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21篇 您的检索式:作者名="Bilu Liu"
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1Mass production of 2D materials by intermediate-assisted grinding exfoliation显示文摘The scalable and high-efficiency production of 2D materials is a prerequisite to their commercial use.Currently,only graphene and graphene oxide can be produced on a ton scale,and the inability to produce other 2D materials on such a large scale hinders their technological applications.Here we report a grinding exfoliation method that uses micro-particles as force intermediates to resolve applied compressive forces into a multitude of small shear forces,inducing the highly efficient exfoliation of layer materials.The method;referred to as intermediate-assisted grinding exfoliation(iMAGE);can be used for the large-scale production of many 2D materials.As an example;we have exfoliated bulk h-BN into 2D h-BN with large flake sizes;high quality and structural integrity,with a high exfoliation yield of 67%,a high production rate of 0.3 g h^-1 and a low energy consumption of 3.01 x 106 J g^-1.The production rate and energy consumption are one to two orders of magnitude better than previous results.Besides h-BN,this iMAGE technology has been used to exfoliate various layer materials such as graphite,black phosphorus,transition metal dichalcogenides;and metal oxides;provings universality.Molybdenite concentrate,a natural low-cost and abundant mineral;was used as a demo for the large-scale exfoliation production of 2D M0S2 flakes.Our work indicates the huge potential of the iMAGE method to produce large amounts of various 2D materials;which paves the way for their commercial application.Chi Zhang Junyang Tan Yikun Pan Xingke Cai Xiaolong Zou Hui-Ming Cheng Bilu Liu 2020National Science Review2020,7,2:10
2Efficient Synthesis of Graphene Nanoribbons Sonochemically Cut from Graphene Sheets显示文摘We report a facile approach to synthesize narrow and long graphene nanoribbons (GNRs) by sonochemically cutting chemically derived graphene sheets (GSs). The yield of GNRs can reach ~5 wt% of the starting GSs. The resulting GNRs are several micrometers in length, with ~75% being single-layer, and ~40% being narrower than 20 nm in width. A chemical tailoring mechanism involving oxygen-unzipping of GSs under sonochemical conditions is proposed on the basis of experimental observations and previously reported theoretical calculations;it is suggested that the formation and distribution of line faults on graphite oxide and GSs play crucial roles in the formation of GNRs. These results open up the possibilities of the large-scale synthesis and various technological applications of GNRs.Zhong-Shuai Wu Wencai Ren Libo Gao Bilu Liu Jinping Zhao Hui-Ming Cheng 2010Nano Research2010,3,1:10
3Confined van der Waals Epitaxial Growth of Two-Dimensional Large Single-Crystal In_(2)Se_(3) for Flexible Broadband Photodetectors显示文摘The controllable growth of two-dimensional(2D)semiconductors with large domain sizes and high quality is much needed in order to reduce the detrimental efect of grain boundaries on device performance but has proven to be challenging.Here,we analyze the precursor concentration on the substrate surface which signifcantly infuences nucleation density in a vapor deposition growth process and design a confned micro-reactor to grow 2D In_(2)Se_(3) with large domain sizes and high quality.Te uniqueness of this confned micro-reactor is that its size is∼102-103 times smaller than that of a conventional reactor.Such a remarkably small reactor causes a very low precursor concentration on the substrate surface,which reduces nucleation density and leads to the growth of 2D In_(2)Se_(3) grains with sizes larger than 200�m.Our experimental results show large domain sizes of the 2D In_(2)Se_(3) with high crystallinity.Te fexible broadband photodetectors based on the as-grown In_(2)Se_(3) show rise and decay times of 140 ms and 25 ms,efcient response(5.6 A/W),excellent detectivity(7×10^(10) Jones),high external quantum efciency(251%),good fexibility,and high stability.Tis study,in principle,provides an efective strategy for the controllable growth of high quality 2D materials with few grain boundaries.Lei Tang Changjiu Teng Yuting Luo Usman Khan Haiyang Pan Zhengyang Cai Yue Zhao Bilu Liu Hui-Ming Cheng 2019Research2019,,1:7
