A5102912401- Graphene research and applications
- Carbon Nanotubes in Composites
- Fullerene Chemistry and Applications
- Electrocatalysts for Energy Conversion
- Boron and Carbon Nanomaterials Research
- Advancements in Battery Materials
- Advanced battery technologies research
- Quantum Dots Synthesis And Properties
- Diamond and Carbon-based Materials Research
- Catalytic Processes in Materials Science
- Covalent Organic Framework Applications
- Organic Electronics and Photovoltaics
- Supercapacitor Materials and Fabrication
- Electrochemical Analysis and Applications
- Conducting polymers and applications
- Supramolecular Self-Assembly in Materials
- Fuel Cells and Related Materials
- Force Microscopy Techniques and Applications
- Electrochemical sensors and biosensors
- Nanotechnology research and applications
- Mesoporous Materials and Catalysis
- Advanced Electron Microscopy Techniques and Applications
- Perovskite Materials and Applications
- Nanomaterials for catalytic reactions
- Advanced Thermoelectric Materials and Devices
Umeå University
2012-2023
University of California, Berkeley
2015-2020
Lawrence Berkeley National Laboratory
2015-2020
Kavli Energy NanoScience Institute
2016-2020
Iran University of Science and Technology
2010
We report on a novel sensing platform for H2O2 and glucose based immobilization of palladium-helical carbon nanofiber (Pd-HCNF) hybrid nanostructures oxidase (GOx) with Nafion glassy electrode (GCE). HCNFs were synthesized by chemical vapor deposition process C60-supported Pd catalyst. Pd-HCNF nanocomposites prepared one-step reduction free method in dimethylformamide (DMF). The materials characterized transmission electron microscopy (TEM), X-ray diffraction (XRD), scanning (SEM), Raman...
We present a novel approach to prepare helical carbon nanofibers homogeneously functionalized with single crystal palladium nanoparticles via phase-transfer method. The materials were characterized by scanning electron microscopy (SEM), transmission (TEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS), energy-dispersive (EDX), thermogravimetric analysis (TGA) and electrochemical measurements. find that homogeneous small single-crystal Pd can be easily phenyl mercaptan,...
Nitrogen doping in carbon nanostructures has attracted interest for more than a decade, and recent implementation of such structures energy conversion systems boosted the even more. Despite numerous studies, structural conformation stability nitrogen functionalities small diameter single-walled nanotubes (SWNTs), impact these on electronic mechanical properties SWNTs, are incomplete. Here we report detailed study SWNTs with diameters range 0.8–1.0 nm, well-defined chirality. We show that...
We introduce a graphene-based nanofluidic cell that facilitates in situ imaging of liquid samples via transmission electron microscopy. The combines the benefits graphene cells—namely, high resolution, reduced charging effects, and excellent sample stability—with ability to reactants control fluid concentrations as provided by conventional silicon-nitride-windowed flow cells. offers significantly less window bowing compared existing commercial holders. demonstrate performance gold...
The development of easy and environmentally benign synthesis methods efficient electrocatalysts for use in energy conversion applications motivates researchers all over the world. Here we report a novel versatile method to synthesize well-dispersed palladium-functionalized ordered mesoporous carbons (Pd–OMCs) at room temperature without any reducing agent by one-pot mixing tri(dibenzylideneacetone)palladium(0) (Pd2DBA3) OMCs together common N,N-dimethylformamide (DMF) solution. formation Pd...
Many nanotechnological applications, using single-walled carbon nanotubes (SWNTs), are only possible with a uniform product. Thus, direct control over the product during chemical vapor deposition (CVD) growth of SWNT is desirable, and much effort has been made towards ultimate goal chirality-controlled SWNTs. We have used density functional theory (DFT) to compute stability fragments all chiralities in series representing targeted products for such which we compare actual CVD from properly...
