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- W3000549893 abstract "Chitosan is a weak cationic polyelectrolyte that can be cued to undergo reversible pH-dependent self-assembly in which individual chains associate to form macroscopic hydrogels. Nearly 20 years ago it was observed that the high pH cues that induce chitosan's self-assembly can be imposed electrically to induce chitosan hydrogels to electrodeposit on cathode surfaces. These imposed electrical signals (< 5 V) have two components: the current (or rate of electron-transfer from the electrode) that quantifies the localized generation of OH– that is responsible for neutralizing chitosan chains and inducing their self-assembly; and the voltage (or field) that can provide a force on the charged chitosan chains to drive their migration toward the cathode and their alignment during electrodeposition. Five years ago, it was reported that an oscillatory ON-OFF electrical input cued the emergence of a segmented hydrogel structure: segments are formed during the ON-step while denser boundary regions are formed during the OFF-step. Later work extended the use of electrical signals to guide the emergence of structure from a dual-responsive chitosan-agarose interpenetrating network. In this short review, we summarize our understanding of the underlying phenomena, and the relevance to the transduction of electrical to structural information and the controllable introduction of hydrogel properties." @default.
- W3000549893 created "2020-01-23" @default.
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- W3000549893 date "2020-03-01" @default.
- W3000549893 modified "2023-10-17" @default.
- W3000549893 title "Electrical cuing of chitosan's mesoscale organization" @default.
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- W3000549893 doi "https://doi.org/10.1016/j.reactfunctpolym.2020.104492" @default.
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