RSC主编推荐：材料领域精彩文章快览

2019-03-01 11:46:51 作者：本网整理来源：RSC 分享至：

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“材料领域”，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. Engineering high reversibility and fast kinetics of Bi nanoflakes by surface modulation for ultrastable nickel–bismuth batteries

Chem. Sci., 2019, Advance Article

DOI: 10.1039/C8SC04967J

Bismuth is a promising anode material but it suffers from poor stability. A team of researchers in China have partially oxidised Bi nanoflakes （NFs） by a one-step surface oxidation approach to greatly improve their reversibility and cycling performance. The partially oxidised Bi NFs exhibit good capacity （0.38 mA h cm-2 at 2 mA cm-2）， good rate capability and high long-term stability even after 20,000 cycles. They constructed an aqueous Ni//Bi battery based on this material with 96% capacity retention after 5000 cycles.

铋是一种很有前景的负极材料，但它的稳定性较差。中山大学和哈尔滨理工大学的研究人员通过一步表面氧化法将铋纳米片进行了部分氧化，大大提高了它们的可逆性和循环性能。部分氧化的铋纳米片表现出良好的容量（在2 mA cm-2下为0.38 mA h cm-2）、良好的倍率性能和优秀的长期稳定性（20000次循环后几乎没有容量衰减）。他们基于该材料构建的水性Ni//Bi电池，在5000次循环后容量保持率可达96％。

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2. Rapid room temperature synthesis of red iridium（III） complexes containing a four-membered Ir–S–C–S chelating ring for highly efficient OLEDs with EQE over 30%

Chem. Sci., 2019, Advance Article

DOI: 10.1039/C8SC05605F

A team of scientists in China have developed a method to synthesise red iridium（III） complexes containing a four-membered Ir–S–C–S chelating ring in five minutes at room temperature for use as OLED materials with an EQE over 30%. The complexes were used to make OLEDs with double emissive layers with a maximum brightness over 60,000 cd m-2, a maximum current efficiency of 40.68 cd A-1, a maximum external quantum efficiency （EQEmax） of 30.54%, and an EQE of 26.79% at the practical luminance of 1000 cd m-2.

南京大学和中科院长春应化所的科学家们开发了一种在室温下五分钟内合成含有四元Ir-S-C-S螯合环的红光铱（III）配合物的方法，该配合物可用作有机发光二极管（OLED）材料，外量子效率（EQE）超过了30%。将该配合物用于制备具有双发光层的OLED，最大亮度超过60000 cd m-2，最大电流效率为40.68 cd A-1，最大外量子效率（EQEmax）为30.54%，并且在实际亮度1000cd m-2 时EQE为26.79%。

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Materials Horizons （IF: 13.183）

1. Nano-sandwiched metal hexacyanoferrate/graphene hybrid thin films for in-plane asymmetric micro-supercapacitors with ultrahigh energy density

Mater. Horiz., 2019, Advance Article

DOI: 10.1039/C9MH00063A

In-plane micro-supercapacitors （MSCs） hold promising potential for integration into microelectromechanical systems. Here, we design novel hybrid electrode materials to increase the device capacitance and rationally construct asymmetric MSCs to widen the output voltage window for boosting the energy density. The resultant nano-sandwiched electrode with alternately stacked graphene and metal hexacyanoferrate layers is beneficial to take advantage of the two components. Different from conventional asymmetric supercapacitors with two types of electrode materials, the resultant asymmetric MSCs are based on the same type of coordination polymer-related electrode materials, which is favorable for keeping the reversible charge/discharge process during a long cycling lifetime. Thanks to the novel hybrid thin films and asymmetric structure, the achieved in-plane asymmetric MSCs deliver ultrahigh energy density and long cycling stability while showing outstanding mechanical flexibility and integration capability.

面内微型超级电容器（MSC）在与微电机系统集成方面具有巨大潜力。本文作者设计了一种新颖的混合电极材料来提高器件的电容，并合理构建不对称面内微型超级电容器来扩大输出电压窗口以提高能量密度。通过交替堆叠层状的石墨烯和金属六氰高铁酸盐，得到的纳米三明治形电极充分体现了这两种组分的优点。与由两种电极材料组成的常规不对称超级电容器不同，这里制备的不对称面内微型超级电容器基于相同类型的配位聚合物电极材料，这有利于在长循环寿命中保持可逆的充电/放电过程。归功于新颖的混合薄膜和不对称结构，这种面内不对称微型超级电容器具有超高的能量密度和长循环稳定性，同时具有出色的机械柔性和集成能力。

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2. A flexible conformable artificial organ-damage memory system towards hazardous gas leakage based on a single organic transistor

Mater. Horiz., 2019, Advance Article

DOI: 10.1039/C8MH01577E

Herein, we developed an effective and facile strategy to realize the gas-controlled memory behavior by operating the organic semiconductors at room temperature. The slow doping/dedoping processes enable the accumulation of the sensing signal towards the single prolonged and the long-term repeated NO2 exposure. As a result, the artificial organ-damage memory system can be fabricated only based on a single organic transistor. This facile device geometry well simulates the inhalation, metabolism, and cumulative organ damage caused due to exposure to a hazardous gas. Good flexibility of the organic semiconductor also helps the artificial electronic system to well conform onto the curved surfaces with almost unchanged memory behavior. Our conformable artificial organ-damage memory system opens up a novel opportunity for simulating human organ damage and exhibits the potential for future wearable health monitoring.