4Mass production of two-dimensional materials beyond graphene and their applications显示文摘Two-dimensional(2D)materials are promising candidates in wide applications including energy storage and conversion,sensors,flexible devices,etc.The low-cost production of 2D materials with large quantities and demanded quality is the precondition for their commercial uses.For graphene and its derivatives,relatively mature techniques have been established for their scalable preparation and industrial applications.Whereas the mass production of 2D materials beyond graphene is still in its early age and it lacks a summary on this topic.This review systematically describes the state-of-the-art approaches for high-yield preparation of 2D materials beyond graphene,including“top-down”exfoliation and“bottom-up”synthetic approaches.In particular,each method is discussed from the perspectives of its principle,optimization attempts,characteristics of the obtained 2D materials,and its scalability potential.The applications that require massively-produced 2D materials are highlighted,including electrocatalysis,batteries,supercapacitors,mechanical and chemical sensors,as well as electromagnetic interference shielding and microwave absorption devices.Finally,we propose the challenges and opportunities for scalable preparation and commercial applications of 2D materials.Liusi Yang Wenjun Chen Qiangmin Yu Bilu Liu 2021Nano Research2021,14,6:4
5Comparative study of gel-based separated arcdischarge, HiPCO, and CoMoCAT carbon nanotubes for macroelectronic applications显示文摘由于他们有房间温度免职 / 出版处理的优秀电的性质和相容性,为 macroelectronic 应用程序例如的高纯净的围单人赛的半导体的碳 nanotubes 抓住伟人潜力在薄电影的晶体管和显示器背面板电子学。然而,亲戚有利并且为 macroelectronics 遗体的各种各样的 nanotubes 的劣势一个开的问题,尽管有大意义。这里在这糊,我们报导三种主流的碳 nanotubes 的比较、系统的研究(弧分泌物, HiPCO , CoMoCAT )为薄电影的晶体管应用使用便宜基于胶化的专栏层析分开,并且高效晶体管--它为在活跃矩阵使用的晶体管满足要求器官的轻射出的二极管显示有完成。我们观察在取决于 nanotube 直径的晶体管活动性和开/关比率之间的一宗交易。当时有更大的直径的弧分泌物 nanotubes 导致高设备活动性, HiPCO 和 CoMoCAT 有更小的直径的 nanotubes 能提供高开/关比率(> 106 ) 为有可比较的尺寸的晶体管。而且,我们也把基于胶化的分开的 nanotubes 与 nanotubes 用密度坡度超离心机(DGU ) 分开了作比较方法,并且发现分开胶化的 nanotubes 能像分开 DGU 的 nanotubes 一样提供纯净和薄电影的晶体管性能。我们的途径能为未来碳用作批评基础基于 nanotube 的薄电影的 macroelectronics。Jialu Zhang Hui Gui Bilu Liu Jia Liu Chongwu Zhou 2013Nano Research2013,6,12:3
6Chemical Vapor Deposition Growth of Two-Dimensional Compound Materials:Controllability,Material Quality,and Growth Mechanism显示文摘CONSPECTUS:Two-dimensional(2D)compound materials are regarded as promising candidates in many applications,including electronics,optoelectronics,sensors,and flexible devices,because they have high carrier mobility,tunable bandgaps,large specific surface area,atomic-level thickness,and cover lots of other properties.In order to bring 2D compound materials from the laboratory to industrial applications,materials preparation is the first prerequisite.Among all methods to prepare 2D compound materials,chemical vapor deposition(CVD)is one of the promising methods because it can grow a series of 2D compound materials with high quality as well as reasonable cost.So far,many efforts have been made in the CVD growth of 2D compound materials with large domain size,controllable number of layers,fast growth rate,and high-quality features,etc.Therefore,the CVD method has shown much potential for the commercialization of 2D compound materials.However,due to the complicated growth mechanism like sublimation and diffusion processes of multiple precursors,maintaining the controllability,repeatability,and high quality of CVD-grown 2D compound materials is still a big challenge,which prevents their widespread use.In this Account,taking 2D transition metal dichalcogenides(TMDCs)as examples,we review current progress and highlight some promising growth strategies for the CVD growth of 2D compound