The Experts below are selected from a list of 162 Experts worldwide ranked by ideXlab platform
Ray H Baughman - One of the best experts on this subject based on the ideXlab platform.
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Ultrafast charge and discharge biscrolled Yarn supercapacitors for textiles and microdevices
Nature Communications, 2013Co-Authors: Jae Ah Lee, Hyun U. Cho, Gordon George Wallace, Xavier Lepró, Min Kyoon Shin, Mikhail E Kozlov, Shi Hyeong Kim, Marcio D Lima, Geoffrey M. Spinks, Ray H BaughmanAbstract:Strong, flexible supercapacitors are desirable for miniaturized electronic devices, but realizing a combination of high energy and power density is challenging. Lee et al . address this with a demonstration of high-performance supercapacitor Yarns that could be useful for electronic textiles. Flexible, wearable, implantable and easily reconfigurable supercapacitors delivering high energy and power densities are needed for electronic devices. Here we demonstrate weavable, sewable, knottable and braidable Yarns that function as high performance electrodes of redox supercapacitors. A novel technology, gradient biscrolling, provides fast-ion-transport Yarn in which hundreds of layers of conducting-polymer-infiltrated carbon nanotube sheet are scrolled into ~20 μm diameter Yarn. Plying the biscrolled Yarn with a metal wire current collector increases power generation capabilities. The volumetric capacitance is high (up to ~179 F cm^−3) and the discharge current of the Plied Yarn supercapacitor linearly increases with voltage scan rate up to ~80 V s^−1 and ~20 V s^−1 for liquid and solid electrolytes, respectively. The exceptionally high energy and power densities for the complete supercapacitor, and high cycle life that little depends on winding or sewing (92%, 99% after 10,000 cycles, respectively) are important for the applications in electronic textiles.
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Ultrafast charge and discharge biscrolled Yarn supercapacitors for textiles and microdevices
Nature Communications, 2013Co-Authors: Jae Ah Lee, Hyun U. Cho, Gordon George Wallace, Xavier Lepró, Min Kyoon Shin, Mikhail E Kozlov, Shi Hyeong Kim, Marcio D Lima, Ray H BaughmanAbstract:Flexible, wearable, implantable and easily reconfigurable supercapacitors delivering high energy and power densities are needed for electronic devices. Here we demonstrate weavable, sewable, knottable and braidable Yarns that function as high performance electrodes of redox supercapacitors. A novel technology, gradient biscrolling, provides fast-ion-transport Yarn in which hundreds of layers of conducting-polymer-infiltrated carbon nanotube sheet are scrolled into ~20 μm diameter Yarn. Plying the biscrolled Yarn with a metal wire current collector increases power generation capabilities. The volumetric capacitance is high (up to ~179 F cm(-3)) and the discharge current of the Plied Yarn supercapacitor linearly increases with voltage scan rate up to ~80 V s(-1) and ~20 V s(-1) for liquid and solid electrolytes, respectively. The exceptionally high energy and power densities for the complete supercapacitor, and high cycle life that little depends on winding or sewing (92%, 99% after 10,000 cycles, respectively) are important for the applications in electronic textiles.
Jae Ah Lee - One of the best experts on this subject based on the ideXlab platform.
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Ultrafast charge and discharge biscrolled Yarn supercapacitors for textiles and microdevices
Nature Communications, 2013Co-Authors: Jae Ah Lee, Hyun U. Cho, Gordon George Wallace, Xavier Lepró, Min Kyoon Shin, Mikhail E Kozlov, Shi Hyeong Kim, Marcio D Lima, Geoffrey M. Spinks, Ray H BaughmanAbstract:Strong, flexible supercapacitors are desirable for miniaturized electronic devices, but realizing a combination of high energy and power density is challenging. Lee et al . address this with a demonstration of high-performance supercapacitor Yarns that could be useful for electronic textiles. Flexible, wearable, implantable and easily reconfigurable supercapacitors delivering high energy and power densities are needed for electronic devices. Here we demonstrate weavable, sewable, knottable and braidable Yarns that function as high performance electrodes of redox supercapacitors. A novel technology, gradient biscrolling, provides fast-ion-transport Yarn in which hundreds of layers of conducting-polymer-infiltrated carbon nanotube sheet are scrolled into ~20 μm diameter Yarn. Plying the biscrolled Yarn with a metal wire current collector increases power generation capabilities. The volumetric capacitance is high (up to ~179 F cm^−3) and the discharge current of the Plied Yarn supercapacitor linearly increases with voltage scan rate up to ~80 V s^−1 and ~20 V s^−1 for liquid and solid electrolytes, respectively. The exceptionally high energy and power densities for the complete supercapacitor, and high cycle life that little depends on winding or sewing (92%, 99% after 10,000 cycles, respectively) are important for the applications in electronic textiles.
