scholarly journals Miniature Diamond-Based Fiber Optic Pressure Sensor with Dual Polymer-Ceramic Adhesives

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2202 ◽  
Author(s):  
Hyungdae Bae ◽  
Ayush Giri ◽  
Oluwafikunwa Kolawole ◽  
Amin Azimi ◽  
Aaron Jackson ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Melting Temperature ◽  
Pressure Sensor ◽  
Fiber Optic ◽  
Young's Modulus ◽  
Industrial Applications ◽  
Harsh Environment ◽  
High Melting ◽  
Uv Curable ◽  
High Melting Temperature

Diamond is a good candidate for harsh environment sensing due to its high melting temperature, Young’s modulus, and thermal conductivity. A sensor made of diamond will be even more promising when combined with some advantages of optical sensing (i.e., EMI inertness, high temperature operation, and miniaturization). We present a miniature diamond-based fiber optic pressure sensor fabricated using dual polymer-ceramic adhesives. The UV curable polymer and the heat-curing ceramic adhesive are employed for easy and reliable optical fiber mounting. The usage of the two different adhesives considerably improves the manufacturability and linearity of the sensor, while significantly decreasing the error from the temperature cross-sensitivity. Experimental study shows that the sensor exhibits good linearity over a pressure range of 2.0–9.5 psi with a sensitivity of 18.5 nm/psi (R2 = 0.9979). Around 275 °C of working temperature was achieved by using polymer/ceramic dual adhesives. The sensor can benefit many fronts that require miniature, low-cost, and high-accuracy sensors including biomedical and industrial applications. With an added antioxidation layer on the diamond diaphragm, the sensor can also be applied for harsh environment applications due to the high melting temperature and Young’s modulus of the material.

Sustainable Chiral Polyamides with High Melting Temperature via Enhanced Anionic Polymerization of a Menthone-Derived Lactam

2016 ◽  
Vol 37 (10) ◽  
pp. 851-857 ◽  
Author(s):  
Malte Winnacker ◽  
Michael Neumeier ◽  
Xiaohan Zhang ◽  
Christine M. Papadakis ◽  
Bernhard Rieger
Keyword(s):  
Melting Temperature ◽  
Anionic Polymerization ◽  
High Melting ◽  
High Melting Temperature

scholarly journals Isolation of RNA from a mixture and its detection by utilizing a microgel-based optical device

2018 ◽  
Vol 96 (12) ◽  
pp. 1079-1086 ◽  
Author(s):  
Molla R. Islam ◽  
Shakiba Azimi ◽  
Faranak Teimoory ◽  
Glen Loppnow ◽  
Michael J. Serpe
Keyword(s):  
Melting Temperature ◽  
Magnetic Beads ◽  
Colorimetric Detection ◽  
Optical Devices ◽  
High Melting ◽  
Dna Duplex ◽  
Dna And Rna ◽  
High Melting Temperature ◽  
Hybrid Duplex ◽  
Fluorescent Studies

In this investigation, we show that RNA can be separated from a solution containing DNA and RNA and the isolated RNA can be detected using poly (N-isopropylacrylamide-co-N-(3-aminopropyl) methacrylamide hydrochloride) microgel-based optical devices (etalons). The isolation of RNA was accomplished by using hairpin-functionalized magnetic beads (MMPDNA) and differential melting, based on the fact that the DNA–RNA hybrid duplex is stronger (i.e., high melting temperature) than the DNA–DNA duplex (i.e., low melting temperature). By performing concurrent etalon sensing and fluorescent studies, we found that the MMPDNA combined with differential melting was capable of selectively separating RNA from DNA. This selective separation and simple colorimetric detection of RNA from a mixture will help lead to future RNA-based disease diagnostic devices.

Fabrication of Be-Ta Ti Alloys without Pre-Alloyed Powders via SLM

2021 ◽  
Vol 1016 ◽  
pp. 1797-1801
Author(s):  
Mitsuharu Todai ◽  
Takeshi Nagase ◽  
Takayoshi Nakano
Keyword(s):  
Young’S Modulus ◽  
Melting Temperature ◽  
Crystallographic Texture ◽  
Crystal Orientation ◽  
Single Phase ◽  
Young's Modulus ◽  
Laser Melting ◽  
Ti Alloys

In this study, we sucsess the fabrication of dense compornent of Ti-20at.%X (X = Cr and Nb) alloys by Selected laser melting (SLM) pwocess, from a mixture of poweder element powders. The volume rasio of pore and non-molten particles is dependent of the enegy density. The difficulty of fabrication of Ti-X alloy comporment is dependent of melting temperature of X element. Thus, Ti-20at.%Cr alloys, which has the lowest melting temperature of X is easier to monufacture of dense comporment. The Ti-20at.%Cr alloys and Ti-20at.%Nb comprise β-Ti single-phase components without any non-molten particles and macroscopic defects. In addtion, the {001}〈100〉 crystallographic texture of these Ti-Cr and Ti-Nb alloys can be controlled effectively by optimizing the SLM parameters. This means that the SLM is key techmelogy of controlling of Young’s modulus and shape at the same time because Young's modulus of be-ta phase in Ti alloys is strongly related to the crystal orientation.

