共查询到20条相似文献,搜索用时 531 毫秒
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Khaled Ibrahim Inna Novodchuk Kissan Mistry Michael Singh Christopher Ling Joseph Sanderson Michal Bajcsy Mustafa Yavuz Kevin P. Musselman 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(46)
Herein, the previously unrealized ability to grow nanorods and nanotubes of 2D materials using femtosecond laser irradiation is demonstrated. In as short as 20 min, nanorods of tungsten disulfide, molybdenum disulfide, graphene, and boron nitride are grown in solutions. The technique fragments nanoparticles of the 2D materials from bulk flakes and leverages molecular scale alignment by nonresonant intense laser pulses to direct their assembly into nanorods up to several micrometers in length. The laser treatment process is found to induce phase transformations in some of the materials, and also results in the modification of the nanorods with functional groups from the solvent atoms. Notably, the WS2 nanoparticles, which are ablated from semiconducting 2H WS2 crystallographic phase flakes, reassemble into nanorods consisting of the 1T metallic phase. Due to this transition, and the 1D nature of the fabricated nanorods, the WS2 nanorods display substantial improvements in electrical conductivity and optical transparency when employed as transparent conductors. 相似文献
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2D Materials: Large‐Area and High‐Quality 2D Transition Metal Telluride (Adv. Mater. 3/2017) 下载免费PDF全文
Jiadong Zhou Fucai Liu Junhao Lin Xiangwei Huang Juan Xia Bowei Zhang Qingsheng Zeng Hong Wang Chao Zhu Lin Niu Xuewen Wang Wei Fu Peng Yu Tay‐Rong Chang Chuang‐Han Hsu Di Wu Horng‐Tay Jeng Yizhong Huang Hsin Lin Zexiang Shen Changli Yang Li Lu Kazu Suenaga Wu Zhou Sokrates T. Pantelides Guangtong Liu Zheng Liu 《Advanced materials (Deerfield Beach, Fla.)》2017,29(3)
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Shaohui Li Jingwei Chen Mengqi Cui Guofa Cai Jiangxin Wang Peng Cui Xuefei Gong Pooi See Lee 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(6)
Lithium‐ion capacitors (LICs) are promising electrical energy storage systems for mid‐to‐large‐scale applications due to the high energy and large power output without sacrificing long cycle stability. However, due to the different energy storage mechanisms between anode and cathode, the energy densities of LICs often degrade noticeably at high power density, because of the sluggish kinetics limitation at the battery‐type anode side. Herein, a high‐performance LIC by well‐defined ZnMn2O4‐graphene hybrid nanosheets anode and N‐doped carbon nanosheets cathode is presented. The 2D nanomaterials offer high specific surface areas in favor of a fast ion transport and storage with shortened ion diffusion length, enabling fast charge and discharge. The fabricated LIC delivers a high specific energy of 202.8 Wh kg?1 at specific power of 180 W kg?1, and the specific energy remains 98 Wh kg?1 even when the specific power achieves as high as 21 kW kg?1. 相似文献
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Shiying Guo Yupeng Zhang Yanqi Ge Shengli Zhang Haibo Zeng Han Zhang 《Advanced materials (Deerfield Beach, Fla.)》2019,31(39)
2D phosphorene, arsenene, antimonene, and bismuthene, as a fast‐growing family of 2D monoelemental materials, have attracted enormous interest in the scientific community owing to their intriguing structures and extraordinary electronic properties. Tuning the monoelemental crystals into bielemental ones between group‐VA elements is able to preserve their advantages of unique structures, modulate their properties, and further expand their multifunctional applications. Herein, a review of the historical work is provided for both theoretical predictions and experimental advances of 2D V‐V binary materials. Their various intriguing electronic properties are discussed, including band structure, carrier mobility, Rashba effect, and topological state. An emphasis is also given to their progress in fabricated approaches and potential applications. Finally, a detailed presentation on the opportunities and challenges in the future development of 2D V‐V binary materials is given. 相似文献
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Junzhu Li Mingguang Chen Chenhui Zhang Haocong Dong Weiyi Lin Pingping Zhuang Yan Wen Bo Tian Weiwei Cai Xixiang Zhang 《Advanced materials (Deerfield Beach, Fla.)》2019,31(35)
