination applications. This work presents an experimental investigation of a single-stage hybrid (ETC-CPC) groundwater solar desalination system. A compound parabolic concentrator (CPC) is placed below the evacuated tube collector (ETC) for collecting solar radiations to transfer heat to evacuated tubes which improves performance in the case of different weather conditions of Pune city in India. Experimental results show that the hybrid solar groundwater desalination system, by maintaining the optimum distance of 20 mm between ETC and CPC with Mylar as the reflecting material, could offer a drinking water production rate of up to 3.4 l/(m2h)/day. However, the proposed single-stage hybrid (ETC+CPC) groundwater solar desalination system with aluminum foil as a reflecting material could generate 1.9 liters of soft water per day. Further, the use of Mylar as a reflecting material could generate 3.5 liters of soft water per day.

Novel Testing Method for Fuel Cell Hardware Design and Assembly

2005 ◽  
Vol 2 (3) ◽  
pp. 197-201 ◽  
Author(s):  
Fang-Bor Weng ◽  
Ay Su ◽  
Yur-Tsai Lin ◽  
Guo-Bin Jung ◽  
Yen-Ming Chen
Keyword(s):  
Fuel Cell ◽  
Gas Permeability ◽  
Low Cost ◽  
Aluminum Foil ◽  
Cell Performance ◽  
Carbon Paper ◽  
Membrane Electrode ◽  
Testing Method ◽  
Ohmic Resistance ◽  
Hardware Development

A simple, low-cost testing method is proposed for fuel cell hardware development. A perforated aluminum foil with an array of small holes covered with carbon paper or cloth replaces the membrane electrode assemblies to test the contact resistance and gas permeability of the carbon paper. Practical fuel cells of 50cm2 reaction area with different gasket thicknesses and compressed pressures are tested for performance. The results of ohmic resistance and permeability of compressed carbon paper indicate strong relevance to cell performance, demonstrating that this novel testing method is valuable for fuel cell hardware development. Also, the compression mechanism of the diffusion layer is discussed along with a proposal for a strategy for improving cell performance. After that, an advanced design of a 25cm2 single cell is developed. The results of cell performance of the advanced cell are acceptable and competitive with the performance data of commercial products.

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