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Ultrafast charge and discharge biscrolled Yarn supercapacitors for textiles and microdevices
Nature Communications, 2013Co-Authors: Jae Ah Lee, Hyun U. Cho, Gordon George Wallace, Xavier Lepró, Min Kyoon Shin, Mikhail E Kozlov, Shi Hyeong Kim, Marcio D Lima, Ray H BaughmanAbstract:Flexible, wearable, implantable and easily reconfigurable supercapacitors delivering high energy and power densities are needed for electronic devices. Here we demonstrate weavable, sewable, knottable and braidable Yarns that function as high performance electrodes of redox supercapacitors. A novel technology, gradient biscrolling, provides fast-ion-transport Yarn in which hundreds of layers of conducting-polymer-infiltrated carbon nanotube sheet are scrolled into ~20 μm diameter Yarn. Plying the biscrolled Yarn with a metal wire current collector increases power generation capabilities. The volumetric capacitance is high (up to ~179 F cm(-3)) and the discharge current of the Plied Yarn supercapacitor linearly increases with voltage scan rate up to ~80 V s(-1) and ~20 V s(-1) for liquid and solid electrolytes, respectively. The exceptionally high energy and power densities for the complete supercapacitor, and high cycle life that little depends on winding or sewing (92%, 99% after 10,000 cycles, respectively) are important for the applications in electronic textiles.
Jia-horng Lin - One of the best experts on this subject based on the ideXlab platform.
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Polyester/Polylactic Acid/Stainless Steel Composite Bone Scaffolds Made by Electrochemical Treatment: Process Design and Property Evaluations
Fibers and Polymers, 2019Co-Authors: Mei-chen Lin, Ching Wen Lou, Shih Peng Wen, Jan-yi Lin, Ting An Lin, Jia-horng LinAbstract:This study combines and twists 75D polyester (PET) multi-filaments and polylactic acid (PLA) multi-filaments with twist coefficients of 2, 3, 4, 5, and 6 to form 150D PET/PLA Plied Yarns. The 0.08-mm-diameter stainless steel (SS) fibers are made into SS braids with a 60-tooth braid gear and a take-up gear with 60, 70, 80, 90, or 100 teeth. PET/PLA Plied Yarn and SS braids are then combined and electrochemically treated with an electric current of 100, 200, 300, 400, or 500 mA at 60 °C for 24 hours, forming the PET/PLA/SS composite bone scaffolds. PET/PLA/SS composite bone scaffolds are observed by scanning electron microscope (SEM) and energy dispersive spectroscope (EDS), and tested for weight increase rate and biocompatibility. The experiment results show that the optimal twist coefficient for PET/PLA Plied Yarn is 4 and the optimal tooth number on the take-up gear for SS braids is 80. SEM observation result shows that hydroxyapatite (HA) deposits on the surface of PET/PLA/SS composite bone scaffolds and attaches to the PET/PLA Plied Yarns. Finally, regardless of electric currents, all PET/PLA/SS composite bone scaffolds possess good biocompatibility.
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Effects of Tooth Number of Drive Gear on Mechanical Properties of Polypropylene/Polyester Composite Tubular Knits
Applied Mechanics and Materials, 2013Co-Authors: Ching Wen Lou, Jin Mao Chen, Chien Teng Hsieh, Jia-horng LinAbstract:The severe global climate changes result in consecutive torrential rains in rainy season, and causes water loss and soil erosion. For an effective water and soil conservation, geotextiles are commonly used in geotechnical engineering. Geotextiles should able to isolate soil, filter water, and reinforce the soil; therefore, the material for geotextiles should be acid-resistant and alkali-resistant, such as polypropylene (PP) and polyester (PET). This study uses PP fibers as the skin and PET Plied Yarns as the core to form PP/PET composite tubular knits on a cord knitting machine. The PET Plied Yarn is fed with a specified tensile strength, and only the tooth number of the drive gear varies. Mechanical property test results show that a drive gear of 30 teeth increases the tensile strength of the resulting tubular knits; however, with a drive gear of 35 teeth, the tensile strength decreases. An optimal core coverage occurs with a drive gear of 30 teeth.