The precise control of the shape and quality of 2D materials during chemical vapor deposition (CVD) processes remains a challenging task, due to a lack of understanding of their underlying growth mechanisms. The existence of a fractal‐growth‐based mechanism in the CVD synthesis of several 2D materials is revealed, to which a modified traditional fractal theory is applied in order to build a 2D diffusion‐limited aggregation (2D‐DLA) model based on an atomic‐scale growth mechanism. The strength of this model is validated by the perfect correlation between theoretically simulated data, predicted by 2D‐DLA, and experimental results obtained from the CVD synthesis of graphene, hexagonal boron nitride, and transition metal dichalcogenides. By applying the 2D‐DLA model, it is also discovered that the single‐domain net growth rate (SD‐NGR) plays a crucial factor in governing the shape and quality of 2D‐material crystals. By carefully tuning SD‐NGR, various fractal‐morphology high‐quality single‐crystal 2D materials are synthesized, achieving, for the first time, the precise control of 2D‐material CVD growth. This work lays the theoretical foundation for the precise adjustment of the morphologies and physical properties of 2D materials, which is essential to the use of fractal‐shaped nanomaterials for the fabrication of new‐generation neural‐network nanodevices. 相似文献
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2D Materials: Synaptic Barristor Based on Phase‐Engineered 2D Heterostructures (Adv. Mater. 35/2018) 下载免费PDF全文
Woong Huh Seonghoon Jang Jae Yoon Lee Donghun Lee Donghun Lee Jung Min Lee Hong‐Gyu Park Jong Chan Kim Hu Young Jeong Gunuk Wang Chul‐Ho Lee 《Advanced materials (Deerfield Beach, Fla.)》2018,30(35)
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High‐Throughput Continuous Production of Shear‐Exfoliated 2D Layered Materials using Compressible Flows 下载免费PDF全文
Reza Rizvi Emily P. Nguyen Matthew D. Kowal Wai H. Mak Sheikh Rasel Md Akibul Islam Ahmed Abdelaal Anup S. Joshi Shahab Zekriardehani Maria R. Coleman Richard B. Kaner 《Advanced materials (Deerfield Beach, Fla.)》2018,30(30)
2D nanomaterials are finding numerous applications in next‐generation electronics, consumer goods, energy generation and storage, and healthcare. The rapid rise of utility and applications for 2D nanomaterials necessitates developing means for their mass production. This study details a new compressible flow exfoliation method for producing 2D nanomaterials using a multiphase flow of 2D layered materials suspended in a high‐pressure gas undergoing expansion. The expanded gas–solid mixture is sprayed in a suitable solvent, where a significant portion (up to 10% yield) of the initial hexagonal boron nitride material is found to be exfoliated with a mean thickness of 4.2 nm. The exfoliation is attributed to the high shear rates ( > 105 s?1) generated by supersonic flow of compressible gases inside narrow orifices and converging‐diverging channels. This method has significant advantages over current 2D material exfoliation methods, such as chemical intercalation and exfoliation, as well as liquid phase shear exfoliation, with the most obvious benefit being the fast, continuous nature of the process. Other advantages include environmentally friendly processing, reduced occurrence of defects, and the versatility to be applied to any 2D layered material using any gaseous medium. Scaling this process to industrial production has a strong possibility of reducing the cost of creating 2D nanomaterials. 相似文献
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Long Pan Yi‐Tao Liu Ming Zhong Xu‐Ming Xie 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(15)
2D materials have received tremendous scientific and engineering interests due to their remarkable properties and broad‐ranging applications such as energy storage and conversion, catalysis, biomedicine, electronics, and so forth. To further enhance their performance and endow them with new functions, 2D materials are proposed to hybridize with other nanostructured building blocks, resulting in hybrid nanostructures with various morphologies and structures. The properties and functions of these hybrid nanostructures depend strongly on the interfacial interactions between 2D materials and other building blocks. Covalent and coordination bonds are two strong interactions that hold high potential in constructing these robust hybrid nanostructures based on 2D materials. However, most 2D materials are chemically inert, posing problems for the covalent assembly with other building blocks. There are usually coordination atoms in most of 2D materials and their derivatives, thus coordination interaction as a strong interfacial interaction has attracted much attention. In this review, recent progress on the coordination‐driven hierarchical assembly based on 2D materials is summarized, focusing on the synthesis approaches, various architectures, and structure–property relationship. Furthermore, insights into the present challenges and future research directions are also presented. 相似文献
