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氧化石墨烯纳米带杂化粒子是将氧化石墨烯纳米带(GONRs)与其他纳米粒子经π-π键、氢键等结合方式复合在一起,通过这种特殊的结合形态一方面可以有效地防止GONRs的聚积,另一方面新的纳米粒子的引入能够赋予该杂化材料某些特殊的性能,从而有利于充分发挥GONRs杂化材料在聚合物改性等领域的综合性能。本文综述了氧化石墨烯纳米带杂化粒子的制备方法、性能和应用现状。此外,针对GONRs的还原产物石墨烯纳米带(GNRs)的结构、性能、制备方法及其应用领域也进行了系统性地论述。相关研究表明,氧化石墨烯纳米带杂化粒子的设计与制备是氧化石墨烯纳米带迈向实用领域的一个有效途径,而石墨烯纳米作为石墨烯的一种特殊结构的二维变体,继承了石墨烯优良的导电和导热等性能,同时特殊的边缘效应,因而呈现出了更广阔的应用潜力。 相似文献
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Kato T Jiao L Wang X Wang H Li X Zhang L Hatakeyama R Dai H 《Small (Weinheim an der Bergstrasse, Germany)》2011,7(5):574-577
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基于第一性原理计算,研究了掺杂对锯齿形石墨烯纳米带电子输运性质的影响。研究发现,掺杂原子种类、掺杂位置的不同将对电子输运产生极大的影响。当中间散射区域的中心C原子被B杂质原子代替时,在电子输运谱的费米能级以下会出现一个零透射的波谷,而另一侧则不变;当带中心杂质为N原子时情况正好相反。零透射波谷的出现意味着有带隙产生,即发生了从金属到半导体的转变。当杂质原子从中心位置移到带边缘时,波谷将移到费米能级的另一侧,从而引起从受主到施主特征的转变,这是杂质原子的束缚态与边缘态相互作用的结果。 相似文献
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本文采用密度泛函理论,研究了边缘氧化扶手椅型石墨烯纳米带(AGNRs)的电子结构和相对稳定性.结果表明,边缘氧化的AGNRs要比边缘氢化的纳米带稳定.由于氧原子比碳原子具有较大的电负性,边缘氧化AG-NRs表现出金属性能带结构.此外,氧饱和AGNRs比氢饱和AGNRs对电场作用更为敏感,这将有助于在带隙工程中实现其电子结构剪裁. 相似文献
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利用溶液涂覆成膜工艺在涂膜机上制得功能化石墨烯纳米带-纳米碳纤维/热塑性聚氨酯(FGNRs-CNFs/TPU)复合材料薄膜。采用红外光谱、X射线衍射、X射线光电子能谱、透射电镜对所得FGNRs-CNFs的结构与性能进行表征,并结合复合材料薄膜的氧气透过率和体积电阻率测试以及断面形貌观察,研究了不同含量的FGNRs-CNFs对TPU复合材料薄膜阻隔和抗静电性能的影响。结果显示,KH-550成功接枝在GNRs上,并且FGNRs附着在骨架CNFs上形成稳定的FGNRs-CNFs网络结构,这有利于其在TPU中均匀分散;相比于纯TPU薄膜,当FGNRs-CNFs质量分数为1%时,FGNRsCNFs/TPU复合材料薄膜的氧气透过率降低了68.8%,阻隔性能得到大幅度提升;石墨烯纳米带与纳米碳纤维构建导电网络,当添加量为0.6%时,复合材料薄膜导电性能提升了7个数量级,表现出优良的室温导电性能。 相似文献
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Graphene: Thiofluorographene–Hydrophilic Graphene Derivative with Semiconducting and Genosensing Properties (Adv. Mater. 14/2015) 
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下载免费PDF全文 Veronika Urbanová Kateřina Holá Athanasios B. Bourlinos Klára Čépe Adriano Ambrosi Adeline Huiling Loo Martin Pumera František Karlický Michal Otyepka Radek Zbořil 《Advanced materials (Deerfield Beach, Fla.)》2015,27(14):2407-2407
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Carbon: 25th Anniversary Article: Chemically Modified/Doped Carbon Nanotubes & Graphene for Optimized Nanostructures & Nanodevices (Adv. Mater. 1/2014) 下载免费PDF全文
下载免费PDF全文 Uday Narayan Maiti Won Jun Lee Ju Min Lee Youngtak Oh Ju Young Kim Ji Eun Kim Jongwon Shim Tae Hee Han Sang Ouk Kim 《Advanced materials (Deerfield Beach, Fla.)》2014,26(1):2-2
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Superlattices: Substrate‐Induced Graphene Chemistry for 2D Superlattices with Tunable Periodicities (Adv. Mater. 11/2016) 下载免费PDF全文
下载免费PDF全文 Lin Zhou Lei Liao Jinying Wang Jingwen Yu Denghua Li Qin Xie Zhirong Liu Yanlian Yang Xuefeng Guo Zhongfan Liu 《Advanced materials (Deerfield Beach, Fla.)》2016,28(11):2089-2089
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以氧化解压多壁碳纳米管的方法制备了氧化石墨烯纳米带(GONRs),然后用异氟尔酮二异氰酸酯(IPDI)对GONRs化学修饰得到功能氧化石墨烯纳米带。采用溶液成形的方法在涂膜机上制备了功能氧化石墨烯纳米带(IPGONRs)/热塑性聚氨酯(TPU)复合材料薄膜,研究了IP-GONRs对TPU薄膜阻隔性能的影响。扫描电镜和X射线衍射的数据表明,IP-GONRs完全剥离地均匀分散在TPU基体中,并且基本沿着纳米复合材料薄膜表面平行分布。仅添加3.0%(质量分数,下同)的IP-GONRs时,TPU薄膜的氧气透过率便下降67%,因此获得了具有优异阻隔性能的IPGONRs/TPU纳米复合材料薄膜。这种具有优异阻隔性能的复合材料薄膜在食品包装和轻量气体存储容器方面有潜在的应用。 相似文献
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Ferromagnetism: Sulfur Doping Induces Strong Ferromagnetic Ordering in Graphene: Effect of Concentration and Substitution Mechanism (Adv. Mater. 25/2016) 下载免费PDF全文
下载免费PDF全文 Jiří Tuček Piotr Błoński Zdeněk Sofer Petr Šimek Martin Petr Martin Pumera Michal Otyepka Radek Zbořil 《Advanced materials (Deerfield Beach, Fla.)》2016,28(25):5139-5139
