A5110026050- Electrocatalysts for Energy Conversion
- Microstructure and mechanical properties
- Aluminum Alloy Microstructure Properties
- Electron and X-Ray Spectroscopy Techniques
- Advanced Materials Characterization Techniques
- Catalytic Processes in Materials Science
- Aluminum Alloys Composites Properties
- Fuel Cells and Related Materials
- Advanced Electron Microscopy Techniques and Applications
- Metal and Thin Film Mechanics
- Ion-surface interactions and analysis
- Advanced battery technologies research
- nanoparticles nucleation surface interactions
- Force Microscopy Techniques and Applications
- Semiconductor materials and devices
- Silicon Carbide Semiconductor Technologies
- Electrochemical Analysis and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Concrete and Cement Materials Research
- Surface and Thin Film Phenomena
- Catalysis and Oxidation Reactions
- Nanowire Synthesis and Applications
- Metallic Glasses and Amorphous Alloys
- Semiconductor materials and interfaces
- Copper Interconnects and Reliability
Lawrence Berkeley National Laboratory
2007-2024
University of Belgrade
2012-2024
Serbian Academy of Sciences and Arts
2015-2024
University of California, Berkeley
2005-2018
Friedrich-Alexander-Universität Erlangen-Nürnberg
2015
Los Alamos National Laboratory
2008
University of Minnesota
2004
University of Pittsburgh
2000
We present a novel method for synthesizing graphene sheets in the gas phase using substrate-free, atmospheric-pressure microwave plasma reactor. Graphene were synthesized by passing liquid ethanol droplets into an argon plasma. The characterized transmission electron microscopy, energy loss spectroscopy, Raman and diffraction. prove that can be created without three-dimensional materials or substrates demonstrate possible avenue to large-scale synthesis of graphene.
The manipulation of the bandgap graphene by various means has stirred great interest for potential applications. Here we show that treatment with xenon difluoride produces a partially fluorinated (fluorographene) covalent C−F bonding and local sp3-carbon hybridization. material was characterized Fourier transform infrared spectroscopy, Raman electron energy loss photoluminescence near edge X-ray absorption spectroscopy. These results confirm structural features fluorographane 3.8 eV, close...
The ability of electron microscopes to analyze all the atoms in individual nanostructures is limited by lens aberrations. However, recent advances aberration-correcting optics have led greatly enhanced instrument performance and new techniques microscopy. development an ultrastable microscope with a monochromated high-brightness source has significantly improved resolution contrast. In present work, we report information transfer beyond 50 pm show images single gold signal-to-noise ratio as...
We have fabricated fully released nano-electro-mechanical system (NEMS) cantilevers of various geometries from metallic alloy nanocomposite films. At thicknesses 4.3 and 20.0 nm, these are the thinnest metal reported in literature to date. Such device dimensions very difficult achieve using conventional were able overcome this limitation by room-temperature co-sputtering synthesize films Al–Mo. A systematic investigation microstructure properties as a function Mo content resulted an optimum...
Direct imaging of surface molecules and the interfaces between soft hard materials on functionalized nanoparticles is a great challenge using modern microscopy techniques. We show that graphene, single atomic layer sp2-bonded carbon atoms, can be employed as an ultrathin support film enables direct molecular layers in both conventional atomic-resolution transmission electron microscopy. An study capping citrate-stabilized gold used to demonstrate this novel capability. Our findings reveal...
Efficient, fully-printed organic tandem solar cells are realized by introducing solution-processed silver nanowires and opaque as charge collecting electrodes.
The controllable synthesis of rutile TiO2 single crystal particles with the preferential orientation {111} facets still remains a scientific and technological challenge. Here, we developed facile route for fabrication nanorod crystals (RTiO2NRs) having high ratios oxidative to reductive {110} surfaces. RTiO2NRs were synthesized using peroxo-titanium complex (PTC) approach, which was controlled by changing Ti/H2O2 ratio. thus obtained revealed tendency agglomerate through...
The tensile fractures of ultrafine-grained (UFG) Al-Mg alloy with a bimodal grain size were investigated at the micro- and macroscale using transmission electron microscopy (TEM), scanning (SEM) equipped focused ion beam (FIB), optical microscopy. nanoscale voids crack behaviors near fracture surfaces revealed in various scale ranges provided evidence to determine underlying deformation mechanisms associated bulk metals. structures exhibit unusual similar ductile-phase toughening brittle...
Nanoparticulate catalysts infiltrated into solid oxide fuel cell (SOFC) electrodes can significantly enhance performance, but the stability of these has been an open issue. An infiltration procedure is reported that leads to stable scandia-stabilized zirconia (SSZ) cathode electrode performance. SSZ cathode, with lanthanum-strontium manganate electro-catalyst particles, shown be voltage-stable for over operation at , a controlled current density . This demonstrates potential viability...
Summary For many rocks of high economic interest such as chalk, diatomite, shale, tight gas sands, or coal, a submicron-scale resolution is needed to resolve the 3D pore structure, which controls flow and trapping fluids in rocks. Such cannot be achieved with existing tomographic technologies. A new imaging method based on serial sectioning, uses focused-ion-beam (FIB) technology, has been developed. FIB technology allows for milling layers thin 10 nm by using accelerated gallium (Ga+) ions...
We report that the substrate-free gas-phase graphene synthesis method produces clean and highly ordered sheets are similar in quality to obtained through mechanical exfoliation of oriented pyrolytic graphite.
The multi-junction concept is the most relevant approach to overcome Shockley-Queisser limit for single-junction photovoltaic cells. record efficiencies of several types solar technologies are held by series-connected tandem configurations. However, stringent current-matching criterion presents primarily a material challenge and permanently requires developing processing novel semiconductors with desired bandgaps thicknesses. Here we report generic alleviate this limitation. By integrating...
In this manuscript a survey of the contemporary research related to platinum nanocatalysts on metal oxide based supports for low temperature fuel cell applications is presented.