T. Chiu, Chien-Hung Chen, Heng-Yi Shih, H. Chang, Yao-Ming Wang, S. Sakthinathan
In this study, Pr2CuO4 was fabricated as a cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs) application. The Pr2CuO4 cathode was prepared using a solid-state reaction and an electrospinning technique. The prepared cathode material was characterized by the suitable characterization technique. The Pr2CuO4 was coated on a Sm0.2Ce0.8O1.9 (SDC20) pellet with a doctor blades to form a half-cell (Ag/Pr2CuO4/SDC20/Ag). The Pr2CuO4 cathode prepared using electrospinning method demonstrated an excellent cathode performance in electrochemical measurements. The fiber morphologies of the cathode induced large amounts of triple phase boundaries, which promoted oxygen diffusion on the surface. The lowest area-specific resistance obtained with the Pr2CuO4 fiber was determined to be 0.35 Ω cm2 at 800°C in air. The electrospinning prepared Pr2CuO4 fiber is a potential cathode material for IT-SOFCs.
{"title":"Electrospinning of Pr 2 CuO 4 Fiber and its Cathode Application in Solid Oxide Fuel Cell","authors":"T. Chiu, Chien-Hung Chen, Heng-Yi Shih, H. Chang, Yao-Ming Wang, S. Sakthinathan","doi":"10.14723/TMRSJ.43.43","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.43","url":null,"abstract":"In this study, Pr2CuO4 was fabricated as a cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs) application. The Pr2CuO4 cathode was prepared using a solid-state reaction and an electrospinning technique. The prepared cathode material was characterized by the suitable characterization technique. The Pr2CuO4 was coated on a Sm0.2Ce0.8O1.9 (SDC20) pellet with a doctor blades to form a half-cell (Ag/Pr2CuO4/SDC20/Ag). The Pr2CuO4 cathode prepared using electrospinning method demonstrated an excellent cathode performance in electrochemical measurements. The fiber morphologies of the cathode induced large amounts of triple phase boundaries, which promoted oxygen diffusion on the surface. The lowest area-specific resistance obtained with the Pr2CuO4 fiber was determined to be 0.35 Ω cm2 at 800°C in air. The electrospinning prepared Pr2CuO4 fiber is a potential cathode material for IT-SOFCs.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"35 1","pages":"43-47"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84590180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A pulley-type SMA heat-engine using Ti-Ni shape memory alloy (SMA) driven by lowtemperature waste heat energy was investigated. We have proposed and fabricated a pulley-type heat-engine using tape-shaped SMA element for the purpose of improving of the life span of pulley-type SMA heat-engine. However, shape memory and mechanical characteristics of SMA deteriorate with increasing number of thermal cycles. Therefore, effects of thermal cycling on the shape memory and mechanical characteristics of the tape-shaped SMA element are investigated in this study. The chemical composition of the specimen is Ti-45.0Ni-5.0Cu (at%), heat treatment condition is 673K for 3.6ks and the specimen is memorized horizontal shape. The number of thermal cycling (N) is varied from 0 to 105. Transformation temperatures are almost constant as the N increases to 1×103. However, each difference of transformation temperature (Ms-Mf and AsAf) decrease when the N is within a range of 5×103 to 1×104, above which it increases. Mechanical properties improve with increase of N when the N is up to 1×104, above which it deteriorates. Furthermore, 2-stage martensitic transformation appears when N is above 5×104. These tendencies are caused by the variation of dislocation density and residual martensitic phase with the increasing of N.
