The Experts below are selected from a list of 27228 Experts worldwide ranked by ideXlab platform
Hyounee Kim - One of the best experts on this subject based on the ideXlab platform.
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porous calcium phosphate ceramic scaffolds with tailored pore orientations and mechanical properties using lithography based ceramic 3d Printing Technique
Materials, 2018Co-Authors: Jung Bin Lee, Woo Youl Maeng, Young Hag Koh, Hyounee KimAbstract:This study demonstrates the usefulness of the lithography-based ceramic 3-dimensional Printing Technique with a specifically designed top-down process for the production of porous calcium phosphate (CaP) ceramic scaffolds with tailored pore orientations and mechanical properties. The processing parameters including the preparation of a photocurable CaP slurry with a high solid loading (φ = 45 vol%), the exposure time for photocuring process, and the initial designs of the porous scaffolds were carefully controlled. Three types of porous CaP scaffolds with different pore orientations (i.e., 0°/90°, 0°/45°/90°/135°, and 0°/30°/60°/90°/120°/150°) were produced. All the scaffolds exhibited a tightly controlled porous structure with straight CaP frameworks arranged in a periodic pattern while the porosity was kept constant. The porous CaP scaffold with a pore orientation of 0°/90° demonstrated the highest compressive strength and modulus due to a number of CaP frameworks parallel to the loading direction. On the other hand, scaffolds with multiple pore orientations may exhibit more isotropic mechanical properties regardless of the loading directions. The porous CaP scaffolds exhibited an excellent in vitro apatite-forming ability in a stimulated body fluid (SBF) solution. These findings suggest that porous CaP scaffolds with tailored pore orientations may provide tunable mechanical properties with good bone regeneration ability.
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Porous Calcium Phosphate Ceramic Scaffolds with Tailored Pore Orientations and Mechanical Properties Using Lithography-Based Ceramic 3D Printing Technique
MDPI AG, 2018Co-Authors: Jung Bin Lee, Woo Youl Maeng, Young Hag Koh, Hyounee KimAbstract:This study demonstrates the usefulness of the lithography-based ceramic 3-dimensional Printing Technique with a specifically designed top-down process for the production of porous calcium phosphate (CaP) ceramic scaffolds with tailored pore orientations and mechanical properties. The processing parameters including the preparation of a photocurable CaP slurry with a high solid loading (φ = 45 vol%), the exposure time for photocuring process, and the initial designs of the porous scaffolds were carefully controlled. Three types of porous CaP scaffolds with different pore orientations (i.e., 0°/90°, 0°/45°/90°/135°, and 0°/30°/60°/90°/120°/150°) were produced. All the scaffolds exhibited a tightly controlled porous structure with straight CaP frameworks arranged in a periodic pattern while the porosity was kept constant. The porous CaP scaffold with a pore orientation of 0°/90° demonstrated the highest compressive strength and modulus due to a number of CaP frameworks parallel to the loading direction. On the other hand, scaffolds with multiple pore orientations may exhibit more isotropic mechanical properties regardless of the loading directions. The porous CaP scaffolds exhibited an excellent in vitro apatite-forming ability in a stimulated body fluid (SBF) solution. These findings suggest that porous CaP scaffolds with tailored pore orientations may provide tunable mechanical properties with good bone regeneration ability
Toshikazu Yamada - One of the best experts on this subject based on the ideXlab platform.