scholarly journals Neutron Multiple Number as a Factor Ruling Both the Abundance and Some Material Properties of Elements

2017 ◽  
Vol 6 (3) ◽  
pp. 37
Author(s):  
Yoshiharu Mae
Keyword(s):  
Thermal Conductivity ◽  
Young’S Modulus ◽  
Melting Temperature ◽  
Material Properties ◽  
Young's Modulus ◽  
Materials Properties ◽  
Unique Pattern ◽  
The Universe

The abundance of elements in the universe was plotted on the TC-YM diagram. The most abundant elements show the unique pattern drawing a quadrant. Next, the neutron multiple number, the number of neutron per proton in the nucleus, was introduced. The neutron multiple numbers of elements show the same pattern as the abundance of elements on the diagram. As a result, the abundance of elements shows a good correlation with neutron multiple numbers of elements. With increasing neutron multiple number, the abundance decreases. Besides, the neutron multiple number relates to the materials properties such as the Young’s modulus, thermal conductivity and melting temperature of elements.

Degradation study of polyester fiber in swimming pool water

2020 ◽  
Vol 91 (1-2) ◽  
pp. 51-61
Author(s):  
Caroline Apoloni Cionek ◽  
Catia Nunes ◽  
Adonilson Freitas ◽  
Natalia Homem ◽  
Edvani Muniz ◽  
...  
Keyword(s):  
Weight Loss ◽  
Young’S Modulus ◽  
Melting Temperature ◽  
Young's Modulus ◽  
Onset Temperature ◽  
Swimming Pool ◽  
Experimental Methodology ◽  
Stress Tests ◽  
Pool Water ◽  
Swimming Pool Water

The disinfection of swimming pool water is vital to maintain water quality. The chemicals used in this practice can damage the fabrics of bathing suits and shorten the shelf life of the textile substrate. The degradation of polyester, a polymer that is widely used in bathing suits for swimming pools, was investigated. For this, a 23 factorial design was employed for the experimental methodology. The effect of several variables was analyzed in a simulated swimming pool batch, such as textile-exposure time, concentration of the used disinfection product, and batch temperature. The response variables were enthalpy of fusion ΔHm, melting temperature and crystallinity (obtained by differential scanning calorimetry), percentage of weight loss, temperature of maximum rate of weight loss, onset temperature and endset temperature (measured through thermogravimetric analysis), and Young's modulus values (measured in strain-stress tests in the row and column directions). The factors of temperature, time, and the concentration of disinfectant were significant for melting temperature, crystallinity, onset temperature, and Young's modulus for columns. The analyses of variance were obtained using software Design-Expert DX7. Attenuated total reflectance-Fourier transform infrared spectroscopy analysis showed changes in band intensities at 695 cm−1, which were attributed to ester groups, as well as a decrease of the carbonyl band at 1712 cm−1, which was attributed to the hydrolysis of the material. Analysis through scanning electronic microscopy images showed the appearance of stretch marks in the constituent filaments of the tested textiles, which suggests a surface degradation occurred.

The anomalously high melting temperature of bilayer ice

2010 ◽  
Vol 132 (12) ◽  
pp. 124511 ◽  
Author(s):  
Noah Kastelowitz ◽  
Jessica C. Johnston ◽  
Valeria Molinero
Keyword(s):  
Melting Temperature ◽  
High Melting ◽  
High Melting Temperature

scholarly journals Mechanical vibration responses of snow samples near the melting temperature

2004 ◽  
Vol 38 ◽  
pp. 130-134 ◽  
Author(s):  
Iwao Takei ◽  
Norikazu Maeno
Keyword(s):  
Elastic Wave ◽  
Young’S Modulus ◽  
Melting Temperature ◽  
Poisson’S Ratio ◽  
Young's Modulus ◽  
Temperature Cycling ◽  
Poisson's Ratio ◽  
Wave Velocities ◽  
Ice Particles ◽  
Snow Samples

AbstractMechanical properties of snow were investigated by means of a vibration response technique in a frequency range from 10Hz to 1MHz and a temperature range from –15° to –0.1°C with heating and cooling processes. The response signals were divided into two kinds of propagation, transverse and longitudinal waves through the snow sample. The temperature dependence of elastic-wave velocities showed a large decrease above –0.6°C. Poisson’s ratio and Young’s modulus of snow samples were derived from the longitudinal and transverse wave velocities. Poisson’s ratio of snow samples showed a value of 0.35 ± 0.01 below –0.6°C, and dropped to 0.29 or less at –0.1°C. Young’s modulus of snow samples at –0.1°C showed values seven-tenths as large as (25–34%less than) those below –0.6°C. These phenomena suggest weakening and slipping of boundaries between ice particles in snow samples near the melting temperature. The elastic-wave velocities and Young’s modulus change with the density of samples and with time and temperature cycling. These changes are related to the number and state of bonds between ice particles in snow samples.

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