scholarly journals Experimental Characterization of Inkjet-Printed Stretchable Circuits for Wearable Sensor Applications

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3476 ◽  
Author(s):  
Jumana Abu-Khalaf ◽  
Razan Saraireh ◽  
Saleh Eisa ◽  
Ala’aldeen Al-Halhouli
Keyword(s):  
Wearable Sensors ◽  
Cost Effective ◽  
Experimental Characterization ◽  
Wearable Sensor ◽  
Successful Development ◽  
Sensor Applications ◽  
Cost Effective Method ◽  
Stretchable Circuits ◽  
Nanoparticle Ink

This paper introduces a cost-effective method for the fabrication of stretchable circuits on polydimethylsiloxane (PDMS) using inkjet printing of silver nanoparticle ink. The fabrication method, presented here, allows for the development of fully stretchable and wearable sensors. Inkjet-printed sinusoidal and horseshoe patterns are experimentally characterized in terms of the effect of their geometry on stretchability, while maintaining adequate electrical conductivity. The optimal fabricated circuit, with a horseshoe pattern at an angle of 45°, is capable of undergoing an axial stretch up to a strain of 25% with a resistance under 800 Ω. The conductivity of the circuit is fully reversible once it is returned to its pre-stretching state. The circuit could also undergo up to 3000 stretching cycles without exhibiting a significant change in its conductivity. In addition, the successful development of a novel inkjet-printed fully stretchable and wearable version of the conventional pulse oximeter is demonstrated. Finally, the resulting sensor is evaluated in comparison to its commercially available counterpart.

Experimental Characterization of the Structural Deformation of Type IV Pressure Vessels Subjected to Internal Pressure

2019 ◽  
Vol 809 ◽  
pp. 47-52 ◽  
Author(s):  
Martin Nebe ◽  
Daniel Maraite ◽  
Clemens Braun ◽  
Daniel Hülsbusch ◽  
Frank Walther
Keyword(s):  
Internal Pressure ◽  
Test Chamber ◽  
Simulation Models ◽  
Cost Effective ◽  
Pressure Vessels ◽  
Structural Deformation ◽  
Experimental Characterization ◽  
Type Iv ◽  
Structural Mass

The investigations deal with the experimental characterization of the structural deformation of type IV pressure vessels subjected to internal pressure. For the widespread use of hydrogen technology in transport industries, the development of cost-effective storage systems is a crucial step. State of the art in the field of hydrogen storage are type IV pressure vessels, which consist of a polymeric liner and an enforcing winding of carbon fiber-reinforced plastic (CFRP). For the development of material-optimized and high-safety pressure vessels, the acquisition of reliable experimental data in order to validate numerical simulations is a necessity. In a specially designed test chamber subscale vessels are clamped and subjected to internal pressure. At defined pressure stages the vessel’s deformation is recorded and analyzed. Consequently, the overall structural deformation is assessed with regard to the used structural mass, the burst pressure and the resulting failure. The results can be used for structure optimization purposes as well as for the optimization of numerical simulation models.

A cost-effective method for purification and characterization of human urinary albumin

2019 ◽  
Vol 1114-1115 ◽  
pp. 31-44 ◽  
Author(s):  
Shamkant B. Badgujar ◽  
Bhupesh C. Mali ◽  
Babasaheb Tandale ◽  
Siddharth B. Daftary ◽  
Sanjeev Lala ◽  
...  
Keyword(s):  
Cost Effective ◽  
Urinary Albumin ◽  
Purification And Characterization ◽  
Cost Effective Method

scholarly journals Copper β-trinitrocorrolates

2013 ◽  
Vol 17 (06n07) ◽  
pp. 440-446 ◽  
Author(s):  
Manuela Stefanelli ◽  
Sara Nardis ◽  
Frank R. Fronczek ◽  
Kevin M. Smith ◽  
Roberto Paolesse
Keyword(s):  
Main Product ◽  
Cost Effective ◽  
Crystallographic Analysis ◽  
Free Base ◽  
Substitution Reactions ◽  
Huge Number ◽  
X Ray ◽  
Cost Effective Method ◽  
Fold Excess

The β-nitration reaction carried out on the corrole macrocycle has been shown to be extremely regioselective, although the reduced symmetry of the macrocycle could potentially lead to a huge number of possible regioisomers. We recently reported that the careful use of AgNO 2/ NaNO 2 as a nitrating system enabled the achievement in good yields of mono- and dinitro-derivatives on both corrole free base and its copper complex, proving to be an efficient and cost-effective method. In this work, we present a detailed study of the scope of this method using TtBuCorrH 3 as a model corrole. A further increase of the oxidant pushes the nitration up to the functionalization of three β-pyrrolic positions, although concomitant decomposition of the macrocycle is also observed. The application of the proven nitration method with a five-fold excess of both silver and sodium nitrites with respect to corrole, afforded the 2,3,17-( NO 2)3- TtBuPCorrCu as the main product, in 25% yield, together with traces of another compound identified by X-ray crystallographic analysis as the 3,8,17-( NO 2)3- TtBuPCorrCu isomer. In light of these recent results, we also reinvestigated the characterization of the nitration products obtained from bis-substitution reactions, allowing among others the identification of the copper 3,8-( NO 2)2 corrolate.

scholarly journals Fabrication And Characterization of Biomagnetic Composite Material