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preliminary study of the application of pet knitted fabrics in artificial bone scaffold
Applied Mechanics and Materials, 2012Co-Authors: Ching Wen Lou, Jia-horng Lin, Wencheng ChenAbstract:Having good mechanical strength, biocompatibility, and workability, polyethylene terephthalate (PET) is often used as a biomaterial. In this study, PET filaments with various deniers are made into Plied Yarn with various coefficients of twist. The Plied Yarn is then made into PET knitted fabrics. Mechanical property tests are performed to determine the differences among the various PET knitted fabrics. Finally, by using cell culture, the PET knitted fabrics are analyzed and evaluated with their cell attachment.
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Polyester Bone Scaffolds Using Polymer Adhesives
Advanced Materials Research, 2012Co-Authors: Ching Wen Lou, Ming Shiuan Tsai, Shih Peng Wen, Chien-lin Huang, Jia-horng LinAbstract:This study creates a PET bone scaffolds with a stabilized structure. With various twists per inch (TPI), 150 denier polyester (PET) filaments are twisted into Plied Yarn, after which the optimal Plied Yarn is braided into PET bone scaffolds. The Plied Yarn is evaluated for mechanical properties to determine the optimal TPI. The maximum elongation of the Plied Yarn occurs when the TPI is at its optimal, 9. The PET bone scaffolds are immersed in sodium alginate (SA) solution and CaCl2 solution, respectively, and then observed by a stereomicroscope and evaluated for porosity. The surface observation of PET bone scaffolds indicates that the immersion leads to the adhesion of filaments and consequent, their compact arrangement, which results in a lower porosity of the bone scaffolds, but a greater tensile strength.
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Polylactic Acid Bone Scaffolds Made by Heat Treatment
Advanced Materials Research, 2012Co-Authors: Jia-horng Lin, Shih Peng Wen, Hsiu Ying Chung, Ching Wen LouAbstract:Polylactic acid (PLA) has a widespread application, such as bone scaffolds, in biomedical field. This study creates PLA bone scaffolds, which has a structural stability, by using 150 denier (D) PLA Plied Yarn. 75 D PLA filaments are combined and then twisted into Plied Yarn. During the twisting process, the twists per inch (TPI) are varied. The resulting Plied Yarn undergoes heat treatment, and then is evaluated with mechanical property tests, determining an optimal TPI of 9. The Plied Yarn is then braided into PLA bone scaffolds. PLA bone scaffolds, thermally treated or not, are observed by a stereomicroscope and tested for porosity and tensile strength. According to test results, the optimal TPI is 9, which results from the optimal tensile strength. However, the variation in elongation of various 150 D Plied Yarn is not significant. When observed by a stereomicroscope, PLA bone scaffolds, which are thermally treated, have a compact filament arrangement. This is due to thermal bonding between filaments; in addition, the heat treatment duration is short, so the PLA filaments are not melted completely, resulting in a stable, hollow structure. According to porosity and tensile strength test, PLA bone scaffolds that are thermally treated exhibit a lower porosity and tensile strength due to the compact arrangement and tender phenomenon of the filaments. As a result, the optimal PLA bone scaffolds are made of 150 D Plied with a TPI of 9, followed by a heat treatment at 165 °C for ten minutes.
Xavier Lepró - One of the best experts on this subject based on the ideXlab platform.
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Ultrafast charge and discharge biscrolled Yarn supercapacitors for textiles and microdevices
Nature Communications, 2013Co-Authors: Jae Ah Lee, Hyun U. Cho, Gordon George Wallace, Xavier Lepró, Min Kyoon Shin, Mikhail E Kozlov, Shi Hyeong Kim, Marcio D Lima, Geoffrey M. Spinks, Ray H BaughmanAbstract:Strong, flexible supercapacitors are desirable for miniaturized electronic devices, but realizing a combination of high energy and power density is challenging. Lee et al . address this with a demonstration of high-performance supercapacitor Yarns that could be useful for electronic textiles. Flexible, wearable, implantable and easily reconfigurable supercapacitors delivering high energy and power densities are needed for electronic devices. Here we demonstrate weavable, sewable, knottable and braidable Yarns that function as high performance electrodes of redox supercapacitors. A novel technology, gradient biscrolling, provides fast-ion-transport Yarn in which hundreds of layers of conducting-polymer-infiltrated carbon nanotube sheet are scrolled into ~20 μm diameter Yarn. Plying the biscrolled Yarn with a metal wire current collector increases power generation capabilities. The volumetric capacitance is high (up to ~179 F cm^−3) and the discharge current of the Plied Yarn supercapacitor linearly increases with voltage scan rate up to ~80 V s^−1 and ~20 V s^−1 for liquid and solid electrolytes, respectively. The exceptionally high energy and power densities for the complete supercapacitor, and high cycle life that little depends on winding or sewing (92%, 99% after 10,000 cycles, respectively) are important for the applications in electronic textiles.
