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）是一个拥有超过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43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: 8.668)

1. Pd nanosheets with their surface coordinated by radioactive iodide as a high-performance theranostic nanoagent for orthotopic hepatocellular carcinoma imaging and cancer therapy

Chem. Sci., 2018, Advance Article

DOI: 10.1039/C8SC00104A

Researchers in China report a pH-sensitive theranostic platform for cancer diagnosis and treatment. Radiolabelled ultrasmall Pd nanosheets were developed by utilizing the specific adsorption of radioiodine on the surface of the nanosheets. The group reported a labelling efficiency of more than 98% and increased stability in an acidic environment. In vivo studies showed enhanced retention in tumours due to the acidic environment, and SPECT images with zero background signal were achieved in a tumour model. This work has the potential for use in clinical applications.

厦门大学的研究人员报道了一种pH敏感的诊疗平台，可用于癌症诊断和治疗。通过在纳米片表面上特异性吸附放射性碘，他们开发出了一种具有放射性标记的超小型钯（Pd）纳米片。据报道，标记效率超过98％，并且其稳定性在酸性环境中有所增强。体内研究发现经标记的纳米片在肿瘤的酸性环境内会发生积累，同时在肿瘤模型中可以获得零背景信号的单光子发射计算机断层成像（SPECT）图像。这项工作有希望用于临床应用。

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2. Ultrathin palladium nanosheets with selectively controlled surface facets

Chem. Sci., 2018, Advance Article

DOI: 10.1039/C8SC00605A

A team in China have developed a bottom-up synthetic approach to prepare ultrathin 2D Pd nanosheets (PdNSs) with selectively exposed surface facets. The group utilized nanoconfined lamellar mesophases of amphiphilic functional surfactants to template the growth of the PdNSs in aqueous solution. Utilizing surfactants with functional hydrophilic head groups resulted in the epitaxial growth of {100}, {110} and {111}-exposed facets of PdNSs. The {100}-exposed PdNSs demonstrated superior catalytic activity for hydrogen evolution reactions.

南京师范大学和康涅狄格大学的研究人员开发了一种自下而上的合成策略来制备具有选择性暴露晶面的超薄二维（2D）钯（Pd）纳米片（PdNS）。利用两亲性功能表面活性剂的纳米受限层状中间相为模板，在水溶液中生长PdNS。利用具有功能性亲水头部基团的表面活性剂促成了PdNSs的{100}、{110}和{111}暴露晶面的外延生长。其中，具有{100}暴露晶面的PdNS对于析氢反应表现出优异的催化活性。

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Nanoscale Horizons (IF: pending)

1. Graphdiyne: a superior carbon additive to boost the activity of water oxidation catalysts

Nanoscale Horiz., 2018, Advance Article

DOI: 10.1039/C8NH00027A

Full-carbon materials are promising additives to boost water oxidation activity, but the improvement of oxygen evolution with the commonly used graphene and carbon nanotubes is still limited. Graphdiyne is a new carbon allotrope, and this study reports how it is a superior carbon additive to boost the activity of water oxidation catalysts.

全碳材料是有前景的能提高水氧化活性的添加剂，但通常使用的石墨烯和碳纳米管对析氧的改善很有限。Graphdiyne是一种新型的碳同素异形体，本篇研究介绍了它是如何作为优质的碳添加剂来提高水氧化催化剂的活性。

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2. 'Painting' nanostructured metals—playing with liquid metal

Nanoscale Horiz., 2018, Advance Article

DOI: 10.1039/C8NH00045J

For the first time, the authors of this study propose the concept of using liquid gallium (Ga) as the paint to develop a painting–alloying (annealing)–dealloying strategy, through which metallic nanostructures can be 'painted' onto metallic foils. The painting strategy is very general and up to seven kinds of nanostructures (Au, Ag, Pd, Pt, Cu, Co and Ni) can be painted onto the corresponding metallic foils. Moreover, just like painting, nanostructured metallic films with complicated patterns could be formed without any shape and size limitations.

本文作者首次使用液体金属镓（Ga）作为涂料开发了一种涂漆-合金化（退火）-去合金化的策略，将金属纳米结构“涂”到金属箔上。这种策略适用于多种材料，可以将7种纳米结构（Au、Ag、Pd、Pt、Cu、Co和Ni）涂到相应的金属箔上。而且，就像绘画一样，可以不受形状和尺寸的限制获得复杂图案的纳米结构金属膜。

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3. Reassessment of long circulation via monitoring of integral polymeric nanoparticles justifies a more accurate understanding

Nanoscale Horiz., 2018, Advance Article

DOI: 10.1039/C8NH00010G

Long circulation has become a paradigm in nanoscale drug delivery. However, the long-hold perception of long circulation is flawed because it is heavily based on monitoring a surrogate (i.e. a drug or a label). This study reassesses the phenomenon of long circulation by monitoring the integral nanoparticles, leading to a more accurate understanding of long circulation. For example, certain pharmacokinetic profiles demonstrate far less "long" circulation time than previously thought.

长循环已成为纳米药物递送的范例。然而，对于长循环的长期观测仍存在缺陷，因为它主要基于对替代品（如药物或标记物）的监测。本研究通过监测整体纳米颗粒来对长循环进行了重新评估，便于更准确地理解长循环。例如，某些药代动力学曲线显示，“长”循环的时间远比之前想象的要少得多。

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