Flexible and high-aspect-ratio C(60) nanorods are synthesized using a liquid-liquid interfacial precipitation process. As-grown shown to exhibit hexagonal close-packed single-crystal structure, with m-dichlorobenzene solvent molecules incorporated into the crystalline structure in C(60):m-dichlorobenzene ratio of 3:2. An annealing step at 200 °C transforms solvent-free face-centred-cubic polycrystalline structure. The deposited onto field-effect transistor structures two solvent-based...
We report on a dip-coating method to prepare catalyst particles (mixture of iron and cobalt) with controlled diameter distribution silicon wafer substrates by changing the solution's concentration withdrawal velocity. The size prepared were analyzed atomic force microscopy. Carbon nanotubes grown chemical vapor deposition particles. By decreasing particle below 10 nm, growth carbon can be tuned from few-walled nanotubes, homogeneous diameter, highly pure single-walled nanotubes. Analysis...
We examine a variant of so-called carbon nanotube peapods by packing C60 molecules inside the open edge ducts collapsed nanotubes. insertion is accomplished through facile single-step solution-based process. Theoretical modeling used to evaluate favorable low-energy structural configurations. Overfilling tubes allows infiltration over full cross-section and consequent partial or complete reinflation, yielding few-wall, large diameter cylindrical nanotubes packed with crystalline solid cores.
We demonstrate an inflatable nanoballoon actuator based on geometrical transitions between the inflated (cylindrical) and collapsed (flattened) forms of a carbon nanotube. In situ transmission electron microscopy experiments employing nanoelectromechanical manipulator show that nanotube can be reinflated by electrically charging nanotube, thus realizing electrostatically driven actuator. find tube reliably cycled with only modest control voltages (few volts) no apparent wear or fatigue. A...
A modified liquid–liquid interface precipitation synthesis of C 60 nanorods, effects and opportunities following an in situ photochemical transformation the liquid state, electronic characterization using a field‐effect transistor (FET) geometry are reported. The nanorods feature high aspect ratio ≈10 3 notably small average diameter 172 nm. Interestingly, it is found that decreased nanorod appears to correlate with distinctly improved properties, electron mobility 0.30 cm 2 V −1 s , as...
One-dimensional (1D) zigzag [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) nanoribbons are produced by folding two-dimensional ultrathin PCBM nanosheets in a simple solvent process. The unique 1D nanostructures exhibit uniform width of 3.8 ± 0.3 nm, equivalent to four molecules, and lengths 20–400 nm. These show well-defined crystalline structure, comprising molecules hexagonal arrangement without trapped molecules. First-principle calculations detailed experimental characterization...
We report on bottom‐up synthesis of graphene nanoribbons inside boron nitride nanotubes, using coronene molecules as building blocks. The synthesized ribbons are one or two wide, depending the diameter host nanotube. encapsulated carbon nanostructures can be eliminated from inner cavity filled nanotube via oxidation without any damage to structure.
We report on the self-assembly of semicrystalline [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) nanosheets at interface between a hydrophobic solvent and water, utilize this opportunity for realization electronically active organic/organic molecular heterostructures. The self-assembled PCBM can feature lateral size >1 cm2 be transferred from water surface to both hydrophilic surfaces using facile transfer techniques. employ single nanosheet as material in field-effect transistor (FET)...
C60 nanorods with hexagonal cross sections are grown using a static liquid–liquid interfacial precipitation method in system of C60/m-dichlorobenzene solution and ethanol. Adding water to the ethanol phase leads instead tubes where both length diameter can be controlled by content Based on our observations we find that rods/tubes strongly depends nucleation step. We propose liquid-liquid interface growth model rods based diffusion rate good containing solvent into poor as well size crystal...
We show how structurally ordered L10 face-centered tetragonal FePt nanoparticles are produced by a solid-state microwave-assisted synthesis method. The structural phase as well the incorporated Fe into is confirmed X-ray diffraction and high-resolution high-angle annular dark field scanning transmission electron microscopy experiments. prepared particles exhibit remarkable resilience toward crystallite growth at high temperatures. Directly correlated to phase, best oxygen reduction reaction...