Development of a High Field Superconducting Magnet Cooled by a 2 K Cryocooler (2) — Characteristics of 2 K Cryocooler

Satô, Akio; Nimori, Shigeki; Maeda, Masafumi; Nagai, Hideo; Matsumoto, F.; Takahashi, M.; Kuriyama, T.; Fujioka, Takehiko; Ito, Takuji; Okamura, Takahiro

doi:10.1063/1.1774750

Cited by 6 publications

(6 citation statements)

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“…Figure 1a shows the films were prepared by (i) electrodepositing the chitosan through a cathodic neutralization mechanism, 24,42 (ii) contacting the chitosan-coated electrode with a buffered solution (pH 8.0) containing ConA (pI 4.5−5.5) to allow this protein to bind through nonspecific (presumably electrostatic) interactions, 22,43,44 and (iii) sequentially contacting the film with glycogen and ConA solutions to enable biospecific layer-by-layer (LbL) self-assembly. [45][46][47][48] This assembled film is denoted as Chit-(ConA/Gly) n ConA, where n represents the number of ConA and glycogen bilayers. In initial studies, we biofunctionalized the films using the glycoprotein glucose oxidase (GOx) which assembles through the same biospecific ConA−sugar interactions, [49][50][51][52][53][54] and this film is denoted as Chit-(ConA/Gly) n ConA/GOx.…”

Section: Electrochemical Detection Of Gox and Monitoring Of Disassembly-mentioning

confidence: 99%

Coupling Self-Assembly Mechanisms to Fabricate Molecularly and Electrically Responsive Films

Maniar

et al. 2019

Biomacromolecules

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Biomacromolecules often possess information to self-assemble through low energy competing interactions which can make self-assembly responsive to environmental cues and can also confer dynamic properties. Here, we coupled self-assembling systems to create biofunctional multilayer films that can be cued to disassemble through either molecular or electrical signals. To create functional multilayers, we: (i) electrodeposited the pH-responsive self-assembling aminopolysaccharide chitosan, (ii) allowed the lectin Concanavalin A (ConA) to bind to the chitosan-coated electrode (presumably through electrostatic interactions), (iii) performed layer-bylayer self-assembly by sequential contacting with glycogen and ConA, and (iv) conferred biological (i.e., enzymatic) function by assembling glycoprotein (i.e., enzymes) to the ConAterminated multilayer. Because the ConA tetramer dissociates at low pH, this multilayer can be triggered to disassemble by acidification. We demonstrate two approaches to induce acidification: (i) glucose oxidase can induce multilayer disassembly in response to molecular cues, and (ii) anodic reactions can induce multilayer disassembly in response to electrical cues.

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Section: Electrochemical Detection Of Gox and Monitoring Of Disassembly-mentioning

confidence: 99%

Coupling Self-Assembly Mechanisms to Fabricate Molecularly and Electrically Responsive Films

Maniar

et al. 2019

Biomacromolecules

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“…Further, the reactions are often conducted in environmentally undesirable solvents, like chlorinated hydrocarbons. In a constant search greener technology, there is a definite need for catalytic oxidants where hydrogen peroxide can be used as one of the stoichiometric oxidant, 12 which is atom efficient 13 and produce water as only by-product. Most reports involve the oxidation of activated benzylic and allylic alcohols 14 or the use of Mukaiyama co-oxidation method.…”

Section: Introductionmentioning

confidence: 99%

Microwave Synthesis of SnWO₄ Nanoassemblies on DNA Scaffold: A Novel Material for High Performance Supercapacitor and as Catalyst for Butanol Oxidation

Ede

Kundu

2015

ACS Sustainable Chem. Eng.

