Organic Memory Device Based on Carbazole‐Substituted Cellulose

Karakawa, Makoto; Chikamatsu, Masayuki; Yoshida, Yūji; Azumi, Reiko; Yase, Kiyoshi; Nakamoto, Chikanobu

doi:10.1002/marc.200700186

Cited by 43 publications

(32 citation statements)

References 31 publications

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“…Besides their traditional applications as additives in the food industry, in coatings, printing, cosmetic, textile, and in the pharmaceuticals industry, new cellulose derivatives have also been investigated for their applications, such as drug delivery systems [140], in chiral separation and recognition [141], as photoactive materials [142], as antioxidant agents [143], in memory of electronic devices [144], and graft copolymers [145].…”

Section: Industrial Cellulose Derivative Production Methodsmentioning

confidence: 99%

Ionic Liquid as Reaction Media for the Production of Cellulose-Derived Polymers from Cellulosic Biomass

et al. 2017

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Abstract:The most frequent polymer on nature is cellulose that is present together with lignin and hemicellulose in vegetal biomass. Cellulose can be, in the future, sustainable raw matter for chemicals, fuels, and materials. Nevertheless, only 0.3% of cellulose is processed nowadays due to the difficulty in dissolving it, and only a small proportion is used for the production of synthetic cellulosic fibers especially esters and other cellulose derivatives, normally in extremely polluting processes. The efficient and clean dissolution of cellulose is a major objective in cellulose research and development. Ionic liquids (ILs) are considered "green" solvents due to their low vapor pressure, that prevents them evaporating into the atmosphere. In addition, these molten salts present advantages in process intensification, leading to more than 70 patents in lignocellulosic biomass in ILs being published since 2005, most of them related to the production of cellulose derived polymers, e.g., acetates, benzoylates, sulfates, fuorates, phthalates, succinates, tritylates, or silylates. In this work, the use of ILs for production of cellulose derived polymers is thoroughly studied. To do so, in the first place, a brief summary of the state of the art in cellulose derivatives production is presented, as well as the main features of ILs in cellulose processing applications. Later, the main results in the production of cellulose derivatives using ILs are presented, followed by an analysis of the industrial viability of the process, considering aspects such as environmental concerns and ILs' recyclability.

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Section: Industrial Cellulose Derivative Production Methodsmentioning

confidence: 99%

Ionic Liquid as Reaction Media for the Production of Cellulose-Derived Polymers from Cellulosic Biomass

et al. 2017

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“…[25] Zhang et al have homogeneously synthesised carbazole-substituted hydroxyethyl cellulose (HEC) where, by increasing the cellulose degree of substitution with carbazole, the fluorescence lifetime was increased. [26] The…”

Section: Introductionmentioning

confidence: 99%

Coumarin and carbazole fluorescently modified cellulose nanocrystals using a one‐step esterification procedure

2016

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This article is protected by copyright. All rights reserved Fluorescent cellulose nanocrystals with carbazole and coumarin functionalities were synthesised in a one-step esterification reaction using carbazole-9-yl-acetic acid and coumarin-3-carboxylic acid respectively, using a p-toluenesulfonyl chloride/pyridine system. Characterization with elemental analysis, X-ray diffraction, X-ray photoelectron spectroscopy, infrared, absorption and emission spectroscopy, and AFM and TEM imaging confirmed that a high degree of modification could be achieved (up to DS surf = 1.33) while retaining the CNC core crystallinity and nanoparticle dimensions. The present grafting method gives a straightforward way when compared with previously reported fluorescent labelling methodologies and gives an extremely high grafting density while retaining the CNC crystallinity. UV spectroscopy also indicates fluorescence quenching at high grafting densities so that optimal fluorescence does not necessarily mean maximum grafting density. This

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“…[151][152][153] Natural biomaterials, especially proteins, open up new opportunities for resistive-switching memory devices by endowing them with outstanding properties, such as mechanical fl exibility, biocompatibility, and light-weight, which renders them suitable for applications in biocompatible data-storage devices and biointegrated electronics. [ 32,[159][160][161][162][163][164] Silk protein exhibits more appealing properties compared with other biocompatible materials, such as ferritin, [ 159 ] cellulose, [ 165 ] and DNA, [ 166,167 ] for resistive-switching memory applications duo to its advantageous properties, such as mechanical robustness, fl exibility in thin-fi lm form, optical transparency, and compatibility with aqueous processing. [ 32,168 ] Silk-fi broin fi lms exhibited bipolar memristive switching behavior in a device with an indium tin oxide (ITO)/ fi broin/Al sandwich structure, with an OFF/ON ratio of 10 and retention time of 10 3 s. [ 78 ] The resistive switching of the above memristor was further studied at the microscopic scale, [ 169 ] which revealed that the current conduction process is dominated by fi lamentary conduction during LRS, and trap-assisted current conduction when in the HRS.…”

Section: Resistive-switching Memory Devicesmentioning

confidence: 99%

Silk Fibroin for Flexible Electronic Devices

et al. 2015

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Flexible electronic devices are necessary for applications involving unconventional interfaces, such as soft and curved biological systems, in which traditional silicon-based electronics would confront a mechanical mismatch. Biological polymers offer new opportunities for flexible electronic devices by virtue of their biocompatibility, environmental benignity, and sustainability, as well as low cost. As an intriguing and abundant biomaterial, silk offers exquisite mechanical, optical, and electrical properties that are advantageous toward the development of next-generation biocompatible electronic devices. The utilization of silk fibroin is emphasized as both passive and active components in flexible electronic devices. The employment of biocompatible and biosustainable silk materials revolutionizes state-of-the-art electronic devices and systems that currently rely on conventional semiconductor technologies. Advances in silk-based electronic devices would open new avenues for employing biomaterials in the design and integration of high-performance biointegrated electronics for future applications in consumer electronics, computing technologies, and biomedical diagnosis, as well as human-machine interfaces.

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Organic Memory Device Based on Carbazole‐Substituted Cellulose

Cited by 43 publications

References 31 publications

Ionic Liquid as Reaction Media for the Production of Cellulose-Derived Polymers from Cellulosic Biomass

Ionic Liquid as Reaction Media for the Production of Cellulose-Derived Polymers from Cellulosic Biomass

Coumarin and carbazole fluorescently modified cellulose nanocrystals using a one‐step esterification procedure

Silk Fibroin for Flexible Electronic Devices

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