A superparamagnetic graphene oxide–Fe3O4 hybrid composite (GO–Fe3O4) was prepared via a simple and effective chemical method. Amino-functionalized Fe3O4 (NH2-Fe3O4) particles are firmly deposited on the oxide sheets. The sheets could prevent NH2-Fe3O4 from agglomeration enable good dispersion of these particles. as-prepared GO–Fe3O4 had much higher thermal stability than oxide. amount loaded GO estimated to be 23.6 wt% by atomic absorption spectrometry. specific saturation magnetization (Ms)...

A novel selective fluorescent chemosensor based on an 8-hydroxyquinoline-appended fluorescein derivative (L1) was synthesized and characterized. Once combined with Cu2+, it displayed high specificity for sulfide anion. Among the various anions, only anion induced revival of fluoresecence L1, which quenched by resulting in “off–on”-type sensing What’s more, sensor retrievable to indicate anions S2–, turn, increased. With addition compound L1 could give rise a visible pink-to-yellow color...

Master-stability functions (MSFs) are fundamental to the study of synchronization in complex dynamical systems. For example, for a coupled oscillator network, necessary condition occur is that MSF at corresponding normalized coupling parameters be negative. To understand typical behaviors various chaotic oscillators key predicting collective dynamics network these oscillators. We address this issue by examining, systematically, MSFs known Our computations and analysis indicate it generic...

In this study, we present the synthesis of reduced graphene oxide/hydroxyapatite (RGO/HA) hybrid materials by an environmental-friendly route. Graphene oxide (GO) was first simultaneously and surface functionalized one-step oxidative polymerization dopamine (PDA). The bioinspired further used for biomimetic mineralization hydroxyapatite. When incubated in a simulated body fluid (SBF), PDA layer enabled efficient interaction between RGO mineral ions to improve bioactivity, promoted formation...

We report the development of a fluorescein-based chemosensor (L1) for monitoring ions or micromolecules (H2S). Copper are known to be toxic at high concentrations and hydrogen sulfide induces various problems. Herein we develop simple method detecting Cu(II) H2S with selectivity sensitivity. The L1 displays on–off–on type fluorescence change alternately added media along reversible forming–separating complex. potential biomedical relevance chemical mechanisms involved in detection is described.

Deep blue emitters are highly desired and intensively investigated for organic light emitting diodes high quality full color display or solid state lighting applications. Here a new strategy deep phosphorescent emission is demonstrated through the incorporaiton of 6-membered metal chelation rings in tetradentate complex molecular structure. The platinum PtNON was synthesized fully characterized. spectra shows peaking at 438 nm 77 K red-shifted, broadened, structureless band centered 508 room...

A series of tetradentate platinum complexes that exhibit both efficient monomer and excimer emission are synthesized. Via small modifications to the cyclometalating ligands, energy can be separately tuned. Devices employing all developed emitters demonstrate impressively high external quantum efficiencies (EQEs) within range 22% 27% for concentrations between 2% 16%. The halogen‐free design also enables fabrication single, doped, white organic light‐emitting diodes (OLEDs) with long...

To search for and exploit quantum manifestations of classical nonlinear dynamics is one the most fundamental problems in physics. Using optomechanical systems as a paradigm, we address this problem from perspective entanglement. We uncover strong fingerprints entanglement two common types dynamical behaviors: periodic oscillations quasiperiodic motion. There transition former to latter an experimentally adjustable parameter changed through critical value. Accompanying process, except small...

Recent research has revealed that complex networks with a smaller average distance and more homogeneous degree distribution are synchronizable. We find, however, synchronization in complex, clustered tends to obey different set of rules. In particular, the synchronizability such network is determined by interplay between intercluster intracluster links. The most synchronizable when numbers two types links approximately equal. presence mismatch, increasing number links, while making smaller,...

A Fe3+ chemosensor L1 was successfully synthesized with a quinoline moiety bound to rhodamine 6G hydrazide. The sensor shows high selectivity and sensitivity in aqueous solution the presence of other trace metal ions organisms, abundant cellular cations prevalent toxic environment. In addition, biological imaging micro computed tomography (MCT) technology studies have demonstrated that could act as turn-on fluorescent for living cells.

An outstanding problem in quantum nonlinear dynamics concerns about the energy-level statistics experimentally accessible relativistic systems. We demonstrate, using chaotic graphene confinements where electronic motions are governed by Dirac equation low-energy regime, that level-spacing those given Gaussian orthogonal ensemble (GOE) random matrices. Weak magnetic field can change to of unitary for electrons graphene. For sufficiently strong field, GOE restored due appearance Landau levels.

The concentrations of wave functions about classical periodic orbits, or quantum scars, are a fundamental phenomenon in physics. An open question is whether scarring can occur relativistic systems. To address this question, we investigate confinements made graphene whose dynamics chaotic and find unequivocal evidence scars. scarred states lead to strong conductance fluctuations the corresponding dots via mechanism resonant transmission.

A new fluorescent sensor L1 based on coumarin was synthesized. It shows high sensitivity and selectivity toward Cu2+ in aqueous solution. The complexation mode corresponding quenching mechanism were elucidated by ESI-MS DFT calculations. In addition, biological imaging studies have demonstrated that can detect living cells.

Various fluorescent nanoparticles have been applied in imaging of tissues or intracellular structures. Searching for biocompatible that can be observed under visible light is fundamental importance the applications living cells. In this study, a simple, template-based route synthesis hydroxyapatite (HA) has developed. Well-dispersed HA prepared by using SiO2 as templates (THA) were surface-functionalized with fluorescein isothiocyanate (FITC), resulting bright and stable particles...

An efficient and stable palladium based excimer emitter was developed capable of exhibiting maximum EQE over 27% achieved nearly 3000 h at 1000 cd m⁻².

The de novo drug design based on SMILES format is a typical sequence-processing problem. Previous methods recurrent neural network (RNN) exhibit limitation in capturing long-range dependency, resulting high invalid percentage generated molecules. Recent studies have shown the potential of Transformer architecture to increase capacity handling sequence data. In this work, encoder module used build generative model. First, we train Transformer-encoder-based model learn grammatical rules known...

Abstract q -Breathers (QBs) represent a quintessential phenomenon of energy localization, manifesting as stable periodic orbits exponentially localized in normal mode space. Their existence can hinder the thermalization process nonlinear lattices. In this work, we employ Newton's method to identify QB solutions diatomic Fermi-Pasta-Ulam-Tsingou chains and perform comprehensive analysis their linear stability. We derive an analytical expression for instability thresholds low-frequency QBs,...

In the study of nonlinear dynamics and chaos, analytically solvable physical models are rare. We investigate classical motion a trapped relativistic particle, subject to an electric magnetic field. When directions fields coincide, integrable. As field rotates away from direction field, transition chaos occurs. Based on approach in previous work nonrelativistic regime [Narimanov , ], we introduce particular Lorentz transformation extend framework regime, which enables us derive Poincaré map...