RSC主编推荐：纳米领域精彩文章快览（免费阅读原文）

英国皇家化学会（RSC）是一个超过175年历史的面向全球化学家的非营利会员制机构，旗下拥有44种期刊，其中很多在化学领域有很高影响力。为了进一步帮助广大读者追踪科技前沿热点，X-MOL团队与英国皇家化学会合作，推出英国皇家化学会期刊主编推荐的精彩文章快览，本期文章属“纳米领域”，英文点评来自英国皇家化学会期刊的主编。如果大家对我们的解读有更多的补充和点评，欢迎在文末写评论发表您的高见！

Chemical Science (IF: 9.063) 

1. Stable and tunable plasmon resonance of molybdenum oxide nanosheets from the ultraviolet to the near-infrared region for ultrasensitive surface-enhanced Raman analysis

Chem. Sci., 2019, Advance Article 

DOI: 10.1039/C9SC02202C

Preparing color-tunable and stable plasmonic MoO₃ nanomaterials is challenging because there is not an effective preparation strategy or surface protection in heavily doped MoO₃. In this work, researchers from China reported a reliable method to synthesise oxygen-deficient MoO₃ nanosheets using dopamine as a reducing agent and precursor for the formation of a polydopamine surface coating. The nanosheets are stable in the presence of oxidants and can be used as an ultrasensitive SERS substrate.

目前，制备颜色可调且稳定的等离激元三氧化钼（MoO₃）纳米材料仍具有挑战性，这是由于在制备重掺杂MoO₃材料时缺乏有效的制备策略或表面保护措施。西南科技大学和南方科技大学的研究人员报道了一种合成贫氧MoO₃纳米片的可靠方法，将多巴胺作为还原剂和前驱体用于形成聚多巴胺表面涂层。这种纳米片在氧化剂存在下也是稳定的，并且可作为超灵敏表面增强拉曼散射（SERS）基底。

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Nanoscale Horizons (IF: 9.391)

1. Quantum-confined superfluid

Nanoscale Horiz., 2019, Advance Article 

DOI: 10.1039/c9nh00214f

The quantum-confined superfluid (QSF) concept has been proposed for ultrafast mass transport, which is mainly related to the orderly flow of fluid in a nanoconfined space. Both biological ion channels and artificial nanochannels have also demonstrated this phenomenon. Here, the authors’ insight into QSF is introduced, followed by a discussion of the applications to a number of diverse fields across both chemistry and biology.

量子限域超流体（QSF）概念已被提出用于超快质量传输，主要与纳米限域空间中流体的有序流动有关。生物离子通道和人造纳米通道都证明了这种现象。作者在本文中介绍了关于量子限域超流体的见解，并讨论了其在化学和生物学众多领域中的应用。

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2. Band engineering realized by chemical combination in 2D group VA–VA materials

Nanoscale Horiz., 2019, Advance Article 

DOI: 10.1039/c9nh00215d

2D group VA materials with buckled and puckered honeycomb structures have attracted great interest owing to their intriguing electronic properties and wide applications. Herein, the authors realise band engineering by chemically combining different group-VA elements. Among these 2D group VA–VA materials, 7 showed an intrinsic direct bandgap with a suitable gap value. In particular, 2D buckled NX and XBi present special electronic structures, namely, Mexican-hat dispersion and Rashba spin splitting, in the valence and conduction bands, respectively. This theoretical study should promote further experimental realization of 2D group VA–VA materials to improve their potential for nanoelectronic and optoelectronic applications.

具有弯曲和褶皱蜂窝结构的二维VA族材料由于其引人注意的电子性质和广泛的应用吸引了研究人员极大的兴趣。在此，作者通过化学方法组合不同族的VA元素来实现能带工程。在这些VA-VA族二维材料中，7种表现出了具有合适带隙值的本征直接带隙。特别地，二维弯曲的NX和XBi分别在价带和导带中呈现了特殊的电子结构，即“墨西哥帽”分散和Rashba自旋分裂。该理论研究将促进对VA-VA族二维材料的进一步实验研究，以提升其在纳米电子和光电子应用中的潜力。

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3. Highly efficient thermophones based on freestanding single-walled carbon nanotube films

Nanoscale Horiz., 2019, Advance Article 

DOI: 10.1039/c9nh00164f

For the first time, the authors demonstrate that free-standing SWCNT films can be utilized as a material for ultrasound generation, which exhibits state-of-the-art performance. Particularly the efficiency is 4 times greater than the previously reported values. A theoretical model is developed to predict the ultrasound propagation in the space from a thermophone. The authors use the thermoacoustic measurements to indirectly estimate of heat capacity and density of conducting nanomaterials. They introduce a method to remove catalyst particles from carbon nanotubes by resistive heating under vacuum conditions. Therefore, they are able to decrease the heat capacity per unit area of the films and further increase the sound pressure level from our films.

作者首次证明自支撑单壁碳纳米管（SWCNT）薄膜可用作超声波发生材料，同时还表现出了最先进的性能，尤其是该材料的效率是此前报道的4倍。作者还开发了一种理论模型用于预测热致发声器空间中超声波的传播。作者使用热声测量间接估计导电纳米材料的热容量和密度，同时还介绍了一种在真空条件下通过电阻加热来去除碳纳米管中催化剂颗粒的方法。因此，作者能够降低薄膜每单位面积的热容量，并进一步提高薄膜的声压级。

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