materials.In detail,the key technology parameters that affect the CVD process,including non-metal precursor,metal precursor,substrate engineering,temperature,and gas flow,are systematically discussed.In addition,we introduce some emerging methods in improving the quality of CVD-grown 2D compound materials(e.g.,repairing the sulfur vacancies by thiol chemistry).Then the current understanding of the CVD growth mechanism is summarized and discussed.In the end,we conclude the current challenges and propose the potential opportunities in this field in terms of the growth of novel 2D compound materials(e.g.,p-type materials,2D materials with high carrier mobility,2D materials with wide bandgaps in the ultraviolet regime or narrow bandgaps in the infrared regime,and 2D nonlayered materials),the post-treatment of CVD-grown samples to obtain new 2D materials and heterostructures,and the exploration of the exotic 2D physics and their promising applications.Overall,we believe this review will guide the future design of controllable CVD systems for the growth of 2D compound materials with good controllability and high quality,laying the foundations for their potential applications.Lei Tang Junyang Tan Huiyu Nong Bilu Liu Hui-Ming Cheng 2021Accounts of Materials Research2021,2,1:3
7Dissolution-precipitation growth of uniform and clean two dimensional transition metal dichalcogenides显示文摘Two dimensional transition metal dichalcogenides(TMDCs)have attracted much interest and shown promise in many applications.However,it is challenging to obtain uniform TMDCs with clean surfaces,because of the difficulties in controlling the way the reactants are supplied to the reaction in the current chemical vapor deposition growth process.Here,we report a new growth approach called’dissolution-precipitation’(DP)growth,where the metal sources are sealed inside glass substrates to control their feeding to the reaction.Noteworthy,the diffusion of metal source inside glass to its surface provides a uniform metal source on the glass surface,and restricts the TMDC growth to only a surface reaction while eliminating unwanted gas-phase reaction.This feature gives rise to highly uniform monolayer TMDCs with a clean surface on centimeter-scale substrates.The DP growth works well for a large variety of TMDCs and their alloys,providing a solid foundation for the controlled growth of clean TMDCs by the fine control of the metal source.Zhengyang Cai Yongjue Lai Shilong Zhao Rongjie Zhang Junyang Tan Simin Feng Jingyun Zou Lei Tang Junhao Lin Bilu Liu Hui-Ming Cheng 2021National Science Review2021,8,3:2
8Interstitial copper-doped edge contact for n-type carrier transport in black phosphorus显示文摘Black phosphorus(BP)has been shown as a promising two-dimensional(2D)material for electronic devices owing to its high carrier mobility.To realize complementary electronic circuits with 2D materials,it is important to fabricate both n-type and p-type transistors with the same channel material.By engineering the contact region with copper(Cu)-doped BP,here we demonstrate an n-type carrier transport in BP field-effect transistors(FETs),which usually exhibit strongly p-type characteristics.Cu metal atoms are found to severely penetrate into the BP flakes,which forms interstitial Cu(Cuint)-doped edge contact and facilitates the electron transport in BP.Our BP FETs in backgated configuration exhibit n-type dominant characteristics with a high electron mobility of^138 cm^2 V^−1 s^−1 at room temperature.The Schottky barrier height for electrons is relatively low because of the edge contact between Cuint-doped BP and pristine BP channel.The contact doping of BP by highly mobile Cu atoms gives rise to n-type transport property of BP FETs.Furthermore,we demonstrate a p-n junction on the same BP flake with asymmetric contact.This strategy on contact engineering can be further extended to other 2D materials.Ziyuan Lin Jingli Wang Xuyun Guo Jiewei Chen Chao Xu Mingqiang Liu Bilu Liu Ye Zhu Yang Chai 2019InfoMat2019,1,2:2
