Accès ouvert
2024
article
OpenAlex
K. Kurosawa, Wakana Kanomata, Suzune Konno, Gimyeong Seong et autres
Copper-based conductive ink has received attention to fabricate thin, flexible, and lightweight devices through printing techniques. In particular, the copper formate based conductive inks, called metal organic decomposition (MOD) inks, which are fabricated by using amine ligand coordinated copper formate have been …
jp, kr
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Accès ouvert
2024
article
OpenAlex
Takanari Togashi
有機分子により被覆された無機ナノ粒子はサイズ・形状に依存したユニークな物性を発現する．さらに，溶媒に分散可能であり，医療・工学的用途が多数報告されている．これまで，サイズ制御は金属イオン濃度が希薄な液相法で行われている．結果，ナノ粒子合成量の増加に伴い廃液量が増加し，環境面の課題が残る．現在，我々はアルキルアミン融合シュウ酸錯体を原料として用いたナノ粒子合成法を研究している．この手法では，溶媒を用いることなく，少量の配位子中でサイズが均一な単分散ナノ粒子の合成・予測可能なサイズ制御までも可能としている．その一方で，合成実績は少なく，汎用性の向上には新たな金属種での錯体の合成が必須である．本研究では，新たにニッケル，コバルト，スズ，バナジウムを金属イオンにもつアルキルアミン融合シュウ酸錯体の合成を試みた．得られた金属錯体の構造・物性はX線回折，赤外分光法，熱重量測定装置により評価した．
jp
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2023
article
OpenAlex
Debraj Chandra, Tomohiro Katsuki, Yuki Tanahashi, Takanari Togashi et autres
A unique transformation of WO 3 nanowires (NW-WO 3 ) into hexagonal prisms (HP-WO 3 ) was demonstrated by tuning the temperature of the (N 2 H 4 )WO 3 precursor suspension prepared from tungstic acid and hydrazine as a structure-directing agent. …
jp
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2023
article
OpenAlex
Tadafumi Adschiri, Seiichi Takami, Mitsuo Umetsu, Satoshi Ohara et autres
Abstract Since the early 1990s, Adschiri and his colleagues have performed research on the use of supercritical water in diverse applications, including heavy oil reforming, waste polymer decomposition and chemical raw materials recovery, cellulose hydrolysis and sugar recovery, lignin decomposition and chemical …
jp
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2022
article
OpenAlex
Kyosuke Amemiya, Takanari Togashi, Jun Matsui, Katsuhiko Kanaizuka
Silver nanoparticles (NPs) including spherical and triangular plates were prepared. These NP films were constructed on the self-assembled monolayer of 3-aminopropyltrimethoxysilane using a simple dipping method. The tape-peeling method was applied to the films, and only the spherical nanoparticles were removed from …
jp
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2021
article
OpenAlex
Zaki N. Zahran, Eman A. Mohamed, Yuta Tsubonouchi, Manabu Ishizaki et autres
The critical bottleneck for water splitting, which is important for sustainable production of hydrogen, has remained in sluggish oxygen evolving reaction (OER) requiring insufficiently low overpotentials, η. We report a facile and versatile method for the preparation of loading-controllable metal oxide films …
Égypte, jp
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2021
article
OpenAlex
Zaki N. Zahran, Eman A. Mohamed, Yuta Tsubonouchi, Manabu Ishizaki et autres
The unprecedentedly low overpotential of 32 mV for oxygen evolution was attained by forming a unique motif of NiS x nanowires stuffed into C 3 N 4 scabbards. With this system, electrocatalytic water splitting was demonstrated at the lowest overall overpotential of …
jp
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2021
article
OpenAlex
Ryosuke Nozawa, Takashi Naka, Masato Kurihara, Takanari Togashi
NPs was studied. This continuous seed-mediated growth method based on the stepwise thermal decomposition of metal oxalate can be applied to control the size of a variety of metal and metal oxide NPs.
jp
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2020
article
OpenAlex
Takanari Togashi, Koki Tsuchida, Shiori Soma, Ryosuke Nozawa et autres
The size-tunable synthesis of metal nanoparticles (MNPs) is important for revealing their size-dependent unique properties and practical applications. Here, we developed a size-tunable synthesis method based on the LaMer model for the synthesis of a silver nanoparticle (Ag NP) in an alkylamine …
jp
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Accès ouvert
2020
article
OpenAlex
Tomohiro Yahagi, Takanari Togashi, Masato Kurihara
samples show one of the highest catalytic abilities for the hydrogenation reduction of 4-nitrophenol into 4-aminophenol as a model reaction catalysed by Ag NPs.
jp
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2019
article
OpenAlex
Yusuke Sakuda, Shunsuke Asahina, Takanari Togashi, Osamu Terasaki et autres
Surface-sensitive information on a bulk sample can be obtained by using a low incident electron energy (low accelerating voltage/landing voltage) in a scanning electron microscope (SEM). However, topography and composition contrast obtained at low incident electron energies may not be intuitive and …
jp, cn
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2019
article
OpenAlex
Debraj Chandra, Dong Li, Tetsuya Sato, Yuki Tanahashi et autres
Nanorod architecture of a N 2 -intercalated WO 3 photoanode has been developed by emphasizing the dual role of N 2 H 4, which functioned simultaneously as a structure-directing agent and as a nitrogen source for in situ N 2 intercalation. The …
jp
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