A5034819755- Force Microscopy Techniques and Applications
- 2D Materials and Applications
- Graphene research and applications
- Mechanical and Optical Resonators
- Near-Field Optical Microscopy
- Cellular Mechanics and Interactions
- Nanoparticles: synthesis and applications
- High-Temperature Coating Behaviors
- Gold and Silver Nanoparticles Synthesis and Applications
- Catalytic Processes in Materials Science
- Spectroscopy Techniques in Biomedical and Chemical Research
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Memory and Neural Computing
- MXene and MAX Phase Materials
- Nuclear Materials and Properties
- Conducting polymers and applications
- Plasmonic and Surface Plasmon Research
- Supercapacitor Materials and Fabrication
- Advanced biosensing and bioanalysis techniques
- Quantum Dots Synthesis And Properties
- Diamond and Carbon-based Materials Research
- Advanced Chemical Sensor Technologies
- Lignin and Wood Chemistry
- Advanced Sensor and Energy Harvesting Materials
- Advanced Fluorescence Microscopy Techniques
University of Central Florida
2016-2025
Institut des Sciences Analytiques
2024-2025
Université Claude Bernard Lyon 1
2024-2025
Centre National de la Recherche Scientifique
2024-2025
Center for NanoScience
2021
Oak Ridge National Laboratory
2008-2015
Orlando Clinical Research Center
2015
University of South Florida
2014
Orlando Health
2014
CSInstruments (France)
2011
A review of supercapacitor electrode materials with 0, 1, 2, and 3 dimensional nanostructures.
By creating defects via oxygen plasma treatment, we demonstrate optical properties variation of single-layer MoS2. We found that, with increasing exposure time, the photoluminescence (PL) evolves from very high intensity to complete quenching, accompanied by gradual reduction and broadening MoS2 Raman modes, indicative distortion lattice after bombardment. X-ray photoelectron spectroscopy study shows appearance Mo6+ peak, suggesting creation MoO3 disordered regions in flake. Finally, using...
Achieving tunability of two dimensional (2D) transition metal dichalcogenides (TMDs) functions calls for the introduction hybrid 2D materials by means localized interactions with zero (0D) materials. A metal-semiconductor interface, as in gold (Au) - molybdenum disulfide (MoS2), is great interest from standpoint fundamental science it constitutes an outstanding platform to investigate plasmonic-exciton and charge transfer. The applied aspects such systems introduce new options electronics,...
An extremely thin superstructure is developed for applications in phototransistors and neuromorphic computers.
We demonstrate that the electrical property of a single layer molybdenum disulfide (MoS2) can be significantly tuned from semiconducting to insulating regime via controlled exposure oxygen plasma. The mobility, on-current and resistance MoS2 devices were varied up four orders magnitude by controlling plasma time. Raman spectroscopy, X-ray photoelectron spectroscopy density functional theory studies suggest significant variation electronic properties is caused creation MoO3-rich disordered...
With the ever-increasing demand for low power electronics, neuromorphic computing has garnered huge interest in recent times. Implementing hardware will be a severe boost applications involving complex processes such as image processing and pattern recognition. Artificial neurons form critical part circuits, have been realized with complementary metal-oxide-semiconductor (CMOS) circuitry past. Recently, metal-insulator-transition materials used to realize artificial neurons. Although...
The complex structure of plant cell walls resists chemical or biological degradation, challenging the breakdown lignocellulosic biomass into renewable precursors that could form basis future production green chemicals and transportation fuels. Here, experimental computational results reveal effect tetrahydrofuran (THF)–water cosolvents on lignin its interactions with cellulose in wall drives multiple synergistic mechanisms leading to efficient fractionation valuable precursors. Molecular...
Abstract Optical data sensing, processing and visual memory are fundamental requirements for artificial intelligence robotics with autonomous navigation. Traditionally, imaging has been kept separate from the pattern recognition circuitry. Optoelectronic synapses hold special potential of integrating these two fields into a single layer, where device can record optical data, convert it conductance state store learning recognition, similar to optic nerve in human eye. In this work, trapping...