9Six-membered-ring inorganic materials: definition and prospects显示文摘The six-membered ring(SMR)is a common structure unit for numerous material systems.These materials include,but are not limited to,the typical two-dimensional materials such as graphene,h-BN,and transition metal dichalcogenides,as well as three-dimensional materials such as beryllium,magnesium,Mg B2 and Bi2Se3.Although many of these materials have already become‘stars’in materials science and condensed-matter physics,little attention has been paid to the roles of the SMR unit across a wide range of compositions and structures.In this article,we systematically analyze these materials with respect to their very basic SMR structural unit,which has been found to play a deterministic role in the occurrence of many intriguing properties and phenomena,such as Dirac electronic and phononic spectra,superconductivity and topology.As a result,we have defined this group of materials as SMR inorganic materials,opening up a new perspective on materials research and development.With their unique properties,SMR materials deserve wide attention and in-depth investigation from materials design,new physical discoveries to target-wizard applications.It is expected that SMR materials will find niche applications in next-generation information technology,renewable energy,space,etc.Gang Liu Xing-Qiu Chen Bilu Liu Wencai Ren Hui-Ming Cheng 2021National Science Review2021,8,1:1
10Synthesis of high-quality graphene with a pre-determined number of layers显示文摘Zhong-Shuai Wu Wencai Ren Libo Gao Bilu Liu Chuanbin Jiang Hui-Ming Cheng 2008Carbon2008,,2:1
11Threshold voltage tuning and printed complementary transistors and inverters based on thin films of carbon nanotubes and indium zinc oxide显示文摘碳 nanotubes CNT 为打印 macroelectronics 作为重要材料出现了。因为它仍然正在质问使可靠 n 类型成为 CNT 晶体管,然而,完全基于 CNT 完成打印互补 macroelectronics 是困难的。在这研究,我们报导阀值电压 V < 潜水艇 class= “ a-plus-plus ” > 互补晶体管和 inverters 调节并且打印的 th 分别地作为 p 类型和 n 类型晶体管 CNT 和铟锌氧化物 IZO 的薄电影创作了。我们优化了 V <潜水艇class=“ a-plus-plus ”>由作为来源/排水管电极比较 Ti/Au 和 Ti/Pd 的p类型晶体管的 th ,并且观察到有 Ti/Au 电极的 CNT 晶体管展出了改进模式操作 V <潜水艇class=“ a-plus-plus ”> th 我<潜水艇class=“ a-plus-plus ”>在和改进模式操作 V 上<潜水艇class=“ a-plus-plus ”> th > 0 。例如,一在里面: 2:1 的 Zn 比率与 V 产出一只改进模式 n 类型晶体管 < 潜水艇 class= “ a-plus-plus ” > th 1 V 并且我 < 潜水艇 class= “ a-plus-plus ” > 在 5.2 A 的 上。而且,由打印,一部 CNT 薄电影和 IZO 变瘦一样的底层上的电影,我们与 99.6% 供应电压和 16.9 的电压获得的一个产量秋千制作了互补 inverter。这个工作为互补晶体管和电路显示出 p 类型 CNT 和 n 类型 IZO 的混合集成的诺言。Pattaramon Vuttipittayamongkol Fanqi Wu Haitian Chen Xuan Cao Bilu Liu Chongwu Zhou 2015Nano Research2015,8,4:1
12Growth velocity and direct length-sorted growth of short single-walled carbon nanotubes by a metal-catalyst-free chemical vapor deposition process 显示文摘Liu Bilu Ren Wencai Liu Chang 2009ACS Nano2009,3,11:1
13Homologous gradient heterostructure-based artificial synapses for neuromorphic computation显示文摘Gradient heterostructure is one of fundamental interfaces and provides an effective platform to achieve gradually changed properties in mechanics,optics,and electronics.Among different types of heterostructures,the gradient one may provide multiple resistive states and immobilized conductive fila-ments,offering great prospect for fabricating memristors with both high neuromorphic computation capability and repeatability.Here,we invent a memristor based on a homologous gradient heterostructure(HGHS),compris-ing a conductive transition metal dichalcogenide and an insulating homolo-gous metal oxide.Memristor made of Ta–TaS_(x)O_(y)–TaS 2 HGHS exhibits continuous potentiation/depression behavior and repeatable forward/backward scanning in the read-voltage range,which are dominated by multi-ple resistive states and immobilized conductive filaments in HGHS,respec-tively.Moreover,the continuous potentiation/depression behavior makes the memristor serve as a synapse,featuring broad-frequency response(10^(-1)–10^(5) Hz,covering 106 frequency range)and multiple-mode learning(enhanced,depressed,and random-level modes)based on its natural and moti-vated forgetting behaviors.Such HGHS-based memristor also shows good unifor-mity for 5?7 device arrays.Our work paves a way to achieve high-performance integrated memristors for future artificial neuromorphic computation.Changjiu Teng Qiangmin Yu Yujie Sun Baofu Ding Wenjun Chen Zehao Zhang Bilu Liu Hui-Ming Cheng 2023InfoMat2023,5,1:1