作者们开发了一种简单有效的策略，通过在室温下操控有机半导体来实现气体控制的记忆行为。缓慢的掺杂/去掺杂过程使对于单次延长和长期重复的NO2暴露的传感信号累积，从而，仅使用单个有机晶体管就可以制造人造器官损伤记忆系统。这种简便的装置结构能够很好地模拟由于有害气体暴露而引起的吸入、代谢和累积的器官损伤。有机半导体的良好柔性还有助于人造电子系统很好地适应弯曲表面，同时几乎不会引起记忆行为的变化。这种顺应性的人工器官损伤记忆系统为模拟人体器官损伤开辟了新的方向，同时也表现出了用于未来可穿戴健康监测应用的潜力。

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3. Radiation-assisted metal ion interference tumor therapy by barium peroxide-based nanoparticles

Mater. Horiz., 2019, Advance Article

DOI: 10.1039/C8MH01554F

Herein, we have developed a novel concept for tumor treatment by taking advantage of the unique biological effects of released metal ions, anions or molecules in biodegradable nanomaterials. In contrast with existing research, this strategy, which we termed ion interference therapy, directly exploits the biotoxicity of inorganic nanoparticles to combat tumors, which makes the designed nanodrugs more intelligent and more biocompatible. Moreover, by focusing on the biological effects of nanomaterials rather than their physicochemical properties and further applying them in disease treatment, this will strengthen the connection between clinical medicine and nanomaterials and rejuvenate the clinical potential of nanomedicine.

作者们利用生物可降解纳米材料可以释放金属离子、阴离子或分子的独特生物效应，发展了一种新颖的肿瘤治疗概念。与现有研究相比，这种被作者称为“离子干扰疗法”的策略直接利用无机纳米粒子的生物毒性来对抗肿瘤，这使得设计的纳米药物更加智能化，也更具生物相容性。此外，关注纳米材料的生物效应而非物理化学性质，并将其进一步应用于疾病治疗，这将加强临床医学和纳米材料之间的联系，也提高了纳米医学的临床应用潜力。

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Biomaterials Science （IF: 5.831）

1. A one-pot modular assembly strategy for triple-play enhanced cytosolic siRNA delivery

Biomater. Sci., 2019, Advance Article

DOI:10.1039/C8BM01454J

The first small interfering RNA （siRNA） has recently been approved by the FDA for therapeutic use. In this paper the authors have developed a novel one pot assembly method, using a copper free click reaction, to fabricate a siRNA delivery system on the surface of the siRNA/liposome complex. The delivery system has 3 distinct functions; charge-reversal, receptor-mediated endocytosis and cell penetrating peptide （CPP）-induced cell penetration. The authors found that the system had improved blood stability, enhanced cytosolic delivery and superior gene silencing efficiency in vivo in mouse models.

FDA近期批准了首款用于治疗的小干扰RNA（siRNA）药物。在本文中，Biomater. Sci. 期刊副主编、中国药科大学张灿教授等人报道了一种新的一锅组装法，通过无需铜参与的点击反应，在siRNA/脂质体复合物的表面上制造siRNA递送系统。递送系统有三种不同的功能：电荷逆转、受体介导的胞吞作用和细胞穿透肽（CPP）诱导的细胞穿透。作者发现将该系统用于小鼠模型的体内实验时，表现出了改善的血液稳定性、增强的胞浆递送和优秀的基因沉默效率。

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2. Magnetic liposomal emodin composite with enhanced killing efficiency against breast cancer

Biomater. Sci., 2019, Advance Article

DOI:10.1039/C8BM01530A

The active natural compound emodin has promising pharmacological properties but has limited use as it is poorly soluble and has poor targeting ability. In this paper the authors developed a magnetic liposomal emodin nanocomposite （MLE） which had superior chemotherapeutic effects （24.1% higher than free emodin） as well as excellent biocompatability. The MLE could be guided with an external magnetic field to accumulate in the tumor region, demonstrated in an in vivo mice model, confirmed with MR and fluorescence imaging.

活性天然化合物大黄素具有良好的药理学性质，但由于其溶解性和靶向性较差，使用受到了限制。在本文中，作者开发了一种磁性脂质体大黄素纳米复合材料（MLE），它具有优秀的化疗效果（比游离大黄素高24.1%）以及优异的生物相容性。在小鼠模型体内实验中，通过磁共振和荧光成像证实，使用外部磁场可以引导MLE聚集在肿瘤区域。

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