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| 1 | Controlled Nanocutting of Graphene显示文摘Rapid progress in graphene-based applications is calling for new processing techniques for creating graphene components with different shapes,sizes,and edge structures.Here we report a controlled cutting process for graphene sheets,using nickel nanoparticles as a knife that cuts with nanoscale precision.The cutting proceeds via catalytic hydrogenation of the graphene lattice,and can generate graphene pieces with specifi c zigzag or armchair edges.The size of the nanoparticle dictates the edge structure that is produced during the cutting.The cutting occurs along straight lines and along symmetry lines,defined by angles of 60ºor 120º,and is defl ected at free edges or defects,allowing practical control of graphene nano-engineering. | Lijie Ci Zhiping Xu Lili Wang Wei Gao Feng Ding Kevin F.Kelly Boris I.Yakobson Pulickel M.Ajayan | 2008 | Nano Research2008，1，2： | 11 |
| 2 | High thermal conductivity of suspended few-layer hexagonal boron nitride sheets显示文摘推迟的很少层的热传导六角形的硼氮化物(h-BN ) 表试验性地用一个 noncontact micro-Raman 光谱学方法被调查。为单层(1L ) 的一阶的温度系数, bilayer (2L ) 并且九层(9L ) h-BN 表被测量是(当时, electrospinning 准备的 3.41 xide nanofibers 被期望减少了热电导率与体积样品相比。自从它包含复杂样品准备方法,热电导率正在质问的 nanofibers 的大小。在这个工作,我们在场对单个 nanofiber 的热电导率的大小合适的一个新奇方法。一 microelectro 机械(MEMS ) 设备被设计了并且制作了在单个 nanofiber 上执行热传导性大小。一个特殊 Si 模板被设计收集并且转单个 nanofibers 到 MEMS 设备名上吗? | Haiqing Zhou Jixin Zhu Zheng Liu Zheng Yan Xiujun Fan Jian Lin Gunuk Wang Qingyu Yan Ting Yu Pulickel M. Ajayan James M. Tour | 2014 | Nano Research2014，7，8： | 9 |
| 3 | Temperature dependent Raman and photoluminescence of vertical WS2/MoS2 monolayer heterostructures显示文摘Heterostructures from two-dimensional transition-metal dichalcogenides MX_2 have emerged as a hot topic in recent years due to their various fascinating properties. Here, we investigated the temperature dependent Raman and photoluminescence(PL) spectra in vertical stacked WS_2/MoS_2 monolayer heterostructures. Our result shows that both E_(2g)~1 and A_(1g) modes of WS_2 and MoS_2 vary linearly with temperature increasing from 300 to 642 K. The PL measurement also reveals strong temperature dependencies of the PL intensity and peak position. The activation energy of the thermal quenching of the PL emission has been found to be equal to 69.6 meV. The temperature dependence of the peak energy well follows the bandgap shrinkage of bulk semiconductor. | Zhijian Hu Yanjun Bao Ziwei Li Yongji Gong Rui Feng Yingdong Xiao Xiaochun Wu Zhaohui Zhang Xing Zhu Pulickel M. Ajayan Zheyu Fang | 2017 | Science Bulletin2017，62，1： | 5 |
| 4 | Synthesis of large-scale atomic-layer SnS2 through chemical vapor deposition显示文摘因为他们的 ultrathin 厚度和潜在的应用,金属 dichalcogenides 的二维的层在电子学和光电子吸引了许多注意。有 ~ 的乐队差距的单层 SnS 2, 2.6 eV,有用硫的二原子层和锡的一原子层做的一个八面的格子。到日期为止,在那里被限制了作为一个半导体在大规模、高质量的 SnS 2 的生长上报导原子层和他们的性质的调查。这里,我们与一种大水晶尺寸和一致性报导原子层的 SnS 2 的化学蒸汽免职(CVD ) 生长。另外,层的数字能被改变生长时间从单层改变到很少层并且到体积。扫描传播电子显微镜学被用来分析原子结构并且表明叠不同的层的 poly 类型的 2H。结果的 SnS 2 晶体象 150% 一样高与外部量效率被用作一个光电探测器,建议为 optoelectronic 应用的诺言。 | Gonglan Ye Yongji Gong Sidong Lei Yongmin He Bo Li Xiang Zhang Zehua Jin Liangliang Dong Jun Lou Robert Vajtai Wu Zhou Pulickel M. Ajayan | 2017 | Nano Research2017，10，7： | 4 |
| 5 | A Bottom‐Up Approach to Build 3D Architectures from Nanosheets for Superior Lithium Storage显示文摘 | Yongji Gong Shubin Yang Liang Zhan Lulu Ma Robert Vajtai Pulickel M. Ajayan | 2014 | Adv Funct Mater2014，，1： | 1 |
