摘要：The high incidence of cardiovascular disease has led to significant demand for synthetic vascular grafts in clinical ***-proliferation drugs are usually loaded into devices to achieve desirable anti-thrombosis effects after ***,the non-selectiveness of these conventional drugs can lead to the failure of blood vessel reconstruction,leading to potential complications in the long *** address this issue,an asymmetric membrane was constructed through electro-spinning *** bilayer membrane loaded and effectively released nitric oxide(NO),as hoped,from only one *** to the short diffusion distance of NO,it exerted negligible effects on the other side of the membrane,thus allowing selective regulation of different cells on both *** released NO boosted the growth of endothelial cells(ECs)over smooth muscle cells(SMCs)-while on the side where NO was absent,SMCs grew into *** overall structure resembled a native blood vessel,with confluent ECs as the inner layer and layers of SMCs to support *** addition,the membrane preserved the normal function of ECs,and at the same time did not exacerbate inflammatory *** preparing this material type that regulates cell behavior differentially,we describe a new method for its application in the cardiovascular field such as for artificial blood vessels.

摘要：具有高且稳定离子输运特性的二维层状薄膜在纳米流体器件中具有广泛的应用,但是它们的构建仍然是一个相当大的挑战.本文设计并开发了一种超稳定的芳纶纳米纤维/石墨复合薄膜,其内部包含大量的一维和二维纳米受限空间,可以实现超快的离子传输.这种薄膜不仅具有良好的柔性和可拓展性,同时还表现出优异的力学性能,即使在水中浸泡90天仍具有高的拉伸强度(~115.3 MPa).并且该薄膜在低的盐浓度下具有表面电荷控制的离子输运特性,在10^(-4)mol/LKCl浓度下,其离子电导率相对于原始KCl溶液提高了16倍.最重要的是,即使在酸、碱、乙醇等极端环境中浸泡30天以上,薄膜的结构和离子电导率仍保持稳定.分子动力学模拟进一步揭示了薄膜的超稳定性是源于纳米纤维内部强大的链间作用以及纳米纤维与石墨纳米片之间强大的界面相互作用.这种柔性、可扩展、超稳定的芳纶纳米纤维/石墨复合薄膜可能为先进的纳米流体器件在不同极端工作环境下的应用提供一种有效的策略.

摘要：Rational design and controllable synthesis of efficient electrocatalysts for water oxidation is of significant importance for the development of promising energy conversion systems, in particular integrated photoelectrochemical water splitting devices. cobalt oxide(co3O4) nanostructures with mixed valences(Ⅱ,Ⅲ)have been regarded as promising electrocatalysts for the oxygen evolution reaction(OER). They are able to promote catalytic support of OER but with only modest activity. Here, we demonstrate that the OER performance of cubic co3O4 electrocatalyst is obviously improved when they are anchored on delaminated two-dimensional(2D) Ti3C2 MXene nanosheets. Upon activation the overpotential of the hybrid catalyst delivers 300 m V at a current density of 10 m A cm(2) in basic solutions, which is remarkably lower than those of Ti3C2 MXene and co3O4 nanocubes. The strong interfacial electrostatic interactions between two components contribute to the exceptional catalytic performance and stability. The enhanced OER activity and facile synthesis make these co3O4 nanocubes-decorated ultrathin 2D Ti3C2 MXene nanosheets useful for constructing efficient and stable electrodes for high-performance electrochemical water splitting.