14Synthesis of high-quality graphene with a pre-determined number of layers显示文摘Zhong-Shuai Wu Wencai Ren Libo Gao Bilu Liu Chuanbin Jiang Hui-Ming Cheng 2008Carbon2008,,2:1
15Deep ultraviolet hydrogel based on 2D cobalt-doped titanate显示文摘Birefringent optical elements that work in deep ultraviolet(DUV)region become increasingly important these years.However,most of the DUV optical elements have fixed birefringence which is hard to be tuned.Here,we invent a birefringence-tunable optical hydrogel with mechano-birefringence effect in the DUV region,based on two-dimensional(2D)low-cobalt-doped titanate.This 2D oxide material has an optical anisotropy factor of 1.5×10^(-11) C^(2)J^(-1) m-1,larger than maximum value obtained previously,leading to an extremely large specific magneto-optical Cotton-Mouton coefficient of 3.9×10^(6) T^(-2) m-1.The extremely large coefficient enables the fabrication of birefringent hydrogel in a small magnetic field with an ultra-low concentration of 2D oxide material.The hydrogel can stably and continuously modulate 303 nm DUV light with large phase tunability by varying the strain(compression or stretching)from 0 to 50%.Our work opens the door to design and fabricate new proof-of-concept DUV birefringence-tunable element,as demonstrated by optical hydrogels capable of DUV modulation by mechanical stimuli.Youan Xu Baofu Ding Ziyang Huang Lixin Dai Peng Liu Bing Li Wei Cai Hui-Ming Cheng Bilu Liu 2023Light(Science & Applications)2023,12,1:1
16Why do platinum catalysts show diverse electrocatalytic performance?显示文摘As one of the best electrocatalysts for the hydrogen evolution reaction,platinum catalysts are a benchmark for the performance evaluation of new catalysts.However,platinum catalysts reported in the literature show diverse electrocatalytic performances,resulting in the lack of a common reference standard.In this study,we investigated several factors that affect the performance of platinum catalysts by performing experimental measurements and data processing.These factors included the solution resistance,electrolyte temperature,loading quantity,catalyst microstructure,and normalization method of the current density.Finally,we recommended criteria for the performance evaluation of electrocatalysts.Qiangmin Yu Zhiyuan Zhang Heming Liu Xin Kang Shiyu Ge Shaohai Li Lin Gan Bilu Liu 2023Fundamental Research2023,3,5:0
17Achieving highly selective electrochemical CO_(2) reduction to C_(2)H_(4) on Cu nanosheets显示文摘The conversion of CO_(2)into value-added chemicals coupled with the storage of intermittent renewable electricity is attractive.CuO nanosheets with an average size and thickness of~30 and~20 nm have been developed,which are in situ reduced into Cu nanosheets during electrochemical CO_(2)reduction reaction(ECO_(2)RR).The derived Cu nanosheets demonstrate much higher selectivity for C2H4production than commercial CuO derived Cu powder,with an optimum Faradaic efficiency of 56.2%and a partial current density of C_(2)H_(4)as large as 171.0 mA cm^(-2)in a gas diffusion flow cell.The operando attenuated total reflectance-Fourier transform infrared spectra measurements and density functional theory simulations illustrate that the high activity and selectivity of Cu nanosheets originate from the edge sites on Cu nanosheets with a coordinate number around 5(4–6),which facilitates the formation of^(*)CHO rather than^(*)COH intermediate,meanwhile boosting the C-C coupling reaction of^(*)CO and^(*)CHO intermediates,which are the critical steps for C_(2)H_(4)formation.Huan Xie Ruikuan Xie Zhiyuan Zhang Yongyu Pang Yuting Luo Jiong Li Bilu Liu Maria-Magdalena Titirici Guoliang Chai 2023Journal of Energy Chemistry2023,,4:0
