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Chemical Science (IF: 9.063)
1. Facile synthesis of 1D organic–inorganic perovskite micro-belts with high water stability for sensing and photonic applications
Chem. Sci., 2019, Advance Article
DOI: 10.1039/C9SC00162J
Scientists in China have developed one-dimensional organic–inorganic hybrid perovskite micro-belts with the formula [(AD)Pb2Cl5] for sensing and photonic applications, through a simple precipitation synthesis method at room temperature without organic solvents or expensive alkyl halides. The regular arrangement of acridine dye molecules in the material leads to enhanced luminescent properties and high water stability.
北京师范大学和洛阳师范学院的研究人员开发了一种一维有机-无机混合钙钛矿[(AD)Pb2Cl5]（AD = acridine）微带，可用于传感及光学应用。材料的合成可在室温下通过简单的沉淀方法进行，无需有机溶剂或昂贵的卤代烷化合物。吖啶染料分子在材料中呈规则排列，可增强其发光性能，提高水稳定性。
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2. CuxNiy alloy nanoparticles embedded in a nitrogen–carbon network for efficient conversion of carbon dioxide
Chem. Sci., 2019, Advance Article
DOI: 10.1039/C9SC00174C
A team of researchers has embedded CuxNiy alloy nanoparticles in a nitrogen–carbon network as an electrocatalyst for conversion of CO2 to CO with a maximum faradaic efficiency of 94.5%. The catalyst has a high CO2 adsorption capacity, overcomes the disadvantages of single Cu and Ni catalysts, and is very stable due to the stabilisation of the nitrogen–carbon network.
中国科学院化学研究所和高能物理研究所的研究人员将CuxNiy 合金纳米粒子嵌入氮-碳网络中作为电催化剂，催化CO2至CO的转化，法拉第效率最高可达94.5％。该催化剂具有较强的CO2吸附能力，克服了单一铜和镍催化剂的缺点，且由于氮-碳网络的稳定作用而非常稳定。
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Materials Horizons (IF: 13.183)
1. Reversely toposelective vapor deposition at normal pressure and temperature by capillary condensation
Mater. Horiz., 2019, Advance Article
DOI: 10.1039/c8mh01523f
This work shows that superconformal coatings are not only possible but desirable, and that the superconformality can be controlled up to the point where the VD process becomes surface selective. Additionally, because CSVD reverses or bypasses several issues known in many VD methods, such as sensitivity to gas phase impurities or a need for pumping, we argue that our research lays the groundwork for an entirely new VD paradigm. Because the process is very simple, it is easy to apply even by newcomers with a cheap and simple self-made reactor, as instructed in the manuscript.
这项工作表明超共形涂层可行且非常理想，而且这种超共形性是可控的，甚至可以控制在哪个点气相沉积具有表面选择性。此外，由于这种毛细/曲率选择性气相沉积（CSVD）方法解决了现有许多气相沉积方法的一些问题，例如对气相杂质敏感或需要泵送。作者们认为这项研究为一项全新的气相沉积模式奠定了基础。由于该过程非常简单，所以即使是新手使用廉价简单的自制反应器也非常容易操作。
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2. Intramolecular electronic coupling for persistent room-temperature luminescence for smartphone based time-gated fingerprint detection
Mater. Horiz., 2019, Advance Article
DOI: 10.1039/c9mh00130a
A facile strategy is designed to generate an organic molecule, CzDPS, with persistent luminescence by utilizing intramolecular electronic coupling. Unlike in many reported organic molecules with persistent luminescence observed only in crystalline states or aggregates, the intersystem crossing induced by intramolecular electronic coupling does not depend on any intermolecular interactions. As a result, CzDPS can emit persistent luminescence in both aggregates and crosslinked polymers with a doping concentration of only 1 wt%. It is predictable that this strategy will be considered in designing other molecules with persistent luminescence for applications in many composites with low doping concentrations. The persistent luminescence of CzDPS enables its use in time-resolved luminescence imaging of fingerprints by only using a smartphone under a UV LED. This finding provides a facile strategy for forensic investigation of fingerprints which suffers from interference from the scattering and fluorescence signals of substrates.
通过简便的设计策略合成了有机分子CzDPS，该分子利用分子内电子耦合能够持久发光。已有报道的许多有机分子仅在结晶状态或聚集态才观察到持久发光，而CzDPS由分子内电子耦合诱导的系间窜越并不依赖于任何分子间相互作用，因此当其掺杂浓度仅为1 wt％时，也可以在聚集态和交联聚合物中持久发光。可以预见，该策略可应用于设计其他具有持久发光的分子，用于低掺杂浓度的许多复合材料中。CzDPS的持久发光使其能够用于指纹的时间分辨发光成像，该检测仅靠紫外LED和智能手机即可实现。这一发现为指纹的法医学检测提供了一种简便的策略，可避免基底散射和荧光信号的干扰。
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3. Handedness-controlled and solvent-driven actuators with twisted fibers
Mater. Horiz., 2019, Advance Article
DOI: 10.1039/c8mh01647j
We demonstrate that twisted fibers afford impressive start-up torques driven by polar solvating species, exceeding those of previously reported artificial muscles. The handedness-controlled actuating system controllably outputs rotor kinetic energy in the two-unit system, harvests electrical energy in the three-unit system and handles heavy objects in the four-unit system. The handedness-controlled actuating system delivers power to the load with high precision and efficiency. This handedness-controlled conception is extensively observed for twisted fibers containing graphene oxide, nanocomposites and polymers. This approach is conducive to the design of energy harvesters, responsive textiles, electronic skins and agile soft robots.
作者证明了由极性溶剂驱动的扭曲纤维能够提供令人印象深刻的启动力矩，超过了之前报道的人造肌肉。这种手性控制的致动系统在双元系统中可控地输出转子动能，在三元系统中收集电能，在四元系统中能够处理重物。这种手性控制的致动系统能够以高精度和高效率为负载提供动力。在含有氧化石墨烯、纳米复合材料和聚合物的扭曲纤维中能够广泛观察到这种手性控制概念。这种方法有利于设计能量采集器、响应式纺织品、电子皮肤和敏捷软体机器人。
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