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nanoparticle chemisorption Printing Technique for conductive silver patterning with submicron resolution
Nature Communications, 2016Co-Authors: Toshikazu Yamada, Katsuo Fukuhara, Shunto Arai, Jun'ya Tsutsumi, Hiromi Minemawari, Ken Matsuoka, Keisuke Aoshima, Nobuko Fukuda, Yuichi MakitaAbstract:Silver nanocolloid, a dense suspension of ligand-encapsulated silver nanoparticles, is an important material for Printing-based device production technologies. However, printed conductive patterns of sufficiently high quality and resolution for industrial products have not yet been achieved, as the use of conventional Printing Techniques is severely limiting. Here we report a Printing Technique to manufacture ultrafine conductive patterns utilizing the exclusive chemisorption phenomenon of weakly encapsulated silver nanoparticles on a photoactivated surface. The process includes masked irradiation of vacuum ultraviolet light on an amorphous perfluorinated polymer layer to photoactivate the surface with pendant carboxylate groups, and subsequent coating of alkylamine-encapsulated silver nanocolloids, which causes amine–carboxylate conversion to trigger the spontaneous formation of a self-fused solid silver layer. The Technique can produce silver patterns of submicron fineness adhered strongly to substrates, thus enabling manufacture of flexible transparent conductive sheets. This Printing Technique could replace conventional vacuum- and photolithography-based device processing. Silver nanocolloids are promising materials for printed electronic technologies. Here, the authors manufacture ultrafine conductive patterns utilizing the exclusive chemisorption of weakly encapsulated silver nanocolloids on a photoactivated surface.
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Nanoparticle chemisorption Printing Technique for conductive silver patterning with submicron resolution
Nature Communications, 2016Co-Authors: Toshikazu Yamada, Katsuo Fukuhara, Shunto Arai, Yuichi Makita, Jun'ya Tsutsumi, Hiromi Minemawari, Ken Matsuoka, Keisuke Aoshima, Nobuko Fukuda, Hitoshi KuboAbstract:Silver nanocolloid, a dense suspension of ligand-encapsulated silver nanoparticles, is an important material for Printing-based device production technologies. However, printed conductive patterns of sufficiently high quality and resolution for industrial products have not yet been achieved, as the use of conventional Printing Techniques is severely limiting. Here we report a Printing Technique to manufacture ultrafine conductive patterns utilizing the exclusive chemisorption phenomenon of weakly encapsulated silver nanoparticles on a photoactivated surface. The process includes masked irradiation of vacuum ultraviolet light on an amorphous perfluorinated polymer layer to photoactivate the surface with pendant carboxylate groups, and subsequent coating of alkylamine-encapsulated silver nanocolloids, which causes amine-carboxylate conversion to trigger the spontaneous formation of a self-fused solid silver layer. The Technique can produce silver patterns of submicron fineness adhered strongly to substrates, thus enabling manufacture of flexible transparent conductive sheets. This Printing Technique could replace conventional vacuum- and photolithography-based device processing.
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Ink-jet Printing of organic metal electrodes using charge-transfer compounds
Applied Physics Letters, 2006Co-Authors: Maki Hiraoka, Tatsuo Hasegawa, Y. Abe, Toshikazu Yamada, Yasuhiro Tokura, Hideki Yamochi, Gunzi Saito, Tomoyuki Akutagawa, Takayoshi NakamuraAbstract:In this work the authors fabricated patterned thin films made of highly conductive organic charge-transfer complexes using the ink-jet Printing Technique. The overprinted films of BO9(C14-TCNQ)4 exhibit low sheet resistivity and are available for carrier injection and interconnection of organic field-effect transistors (FETs). The performance of pentacene thin film FETs, where the top contact and bottom contact are ink-jet-printed organic electrodes, demonstrates the potential of organic/organic heterointerfaces.
Yuichi Makita - One of the best experts on this subject based on the ideXlab platform.
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nanoparticle chemisorption Printing Technique for conductive silver patterning with submicron resolution
Nature Communications, 2016Co-Authors: Toshikazu Yamada, Katsuo Fukuhara, Shunto Arai, Jun'ya Tsutsumi, Hiromi Minemawari, Ken Matsuoka, Keisuke Aoshima, Nobuko Fukuda, Yuichi MakitaAbstract:Silver nanocolloid, a dense suspension of ligand-encapsulated silver nanoparticles, is an important material for Printing-based device production technologies. However, printed conductive patterns of sufficiently high quality and resolution for industrial products have not yet been achieved, as the use of conventional Printing Techniques is severely limiting. Here we report a Printing Technique to manufacture ultrafine conductive patterns utilizing the exclusive chemisorption phenomenon of weakly encapsulated silver nanoparticles on a photoactivated surface. The process includes masked irradiation of vacuum ultraviolet light on an amorphous perfluorinated polymer layer to photoactivate the surface with pendant carboxylate groups, and subsequent coating of alkylamine-encapsulated silver nanocolloids, which causes amine–carboxylate conversion to trigger the spontaneous formation of a self-fused solid silver layer. The Technique can produce silver patterns of submicron fineness adhered strongly to substrates, thus enabling manufacture of flexible transparent conductive sheets. This Printing Technique could replace conventional vacuum- and photolithography-based device processing. Silver nanocolloids are promising materials for printed electronic technologies. Here, the authors manufacture ultrafine conductive patterns utilizing the exclusive chemisorption of weakly encapsulated silver nanocolloids on a photoactivated surface.
