▲ Vol 26 Issue 04 |  January 28 , 2024

Ion current rectification properties of non-Newtonian fluids in conical nanochannels

Lei Tang, Yu Hao, Li Peng, Runxin Liu, Yi Zhou and Jie Li

Ionic current rectification generated by the geometric asymmetry of conical nanochannels has gradually attracted attention, but most studies have been limited to Newtonian fluids. In this study, the ionic current rectification characteristics in conical nanochannels filled with non-Newtonian fluids are investigated by numerical simulations. Electroosmotic flow and ion transport in Sisko fluids are solved using the Poisson–Nernst–Planck equations and the Navier–Stokes equations. The effects of the Debye parameter, power-law indexes and applied voltage on the ionic current, axial potential, ion concentration, radial velocity and rectification ratio in the nanopores are investigated. When κRt = 1, the current rectification ratio increases with the increase of the power-law index. However, when κRt = 6, the current rectification ratio first increases and then decreases with the increase of the power law index, reaching the maximum value at n = 1.0. These findings have positive implications for the construction of some nanodevices such as nanofluidic diodes.

https://pubs.rsc.org/en/content/articlelanding/2024/cp/d3cp05184f

▲ Vol 34 Issue 05 |  January 29 , 2024

Shooting Three Birds with One Stone: The Regulation of Zn2+, H2O, and OH Kinetics for Stable Zn-Metal Anodes with a Multifunctional Sieve

Hui Zhang, Yongjian Wu, Jing Yu, Tongtong Jiang, Mingzai Wu

Stable Zn-Metal Anodes

In article number 2301912, Tongtong Jiang, Mingzai Wu, and co-workers propose a multifunctional sieve (MS) consisting of a stearic acid (SA) molecular layer and TiO2 nanosheet to protect Zn electrodes in light of three synchronization functions (accelerating the Zn2+ diffusion rate of reaching the surface of Zn electrode, repelling H2O by SA molecule layer, and binding OH- in TiO2 nanosheet layer).

https://onlinelibrary.wiley.com/doi/10.1002/adfm.202470026

▲ Vol 34 Issue 05 |  January 29 , 2024

飞秒激光仿生调控材料表面浸润性：当前进展与挑战（特邀）

雍佳乐, 吴东

特殊浸润性表面在众多应用领域都发挥着重要作用，因而它的制备不论是在基础科学研究领域还是在工程实际应用方面都具有重要意义。可加工材料广泛以及擅长微纳结构精细设计的优势使飞秒激光成为一种制备各种超浸润微结构表面的有效工具。本综述系统总结了飞秒激光微加工技术在调控材料表面浸润性方面的研究进展。基于飞秒激光对材料表面微纳结构的设计和改性，可以实现超亲水与超疏水性、超疏油性、水下超疏气与超亲气性、液体灌注超滑表面、水下超疏聚合物性、超疏液态金属性、可调黏滞性、各向异性浸润性、智能可调浸润性等一系列极端浸润性质。这些特殊的浸润性使得飞秒激光作用后的材料获得了一系列实际应用，如防水/防油/防气、自清洁、液滴操控、液体图案化、浮力增强、微小液滴/气泡释放、油水分离、水气分离、防结冰、防腐蚀、水下减阻、水雾收集、微流控、柔性电路/电子器件、细胞工程、生物医疗、海水淡化、表面增强拉曼散射等。最后，本文总结讨论了飞秒激光调控材料表面浸润性技术的突出优势以及当前所面临的挑战。

https://www.opticsjournal.net/Articles/OJ6acb4004c7b89f51/Abstract

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静远嘲风（MY Scimage） 成立于2007年，嘲风取自中国传统文化中龙生九子，子子不同的传说，嘲风为守护屋脊之瑞兽，喜登高望远；静远取自成语“宁静致远”，登高莫忘初心，远观而不可务远。

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