Soft, fully renewable vitrimers have been introduced to circumvent the lack of recyclability traditional elastomers with permanent cross-linked structures, while preserving advantages rheo-structural stability, and mechanical properties.
The stability of food and water supplies is widely recognized as a global issue fundamental importance. Sensor development for safety by nonconventional assays continues to overcome technological challenges. delicate balance between attaining adequate limits detection, chemical fingerprinting the target species, dealing with complex matrix, operating in difficult environments are still focus current efforts. While traditional pursuit robust recognition methods remains important, emerging...
The present study explores the structural, optical (photoluminescence (PL)), and electrical properties of lateral heterojunctions fabricated by selective exposure mechanically exfoliated few layer two-dimensional (2D) molybdenum disulfide (MoS2) flakes under oxygen (O2)-plasma. Raman spectra plasma exposed MoS2 show a significant loss in structural quality due to lattice distortion creation oxygen-containing domains comparison pristine part same flake. PL mapping evidences complete quenching...
Developing highly efficient semitransparent perovskite solar cells in a simple and rapid fashion will open the window for their applications integrated photovoltaics.
Anthropogenic nanomaterials (ANMs), once produced, will inevitably be present in the environment.
The high carrier mobility of graphene makes it an attractive material for electronics, however, graphene's application optoelectronic systems is limited due to its low optical absorption. We present a cavity-coupled nanopatterned absorber designed sustain temporal and spatial overlap between localized surface plasmon resonance cavity modes, thereby resulting in enhanced absorption up unprecedented value theoretically $(60%)$ experimentally measured $(45%)$ monolayer the technologically...
Uncovering the mechanism behind increase in capacitance of a 2D WS<sub>2</sub> supercapacitor electrode upon cycling using KPFM analysis.
Transition metal catalysts, such as copper oxide, are more attractive alternatives to noble catalysts for emission control due their higher abundance, lower cost, and excellent catalytic activity. In this study, we report the preparation application of a novel CuO/CeO2 catalyst using hydroxyl-rich Ce(OH)x support CO oxidation NO reduction by CO. Compared prepared from regular CeO2 support, new OH-rich (CuO/CeO2–OH) showed significantly activity under different testing conditions. The effect...
A new approach to develop highly ordered magnetite (Fe 3 O 4 ) nanoparticle‐patterned nanohole arrays with desirable magnetic properties for a variety of technological applications is presented. In this work, the sub‐100 nm are successfully fabricated from pre‐ceramic polymer mold using spin‐on nanoprinting (SNAP). These nanoholes then filled monodispersed, spherical Fe nanoparticles about 10 diameter novel drag and drop procedure. The imaged force microscopy (MFM). Magnetometry MFM...
Flexible smart electronics require their energy storage device to be flexible in nature. Developing high-performance devices direct integration of electrode active materials on current collectors satisfy the high electronic/ionic conductivity and long-term durability requirements. Herein, we develop a all-solid-state asymmetric supercapacitor comprised reduced graphene oxide (rGO) core/shell tungsten trioxide/tungsten disulfide (WO3/WS2) nanowire based electrodes. The electrodes synthesized...
Tracking the uptake of nanomaterials by living cells is an important component in assessing both potential toxicity and designing future materials for use vivo. We show that difference local elasticity at site silica (SiO2) nanoparticles confined within a macrophage enables functional ultrasonic interactions. By elastically exciting cell, phase perturbation caused buried SiO2 was detected used to map subsurface populations nanoparticles. Localization mapping stiff chemically synthesized...
Abstract Obtaining compositional information for objects from a distance remains major challenge in chemical and biological sensing. Capitalizing on mid-infrared (IR) excitation of molecules by using quantum cascade lasers (QCLs) invoking pump–probe technique, we present variation the photothermal process that can provide spectral fingerprints substances variable standoff distance. We have evaluated modal variations QCL beam must be taken into account when applying QCLs measurements. The...
Anisotropic electrical conductivity was introduced into bulk polymer derived ceramics by embedded reduced graphene oxide aerogels.