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Nanoparticle chemisorption Printing Technique for conductive silver patterning with submicron resolution
Nature Communications, 2016Co-Authors: Toshikazu Yamada, Katsuo Fukuhara, Shunto Arai, Yuichi Makita, Jun'ya Tsutsumi, Hiromi Minemawari, Ken Matsuoka, Keisuke Aoshima, Nobuko Fukuda, Hitoshi KuboAbstract:Silver nanocolloid, a dense suspension of ligand-encapsulated silver nanoparticles, is an important material for Printing-based device production technologies. However, printed conductive patterns of sufficiently high quality and resolution for industrial products have not yet been achieved, as the use of conventional Printing Techniques is severely limiting. Here we report a Printing Technique to manufacture ultrafine conductive patterns utilizing the exclusive chemisorption phenomenon of weakly encapsulated silver nanoparticles on a photoactivated surface. The process includes masked irradiation of vacuum ultraviolet light on an amorphous perfluorinated polymer layer to photoactivate the surface with pendant carboxylate groups, and subsequent coating of alkylamine-encapsulated silver nanocolloids, which causes amine-carboxylate conversion to trigger the spontaneous formation of a self-fused solid silver layer. The Technique can produce silver patterns of submicron fineness adhered strongly to substrates, thus enabling manufacture of flexible transparent conductive sheets. This Printing Technique could replace conventional vacuum- and photolithography-based device processing.
Keisuke Aoshima - One of the best experts on this subject based on the ideXlab platform.
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nanoparticle chemisorption Printing Technique for conductive silver patterning with submicron resolution
Nature Communications, 2016Co-Authors: Toshikazu Yamada, Katsuo Fukuhara, Shunto Arai, Jun'ya Tsutsumi, Hiromi Minemawari, Ken Matsuoka, Keisuke Aoshima, Nobuko Fukuda, Yuichi MakitaAbstract:Silver nanocolloid, a dense suspension of ligand-encapsulated silver nanoparticles, is an important material for Printing-based device production technologies. However, printed conductive patterns of sufficiently high quality and resolution for industrial products have not yet been achieved, as the use of conventional Printing Techniques is severely limiting. Here we report a Printing Technique to manufacture ultrafine conductive patterns utilizing the exclusive chemisorption phenomenon of weakly encapsulated silver nanoparticles on a photoactivated surface. The process includes masked irradiation of vacuum ultraviolet light on an amorphous perfluorinated polymer layer to photoactivate the surface with pendant carboxylate groups, and subsequent coating of alkylamine-encapsulated silver nanocolloids, which causes amine–carboxylate conversion to trigger the spontaneous formation of a self-fused solid silver layer. The Technique can produce silver patterns of submicron fineness adhered strongly to substrates, thus enabling manufacture of flexible transparent conductive sheets. This Printing Technique could replace conventional vacuum- and photolithography-based device processing. Silver nanocolloids are promising materials for printed electronic technologies. Here, the authors manufacture ultrafine conductive patterns utilizing the exclusive chemisorption of weakly encapsulated silver nanocolloids on a photoactivated surface.
