Silver Nanowires Deposited on Cellulose Nanofibers/Graphene Oxide Hybrid Membranes as Sandwich-Structured Films for Optoelectronic and SERS Applications,ACS Applied Nano Materials

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Silver Nanowires Deposited on Cellulose Nanofibers/Graphene Oxide Hybrid Membranes as Sandwich-Structured Films for Optoelectronic and SERS Applications
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-10-28 , DOI: 10.1021/acsanm.0c02125
Changshun Wang ₁ , Juan Xu ₁ , Shanlin Ke ₁ , Yao Li ₂ , Xingzhong Zhu ₁ , Xiaorong Gu ₁ , Caixia Kan _{1,

3} , Daning Shi _{1,

3}

Affiliation

Flexible conductive films with high surface conductivity, broadband optical absorption, and excellent chemical and thermal stabilities are desired for optoelectronic applications. Herein, a facile layer-by-layer vacuum filtration method is presented to fabricate a sandwich-structured conductive film with silver nanowires (AgNWs) that adhere to the surface of cellulose nanofibers (CNF)/graphene oxide (GO) hybrid membranes. The middle CNF/GO layer offers a flexible and stable substrate for the AgNWs layer to form a condensed stratiform structure. The well-designed sandwich-structured film exhibited conductive anisotropy with improved conductivity along the in-plane direction and insulating properties along the cross-plane direction. The successful coating of monatomic GO sheets on AgNWs network resulted in a sheet resistance lower than 7 Ω sq^–1 due to the reduction of the contact resistance between the AgNWs junctions. Thanks to the synergistic effect between the CNF/GO substrate and the AgNWs layer which with excellent localized surface plasmonic property, the sandwich-structured film not only achieved efficient broadband optical absorption up to ∼80% at visible and near-infrared frequencies but also demonstrated prominent surface-enhanced Raman scattering (SERS) performance. Moreover, the film exhibited outstanding mechanical durability, including thermal and chemical stability, demonstrably resisting high temperature and solvent corrosion in harsh environments, making it suitable for promising applications in flexible optoelectronic devices.

中文翻译：

沉积在纤维素纳米纤维/氧化石墨烯杂化膜上的银纳米线作为夹层结构的薄膜，用于光电和SERS应用

具有高表面电导率，宽带光吸收以及优异的化学和热稳定性的柔性导电膜是光电应用所需要的。本文中，提出了一种容易的逐层真空过滤方法，以制造具有粘附到纤维素纳米纤维（CNF）/氧化石墨烯（GO）混合膜表面的银纳米线（AgNW）的夹心结构的导电膜。中间的CNF / GO层为AgNWs层提供了一个灵活而稳定的基底，以形成一个凝聚的层状结构。设计良好的夹心结构膜表现出导电各向异性，其沿面内方向具有改善的导电性，并且具有沿横面方向具有绝缘性。在AgNWs网络上成功涂覆单原子GO薄层导致薄层电阻低于7Ωsq^–1是由于减少了AgNWs结之间的接触电阻。由于CNF / GO基板与AgNWs层之间的协同作用具有出色的局部表面等离子体特性，该三明治结构膜不仅在可见光和近红外频率下实现了高达80％的有效宽带光吸收，而且还证明了出色的表面增强拉曼散射（SERS）性能。此外，该膜还具有出色的机械耐久性，包括热稳定性和化学稳定性，在恶劣的环境中具有明显的耐高温和耐溶剂腐蚀性能，因此非常适合在柔性光电器件中应用。

更新日期：2020-11-25

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