A5077144383- Integrated Circuits and Semiconductor Failure Analysis
- Electron and X-Ray Spectroscopy Techniques
- Advanced Materials Characterization Techniques
- Semiconductor materials and devices
- Spectroscopy and Quantum Chemical Studies
- Advanced Electron Microscopy Techniques and Applications
- Advancements in Battery Materials
- Ion-surface interactions and analysis
- Photosynthetic Processes and Mechanisms
- Advanced Surface Polishing Techniques
- Non-Destructive Testing Techniques
- Catalytic Processes in Materials Science
- Microstructure and mechanical properties
- Advanced Battery Technologies Research
- Hydrogen embrittlement and corrosion behaviors in metals
- Advancements in Photolithography Techniques
- Catalysis and Oxidation Reactions
- Surface and Thin Film Phenomena
- Electronic and Structural Properties of Oxides
- Metal and Thin Film Mechanics
- Electronic Packaging and Soldering Technologies
- Photoreceptor and optogenetics research
- Supercapacitor Materials and Fabrication
- Spectroscopy and Laser Applications
- Electrochemical Analysis and Applications
Nanyang Technological University
2018-2023
Durham University
2015-2016
Warsaw University of Technology
2015
Centre National de la Recherche Scientifique
2007-2013
Nantes Université
2011-2013
Institut des Matériaux Jean Rouxel
2013
Adam Mickiewicz University in Poznań
2013
Polytech Lille
2010
Université de Toulon
2007-2008
Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
2008
LiFePO4 and FePO4 phase distributions of entire cross-sectioned electrodes with various Li content are investigated from nanoscale to mesoscale, by transmission electron microscopy the new forward scattering diffraction technique. The fully delithiated (FePO4) or lithiated particles (LiFePO4) mapped on large fields view (>100 × 100 μm(2)). Heterogeneities in thin thick highlighted at different scales. At nanoscale, statistical analysis 64 000 unambiguously shows that small delithiate first....
Photosystem I (PSI), found in all oxygenic photosynthetic organisms, uses solar energy to drive electron transport with nearly 100% quantum efficiency, thanks fast transfer among antenna chlorophylls and charge separation the reaction center. There is no complete consensus regarding kinetics of elementary steps involved overall trapping, especially rate primary separation. In this work, we employed two-dimensional coherent electronic spectroscopy follow dynamics a monomeric PSI complex from...
Electron-transfer reactions at ambient aqueous interfaces represent one of the most fundamental and ubiquitous chemical reactions. Here dynamics charge transfer to solvent (CTTS) reaction from iodide was probed water/air interface by phase-sensitive transient second-harmonic generation. Using three allowed polarization combinations, distinctive assigned CTTS state evolution subsequent solvating electron-iodine contact pair have been resolved. The is asymmetrically solvated in plane surface,...
We measured two-dimensional electronic spectra of light-harvesting complex II (LHCII) at various temperatures (77, 110, 150, 230, and 295 K) under conditions free from singlet–singlet annihilation. elucidated the temperature-dependent excitation energy transfer dynamics in Chl a manifold LHCII. Global analysis revealed that can be summarized distinct time scales 200 fs up to 15 ps. While fastest with decay ∼0.2–0.3 ps are relatively temperature-independent, lifetimes relative contributions...
Energy equilibration in light-harvesting antenna systems normally occurs before energy is transferred to a reaction center. The mechanism characteristic of the excitation transfer (EET) network antenna. Characterizing this crucial understanding first step photosynthesis. We present our phenomenology-based analysis procedure and results obtaining excitonic levels, spectral linewidths, transfer-rate matrix Light-Harvesting Complex II directly from its 2D electronic spectra recorded at 77 K...
Light-harvesting complex II (LHCII) from the marine green macroalga Bryopsis corticulans is spectroscopically characterized to understand structural and functional changes resulting adaptation intertidal environment. LHCII homologous its counterpart in land plants but has a different carotenoid chlorophyll (Chl) composition. This reflected steady-state absorption, fluorescence, linear dichroism, circular dichroism anisotropic spectra. Time-resolved fluorescence two-dimensional electronic...
In a two-dimensional (2D) optical spectrum of multilevel system, there are diagonal peaks and off-diagonal cross-peaks that correlate the different levels. The time-dependent properties these contain much information about dynamics system. peakshape depends on spectral diffusion associated transition characterized by frequency-fluctuation correlation function (FFCF) is well studied. However, cross-peak provides between transitions less studied or understood. We derived third-order nonlinear...
A methodology based on time-resolved, phase-sensitive second harmonic generation (SHG) for probing the excited state dynamics of species at interfaces is presented. It an interference measurement between SHG from sample and a local oscillator generated reference together with lock-in to remove large constant offset interference. The technique characterized by measuring phase dye malachite green water/air interface. key attributes are that observed signal directly proportional concentration,...
Journal Article Accurate Removal of Implanted Gallium and Amorphous Damage from TEM Specimens after Focused Ion Beam (FIB) Preparation Get access P Nowakowski, Nowakowski E.A. Fischione Instruments, Inc., Export, PA 15632 USA Search for other works by this author on: Oxford Academic Google Scholar CS Bonifacio, Bonifacio MJ Campin, Campin ML Ray, Ray PE Microscopy Microanalysis, Volume 23, Issue S1, 1 July 2017, Pages 300–301, https://doi.org/10.1017/S1431927617002185 Published: 04 August 2017
A highly sensitive and selective probe for Vancomycin (Van) in aqueous serum samples is developed this study. The based on a triad consisting of near-infrared squaraine dye (Seta-640) conjugated to two anthraquinone molecules via Lys-d-Ala-d-Ala peptides. In the absence Van, close proximity efficient electron-transfer from excited Seta-640 result significant fluorescence quenching ("off"-state). When Van added, antibiotic bind with high affinity -d-Ala-d-Ala ligands 2:1 stoichiometry...
Multi-scale surface topography is critical to function, yet the very smallest scales are not accessible with conventional measurement techniques.Here we demonstrate two separate approaches for measuring small-scale in a transmission electron microscope (TEM).The first technique harnesses "conventional" methods preparation of TEM cross-section, and presents how these may be modified ensure preservation original surface.The second involves deposition material interest on pre-fabricated...
We use two-dimensional electronic spectroscopy to measure the ultrafast correlation dynamics between Qx and Qy transitions in chlorophyll molecules. derive a variation center line slope method quantify frequency fluctuation cross-correlation function, Cxy(Tw). Compared with function of transition, we observe that there is only minimal even at ultrashort timescale ∼100 fs, which then decays zero time scale ∼2 ps.
Journal Article Targeted Ion Milling of Ex Situ Lift-Out FIB Specimens Get access CS Bonifacio, Bonifacio E.A. Fischione Instruments Inc., Export, PA 15632 USA Search for other works by this author on: Oxford Academic Google Scholar MJ Campin, Campin P Nowakowski, Nowakowski M Boccabella, Boccabella LA Giannuzzi, Giannuzzi EXpressLO LLC, Lehigh Acres, FL 33971 PE Microscopy and Microanalysis, Volume 23, Issue S1, 1 July 2017, Pages 268–269, https://doi.org/10.1017/S1431927617002021...