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Ultrafast charge and discharge biscrolled Yarn supercapacitors for textiles and microdevices
Nature Communications, 2013Co-Authors: Jae Ah Lee, Hyun U. Cho, Gordon George Wallace, Xavier Lepró, Min Kyoon Shin, Mikhail E Kozlov, Shi Hyeong Kim, Marcio D Lima, Ray H BaughmanAbstract:Flexible, wearable, implantable and easily reconfigurable supercapacitors delivering high energy and power densities are needed for electronic devices. Here we demonstrate weavable, sewable, knottable and braidable Yarns that function as high performance electrodes of redox supercapacitors. A novel technology, gradient biscrolling, provides fast-ion-transport Yarn in which hundreds of layers of conducting-polymer-infiltrated carbon nanotube sheet are scrolled into ~20 μm diameter Yarn. Plying the biscrolled Yarn with a metal wire current collector increases power generation capabilities. The volumetric capacitance is high (up to ~179 F cm(-3)) and the discharge current of the Plied Yarn supercapacitor linearly increases with voltage scan rate up to ~80 V s(-1) and ~20 V s(-1) for liquid and solid electrolytes, respectively. The exceptionally high energy and power densities for the complete supercapacitor, and high cycle life that little depends on winding or sewing (92%, 99% after 10,000 cycles, respectively) are important for the applications in electronic textiles.
Min Kyoon Shin - One of the best experts on this subject based on the ideXlab platform.
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Ultrafast charge and discharge biscrolled Yarn supercapacitors for textiles and microdevices
Nature Communications, 2013Co-Authors: Jae Ah Lee, Hyun U. Cho, Gordon George Wallace, Xavier Lepró, Min Kyoon Shin, Mikhail E Kozlov, Shi Hyeong Kim, Marcio D Lima, Geoffrey M. Spinks, Ray H BaughmanAbstract:Strong, flexible supercapacitors are desirable for miniaturized electronic devices, but realizing a combination of high energy and power density is challenging. Lee et al . address this with a demonstration of high-performance supercapacitor Yarns that could be useful for electronic textiles. Flexible, wearable, implantable and easily reconfigurable supercapacitors delivering high energy and power densities are needed for electronic devices. Here we demonstrate weavable, sewable, knottable and braidable Yarns that function as high performance electrodes of redox supercapacitors. A novel technology, gradient biscrolling, provides fast-ion-transport Yarn in which hundreds of layers of conducting-polymer-infiltrated carbon nanotube sheet are scrolled into ~20 μm diameter Yarn. Plying the biscrolled Yarn with a metal wire current collector increases power generation capabilities. The volumetric capacitance is high (up to ~179 F cm^−3) and the discharge current of the Plied Yarn supercapacitor linearly increases with voltage scan rate up to ~80 V s^−1 and ~20 V s^−1 for liquid and solid electrolytes, respectively. The exceptionally high energy and power densities for the complete supercapacitor, and high cycle life that little depends on winding or sewing (92%, 99% after 10,000 cycles, respectively) are important for the applications in electronic textiles.
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Ultrafast charge and discharge biscrolled Yarn supercapacitors for textiles and microdevices
Nature Communications, 2013Co-Authors: Jae Ah Lee, Hyun U. Cho, Gordon George Wallace, Xavier Lepró, Min Kyoon Shin, Mikhail E Kozlov, Shi Hyeong Kim, Marcio D Lima, Ray H BaughmanAbstract:Flexible, wearable, implantable and easily reconfigurable supercapacitors delivering high energy and power densities are needed for electronic devices. Here we demonstrate weavable, sewable, knottable and braidable Yarns that function as high performance electrodes of redox supercapacitors. A novel technology, gradient biscrolling, provides fast-ion-transport Yarn in which hundreds of layers of conducting-polymer-infiltrated carbon nanotube sheet are scrolled into ~20 μm diameter Yarn. Plying the biscrolled Yarn with a metal wire current collector increases power generation capabilities. The volumetric capacitance is high (up to ~179 F cm(-3)) and the discharge current of the Plied Yarn supercapacitor linearly increases with voltage scan rate up to ~80 V s(-1) and ~20 V s(-1) for liquid and solid electrolytes, respectively. The exceptionally high energy and power densities for the complete supercapacitor, and high cycle life that little depends on winding or sewing (92%, 99% after 10,000 cycles, respectively) are important for the applications in electronic textiles.