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We show that adding ethylenediamine (EDA) to perovskite precursor solution improves the photovoltaic device performance and material stability of high-bromide-content, methylammonium-free, formamidinium cesium lead halide perovskites…

Highly Oriented Pyrolytic Graphite was exfoliated via pulsed discharge plasma in liquid nitrogen. The potential mechanisms involved were investigated by observing the treated surface of the graphitic material and the obtained particles.…

The metal-enhanced fluorescence (MEF) considerably enhances the luminescence for various applications, but its performance largely depends on the dielectric spacer between the fluorophore and plasmonic system. It is still challenging to…

The exfoliation energy, the energy required to peel off an atomic layer from the surface of a bulk material, is of fundamental importance in the science and engineering of two-dimensional materials. Traditionally, the exfoliation energy of…

Materials Science · Physics 2018-05-15 Jong Hyun Jung , Cheol-Hwan Park , Jisoon Ihm

We study ionic liquids composed 1-alkyl-3-methylimidazolium cations and bis(trifluoromethyl-sulfonyl)imide anions ([C$_n$MIm][NTf$_2$]) with varying chain-length $n\!=\!2, 4, 6, 8$ by using molecular dynamics simulations. We show that a…

Soft Condensed Matter · Physics 2017-11-13 Benjamin Golub , Jan Neumann , Lisa-Marie Odebrecht , Ralf Ludwig , Dietmar Paschek

Imidazolium-based ionic liquids are widely used in conjunction with molecular liquids for various applications. Solvation, miscibility and similar properties are of fundamental importance for successful implementation of theoretical…

Chemical Physics · Physics 2015-05-20 Vitaly Chaban

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…

Soft Condensed Matter · Physics 2020-04-22 Simon Gravelle , Catherine Kamal , Lorenzo Botto

Manganese oxide nanosheets were synthesized using liquid phase exfoliation that achieved suspensions in isopropanol with concentrations of up to 0.45 mg/ml. A study of solubility parameters showed that the exfoliation was optimum in DMF…

Phosphorene, a single atomic layer of black phosphorus, has recently emerged as a new twodimensional (2D) material that holds promise for electronic and photonic technology. Here we experimentally demonstrate that the electronic structure…

Black phosphorus (bP) has been recently investigated for next generation nanoelectronic multifunctional devices. However, the intrinsic instability of exfoliated bP (the bP nanoflakes) towards both moisture and air has so far overshadowed…

Phosphorene is a promising two dimensional (2D) material with a direct band gap, high carrier mobility, and anisotropic electronic properties. Phosphorene-based electronic devices, however, are found to degrade upon exposure to air. In this…

Materials Science · Physics 2016-04-14 Gaoxue Wang , William J. Slough , Ravindra Pandey , Shashi P. Karna

This work aims to investigate the corrosion inhibition of the mild steel in the 1 M HCl solution by 1-octyl-3-methylimidazolium hydrogen sulphate 1-butyl-3-methylimidazolium hydrogen sulphate, and 1-octyl-3-methylimidazolium chloride, using…

The development of novel task-specific ionic liquids (ILs) represents an essential challenge in modern organic and physical chemistries. Recently we reported surface-active ILs contained the two well-known organic cations…

Soft Condensed Matter · Physics 2022-01-04 Vitaly V. Chaban

Using the first-principles GW-Bethe-Salpeter equation method, here we study the excited-state properties, including quasi-particle band structures and optical spectra, of phosphorene, a two-dimensional (2D) atomic layer of black phosphorus.…

Materials Science · Physics 2015-07-28 Vellayappan Dheivanayagam S/O Ganesan , Chun Zhang , Yuan Ping Feng , Lei Shen

Transition metal dichalcogenides (TMDCs) have recently shown much promise as thin layer semiconductors in application to transistor technology. TMDCs provide a unique vantage point for studying the properties of phosphorene, a highly…

Mesoscale and Nanoscale Physics · Physics 2017-01-10 Sydney L. Marler

Black phosphorous is a layered material having a high capacity of 2596 mAh/g as a battery electrode, however it suffers from cracking due to high volume expansion during lithiation. These cracks causes loss of electrical contact in the…

Materials Science · Physics 2020-07-21 Burak Ozdemir

In situ electrochemical dilatometry was used to study, for the first time, the expansion behavior of a porous carbon electrode in a pure ionic liquid, 1-ethyl-3-methyl-imidazolium-tetrafluoroborate. For a single electrode, an applied…

Chemical Physics · Physics 2013-06-11 F. Kaasik , T. Tamm , M. M. Hantel , E. Perre , A. Aabloo , E. Lust , M. Z. Bazant , V. Presser

We show that oxidation of phosphorene can lead to the formation of a new family of planar (2D) and tubular (1D) oxides and sub-oxides, most of them insulating. This confers to black phosphorus a native oxide that can be used as barrier…

Mesoscale and Nanoscale Physics · Physics 2015-02-09 A. Ziletti , A. Carvalho , P. E. Trevisanutto , D. K. Campbell , D. F. Coker , A. H. Castro Neto

Room temperature ionic liquids show potential as an alternative to conventional organic membrane solvents mainly due to their properties of low vapor pressure, low volatility and they are often stable. In the present work, the technical…

Chemical Physics · Physics 2014-12-03 Y. S. Ng , N. S. Jayakumar , M. A. Hashim

Black phosphorus exhibits a layered structure similar to graphene, allowing mechanical exfoliation of ultrathin single crystals. Here we demonstrate few-layer black phosphorus field effect devices on Si/SiO$_2$ and measure charge carrier…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 Steven P. Koenig , Rostislav A. Doganov , Hennrik Schmidt , A. H. Castro Neto , Barbaros Oezyilmaz