A5044910396- Carbon Nanotubes in Composites
- Conducting polymers and applications
- Molecular Junctions and Nanostructures
- Graphene research and applications
- Perovskite Materials and Applications
- 2D Materials and Applications
- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- Fullerene Chemistry and Applications
- Chalcogenide Semiconductor Thin Films
- Advanced Thermoelectric Materials and Devices
- Mechanical and Optical Resonators
- Power Systems Fault Detection
- Electrocatalysts for Energy Conversion
- Nanowire Synthesis and Applications
- Thermal properties of materials
- Fuel Cells and Related Materials
- Advancements in Battery Materials
- Hydrogen Storage and Materials
- Semiconductor Quantum Structures and Devices
- Machine Learning in Materials Science
- Photonic and Optical Devices
- Gas Sensing Nanomaterials and Sensors
- Silicon Nanostructures and Photoluminescence
- Thermal Radiation and Cooling Technologies
National Renewable Energy Laboratory
2016-2025
Stanford University
2024
United Kingdom Atomic Energy Authority
2022-2024
Culham Science Centre
2017-2024
Material Sciences (United States)
2014-2021
Royal Military Academy
2020
University of Washington Bothell
2017
University of North Florida
2012
University of Colorado Boulder
2002-2011
Assam University
2011
Utilizing Fe3O4 nanorods as the active Li+ storage material and 5 wt% carbon single-walled nanotubes (SWNTs) a "conductive net," Li-ion anode with high reversible capacity of 1000 mAh g−1 (∼2000 cm−3) at C rate is demonstrated. The electrodes exhibit high-rate capability stable capacities 800 5C ∼600 10C.
Single-walled-carbon-nanotube (SWNT) films are prepared with high transparency, electrical conductivity, and uniformity, exceptionally low surface roughness, on arbitrarily large substrates by ultrasonic spraying. This scalable process is ideally suited for large-area, solution-based production of SWNT electrodes photovoltaics other optoelectronic applications. Detailed facts importance to specialist readers published as "Supporting Information". Such documents peer-reviewed, but not...
Compared to imaging in the visible and near-infrared regions below 900 nm, second window (NIR-II, 1000-1700 nm) is a promising method for deep-tissue high-resolution optical vivo mainly owing reduced scattering of photons traversing through biological tissues. Herein, semiconducting single-walled carbon nanotubes with large diameters were used fluorescence long-wavelength NIR region (1500-1700 NIR-IIb). With this agent, 3-4 μm wide capillary blood vessels at depth about 3 mm could be...
We present a comprehensive study of the optical and electrical properties transparent conductive films made from precisely tuned ratios metallic semiconducting single-wall carbon nanotubes. The conductivity transparency SWNT are controlled by an interplay between localized delocalized carriers, as determined electronic structure, tube−tube junctions, intentional unintentional redox dopants. results suggest that main resistance in thin is associated with junctions. Redox dopants found to...
We modify the fundamental electronic properties of metallic (1T phase) nanosheets molybdenum disulfide (MoS2) through covalent chemical functionalization, and thereby directly influence kinetics hydrogen evolution reaction (HER), surface energetics, stability. Chemically exfoliated, MoS2 are functionalized with organic phenyl rings containing electron donating or withdrawing groups. find that most functional group (p-(CH3CH2)2NPh-MoS2) is efficient catalyst for HER in this series, initial...
The study of thermoelectric materials spans condensed matter physics, science and engineering, solid-state chemistry. diversity the participants inherent complexity topic mean that it is difficult, if not impossible, for a researcher to be fluent in all aspects field. This review, which grew out one-week summer school graduate students, aims provide an introduction practical guidance selected conceptual, synthetic, characterization approaches craft common umbrella language, theory,...
Here, we report a thorough study on the ability of fluorene-based semiconducting polymers to disperse large-diameter (average diameter ⟨d⟩ ≈ 1.3 nm) laser vaporization (LV) single-walled carbon nanotubes (SWCNTs). We demonstrate select purely species using poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(6,6'-{2,2'-bipyridine})] (PFO-BPy) and poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(9,10-anthracene)] (PFH-A), producing samples with narrow bright excitonic emission relative comparable aqueous...
Perovskites are processed from solution; understanding the influence of solution composition on crystallization and degradation is critical to their success.
Polymer-free semiconducting carbon nanotube networks demonstrate unprecedented equivalent n- and p-type thermoelectric performance.
We review the progress made towards, and challenges associated with, using 2D transition metal dichalcogenides, nitrides, carbides for (photo)catalytic transformation of CO 2 N into fuels value-added chemicals such as ammonia.
The emergent properties of chiral organic-inorganic hybrid materials offer opportunities in spin-dependent optoelectronic devices. One the most promising applications where spin, charge, and light are strongly coupled is circularly polarized (CPL) detection. However, performance state-of-the-art CPL detectors using metal halide semiconductors still limited by low anisotropy factor, poor conductivity, photoresponsivity. Here, we synthesize 0D copper chloride hybrids, templated...
Abstract The authors investigate how chiral ligands attached to perovskite nanocrystal (PNC) surfaces structurally distort the lattice. Chiral electro‐optical properties of resulting PNCs are demonstrated through fabrication a circularly polarized light (CPL) detector with discrimination up 14% between left‐ and right‐handed CPL. Both experimental electronic‐structure‐based simulations combined provide insights into interactions (both structural electronic) organic PNCs. major finding is...
Abstract Networks made of single‐walled carbon nanotubes (SWNTs) and metallic nanowire networks, graphene, ultra‐thin metal films have all been proposed as replacements for transparent conducting oxides (TCOs) in photovoltaic other applications. However, only limited comparisons nanostructured networks TCOs are available. Several common figures merit that often used to compare the electrical optical performance contacts evaluated here, merits each method comparison discussed. Calculating...
In this contribution we demonstrate the effective separation of single-wall carbon nanotube (SWCNT) species with diameters larger than 1 nm through multistage aqueous two-phase extraction (ATPE), including isolation at near-monochiral level up to least diameter range SWCNTs synthesized by electric arc synthesis (1.3-1.6 nm). We also that refined are readily obtained from both metallic and semiconducting subpopulations methodology is for multiple SWCNT raw materials. Using these data, report...
Capping perovskite absorber layers with semiconducting carbon nanotubes enables sub-picosecond hole extraction and recombination times of hundreds microseconds.
Abstract Materials with switchable absorption properties have been widely used for smart window applications to reduce energy consumption and enhance occupant comfort in buildings. In this work, we combine the benefits of windows conversion by producing a photovoltaic device absorber layer that dynamically responds sunlight. Upon illumination, photothermal heating switches layer—composed metal halide perovskite-methylamine complex—from transparent state (68% visible transmittance) an...
We report on the effects of replacing both In2O3:Sn (ITO) and hole transport layer (HTL) in organic photovoltaic (OPV) cells with single-walled carbon nanotube (SWNT) network transparent electrodes. have produced an OPV device without HTL exhibiting NREL-certified efficiency 2.65% a short-circuit current density 11.2 mA/cm2. Our results demonstrate that SWNT networks can be used to replace ITO efficient devices serves distinctly different roles ITO- SWNT-based devices.