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Two-dimensional crystals have emerged as a new class of materials with novel properties that may impact future technologies. Experimentally identifying and characterizing new functional two-dimensional materials in the vast material pool is…

材料科学 · 物理学 2015-06-18 Likai Li , Yijun Yu , Guo Jun Ye , Qingqin Ge , Xuedong Ou , Hua Wu , Donglai Feng , Xian Hui Chen , Yuanbo Zhang

This letter evaluates temporal and thermal stability of a state-of-the-art few-layer phosphorene MOSFET with Al2O3 surface passivation and Ti/Au top gate. As fabricated, the phosphorene MOSFET was stable in atmosphere for at least 100 h.…

材料科学 · 物理学 2015-06-23 Xi Luo , Yaghoob Rahbarihagh , James C. M. Hwang , Han Liu , Yuchen Du , Peide D. Ye

Liquid-phase exfoliation, the use of a sheared liquid to delaminate graphite into few-layer graphene, is a promising technique for the large-scale production of graphene. But the micro and nanoscale fluid-structure processes controlling the…

软凝聚态物质 · 物理学 2020-04-22 Simon Gravelle , Catherine Kamal , Lorenzo Botto

Systematic engineering of atomic-scale low-dimensional defects in two-dimensional nanomaterials is a promising way to modulate the electronic properties of these nanomaterials. Defects at interfaces such as grain boundaries and line defects…

材料科学 · 物理学 2016-01-22 Woosun Jang , Kisung Kang , Aloysius Soon

Black phosphorus (BP) has attracted significant interest as a monolayer or few-layer material with extraordinary electrical and optoelectronic properties. However, degradation in air and other environments is an unresolved issue that may…

A method to produce suspensions of graphene sheets by combining solution-based bromine intercalation and mild sonochemical exfoliation is presented. Ultrasonic treatment of graphite in water leads to the formation of suspensions of graphite…

We report on the preparation of polycarbonate-based graphene (PC/G) composites, by using a simple and scalable solution blending method to disperse single (SLG) and few layer (FLG) graphene flakes, prepared by liquid phase exfoliation…

Semi-metallic graphene and semiconducting monolayer transition metal dichalcogenides (TMDCs) are the two-dimensional (2D) materials most intensively studied in recent years. Recently, black phosphorus emerged as a promising new 2D material…

介观与纳米尺度物理 · 物理学 2014-11-07 Xiaomu Wang , Aaron M. Jones , Kyle L. Seyler , Vy Tran , Yichen Jia , Huan Zhao , Han Wang , Li Yang , Xiaodong Xu , Fengnian Xia

Many technologies based on cells containing alkali-metal atomic vapor benefit from the use of anti-relaxation surface coatings in order to preserve atomic spin polarization. In particular, paraffin has been used for this purpose for several…

Nanomaterials hold much promise for biological applications, but they require appropriate functionalization to provide biocompatibility in biological environments. For non-covalent functionalization with biocompatible polymers, the polymer…

Phosphorene, an emerging elemental two-dimensional (2D) direct band gap semiconductor with fascinating structural and electronic properties distinctively different from other 2D materials such as graphene and MoS2, is promising for novel…

材料科学 · 物理学 2015-04-21 Yongqing Cai , Qingqing Ke , Gang Zhang , Yuan Ping Feng , Vivek B Shenoy , Yong-Wei Zhang

A framework is developed to allow emulsification to be used to fabricate functional structures from, and study the properties of, pristine layered nanosheets. Liquid-exfoliated few-layer graphene and MoS2 are demonstrated to stablize…

We report on detailed microscopy studies of graphene and few-layer-graphene produced by mechanical exfoliation on various semi-conducting substrates. We demonstrate the possibility to prepare and analyze graphene on (001)-GaAs, manganese…

材料科学 · 物理学 2009-11-13 U. Stöberl , U. Wurstbauer , W. Wegscheider , D. Weiss , J. Eroms

We proposed a structure-preserving stabilized parametric finite element method (SPFEM) for the evolution of closed curves under anisotropic surface diffusion with an arbitrary surface energy $\hat{\gamma}(\theta)$. By introducing a…

数值分析 · 数学 2024-04-03 Yulin Zhang , Yifei Li , Wenjun Ying

Phosphorene is a new family member of two-dimensional materials. We observed strong and highly layer-dependent photoluminescence in few-layer phosphorene (2 to 5 layers). The results confirmed the theoretical prediction that few-layer…

介观与纳米尺度物理 · 物理学 2014-09-05 Shuang Zhang , Jiong Yang , Renjing Xu , Fan Wang , Weifeng Li , Muhammad Ghufran , Yong-wei Zhang , Zongfu Yu , Gang Zhang , Qinghua Qin , Yuerui Lu

We study collective plasmon excitations and screening of disordered single- and bilayer black phosphorus beyond the low energy continuum approximation. The dynamical polarizability of phosphorene is computed using a tight-binding model that…

介观与纳米尺度物理 · 物理学 2015-09-30 Fengping Jin , Rafael Roldán , Mikhail I. Katsnelson , Shengjun Yuan

Ion and metal diffusion in metal halide perovskites, charge-transporting layers, and electrodes are detrimental to the performance and stability of perovskite-based photovoltaic devices. As a result, there is an intense research interest in…

Few-layered black phosphorus materials recently attract much attention due to its special electronic properties. As a Consequence, the nano-tube from a single-layer black phosphorus has been theoretically built. The corresponding electronic…

介观与纳米尺度物理 · 物理学 2016-06-22 Kun Cai , Jing Wan , Ning Wei , Qinghua Qin

We report the exfoliation of graphite in aqueous solutions under high shear rate [$\sim10^8s^{-1}$] turbulent flow conditions, with a 100\% exfoliation yield. The material is stabilized without centrifugation at concentrations up to 100 g/L…

Over the past two decades, graphene has been intensively studied because of its remarkable mechanical, optical, and electronic properties. Initial studies were enabled by manual ``Scotch Tape'' exfoliation; nearly two decades later, this…

介观与纳米尺度物理 · 物理学 2025-05-19 Elijah D. S. Courtney , Mihir Pendharkar , Nathan J. Bittner , Aaron L. Sharpe , David Goldhaber-Gordon