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2D Materials: C3N—A 2D Crystalline,Hole‐Free,Tunable‐Narrow‐Bandgap Semiconductor with Ferromagnetic Properties (Adv. Mater. 16/2017) 下载免费PDF全文
Siwei Yang Wei Li Caichao Ye Gang Wang He Tian Chong Zhu Peng He Guqiao Ding Xiaoming Xie Yang Liu Yeshayahu Lifshitz Shuit‐Tong Lee Zhenhui Kang Mianheng Jiang 《Advanced materials (Deerfield Beach, Fla.)》2017,29(16)
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Ming‐Hui Chiu Hao‐Ling Tang Chien‐Chih Tseng Yimo Han Areej Aljarb Jing‐Kai Huang Yi Wan Jui‐Han Fu Xixiang Zhang Wen‐Hao Chang David A. Muller Taishi Takenobu Vincent Tung Lain‐Jong Li 《Advanced materials (Deerfield Beach, Fla.)》2019,31(18)
2D transition metal dichalcogenide (TMD) layered materials are promising for future electronic and optoelectronic applications. The realization of large‐area electronics and circuits strongly relies on wafer‐scale, selective growth of quality 2D TMDs. Here, a scalable method, namely, metal‐guided selective growth (MGSG), is reported. The success of control over the transition‐metal‐precursor vapor pressure, the first concurrent growth of two dissimilar monolayer TMDs, is demonstrated in conjunction with lateral or vertical TMD heterojunctions at precisely desired locations over the entire wafer in a single chemical vapor deposition (VCD) process. Owing to the location selectivity, MGSG allows the growth of p‐ and n‐type TMDs with spatial homogeneity and uniform electrical performance for circuit applications. As a demonstration, the first bottom‐up complementary metal‐oxide‐semiconductor inverter based on p‐type WSe2 and n‐type MoSe2 is achieved, which exhibits a high and reproducible voltage gain of 23 with little dependence on position. 相似文献
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Dong Shi Mingzhi Yang Bin Chang Zizheng Ai Kang Zhang Yongliang Shao Shouzhi Wang Yongzhong Wu Xiaopeng Hao 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(13)
Large‐size ultrathin 2D materials, with extensive applications in optics, medicine, biology, and semiconductor fields, can be prepared through an existing common physical and chemical process. However, the current exfoliation technologies still need to be improved upon with urgency. Herein, a novel and simple “ultrasonic‐ball milling” strategy is reported to effectively obtain high quality and large size ultrathin 2D materials with complete lattice structure through the introduction of moderate sapphire (Al2O3) abrasives in a liquid phase system. Ultimately numerous high‐quality ultrathin h‐BN, graphene, MoS2, WS2, and BCN nanosheets are obtained with large sizes ranging from 1–20 µm, small thickness of ≈1–3 nm and a high yield of over 20%. Utilizing shear and friction force synergistically, this strategy provides a new method and alternative for preparing and optimizing large size ultrathin 2D materials. 相似文献
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2D Materials: Large‐Size 2D β‐Cu2S Nanosheets with Giant Phase Transition Temperature Lowering (120 K) Synthesized by a Novel Method of Super‐Cooling Chemical‐Vapor‐Deposition (Adv. Mater. 37/2016) 下载免费PDF全文
Bo Li Le Huang Guangyao Zhao Zhongming Wei Huanli Dong Wenping Hu Lin‐Wang Wang Jingbo Li 《Advanced materials (Deerfield Beach, Fla.)》2016,28(37):8316-8316
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Yuanzhe Wang Yanyan Zhou Minze Han Yaokai Xi Huanhuan You Xianfeng Hao Zhiping Li Junshuang Zhou Dandan Song Dong Wang Faming Gao 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(16)