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Self-assembled, aggregated SnWO 4 nano-assemblies are formed by the reaction ofSn(II) salt and Na 2 WO 4 .2H 2 O in the presence of DNA under microwave heating within six minutes. We have emphasized the natural properties of DNA with its ability to scaffold SnWO 4 nano-assemblies and examined the role of starting reagents on the particles morphology. The diameter of the individual particles is ultra-small and varies from ~ 1-2.5 nm. The potentiality of the SnWO 4 nano-assemblies has been tested for the first time in two different applications, such as an anode material in electrochemical supercapacitor studies and as a catalyst for the oxidation of butanol to butanoic acid. From supercapacitor study, it was observed that SnWO 4 nano-assemblies with different sizes showed different specific capacitance (C s ) values and the highest C s value was observed for SnWO 4 nano-assemblies having small size of the individual particles. The highest C s value of 242 F g -1 was observed at a scan rate of 5 mV s -1 for small size SnWO 4 nano-assemblies. The capacitor shows an excellent long cycle life along with 85% retention of C s value even after 4000 consecutive times of cycling at a current density of 10 mAcm -2 . From the catalysis studies, it was observed that SnWO 4 nano-assemblies acted as a potential catalyst for the oxidation of butanol to butanoic acid using eco-friendly hydrogen peroxide as an oxidant with 100 % product selectivity. Other than catalysis and supercapacitor, in futuristic, the material can further be used in sensor, visible light photo-catalysis and energy related applications.Research on nanomaterials, mainly nanoparticles (NPs) has been focused on the assembly strategies to control the specific arrangement of NPs. The morphology controlled synthesis of zero and 1-dimensional (1-D) inorganic nanomaterials have attracted significant interest due to the importance of the geometrical forms of materials in determining their widely varying properties at nanoscale. 1-3 During last few years, a bunch of techniques had been developed for the successful generation of self-assembled NPs into ordered nanostructures. However, there are very few techniques available to organize nanomaterials in a precise 1-D pattern. The 'bottom up' approach and the wet-chemical synthesis have been found to be the most easy and facile way to synthesize self-assemble nanomaterials in 1-D patterns in a short time scale. While considering metal oxide nanomaterials in general, they have been extensively studied owing to their unique magnetic, catalytic and Energy storage properties across a broad range of fundamental and technological potential. In particular, the fields like Energy storage and in catalysis. Electrochemical Supercapacitors show the desirable characteristics of high power density, fast charging, excellent cyclic stability, small size and low mass, when compared with batteries and fuel cells, make them one of the most promising candidates for next generation power devices. 4-7 In general, most commercially available ...

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“…It was found that the rate of formation of metallic iron is increased with increasing partial pressure of the reducing gas. A highly porous structure with extensive surface cracking could be observed under strongly reducing gas composition 23- 27 .…”

Section: Introductionmentioning

confidence: 99%

Characteristics and applications of iron oxide reduction processes

Abdel Halim,

El-Geassy,

Nasr

et al. 2023

Polish Journal of Chemical Technology

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The present review handles the main characteristics of iron oxide reduction and its industrial applications. The reduction of iron oxide is the basis of all ironmaking processes, whether in a blast furnace or by direct reduction and/or direct smelting processes. The reduction characteristics of iron ores control the efficiency of any ironmaking process and the quality of the produced iron as well. Many controlling parameters should be considered when discussing the reducibility of iron ores such as equilibrium phase diagrams, reduction temperature, pressure, gas composition, and the nature of both iron ores and reducing agent. The different factors affecting the main routes of ironmaking will be highlighted in the present review to give a clear picture of each technology. Moreover, further innovations regarding the reduction of iron oxides such as the reduction by green hydrogen will be discussed.

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Development of a High Field Superconducting Magnet Cooled by a 2 K Cryocooler (2) — Characteristics of 2 K Cryocooler

Cited by 6 publications

References 0 publications

Coupling Self-Assembly Mechanisms to Fabricate Molecularly and Electrically Responsive Films

Coupling Self-Assembly Mechanisms to Fabricate Molecularly and Electrically Responsive Films

Microwave Synthesis of SnWO₄ Nanoassemblies on DNA Scaffold: A Novel Material for High Performance Supercapacitor and as Catalyst for Butanol Oxidation

Characteristics and applications of iron oxide reduction processes

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Development of a High Field Superconducting Magnet Cooled by a 2 K Cryocooler (2) — Characteristics of 2 K Cryocooler

Cited by 6 publications

References 0 publications

Coupling Self-Assembly Mechanisms to Fabricate Molecularly and Electrically Responsive Films

Coupling Self-Assembly Mechanisms to Fabricate Molecularly and Electrically Responsive Films

Microwave Synthesis of SnWO4 Nanoassemblies on DNA Scaffold: A Novel Material for High Performance Supercapacitor and as Catalyst for Butanol Oxidation

Characteristics and applications of iron oxide reduction processes

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Product

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Microwave Synthesis of SnWO₄ Nanoassemblies on DNA Scaffold: A Novel Material for High Performance Supercapacitor and as Catalyst for Butanol Oxidation