{"title":"Effects of Heating and Cooling Cycle on the Shape Memory and Mechanical Characteristics of Tape-shaped Shape Memory Alloy Element","authors":"Chikara Nakagawa, Hiroki Cho","doi":"10.14723/TMRSJ.43.19","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.19","url":null,"abstract":"A pulley-type SMA heat-engine using Ti-Ni shape memory alloy (SMA) driven by lowtemperature waste heat energy was investigated. We have proposed and fabricated a pulley-type heat-engine using tape-shaped SMA element for the purpose of improving of the life span of pulley-type SMA heat-engine. However, shape memory and mechanical characteristics of SMA deteriorate with increasing number of thermal cycles. Therefore, effects of thermal cycling on the shape memory and mechanical characteristics of the tape-shaped SMA element are investigated in this study. The chemical composition of the specimen is Ti-45.0Ni-5.0Cu (at%), heat treatment condition is 673K for 3.6ks and the specimen is memorized horizontal shape. The number of thermal cycling (N) is varied from 0 to 105. Transformation temperatures are almost constant as the N increases to 1×103. However, each difference of transformation temperature (Ms-Mf and AsAf) decrease when the N is within a range of 5×103 to 1×104, above which it increases. Mechanical properties improve with increase of N when the N is up to 1×104, above which it deteriorates. Furthermore, 2-stage martensitic transformation appears when N is above 5×104. These tendencies are caused by the variation of dislocation density and residual martensitic phase with the increasing of N.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"50 12 1","pages":"19-22"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80221434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Ochi, H. Kojima, K. Fukuda, Y. Kaneno, S. Semboshi, F. Hori, Y. Saitoh, A. Iwase
To investigate the thermal stability of the ion-irradiation induced metastable lattice structures in bulk samples of NiTi intermetallic compound, they were irradiated with 16MeV Au ions at room temperature, and were subsequently annealed up to 823K. The lattice structures of the irradiated samples and the annealed samples were examined by using the x-ray diffraction. The measurements have also been performed for NiTi irradiated at 523K. The amorphous state induced by 16MeV Au ion irradiation at room temperature recovers to the intrinsic B19 ’ structure by the thermal annealing above 673K. The lattice structure, however, hardly changed even after the irradiation at 523K. The experimental result implies that the thermal motion of atoms in NiTi during the irradiation is much more effective for the recovery of the irradiation effect. The effect of thermal annealing on the surface hardness is also discussed.
{"title":"Thermal stability of irradiation-induced metastable lattice structures in NiTi intermetallic compound","authors":"M. Ochi, H. Kojima, K. Fukuda, Y. Kaneno, S. Semboshi, F. Hori, Y. Saitoh, A. Iwase","doi":"10.14723/TMRSJ.43.53","DOIUrl":"https://doi.org/10.14723/TMRSJ.43.53","url":null,"abstract":"To investigate the thermal stability of the ion-irradiation induced metastable lattice structures in bulk samples of NiTi intermetallic compound, they were irradiated with 16MeV Au ions at room temperature, and were subsequently annealed up to 823K. The lattice structures of the irradiated samples and the annealed samples were examined by using the x-ray diffraction. The measurements have also been performed for NiTi irradiated at 523K. The amorphous state induced by 16MeV Au ion irradiation at room temperature recovers to the intrinsic B19 ’ structure by the thermal annealing above 673K. The lattice structure, however, hardly changed even after the irradiation at 523K. The experimental result implies that the thermal motion of atoms in NiTi during the irradiation is much more effective for the recovery of the irradiation effect. The effect of thermal annealing on the surface hardness is also discussed.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"10 1","pages":"53-56"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88773841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Narumi Yoshijima, Ken Tamazawa, Ayu Kodaira, T. Nonami
