Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721302, India.
Nanotechnology. 2013 Aug 30;24(34):345202. doi: 10.1088/0957-4484/24/34/345202.
The growing demand for biomaterials for electrical and optical devices is motivated by the need to make building blocks for the next generation of printable bio-electronic devices. In this study, transparent and flexible resistive memory devices with a very high ON/OFF ratio incorporating gold nanoparticles into the Bombyx mori silk protein fibroin biopolymer are demonstrated. The novel electronic memory effect is based on filamentary switching, which leads to the occurrence of bistable states with an ON=OFF ratio larger than six orders of magnitude. The mechanism of this process is attributed to the formation of conductive filaments through silk fibroin and gold nanoparticles in the nanocomposite. The proposed hybrid bio-inorganic devices show promise for use in future flexible and transparent nanoelectronic systems.
对用于电子和光学器件的生物材料不断增长的需求，是由制造下一代可打印生物电子器件的基本构建块所推动的。在这项研究中，将金纳米粒子纳入到桑蚕丝蛋白生物聚合物中，展示了具有非常高的导通/截止比的透明且灵活的电阻式存储器件。这种新颖的电子存储效应基于丝状开关，其导致具有大于六个数量级的导通/截止比的双稳状态的发生。这个过程的机制归因于在纳米复合材料中通过丝素蛋白和金纳米粒子形成的导电丝。所提出的混合生物-无机器件有望用于未来的柔性透明纳米电子系统。