| 6 | Large‐Area Vapor‐Phase Growth and Characterization of MoS<sub>2</sub> Atomic Layers on a SiO<sub>2</sub> Substrate显示文摘 | YongjieZhan ZhengLiu SinaNajmaei Pulickel M.Ajayan JunLou | 2012 | Small2012，，7： | 1 |
| 7 | Tunable Bandgap in Graphene by the Controlled Adsorption of Water Molecules显示文摘 | FazelYavari ChristoKritzinger ChuramaniGaire LiSong HemtejGulapalli TheodorianBorca‐Tasciuc Pulickel M.Ajayan NikhilKoratkar | 2010 | Small2010，，22： | 1 |
| 8 | One-pot synthesis of nickel-cobalt hydroxyfluorides nanowires with ultrahigh energy density for an asymmetric supercapacitor显示文摘A novel and unique nickel-cobalt hydroxyfluorides(NiCo-HF)nanowires material is fabricated by one-pot solvothermal synthesis method for asymmetric supercapacitor.The synthesis mechanism and factors that influence the formation of the Ni Co-HF nanowires have been further discussed.The as-prepared NiCo-HF electrode exhibits a high specific capacitance of 3,372.6 F g^(à1),and the capacitance retention of 94.3%can be achieved at a high current density of 20 A g^(à1)after 10,000 cycles.The outstanding electrochemical performance of the electrode can be attributed to the synergistic effect of the nanowires morphology and complicated redox process of active material.Furthermore,an asymmetric supercapacitor assembled with Ni Co-HF nanowires as positive electrode and activated carbon as the negative electrode shows an ultrahigh energy density of 83.6 Wh kg^(à1)at a power density of 379.4 W kg^(à1)and an excellent cycling stability with 86.3%capacitance retention after 10,000 cycles,indicating that this novel material has great promise for potential application in energy storage device. | Jian-Fang Zhang Yan Wang Xia Shu Cui-Ping Yu Ming-Feng Xiao Jie-Wu Cui Yong-Qiang Qin Hong-Mei Zheng Yong Zhang Dong Chen Pulickel M. Ajayan Yu-Cheng Wu | 2018 | Science Bulletin2018，63，5： | 1 |
| 9 | Alighned carbon nanotube arrays formed by cutting a polymer resin-nanotube composites显示文摘 | PULICKEL M Ajayan STEPHAN O COLLIEX C | 1994 | Science1994，265，26： | 1 |
| 10 | Aligned carbon nanotubes in a thin polymer film显示文摘 | PULICKEL M Ajayan | 1995 | Advanced Materials1995，7，5： | 1 |
| 11 | Improved Charge Transfer at Carbon Nanotube Electrodes显示文摘 | Kalathur S. V.Santhanam AngelRubio Julio A.Alonso Pulickel M.Ajayan | 1999 | Adv Mater1999，，2： | 1 |
| 12 | Single-walled carbon nanotube-polymer composites:strength and weakness显示文摘 | Ajayan Pulickel M Schadler Linda S Giannaris Cindy Rubio Angel | 2000 | Advanced Materials2000，12，10： | 1 |
| 13 | Protecting copper from electrochemical degradation by graphene coating显示文摘 | R.K. Singh Raman P. Chakraborty Banerjee Derrek E. Lobo Hemtej Gullapalli Madusha Sumandasa Ashwin Kumar Lokesh Choudhary Rachel Tkacz Pulickel M. Ajayan Mainak Majumder | 2012 | Carbon2012，，11： | 1 |
| 14 | A composite from poly (m-phenylenevinylene-co-2, 5-dioctoxy-p-phenylenevinylene) and carbon nanotubes: A novel material for molecular optoelectronics显示文摘 | Seamus A Curran Pulickel M Ajayan | 1998 | Adv Mater1998，10，： | 1 |
| 15 | Single-walled carbon nanotube-polymer composites:Strength and weakness显示文摘 | PULICKEL M A LINDA S S CINDY G ANGEL R | 2000 | Adv Mater2000，12，10： | 1 |
| 16 | Correlation between types of defects/vacancies of Bi2S3 nanostructures and their transient photocurrent显示文摘水晶的 nanostructures 拥有影响他们的物理、化学的性质的缺点 / 空缺。在这方面,材料的电子结构能有效地通过缺点工程被调整;因此,在缺点 / 空缺之间的关联和材料的性质吸引了广泛的注意。这里,我们报导双性人 2 由 nanorod 集会与的 S 3 microspheres 暴露 { 211 } 类型的方面和借助于正电子歼灭 spectrometry 的缺点 / 空缺的集中。我们的研究揭示了那锻烧的温度的增加,从 350 ~ 400 ? ? | Mingyang Liu Luqing Wang Pei Dong Liangliang Dong Xifan Wang Jarin Joyner Xiangjian Wan Boris I. Yakobson Robert Vajtai Pulickel Ajayan PolSpanos | 2017 | Nano Research2017，10，7： | 0 |