Narumi Yoshijima1, Kengo Tamazawa2, Ayu Kodaira3, and Toru Nonami1* 1 Mechanical and Systems Engineering School of Technology, Chukyo University, 101-2 Yagotohonmachi, Showa-ku, Nagoya, Aichi Prefecture, Japan 466-8666 2 Graduate School of Information Science, Chukyo University Graduate School, 101-2 Yagotohonmachi, Showa-ku, Nagoya, Aichi Prefecture, Japan 466-8666 3 Institute for Advanced Studies in Artificial Intelligence, Chukyo University Institute for Advanced Studies in Artificial Intelligence, 101-2 Yagotohonmachi, Showa-ku, Nagoya, Aichi Prefecture, Japan 466-8666 * Corresponding author: Fax: +81-52-835-7956, e-mail: tnonami@sist.chukyo-u.ac.jp
{"title":"Synthesis of Titanium Oxide Photocatalyst Supported on Spherical Porous Hydroxyapatite","authors":"Narumi Yoshijima, Ken Tamazawa, Ayu Kodaira, T. Nonami","doi":"10.14723/TMRSJ.42.167","DOIUrl":"https://doi.org/10.14723/TMRSJ.42.167","url":null,"abstract":"Narumi Yoshijima1, Kengo Tamazawa2, Ayu Kodaira3, and Toru Nonami1* 1 Mechanical and Systems Engineering School of Technology, Chukyo University, 101-2 Yagotohonmachi, Showa-ku, Nagoya, Aichi Prefecture, Japan 466-8666 2 Graduate School of Information Science, Chukyo University Graduate School, 101-2 Yagotohonmachi, Showa-ku, Nagoya, Aichi Prefecture, Japan 466-8666 3 Institute for Advanced Studies in Artificial Intelligence, Chukyo University Institute for Advanced Studies in Artificial Intelligence, 101-2 Yagotohonmachi, Showa-ku, Nagoya, Aichi Prefecture, Japan 466-8666 * Corresponding author: Fax: +81-52-835-7956, e-mail: tnonami@sist.chukyo-u.ac.jp","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"90 1","pages":"167-171"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80309056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We report on the fabrication and characterization of AlGaN-based PiN type UV photodiodes with and without the surface recessed electrode structures. It was confirmed that the device with the surface recessed structure showed a much higher responsivity of 202 mA/W at a wavelength of 272 nm under a reverse bias voltage of -5 V than that of the device without the surface structure. This responsivity corresponds to external quantum efficiency as high as 92%.
{"title":"A comparative study of AlGaN-based PiN type UV photodiodes with and without surface recessed structures","authors":"M. Okada, Yuta Miyachi, M. Miyoshi, T. Egawa","doi":"10.14723/TMRSJ.42.151","DOIUrl":"https://doi.org/10.14723/TMRSJ.42.151","url":null,"abstract":"We report on the fabrication and characterization of AlGaN-based PiN type UV photodiodes with and without the surface recessed electrode structures. It was confirmed that the device with the surface recessed structure showed a much higher responsivity of 202 mA/W at a wavelength of 272 nm under a reverse bias voltage of -5 V than that of the device without the surface structure. This responsivity corresponds to external quantum efficiency as high as 92%.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"11 1","pages":"151-153"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78792292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shouichi Inaba, Takaaki Machida, Harutoshi Asakawa, R. Komatsu
SrB 4 O 7 (SBO) shows superior transparency in the vacuum ultraviolet (UV) region, a high radiation damage threshold, and high nonlinearity, and SBO crystals have therefore attracted great interest as materials for low-cost, high-power UV light sources. To use SBO crystals as laser sources, it is essential to grow transparent SBO crystals. Here we show the effects of temperature gradient G on the growth of SBO crystals by the micro-pulling-down method. At low G , SBO crystal fibers were obtained. The density of striations and the size of voids also decreased with decreasing G . These results demonstrate that a low G is essential for growing completely transparent SBO crystal fibers. In addition, we considered the effects of G on the oscillatory growth of SBO crystals in relation to latent heat removal.
