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Nanophotonic technologies offer great promise for ultra-low power optical signal processing, but relatively few nonlinear-optical phenomena have yet been explored as bases for robust digital…

The role of T-cells within the immune system is to confirm and assess anomalous situations and then either respond to or tolerate the source of the effect. To illustrate how these mechanisms can be harnessed to solve real-world problems, we…

Artificial Intelligence · Computer Science 2010-07-05 Jungwon Kim , William Wilson , Uwe Aickelin , Julie McLeod

Topological insulators (TIs) are a striking example of materials in which topological invariants are manifested in robustness against perturbations. Their most prominent feature is the emergence of topological edge states with reduced…

Mesoscale and Nanoscale Physics · Physics 2018-11-21 S. Klembt , T. H. Harder , O. A. Egorov , K. Winkler , R. Ge , M. A. Bandres , M. Emmerling , L. Worschech , T. C. H. Liew , M. Segev , C. Schneider , S. Höfling

Thermo-optical nonlinearities (TONL) in metasurfaces enable dynamic control of optical properties like transmission, reflection, and absorption through external stimuli such as laser irradiation or temperature. As slow thermal dynamics of…

Photonic neural networks benefit from both the high channel capacity- and the wave nature of light acting as an effective weighting mechanism through linear optics. The neuron's activation function, however, requires nonlinearity which can…

Reactive oxygen and nitrogen species (ROS and RNS) play important roles in various physiological processes (e.g., phagocytosis) and pathological conditions (e.g., cancer). The primary ROS/RNS, viz., hydrogen peroxide, peroxynitrite ion,…

Subcellular Processes · Quantitative Biology 2020-07-08 Keke Hu , Yan-Ling Liu , Alexander Oleinick , Michael Mirkin , Wei-Hua Huang , Christian Amatore

Deep text matching approaches have been widely studied for many applications including question answering and information retrieval systems. To deal with a domain that has insufficient labeled data, these approaches can be used in a…

Information Retrieval · Computer Science 2019-01-01 Chen Qu , Feng Ji , Minghui Qiu , Liu Yang , Zhiyu Min , Haiqing Chen , Jun Huang , W. Bruce Croft

Mitochondrial research is important to ageing, apoptosis, and mitochondrial diseases. In previous works, mitochondria are usually stimulated indirectly by proapoptotic drugs to study mitochondrial development, which is in lack of…

Subcellular Processes · Quantitative Biology 2015-02-18 Yintao Wang , Hao He , Shaoyang Wang , Yaohui Liu , Minglie Hu , Youjia Cao , Chingyue Wang

We analyze the extracellular stimulation current and the charge injection capacitity (CIC) of microelectrodes coated with an insulating layer to prevent toxic electrochemical effects in bioelectronic applications. We show for a…

Medical Physics · Physics 2021-03-10 M. Becker

The origin and function of chirality in DNA, proteins, and other building blocks of life represent a central question in biology. Observations of spin polarization and magnetization associated with electron transport through chiral…

Motivation: LTR retrotransposons are mobile elements that are able, like retroviruses, to copy and move inside eukaryotic genomes. In the present work, we propose a branching model for studying the propagation of LTR retrotransposons in…

Cell Behavior · Quantitative Biology 2016-03-08 Serge Moulin , Nicolas Seux , Stéphane Chrétien , Christophe Guyeux , Emmanuelle Lerat

Using time- and angle-resolved photoemission, we investigate the ultrafast response of excited electrons in the ternary topological insulator (Bi$_{1 x}$Sb$_{x}$)$_2$Te$_3$ to fs-infrared pulses. We demonstrate that at the critical…

Mesoscale and Nanoscale Physics · Physics 2017-05-22 J. Sánchez-Barriga , M. Battiato , E. Golias , A. Varykhalov , L. V. Yashina , O. Kornilov , O. Rader

As emerging atomically ultrathin metal compounds, MXenes show great promise for catalysts and nanoelectronics applications due to the abundant surface terminations and high metallic conductivity. However, the tendency of the interlayer…

Materials Science · Physics 2022-10-18 Qiye Guan , Hejin Yan , Yongqing Cai

We investigate the dielectrophoretic motion of charge-neutral, polarizable nanocolloids through molecular dynamics simulations. Comparison to analytical results derived for continuum systems shows that the discrete charge distributions on…

Soft Condensed Matter · Physics 2009-11-13 Emppu Salonen , Emma Terama , Ilpo Vattulainen , Mikko Karttunen

Probing optical excitations with high resolution is important for understanding their dynamics and controlling their interaction with other photonic elements. This can be done using state-of-the-art electron microscopes, which provide the…

Materials Science · Physics 2021-10-13 Renwen Yu , Andrea Konečná , F. Javier García de Abajo

We theoretically investigate the time-dependent transport of a localized surface plasmon excitation through a linear array of identical and equidistantly spaced metal nanoparticles. Two different signals propagating through the array are…

Mesoscale and Nanoscale Physics · Physics 2018-02-27 P. J. Compaijen , V. A. Malyshev , J. Knoester

Transient electric fields across cell bilayer membranes can lead to electroporation, as well as to cell fusion, and have been extensively studied. We find that transmembrane electric fields similar to those in cells can lead to a massive,…

Materials Science · Physics 2023-06-27 Yu Zhang , Di Jin , Ran Tivony , Nir Kampf , Jacob Klein

Electron microscopy techniques such as electron energy-loss spectroscopy (EELS) facilitate the spatio-spectral characterization of plasmonic nanostructures. In this work, a time-dependent perspective is presented, which significantly…

Identifying the handedness of chiral molecules is of fundamental importance in chemistry, biology, pharmacy, and medicine. Nanophotonic structures allow us to control light at the nanoscale and offer powerful tools for chiral sensing,…

Animal cells in tissues are supported by biopolymer matrices, which typically exhibit highly nonlinear mechanical properties. While the linear elasticity of the matrix can significantly impact cell mechanics and functionality, it remains…