| 17 | Large Rabi splitting obtained in Ag‐WS2 strong‐coupling heterostructure with optical microcavity at room temperature显示文摘Manipulation of light-matter interaction is critical in modern physics, especially in the strong coupling regime, where the generated half-light, half-matter bosonic quasiparticles as polaritons are important for fundamental quantum science and applications of optoelectronics and nonlinear optics. Two-dimensional transition metal dichalcogenides (TMDs) are ideal platforms to investigate the strong coupling because of their huge exciton binding energy and large absorption coefficients. Further studies on strong exciton-plasmon coupling by combining TMDs with metallic nanostructures have generated broad interests in recent years. However, because of the huge plasmon radiative damping, the observation of strong coupling is significantly limited at room temperature. Here, we demonstrate that a large Rabi splitting (~300 meV) can be achieved at ambient conditions in the strong coupling regime by embedding Ag-WS2 heterostructure in an optical microcavity. The generated quasiparticle with part-plasmon, part-exciton and part-light is analyzed with Hopfield coefficients that are calculated by using three-coupled oscillator model. The resulted plasmon-exciton polaritonic hybrid states can efficiently enlarge the obtained Rabi splitting, which paves the way for the practical applications of polaritonic devices based on ultrathin materials. | Bowen Li Shuai Zu Zhepeng Zhang Liheng Zheng Qiao Jiang Bowen Du Yang Luo Yongji Gong Yanfeng Zhang Feng Lin Bo Shen Xing Zhu Pulickel M. Ajayan Zheyu Fang | 2019 | Opto-Electronic Advances2019，2，5： | 0 |
| 18 | The modulating effect of N coordination on single-atom catalysts researched by Pt-N_(x)-C model through both experimental study and DFT simulation显示文摘N-doped carbon-based single-atom catalysts(NC-SACs) are widely researched in various electrochemical reactions due to high metal atom utilization and catalytic activity.The catalytic activity of NC-SACs originates from the coordinating structure between single metal site(M) and the doped nitrogen(N) in carbon matrix by forming M-N_(x)-C structure(1≤x≤4).The M-N4-C structure is widely considered to be the most stable and effective catalytic site.However,there is no in-depth research for the 'x' modulation in Pt-Nx-C structure and the corresponding catalytic properties.Herein,atomically dispersed Pt on N-doped carbon(Pt-NC) with Pt-Nx-C structure(1≤x≤4),as a research model,is fabricated by a ZIF-8 template and applied to catalytic oxygen reduction.Different carbonization temperatures are used to control N loss,and then modulate the N coordination of Pt-Nx-C structure.The Pt-NC has the predictable low half-wave potential(E_(1/2)) of 0.72 V vs RHE compared to the Pt/C 20% of 0.81 V due to low Pt content.Remarkably,the Pt-NC shows a high onset potential(1.10 V vs RHE,determined for j=-0.1 mA cm^(2)) and a high current density of 5.2 mA cm^(-2),more positive and higher than that of Pt/C 20%(0.96 V) and 4.9 mA cm^(-2),respectively.As the structural characterization and DFT simulation confirmed,the reducing PtN coordination number induces low valence of Pt atoms and low free energy of oxygen reduction,which is responsible for the improved catalytic activity.Furthermore,the Pt-NC shows high mass activity(172 times higher than that of Pt/C 20%),better stability and methanol crossover resistance. | Mengmeng Fan Jiewu Cui Junjie Zhang Jingjie Wu Shuangming Chen Li Song Zixing Wang Ao Wang Robert Vajtai Yucheng Wu Pulickel MAjayan Jianchun Jiang Dongping Sun | 2021 | Journal of Materials Science & Technology2021，，32： | 0 |
