柔性光电纳米纸
Flexible Nanpaper for Electronics
我们报告了一种新的部分溶解策略,以从宏观上解放从宏观的纤维素纤维中释放出直径为5-10纳米的均匀的纤维素纳米纤维,并促进纳米纤维在水中的分离。并促进纳米纤维在水环境中的分离。形成水溶性的羧甲基纤维素钠(CMC)。通过纤维素的异质乙酰氧基化钠促进纳米纤维在水环境中的分离。
We report a novel partial dissolution strategy to liberate uniform cellulose nanofibers with diameter of 5−10 nm from macroscopic cellulose fibers and promote separation of nanofibers in an aqueous environment by forming water-soluble sodium carboxymethylcellulose (CMC) through heterogeneous sodium acetoxylation of cellulose.
图1 制备原理与工艺流程
图2 多尺度纤维结构特征与光学、热学性质
图3 纳米纸光学特征与表面性质、力学强度
图4 导电纳米加工与光电性能
我们报告了新颖的纤维素纳米纤维并制造了光学良好的纳米纸,表现出高的90.5%的光学透明度(@550 nm),且具有良好的机械性能和热稳定性。通过将银纳米线直接沉积在通过在湿的纳米纤维片上直接沉积银纳米线,我们制造了一个灵活柔软的透明电极,具有86.5%的(@550 nm)的透明度和26.2Ω/sq电阻(Rs)。
With the obtained cellulose nanofibers, we fabricated nanopapers which exhibit high optical transparency of 90.5% (@550 nm) with promising mechanical properties and high thermal stability. By directly depositing Ag nanowires on a wet nanofiber sheet, we fabricated a flexible transparent electrode with 86.5% (@550 nm) transparency and 26.2 Ω/sq sheet resistance (Rs).
同时,我们同时,我们研究了溅射沉积在纳米纸上的permalloy薄膜的磁特性。同时,我们研究了在纳米纸上溅射沉积的过热合金薄膜的磁特性,该薄膜表现出与传统的二氧化硅相似的磁矫顽力和接近的饱和磁化。磁化率与传统的二氧化硅基电气合金相似。
Meanwhile, we studied the magnetic properties of sputter deposited thin film of permalloy on nanopaper which exhibited a similar magnetic coercivity and a close saturation magnetization to conventional silicon dioxide-based permalloy.
图5 磁性纳米加工与permalloy薄膜的磁特性