18Iodine-assisted ultrafast growth of high-quality monolayer MoS_(2) with sulfur-terminated edges显示文摘Two-dimensional(2D)semiconductors have attracted great attention to extend Moore’s law,which motivates the quest for fast growth of high-quality materials.However,taking MoS_(2) as an example,current methods yield 2D MoS_(2) with a low growth rate and poor quality with vacancy concentrations three to five orders of magnitude higher than silicon and other commercial semiconductors.Here,we develop a strategy of using an intermediate product of iodine as a transport agent to carry metal precursors efficiently for ultrafast growth of high-quality MoS_(2).The grown MoS_(2) has the lowest density of sulfur vacancies(~1.41×10^(12) cm^(−2))reported so far and excellent electrical properties with high on/off current ratios of 108 and carrier mobility of 175 cm^(2) V^(−1) s^(−1).Theoretical calculations show that by incorporating iodine,the nucleation barrier of MoS_(2) growth with sulfur-terminated edges reduces dramatically.The sufficient supply of precursor and low nucleation energy together boost the ultrafast growth of sub-millimeter MoS_(2) domains within seconds.This work provides an effective method for the ultrafast growth of 2D semiconductors with high quality,which will promote their applications.Qinke Wu Jialiang Zhang Lei Tang Usman Khan Huiyu Nong Shilong Zhao Yujie Sun Rongxu Zheng Rongjie Zhang Jingwei Wang Junyang Tan Qiangmin Yu Liqiong He Shisheng Li Xiaolong Zou Hui-Ming Cheng Bilu Liu 2023National Science Open2023,2,4:0
19Advanced materials and energy technologies towards carbon neutrality显示文摘The rapid development of human society has led to much increased consumption of energy,which results in global energy shortage as well as serious environmental concerns due to the use of non-sustainable fossil fuels.For example,the heavy relay on the use of coal and oil leads to carbon emission which is a major factor for global warming and climate change.Developing green and sustainable energy paths becomes more urgent than ever.In this regard,energy sources like sunshine,wind,and water are important to build a clean and sustainable future.For example,one could generate electricity from sun by solar cell devices.Later,such electricity can be stored either in the form of charges by batteries or supercapacitors,or stored in the form of chemicals by electrochemical catalysis conversion,which can be transported over a long distance or stored for a long time for end use.The efficiency of these new energy technologies and devices including photovoltaic,energy storage,and energy conversion,is key which determines whether they can be largescale implemented.High-performance materials play central rules in determining the efficiency of these technologies and therefore largely influence the use of these clean energy technologies and paths toward global mission of carbon neutrality.Bilu Liu Gang Liu Yongbing Tang Hui-Ming Cheng 2022Science China Materials2022,65,12:0
20Biomolecule capturing and sensing on 2D transition metal dichalcogenide canvas显示文摘Since the isolation of graphene in 2004,two-dimensional(2D)materials such as transition metal dichalcogenide(TMD)have attracted numerous interests due to their unique van der Waals structure,atomically thin body,and thickness-dependent properties.In recent years,the applications of TMD in public health have emerged due to their large surface area and high surface sensitivities,as well as their unique electrical,optical,and electrochemical properties.In this review,we focus on state-of-the-art methods to modulate the properties of 2D TMD and their applications in biosensing.Particularly,this review provides methods for designing and modulating 2D TMD via defect engineering and morphology control to achieve multi-functional surfaces for molecule capturing and sensing.Furthermore,we compare the 2D TMD-based biosensors with the traditional sensing systems,deepening our understanding of their action mechanism.Finally,we point out the challenges and opportunities of 2D TMD in this emerging area.Yichao Bai Linxuan Sun Qiangmin Yu Yu Lei Bilu Liu 2023Nano Research Energy2023,2,1:0
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