| 19 | Thermodynamics of order and randomness in dopant distributions inferred from atomically resolved imaging显示文摘Exploration of structure-property relationships as a function of dopant concentration is commonly based on mean field theories for solid solutions.However,such theories that work well for semiconductors tend to fail in materials with strong correlations,either in electronic behavior or chemical segregation.In these cases,the details of atomic arrangements are generally not explored and analyzed.The knowledge of the generative physics and chemistry of the material can obviate this problem,since defect configuration libraries as stochastic representation of atomic level structures can be generated,or parameters of mesoscopic thermodynamic models can be derived.To obtain such information for improved predictions,we use data from atomically resolved microscopic images that visualize complex structural correlations within the system and translate them into statistical mechanical models of structure formation.Given the significant uncertainties about the microscopic aspects of the material’s processing history along with the limited number of available images,we combine model optimization techniques with the principles of statistical hypothesis testing.We demonstrate the approach on data from a series of atomically-resolved scanning transmission electron microscopy images of Mo_(x)Re_(1-x)S_(2) at varying ratios of Mo/Re stoichiometries,for which we propose an effective interaction model that is then used to generate atomic configurations and make testable predictions at a range of concentrations and formation temperatures. | Lukas Vlcek Shize Yang Yongji Gong Pulickel Ajayan Wu Zhou Matthew FChisholm Maxim Ziatdinov Rama K.Vasudevan Sergei V.Kalinin | 2021 | npj Computational Materials2021，，1： | 0 |
| 20 | Pseudobrookite based heterostructures for efficient electrocatalytic hydrogen evolution显示文摘Synthesis of ultrathin heterostructures has received much attention in the recent past due to their unique physical and chemical properties.In this work,we report the synthesis of Fe_(2)TiO_(5)–TiO_(2)heterostructures using a simple hydrothermal technique employing natural ilmenite as the source.Hierarchically arranged nanostructures with interconnected nano-petals of thickness around 50 nm are obtained.The electrocatalytic properties of the synthesized Fe_(2)TiO_(5)–TiO_(2)heterostructures are enhanced following the cathodization technique.The observed enhancement in the synthesized materials’electrocatalytic property can be attributed to the defect-rich Fe_(2-x)TiO_(5-x)-TiO_(2-x)heterostructures.The current approach and technique discussed in this work offer a simple method to synthesize a nanostructured heterostructure material and create defects for enhancing electrocatalytic activity. | Niranjala Fernando Jayashree Swaminathan Francisco Carlos Robles Hernandez Gayan Priyadarshana Chanaka Sandaruwan Wenli Yang Veranja Karunaratne Zixing Wang Gehan AJAmaratunga Nilwala Kottegoda Ashokkumar Meiyazhagan Pulickel M.Ajayan | 2021 | Materials Reports(Energy)2021，1，2： | 0 |
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