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  • Harnessing complex photonic systems for renewable energy
    Adv. Phys. X (IF 5.0) Pub Date : 2020-05-25
    Y. Tian; N. Li; M. Bonifazi; A. Fratalocchi

    ABSTRACT The study of efficient mechanisms of photon conversion processes into electronic, thermal and chemical energy is an interdisciplinary research field spanning physics, chemistry and material science. In recent years, different physical mechanisms sustained by the engineering of diverse complex photonic structures have emerged to offer significant advances in the area of thermal energy generation

  • Advances in fluorescent carbon dots for biomedical applications
    Adv. Phys. X (IF 5.0) Pub Date : 2020-05-13
    Panagiotis Koutsogiannis; Eleni Thomou; Haralambos Stamatis; Dimitrios Gournis; Petra Rudolf

    ABSTRACT Carbon Dots are an emerging class of carbon-based nanoparticles, which since their discovery have attracted tremendous attention because of their exceptional fluorescent, chemical and mechanical properties as well as high photostability and biocompatibility. This unique combination of outstanding characteristics, together with the ease with which they can be synthesized, qualify carbon dots

  • Few-atom cluster model systems for a hydrogen economy
    Adv. Phys. X (IF 5.0) Pub Date : 2020-04-26
    Jan Vanbuel; Piero Ferrari; Ewald Janssens

    ABSTRACT To increase the share of renewable zero-emission energy sources, such as wind and solar power, in our energy supply, the problem of their intermittency needs to be addressed. One way to do so is by buffering excess renewable energy via the production of hydrogen, which can be stored for later use after re-electrification. Such a clean, renewable energy cycle based on hydrogen is commonly referred

  • Ultrashort field emission in metallic nanostructures and low-dimensional carbon materials
    Adv. Phys. X (IF 5.0) Pub Date : 2020-02-16
    D. J. Park; Y. H. Ahn

    ABSTRACT This study investigates recent advances in photoelectron emission generated by irradiating ultrashort lasers on metallic nanostructures and low-dimensional carbon materials. Recently, primary focus has been on improving the efficiency of emitters, i.e. increasing the number of field-emitted electrons and their respective kinetic energies. An example of this is the modification of the conventional

  • Density-functional tight-binding: basic concepts and applications to molecules and clusters
    Adv. Phys. X (IF 5.0) Pub Date : 2020-02-18
    Fernand Spiegelman; Nathalie Tarrat; Jérôme Cuny; Leo Dontot; Evgeny Posenitskiy; Carles Martí; Aude Simon; Mathias Rapacioli

    ABSTRACT The scope of this article is to present an overview of the Density Functional based Tight Binding (DFTB) method and its applications. The paper introduces the basics of DFTB and its standard formulation up to second order. It also addresses methodological developments such as third order expansion, inclusion of non-covalent interactions, schemes to solve the self-interaction error, implementation

  • Integration of two-dimensional transition metal dichalcogenides with Mie-resonant dielectric nanostructures
    Adv. Phys. X (IF 5.0) Pub Date : 2020-03-09
    Rajeshkumar Mupparapu; Tobias Bucher; Isabelle Staude

    ABSTRACT Integrating transition metal dichalcogenide (TMD) monolayers with dielectric nanostructures exhibiting Mie-like resonances opens a plethora of opportunities in manipulating their excitonic emission in the near-field and far-field regimes, yielding interactions spanning from weak to strong coupling regimes, and routing valley polarized chiral emission, to name just a few. Moreover, there is

  • Needle beams: a review
    Adv. Phys. X (IF 5.0) Pub Date : 2020-03-10
    Ruediger Grunwald; Martin Bock

    ABSTRACT Needle beams are highly attractive for applications which take advantage from a spatial and temporal localization of photons. High intensities, high resolution and extended depth of focus lead to fundamental advances in the optical system performance. Ultrashort, fringe-free, self-reconstructing nondiffracting pulses with undistorted temporal transfer are obtained by generating truncated Bessel

  • Nuclear density functional theory
    Adv. Phys. X (IF 5.0) Pub Date : 2020-03-29
    G. Colò

    ABSTRACT The goal of nuclear structure physics is to provide a complete understanding of the static properties of atomic nuclei, their excitation spectra, their response to external fields and their decays. While it is hard to achieve these goals within a single framework, so that there is no nuclear ‘standard model’, it is clear that nuclear Density Functional Theory (DFT) has probably the widest

  • Diffractive metalens: from fundamentals, practical applications to current trends
    Adv. Phys. X (IF 5.0) Pub Date : 2020-03-31
    Wenwei Liu; Hua Cheng; Jianguo Tian; Shuqi Chen

    ABSTRACT Traditional optical lenses and the corresponding imaging systems, which are based on the optical paths when light propagates inside the bulky media, usually suffer from the bulky size, Abbe-Rayleigh diffraction restricted resolution, and limited responses to different kinds of incident light. Recently, the burgeoning development of metasurfaces comprised of artificial micro- or nano-structures

  • Ionic liquids under nanoscale confinement
    Adv. Phys. X (IF 5.0) Pub Date : 2020-04-03
    Francesca Borghi; Alessandro Podestà

    ABSTRACT The confinement of room-temperature ionic liquids (ILs) in nanoscale geometries, where at least one, but often all three dimensions are reduced down to lengths comparable to the anion-cation size, put the ILs into a quite different condition with respect to their bulk phase. An understanding of the properties of the ILs confined in a nanoscale-constrained geometry is of both fundamental and

  • Ultrafast charge transfer and vibronic coupling in a laser-excited hybrid inorganic/organic interface
    Adv. Phys. X (IF 5.0) Pub Date : 2020-04-10
    Matheus Jacobs; Jannis Krumland; Ana M. Valencia; Haiyuan Wang; Mariana Rossi; Caterina Cocchi

    ABSTRACT Hybrid interfaces formed by inorganic semiconductors and organic molecules are intriguing materials for opto-electronics. Interfacial charge transfer is primarily responsible for their peculiar electronic structure and optical response. Hence, it is essential to gain insight into this fundamental process also beyond the static picture. Ab initio methods based on real-time time-dependent density-functional

  • Semiconductor/dielectric interface in organic field-effect transistors: charge transport, interfacial effects, and perspectives with 2D molecular crystals
    Adv. Phys. X (IF 5.0) Pub Date : 2020-04-10
    Mengjiao Pei; Jianhang Guo; Bowen Zhang; Sai Jiang; Ziqian Hao; Xin Xu; Yun Li

    ABSTRACT Organic field-effect transistors (OFETs) have been the hotspot in information science for many years as the most fundamental building blocks for state-of-the-art organic electronics. During the field-effect modulation of the semiconducting channel, the gate dielectric always has a significant influence on the charge transport behaviours. Hence, understanding of the nature of charge carriers

  • Advances in multi-dimensional coherent spectroscopy of semiconductor nanostructures.
    Adv. Phys. X Pub Date : 2017-09-13
    Galan Moody,Steven T Cundiff

    Multi-dimensional coherent spectroscopy (MDCS) has become an extremely versatile and sensitive technique for elucidating the structure, composition, and dynamics of condensed matter, atomic, and molecular systems. The appeal of MDCS lies in its ability to resolve both individual-emitter and ensemble-averaged dynamics of optically created excitations in disordered systems. When applied to semiconductors

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