Institute for Clean Energy and Advanced Materials (ICEAM), Southwest University, Chongqing 400715, People's Republic of China.
Nanotechnology. 2017 Oct 20;28(42):425202. doi: 10.1088/1361-6528/aa8397. Epub 2017 Aug 2.
Egg albumen is modified by hydrogen peroxide with concentrations of 5%, 10%, 15% and 30% at room temperature. Compared with devices without modification, a memory cell of Ag/10% HO-egg albumen/indium tin oxide exhibits obviously enhanced resistive switching memory behavior with a resistance ratio of 10, self-healing switching endurance for 900 cycles and a prolonged retention time for a 10 s @ 200 mV reading voltage after being bent 10 times. The breakage of massive protein chains occurs followed by the recombination of new protein chain networks due to the oxidation of amidogen and the synthesis of disulfide during the hydrogen peroxide modifying egg albumen. Ions such as Fe, Na, K, which are surrounded by protein chains, are exposed to the outside of protein chains to generate a series of traps during the egg albumen degeneration process. According to the fitting results of the double logarithm I-V curves and the current-sensing atomic force microscopy (CS-AFM) images of the ON and OFF states, the charge transfer from one trap center to its neighboring trap center is responsible for the resistive switching memory phenomena. The results of our work indicate that hydrogen- peroxide-modified egg albumen could open up a new avenue of biomaterial application in nanoelectronic systems.
卵清蛋白在室温下用浓度为 5%、10%、15%和 30%的过氧化氢进行修饰。与未经修饰的器件相比，Ag/10%HO-卵清蛋白/氧化铟锡的忆阻单元表现出明显增强的电阻开关记忆行为，具有 10 的电阻比、900 次自修复开关耐久性和在 200 mV 读取电压下 10 s 的延长保持时间，在弯曲 10 次后。由于氨基的氧化和二硫键的合成，大量蛋白质链断裂，随后由于新的蛋白质链网络的重组，导致鸡蛋白蛋白在过氧化氢修饰后发生变性。Fe、Na、K 等被蛋白质链包围的离子在蛋白质链外暴露出来，在卵清蛋白退化过程中产生一系列陷阱。根据双对数 I-V 曲线的拟合结果和 ON 和 OFF 状态的电流感应原子力显微镜（CS-AFM）图像，从一个陷阱中心到其相邻陷阱中心的电荷转移负责电阻开关记忆现象。我们工作的结果表明，过氧化氢修饰的卵清蛋白可以为纳米电子系统中的生物材料应用开辟新途径。