A class of 2D layered materials exhibits substantial potential for high‐performance electrocatalysts due to high specific surface area, tunable electronic properties, and open 2D channels for fast ion transport. However, liquid‐phase exfoliation always utilizes organic solvents that are harmful to the environment, and the active sites are limited to edge sites. Here, an environmentally friendly exfoliator in aqueous solution is presented without utilizing any toxic or hazardous substance and active site self‐assembly on the inert base of 2D materials. Benefiting from thin 2D/2D heterostructure and strong interfacial coupling, the resultant highly disordered amorphous NiFe/2D materials (Ti3C2 MXene, graphene and MoS2) thin nanosheets exhibit extraordinary electrocatalytic performance toward oxygen evolution reaction (OER) in alkaline media. DFT results further verify the experimental results. The study emphasizes a viable idea to probe efficient electrocatalysts by means of the synergistic effect of environmentally friendly exfoliator in aqueous solution and active site self‐assembly on the inert base of 2D materials which forms the unique thin 2D/2D heterostructure in‐suit. This new type of heterostructure opens up a novel avenue for the rational design of highly efficient 2D materials for electrocatalysis. 相似文献
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In‐Plane Heterostructures Enable Internal Stress Assisted Strain Engineering in 2D Materials 下载免费PDF全文
Conventional methods to induce strain in 2D materials can hardly catch up with the sharp increase in requirements to design specific strain forms, such as the pseudomagnetic field proposed in graphene, funnel effect of excitons in MoS2, and also the inverse funnel effect reported in black phosphorus. Therefore, a long‐standing challenge in 2D materials strain engineering is to find a feasible scheme that can be used to design given strain forms. In this article, combining the ability of experimentally synthetizing in‐plane heterostructures and elegant Eshelby inclusion theory, the possibility of designing strain fields in 2D materials to manipulate physical properties, which is called internal stress assisted strain engineering, is theoretically demonstrated. Particularly, through changing the inclusion's size, the stress or strain gradient can be controlled precisely, which is never achieved. By taking advantage of it, the pseudomagnetic field as well as the funnel effect can be accurately designed, which opens an avenue to practical applications for strain engineering in 2D materials. 相似文献
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Han‐Wen Hu Golam Haider Yu‐Ming Liao Pradip Kumar Roy Rini Ravindranath Huan‐Tsung Chang Cheng‐Hsin Lu Chang‐Yang Tseng Tai‐Yung Lin Wei‐Heng Shih Yang‐Fang Chen 《Advanced materials (Deerfield Beach, Fla.)》2017,29(43)
A stretchable, flexible, and bendable random laser system capable of lasing in a wide range of spectrum will have many potential applications in next‐ generation technologies, such as visible‐spectrum communication, superbright solid‐state lighting, biomedical studies, fluorescence, etc. However, producing an appropriate cavity for such a wide spectral range remains a challenge owing to the rigidity of the resonator for the generation of coherent loops. 2D materials with wrinkled structures exhibit superior advantages of high stretchability and a suitable matrix for photon trapping in between the hill and valley geometries compared to their flat counterparts. Here, the intriguing functionalities of wrinkled reduced graphene oxide, single‐layer graphene, and few‐layer hexagonal boron nitride, respectively, are utilized to design highly stretchable and wearable random laser devices with ultralow threshold. Using methyl‐ammonium lead bromide perovskite nanocrystals (PNC) to illustrate the working principle, the lasing threshold is found to be ≈10 µJ cm?2, about two times less than the lowest value ever reported. In addition to PNC, it is demonstrated that the output lasing wavelength can be tuned using different active materials such as semiconductor quantum dots. Thus, this study is very useful for the future development of high‐performance wearable optoelectronic devices. 相似文献
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2D Materials: A Free‐Standing and Self‐Healable 2D Supramolecular Material Based on Hydrogen Bonding: A Nanowire Array with Sub‐2‐nm Resolution (Small 21/2017) 下载免费PDF全文
Ming Li Mengyao Song Guitai Wu Zhenyu Tang Yunfeng Sun Yunbin He Jinhua Li Lei Li Haoshuang Gu Xiong Liu Chuang Ma Zefei Peng Zhaoquan Ai David J. Lewis 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(21)