{"title":"Effects of temperature gradient on growth of SrB4O7 crystals by the micro-pulling-down method","authors":"Shouichi Inaba, Takaaki Machida, Harutoshi Asakawa, R. Komatsu","doi":"10.14723/TMRSJ.42.123","DOIUrl":"https://doi.org/10.14723/TMRSJ.42.123","url":null,"abstract":"SrB 4 O 7 (SBO) shows superior transparency in the vacuum ultraviolet (UV) region, a high radiation damage threshold, and high nonlinearity, and SBO crystals have therefore attracted great interest as materials for low-cost, high-power UV light sources. To use SBO crystals as laser sources, it is essential to grow transparent SBO crystals. Here we show the effects of temperature gradient G on the growth of SBO crystals by the micro-pulling-down method. At low G , SBO crystal fibers were obtained. The density of striations and the size of voids also decreased with decreasing G . These results demonstrate that a low G is essential for growing completely transparent SBO crystal fibers. In addition, we considered the effects of G on the oscillatory growth of SBO crystals in relation to latent heat removal.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"9 1","pages":"123-126"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87843655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The metal organic decomposition (MOD) method enables the coating of any oxide material via atmospheric baking of a solution applied to a substrate and enables the fabrication of thin films via simple processes such as using spin coaters. We used titanium oxide, zinc oxide (ZnO), ytterbium oxide, and erbium oxide as MOD solutions. We mixed Ti, Zn, Yb, and Er at arbitrary mixing ratios, applied them on substrates, and then heated them at 1000°C for 4 h under atmosphere. We found that the maximum value for luminance of the upconversion (UC) scintillator can be obtained with mixture ratios of the base material Ti : Zn = 1 : 1 and Yb : Er additives = 0.06 : 0.02. When Yb : Er ratios were from 1:3 to 3:1, a 550 nm green light and 650 nm red light were observed. Moreover, by varying the mixture ratio of RE elements, the UC emission intensity can be controlled. As a result, the UC scintillators produced via the MOD method show the potential for use as multi-functional materials in displays and solid-state illumination.
{"title":"Emission characteristics of ZnO-TiO2 upconversion scintillator containing Er3+ and Yb3+ using MOD method","authors":"T. Nonaka, T. Ban, Shin-ichi Yamamoto","doi":"10.14723/TMRSJ.42.139","DOIUrl":"https://doi.org/10.14723/TMRSJ.42.139","url":null,"abstract":"The metal organic decomposition (MOD) method enables the coating of any oxide material via atmospheric baking of a solution applied to a substrate and enables the fabrication of thin films via simple processes such as using spin coaters. We used titanium oxide, zinc oxide (ZnO), ytterbium oxide, and erbium oxide as MOD solutions. We mixed Ti, Zn, Yb, and Er at arbitrary mixing ratios, applied them on substrates, and then heated them at 1000°C for 4 h under atmosphere. We found that the maximum value for luminance of the upconversion (UC) scintillator can be obtained with mixture ratios of the base material Ti : Zn = 1 : 1 and Yb : Er additives = 0.06 : 0.02. When Yb : Er ratios were from 1:3 to 3:1, a 550 nm green light and 650 nm red light were observed. Moreover, by varying the mixture ratio of RE elements, the UC emission intensity can be controlled. As a result, the UC scintillators produced via the MOD method show the potential for use as multi-functional materials in displays and solid-state illumination.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"1 1","pages":"139-143"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88907884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Yamaura, Shinya Makino, Natsuko Kimura, M. Yokoyama, T. Kubota, Y. Furuya
We studied the effects of alloy composition and heat-treatment conditions of the Fe-Co magnetostrictive alloys on the output voltage of a cantilever-type vibration energy harvester with the alloys. Fe-Co binary alloys that were annealed and subsequently water-quenched produced higher output voltages than those produced by alloys that were cold-rolled or annealed but not quenched. Annealed and quenched Fe-Co alloys possessed higher saturation magnetization, permeability, and magnetostriction susceptibility but lower residual magnetization, coercive force, and magnetostriction. Thus, we found that it was necessary to control not only the alloy composition and magnetostriction but also other magnetic parameters in order to increase the output voltage of power generator using magnetostrictive materials.