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Graphene is a 2D sheet of sp2 bonded carbon atoms and tends to aggregate together, due to the strong π–π stacking and van der Waals attraction between different layers. Its unique properties such as a high specific surface area and a fast mass transport rate are severely blocked. To address these issues, various kinds of 2D holey graphene and 3D porous graphene are either self‐assembled from graphene layers or fabricated using graphene related materials such as graphene oxide and reduced graphene oxide. Porous graphene not only possesses unique pore structures, but also introduces abundant exposed edges and accelerates mass transfer. The properties and applications of these porous graphenes and their composites/hybrids have been extensively studied in recent years. Herein, recent progress and achievements in synthesis and functionalization of various 2D holey graphene and 3D porous graphene are reviewed. Of special interest, electrochemical applications of porous graphene and its hybrids in the fields of electrochemical sensing, electrocatalysis, and electrochemical energy storage, are highlighted. As the closing remarks, the challenges and opportunities for the future research of porous graphene and its composites are discussed and outlined. 相似文献
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Zongping Chen Akimitsu Narita Klaus Müllen 《Advanced materials (Deerfield Beach, Fla.)》2020,32(45):2001893
Graphene nanoribbons (GNRs) are quasi-1D graphene strips, which have attracted attention as a novel class of semiconducting materials for various applications in electronics and optoelectronics. GNRs exhibit unique electronic and optical properties, which sensitively depend on their chemical structures, especially the width and edge configuration. Therefore, precision synthesis of GNRs with chemically defined structures is crucial for their fundamental studies as well as device applications. In contrast to top-down methods, bottom-up chemical synthesis using tailor-made molecular precursors can achieve atomically precise GNRs. Here, the synthesis of GNRs on metal surfaces under ultrahigh vacuum (UHV) and chemical vapor deposition (CVD) conditions is the main focus, and the recent progress in the field is summarized. The UHV method leads to successful unambiguous visualization of atomically precise structures of various GNRs with different edge configurations. The CVD protocol, in contrast, achieves simpler and industry-viable fabrication of GNRs, allowing for the scale up and efficient integration of the as-grown GNRs into devices. The recent updates in device studies are also addressed using GNRs synthesized by both the UHV method and CVD, mainly for transistor applications. Furthermore, views on the next steps and challenges in the field of on-surface synthesized GNRs are provided. 相似文献
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Graphene Biotransformation: Biotransformation and Biological Interaction of Graphene and Graphene Oxide during Simulated Oral Ingestion (Small 24/2018) 下载免费PDF全文
下载免费PDF全文 Daniela Guarnieri Paola Sánchez‐Moreno Antonio Esaú Del Rio Castillo Francesco Bonaccorso Francesca Gatto Giuseppe Bardi Cristina Martín Ester Vázquez Tiziano Catelani Stefania Sabella Pier Paolo Pompa 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(24)
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1D graphene nanoribbons (GNRs) have a bright future in the fabrication of next-generation nanodevices because of their nontrivial electronic properties and tunable bandgaps. To promote the application of GNRs, preparation strategies of miscellaneous GNRs have to be developed. The GNRs prepared by top-down approaches are accompanied by uncontrolled edges and structures. In order to overcome the difficulties, bottom-up methods are widely used in the growth of various GNRs due to controllability of GNRs' features. Among those bottom-up methods, the on-surface synthesis is a promising approach to prepare GNRs with distinct widths, edge/backbone structures, and so forth. Therefore, modified engineering of the GNRs prepared via on-surface synthesis is of great significance in controllable preparation of GNRs and their potential applications. In the past decade, there have been a lot of reports on controllable preparation of GNRs using on-surface synthesis approach. Herein, the advances of GNRs grown via on-surface growth strategy are described. Several growth parameters, the latest advances in the modification of the GNR structure and width, the GNR doping/co-doping with heteroatoms, a variety of GNR heterojunctions, and the device application of GNRs are reviewed. Finally, the opportunities and challenges are discussed. 相似文献