2019 ◽  
Vol 2 (3) ◽  
pp. 1233-1237
Author(s):  
Yekbun Avşar Teymur ◽  
Fuat Güzel ◽  
Gülbahar Akkaya Sayğılı
Keyword(s):  
Magnetic Material ◽  
Composite Material ◽  
Low Cost ◽  
Cost Effective ◽  
Precipitation Method ◽  
Cost Effective Method ◽  
Tomato Processing ◽  
Nanoparticles Characterization ◽  
Co Precipitation

In this study, the synthesis and characterization of a biomagnetic composite material was achieved by a simple and cost effective method. Tomato processing waste was successfully converted into a magnetic material via embedding Fe3O4 nanoparticles to its structure. Due to its low cost and ease of application, co-precipitation method was used for loading the magnetite nanoparticles. Characterization studies were carried out with Fourier transform infrared spectroscopy, scanning electron microscopy and vibrating sample magnetometer spectroscopy and the outcomes of the analyses of non-magnetic and magnetic material were compared.

scholarly journals Fabrication of Lateral Polysilicon Gap of Less than 50 nm Using Conventional Lithography

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Th. S. Dhahi ◽  
U. Hashim ◽  
M. E. Ali ◽  
N. M. Ahmed ◽  
T. Nazwa
Keyword(s):  
Oxidation Process ◽  
Electrical Characterization ◽  
Cost Effective ◽  
Double Layer Capacitance ◽  
Reduction Techniques ◽  
Cost Effective Method ◽  
Pattern Size ◽  
Potential Applications ◽  
Conventional Photolithography

We report a thermal oxidation process for the fabrication of nanogaps of less than 50 nm in dimension. Nanogaps of this dimension are necessary to eliminate contributions from double-layer capacitance in the dielectric detection of protein or nucleic acid. The method combines conventional photolithography and pattern-size reduction techniques. The gaps are fabricated on polysilicon-coated silicon substrate with gold electrodes. The dimensions of the structure are determined by scanning electron microscopy (SEM). An electrical characterization of the structures by dielectric analyzer (DA) shows an improved conductivity as well as enhanced permittivity and capacity with the reduction of gap size, suggesting its potential applications in the detection of biomolecule with very low level of power supply. Two chrome Masks are used to complete the work: the first Mask is for the nanogap pattern and the second one is for the electrodes. An improved resolution of pattern size is obtained by controlling the oxidation time. The method expected to enable fabrication of nanogaps with a wide ranging designs and dimensions on different substrates. It is a simple and cost-effective method and does not require complicated nanolithography process for fabricating desired nanogaps in a reproducible fashion.

Structural characterization of Ag-doped TiO2 with enhanced photocatalytic activity

RSC Advances ◽  
2015 ◽  
Vol 5 (125) ◽  
pp. 103752-103759 ◽  
Author(s):  
Lidiaine M. Santos ◽  
Werick A. Machado ◽  
Marcela D. França ◽  
Karen A. Borges ◽  
Roberto M. Paniago ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Thermal Treatment ◽  
Structural Characterization ◽  
Sol Gel ◽  
Cost Effective ◽  
Doped Tio2 ◽  
Cost Effective Method ◽  
Gel Technique

Ag-doped TiO2 nanoparticles with different metallic content (0.5, 2.0, and 5.0% m/m) were prepared using a simple and cost-effective method based on a sol–gel technique, followed by thermal treatment.

scholarly journals A Method for the Isolation and Characterization of Mycosporine-Like Amino Acids from Cyanobacteria

2018 ◽  
Vol 1 (4) ◽  
pp. 46 ◽  
Author(s):  
Siripat Ngoennet ◽  
Yasuhiro Nishikawa ◽  
Takashi Hibino ◽  
Rungaroon Waditee-Sirisattha ◽  
Hakuto Kageyama
Keyword(s):  
Amino Acids ◽  
Liquid Chromatography ◽  
Radical Scavenging Activity ◽  
Scale Up ◽  
Radical Scavenging ◽  
Cost Effective ◽  
Industrial Applications ◽  
Isolation And Characterization ◽  
Cost Effective Method

This report provides a broadly applicable and cost-effective method for the purification of mycosporine-like amino acids (MAAs) from cyanobacteria. As MAAs are known to have multiple bioactivities for health and beauty, a universal isolation method of MAAs from biomass is attractive. In particular, the biomass of photosynthetic microorganisms such as cyanobacteria is of interest as a natural source of useful compound production, because of their photoautotrophic property. The method presented here is applicable for the isolation of mycosporine-2-glycine (M2G), which is a rare MAA produced in a halotolerant cyanobacterium. This method also allowed for the isolation of two of the most common MAAs, shinorine (SHI) and porphyra-334 (P334). A three-step separation process using low pressure liquid chromatography yielded purified MAAs, which were characterized by nuclear magnetic resonance (NMR) and liquid chromatography-mass spectrometry (LC/MS) analyses. The purified MAAs exhibited free radical scavenging activity in the 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assay. The experimental parameters obtained in this report may allow for a scale-up of the MAA purification process for future industrial applications.

Simulation and experimental characterization of polymer/carbon nanotubes composites for strain sensor applications

2014 ◽  
Vol 116 (5) ◽  
pp. 054307 ◽  
Author(s):  
B. De Vivo ◽  
P. Lamberti ◽  
G. Spinelli ◽  
V. Tucci ◽  
L. Vertuccio ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Strain Sensor ◽  
Experimental Characterization ◽  
Sensor Applications
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