异质结
材料科学
离子
光电子学
纳米技术
工程物理
化学
物理
有机化学
作者
Shenghua Liu,Chun-Kui Hu,Jiali Lu,Xiaoxiao Lü,Chunxin Lü,Juming Yao,Xia‐Chao Chen,Lei Jiang
出处
期刊:ACS Nano
[American Chemical Society]
日期:2024-03-11
卷期号:18 (12): 9053-9062
标识
DOI:10.1021/acsnano.3c12875
摘要
Photoreceptor cells of vertebrates feature ultrastructural membranes interspersed with abundant photosensitive ion pumps to boost signal generation and realize high gain in dim light. In light of this, superstructured optoionic heterojunctions (SSOHs) with cation-selective nanochannels are developed for manipulating photo-driven ion pumping. A template-directed bottom-up strategy is adopted to sequentially assemble graphene oxide (GO) and PEDOT:PSS into heterogeneous membranes with sculptured superstructures, which feature programmable variation in membrane topography and contain a donor–acceptor interface capable of maintaining electron–hole separation upon photoillumination. Such elaborate design endows SSOHs with a much higher magnitude of photo-driven ion flux against a concentration gradient in contrast to conventional optoionic membranes with planar configuration. This can be ascribed to the buildup of an enhanced transmembrane potential owing to the effective separation of photogenerated carriers at the heterojunction interface and the increase of energy input from photoillumination due to a synergistic effect of reflection reduction, broad-angle absorption, and wide-waveband absorption. This work unlocks the significance of membrane topographies in photo-driven transmembrane transportation and proposes such a universal prototype that could be extended to other optoionic membranes to develop high-performance artificial ion pumps for energy conversion and sensing.
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