{"title":"Magnetic properties of heat-treated Fe-Co alloys and their potential for vibration energy harvesting","authors":"S. Yamaura, Shinya Makino, Natsuko Kimura, M. Yokoyama, T. Kubota, Y. Furuya","doi":"10.14723/TMRSJ.42.127","DOIUrl":"https://doi.org/10.14723/TMRSJ.42.127","url":null,"abstract":"We studied the effects of alloy composition and heat-treatment conditions of the Fe-Co magnetostrictive alloys on the output voltage of a cantilever-type vibration energy harvester with the alloys. Fe-Co binary alloys that were annealed and subsequently water-quenched produced higher output voltages than those produced by alloys that were cold-rolled or annealed but not quenched. Annealed and quenched Fe-Co alloys possessed higher saturation magnetization, permeability, and magnetostriction susceptibility but lower residual magnetization, coercive force, and magnetostriction. Thus, we found that it was necessary to control not only the alloy composition and magnetostriction but also other magnetic parameters in order to increase the output voltage of power generator using magnetostrictive materials.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"38 1","pages":"127-133"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87216128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Boron nitride nanosheets (BNNSs) are attractive 2-dimensional nanomaterials with excellent thermal conductivity, mechanical properties, and thermal stability. It is therefore significant to develop new simple methods to produce BNNSs. In this study, BNNSs with nanometer thicknesses and diameters of several hundreds of nanometers were produced by alcoholysis-assisted exfoliation from hexagonal boron nitride (h-BN) through sonication of h-BN in primary alcohols such as butanol and hexanol. Atomic force microscopy images of the BNNSs revealed that the morphologies were dependent on alcohol species and preparation methods. Infrared absorption spectra of the BNNSs suggested that alcoholysis of B–N bonds in primary alcohols during sonication processes was essential for BNNS production.
{"title":"Alcoholysis-Assisted Exfoliation of Boron Nitride Nanosheets from Hexagonal Boron Nitride","authors":"Witita Laosamathikul, Toshiki Sawada, T. Serizawa","doi":"10.14723/TMRSJ.42.135","DOIUrl":"https://doi.org/10.14723/TMRSJ.42.135","url":null,"abstract":"Boron nitride nanosheets (BNNSs) are attractive 2-dimensional nanomaterials with excellent thermal conductivity, mechanical properties, and thermal stability. It is therefore significant to develop new simple methods to produce BNNSs. In this study, BNNSs with nanometer thicknesses and diameters of several hundreds of nanometers were produced by alcoholysis-assisted exfoliation from hexagonal boron nitride (h-BN) through sonication of h-BN in primary alcohols such as butanol and hexanol. Atomic force microscopy images of the BNNSs revealed that the morphologies were dependent on alcohol species and preparation methods. Infrared absorption spectra of the BNNSs suggested that alcoholysis of B–N bonds in primary alcohols during sonication processes was essential for BNNS production.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"20 1","pages":"135-138"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90366864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Glycopolymers with various pendant oligosaccharides were synthesized from free saccharides without protection of the saccharide hydroxy and carboxy groups. The strategy involved direct anomeric azidation of the free saccharides, copper-catalyzed azide-alkyne cycloaddition, and reversible addition-fragmentation chain transfer polymerization using the glycomonomers and trithiocarbonate derivative as a chain transfer agent. After reducing the trithiocarbonate terminal group on the polymer backbone, the resulting thiol-terminated glycopolymers were immobilized on gold nanoparticles via Au-S bound formation. The glycopolymer-decorated gold nanoparticles in aqueous suspension were specifically recognized by the corresponding lectin, with no measurable nonspecific binding.
{"title":"Synthesis of Glycopolymer Gold Nanoparticles Decorated with Oligosaccharides via a Protecting-group-free Process and Their Specific Recognition by Lectins","authors":"Tomonari Tanaka, Hiroyuki Fukumoto, H. Ishitani","doi":"10.14723/TMRSJ.42.113","DOIUrl":"https://doi.org/10.14723/TMRSJ.42.113","url":null,"abstract":"Glycopolymers with various pendant oligosaccharides were synthesized from free saccharides without protection of the saccharide hydroxy and carboxy groups. The strategy involved direct anomeric azidation of the free saccharides, copper-catalyzed azide-alkyne cycloaddition, and reversible addition-fragmentation chain transfer polymerization using the glycomonomers and trithiocarbonate derivative as a chain transfer agent. After reducing the trithiocarbonate terminal group on the polymer backbone, the resulting thiol-terminated glycopolymers were immobilized on gold nanoparticles via Au-S bound formation. The glycopolymer-decorated gold nanoparticles in aqueous suspension were specifically recognized by the corresponding lectin, with no measurable nonspecific binding.","PeriodicalId":23220,"journal":{"name":"Transactions-Materials Research Society of Japan","volume":"58 1","pages":"113-118"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78857925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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