ACS Appl Mater Interfaces. 2020 Nov 18;12(46):52182-52191. doi: 10.1021/acsami.0c15601. Epub 2020 Nov 9.
Bioderived cellulose nanocrystals (CNCs) are used to create light, flexible, biocompatible, and biodegradable electronic devices. Herein, surface modification of cellulose nanocrystals was employed to fabricate cationic and anionic CNCs. Subsequently, we demonstrated rectification behavior from a fixed junction between two agarose hydrogels doped with cationic and anionic cellulose nanocrystals. The current rectification ratio reaches 70 reproducibly, which is significantly higher than that for analogous diodes generated with microfibrillated cellulose (∼15) and the first polyelectrolyte gel diode (∼40). The current-voltage characteristics of the CNC-hydrogel diode are influenced by concentration, gel thickness, scanning frequency, and applied voltage. The high surface area of CNC resulted in high charge density after surface modification, which in turn resulted in good rectification behavior from only small amounts of dopant material.
生物衍生纤维素纳米晶体（CNC）用于制造轻量、灵活、生物相容和可生物降解的电子设备。在此，通过对纤维素纳米晶体进行表面修饰来制备阳离子和阴离子 CNC。随后，我们展示了在掺杂有阳离子和阴离子纤维素纳米晶体的两个琼脂糖水凝胶之间的固定结处的整流行为。该整流比可重复达到 70，显著高于类似的用微原纤化纤维素（约 15）和第一个聚电解质凝胶二极管（约 40）产生的二极管。CNC-水凝胶二极管的电流-电压特性受浓度、凝胶厚度、扫描频率和外加电压的影响。经过表面修饰后，CNC 的高表面积导致高电荷密度，从而仅用少量掺杂材料即可实现良好的整流行为。
