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. A light-induced nitric oxide controllable release nano-platform based on diketopyrrolopyrrole derivatives for pH-responsive photodynamic/photothermal synergistic cancer therapy

Chem. Sci., 2018, Advance Article

DOI: 10.1039/C8SC03386B

A new dual modal nanoplatform for cancer therapy has been developed by researchers in China. The DPP-NF nanoparticles can be activated by weakly acidic pH conditions to release reactive oxygen species (ROS) to enhance photothermal efficiency and they can also release nitric oxide (NO) to trigger tumour cell death. This synergistic photodynamic/photothermal cancer therapy treatment was shown to be effective both in vitro and in vivo and could lead to potential application in a clinical setting.

中国的研究人员开发了一种可用于癌症治疗的新型双模纳米平台。DPP-NF纳米颗粒可以被弱酸性pH条件激活，释放出活性氧（ROS）以提高光热效率，同时它们还可以释放出一氧化氮（NO）促使肿瘤细胞死亡。这种协同光动力/光热癌症疗法在体外和体内均有效，并且有可能发展为临床环境中的潜在应用。

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2. Length-independent charge transport of well-separated single-crystal TiO₂  long nanowire arrays

Chem. Sci., 2018, Advance Article

DOI: 10.1039/C8SC02335B

Long TiO₂ nanowire arrays of ~ 10 µm have been reported by scientists in China. Previously, TiO₂ nanowire arrays have been limited to 3 - 4 µm because longer nanowires generally lead to slower charge transport. However, in this case, charge transport is 100 times faster than that of nanoparticle films and is length independent. This length-independent charge transport is very important and could be applied to photocatalytic and electrical energy storage systems.

苏州大学的科学家们报道了约10微米长的TiO₂纳米线阵列。此前，TiO₂纳米线阵列的限制为3-4微米，因为更长的纳米线通常会导致较慢的电荷传输。然而，本文报道的纳米线阵列中的电荷传输比纳米颗粒薄膜中要快100倍，并且与长度无关。这种与长度无关的电荷传输非常重要，可应用于光催化和电能储存系统。

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Nanoscale Horizons (IF: 9.391)

1. Doping engineering and functionalization of two-dimensional metal chalcogenides

Nanoscale Horiz., 2018, Advance Article

DOI: 10.1039/C8NH00150B

2D layered metal chalcogenides (MXs) have significant potential for use in flexible transistors, optoelectronics, sensing and memory devices beyond the state-of-the-art technology. To pursue ultimate performance, precisely controlled doping engineering of 2D MXs is desired for tailoring their physical and chemical properties in functional devices. In this review, the authors highlight the recent progress in the doping engineering of 2D MXs, covering substitution, exterior charge transfer, intercalation and the electrostatic doping mechanism. A variety of novel doping engineering examples leading to Janus structures, defect curing effects, zero-valent intercalation and deliberately devised floating gate modulation are discussed together with their intriguing application prospects. The choice of doping strategies and sources for functionalizing MXs is provided to facilitate ongoing research in this field toward multifunctional applications.

二维层状金属硫族化物（MXs）在柔性晶体管、光电子器件、传感和存储器件的应用潜力巨大，有望超越当前最先进的技术。为了追求最佳性能，需要精准控制二维MXs的掺杂工程，以便在功能器件中控制它们的物理和化学性质。在本篇综述中，作者重点介绍了二维MXs材料掺杂技术方面的最新进展，包括替代、外部电荷转移、嵌入和静电掺杂机制，并讨论了一些新型掺杂工程的实例及其颇具吸引力的应用前景，如Janus结构、缺陷固化效应、零价嵌入和刻意设计的浮栅调制。本文提供了多种可供选择的MXs材料功能化的掺杂策略和资源，以促进该领域对多功能应用的持续研究。

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2. NIR light-activated upconversion semiconductor photocatalysts

Nanoscale Horiz., 2018, Advance Article

DOI: 10.1039/C8NH00154E

Harvesting of near infrared (NIR) light is particularly significant to enhance the utilization rate of the cleanest energy on earth – sunlight. Appreciating the unique nonlinear optical properties of upconversion materials for converting low-energy incident light into high-energy radiation, they become the most promising candidates for fabricating NIR light-active photocatalytic systems by integrating with semiconductors. The present review summarizes recent NIR light-active photocatalytic systems based on a sequence of NaYF₄-based, fluoride-based, oxide-based and Ln³⁺ion-doped semiconductor-based photocatalysts for degradation of organic molecules. In addition, an in-depth analysis of various photocatalytic mechanisms and enhancement effects is provided for efficient photo-redox performance of different upconversion semiconductor photocatalysts.

近红外（NIR）光的捕获对于提高地球上最清洁能源——太阳光的利用率极其重要。鉴于上转换材料独特的非线性光学性质能够将低能入射光转换为高能辐射，通过与半导体集成，它们已成为制造NIR光活性的光催化系统中最具前景的候选者。本篇综述总结了近期具有NIR光活性的光催化系统，包括一系列基于NaYF₄、氟化物、氧化物和Ln³⁺离子掺杂半导体的光催化剂，用于降解有机分子。此外，还深入分析了不同上转换半导体光催化剂的高效光氧化还原性能的各种光催化机理及增强效果。

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3. Active tuning of the Fano resonance from a Si nanosphere dimer by the substrate effect

Nanoscale Horiz., 2018, Advance Article

DOI: 10.1039/C8NH00198G

Active tuning of the optical properties of nanoantennas and metasurfaces is desirable for a wide range of applications, including building optical circuits, and signal and information processing. Although all-dielectric materials exhibit many advantages, how to realize the active control of all-dielectric nanostructures still remains to be explored. For the first time the authors combine the high refractive index of Si nanospheres and the phase transition of a VO₂ layer to form a hybrid nanostructure with higher quality factor. They demonstrate the active tuning of the Fano resonance from a Si nanosphere dimer by the substrate effect in the visible range. They have also established that the phase change in the visible range can be described more precisely as a switch between a mid-refractive index state and a low-refractive index state. Furthermore, two different near field features of VO₂ under two states can bring about different interaction situations between VO₂ and Si nanospheres and realize the active control of the Fano resonance. Therefore, these findings suggest that devices based on individual phase-change materials and single-element structures will simplify the design of active photonic devices in the future.

实现纳米天线和超表面光学性质的主动调谐对于其广泛的应用非常有必要，包括构建光电路、以及信号和信息处理。尽管全介电材料具有许多优点，但如何实现全介电纳米结构的主动控制仍有待探索。本文作者首次将Si纳米球的高折射率与VO₂层的相变结合起来，形成具有更高品质因素的混合纳米结构。他们在可见范围内通过基底效应证明了Si纳米球二聚体的法诺共振的主动调谐，另外还确定了可见范围内的相变可被更精确地描述为中折射率状态和低折射率状态之间的转换。此外，VO₂在两种状态下两种不同的近场特征可以引起VO₂和Si纳米球之间不同的相互作用，实现法诺共振的主动控制。因此，这些研究结果表明，基于单个相变材料和单元件结构的器件将在未来简化主动式光子器件的设计。

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