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Nanoparticle chemisorption Printing Technique for conductive silver patterning with submicron resolution
Nature Communications, 2016Co-Authors: Toshikazu Yamada, Katsuo Fukuhara, Shunto Arai, Yuichi Makita, Jun'ya Tsutsumi, Hiromi Minemawari, Ken Matsuoka, Keisuke Aoshima, Nobuko Fukuda, Hitoshi KuboAbstract:Silver nanocolloid, a dense suspension of ligand-encapsulated silver nanoparticles, is an important material for Printing-based device production technologies. However, printed conductive patterns of sufficiently high quality and resolution for industrial products have not yet been achieved, as the use of conventional Printing Techniques is severely limiting. Here we report a Printing Technique to manufacture ultrafine conductive patterns utilizing the exclusive chemisorption phenomenon of weakly encapsulated silver nanoparticles on a photoactivated surface. The process includes masked irradiation of vacuum ultraviolet light on an amorphous perfluorinated polymer layer to photoactivate the surface with pendant carboxylate groups, and subsequent coating of alkylamine-encapsulated silver nanocolloids, which causes amine-carboxylate conversion to trigger the spontaneous formation of a self-fused solid silver layer. The Technique can produce silver patterns of submicron fineness adhered strongly to substrates, thus enabling manufacture of flexible transparent conductive sheets. This Printing Technique could replace conventional vacuum- and photolithography-based device processing.
Jung Bin Lee - One of the best experts on this subject based on the ideXlab platform.
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porous calcium phosphate ceramic scaffolds with tailored pore orientations and mechanical properties using lithography based ceramic 3d Printing Technique
Materials, 2018Co-Authors: Jung Bin Lee, Woo Youl Maeng, Young Hag Koh, Hyounee KimAbstract:This study demonstrates the usefulness of the lithography-based ceramic 3-dimensional Printing Technique with a specifically designed top-down process for the production of porous calcium phosphate (CaP) ceramic scaffolds with tailored pore orientations and mechanical properties. The processing parameters including the preparation of a photocurable CaP slurry with a high solid loading (φ = 45 vol%), the exposure time for photocuring process, and the initial designs of the porous scaffolds were carefully controlled. Three types of porous CaP scaffolds with different pore orientations (i.e., 0°/90°, 0°/45°/90°/135°, and 0°/30°/60°/90°/120°/150°) were produced. All the scaffolds exhibited a tightly controlled porous structure with straight CaP frameworks arranged in a periodic pattern while the porosity was kept constant. The porous CaP scaffold with a pore orientation of 0°/90° demonstrated the highest compressive strength and modulus due to a number of CaP frameworks parallel to the loading direction. On the other hand, scaffolds with multiple pore orientations may exhibit more isotropic mechanical properties regardless of the loading directions. The porous CaP scaffolds exhibited an excellent in vitro apatite-forming ability in a stimulated body fluid (SBF) solution. These findings suggest that porous CaP scaffolds with tailored pore orientations may provide tunable mechanical properties with good bone regeneration ability.
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Porous Calcium Phosphate Ceramic Scaffolds with Tailored Pore Orientations and Mechanical Properties Using Lithography-Based Ceramic 3D Printing Technique
MDPI AG, 2018Co-Authors: Jung Bin Lee, Woo Youl Maeng, Young Hag Koh, Hyounee KimAbstract:This study demonstrates the usefulness of the lithography-based ceramic 3-dimensional Printing Technique with a specifically designed top-down process for the production of porous calcium phosphate (CaP) ceramic scaffolds with tailored pore orientations and mechanical properties. The processing parameters including the preparation of a photocurable CaP slurry with a high solid loading (φ = 45 vol%), the exposure time for photocuring process, and the initial designs of the porous scaffolds were carefully controlled. Three types of porous CaP scaffolds with different pore orientations (i.e., 0°/90°, 0°/45°/90°/135°, and 0°/30°/60°/90°/120°/150°) were produced. All the scaffolds exhibited a tightly controlled porous structure with straight CaP frameworks arranged in a periodic pattern while the porosity was kept constant. The porous CaP scaffold with a pore orientation of 0°/90° demonstrated the highest compressive strength and modulus due to a number of CaP frameworks parallel to the loading direction. On the other hand, scaffolds with multiple pore orientations may exhibit more isotropic mechanical properties regardless of the loading directions. The porous CaP scaffolds exhibited an excellent in vitro apatite-forming ability in a stimulated body fluid (SBF) solution. These findings suggest that porous CaP scaffolds with tailored pore orientations may provide tunable mechanical properties with good bone regeneration ability
