A5017621922- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Carbon and Quantum Dots Applications
- Nanocluster Synthesis and Applications
- Semiconductor Quantum Structures and Devices
- Molecular Junctions and Nanostructures
- Advanced battery technologies research
- Ammonia Synthesis and Nitrogen Reduction
- Metalloenzymes and iron-sulfur proteins
- Copper-based nanomaterials and applications
- Electrocatalysts for Energy Conversion
- Nanowire Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Electrochemical sensors and biosensors
University of Colorado Boulder
2025
Vanderbilt University
2018-2023
Nashville Oncology Associates
2020
Los Alamos National Laboratory
2017-2020
Oak Ridge National Laboratory
2020
Center for Integrated Nanotechnologies
2020
InP quantum dots (QDs) have great potential as emitters for solid-state lighting, lasing, and bioimaging without the inherent toxicity concern of Cd Pb-based emitters. Indium phosphide's small bandgap high covalency make it uniquely capable color-pure fluorescence that can be tuned throughout visible lower IR spectrum. Until recently, InP-based QDs consistently underperformed when compared with CdSe-based counterparts. Recent efforts to understand indium nonclassical growth mechanisms,...
Light-driven hydrogen generation from water is a route to carbon-neutral fuels. However, the integrated light absorbers and catalysts must be compatible functional under same conditions. A sulfate-functionalized complex, [Ni(H2O)(7-PPh2NArSO3)2](NaBF4), where PPh2NArSO3 = 4-(3,6-diphenyl-1,3,6-azadiphosphepan-1-yl)benzenesulfonate), was synthesized characterized. solid-state structure single-crystal X-ray crystallography also reported. The electrocatalytic activity for evolution of this...
The use of the varied chemical reactivity precursors to drive production a desired nanocrystal architecture has become common method grow thick-shell graded alloy quantum dots (QDs) with robust optical properties. Conclusions on their behavior assume ideal gradation and uniform particle composition. Here, advanced analytical electron microscopy (high-resolution scanning transmission coupled energy dispersive spectroscopy) is used confirm nature extent compositional these data are compared...
Thick-shell InP/ZnSe III-V/II-VI quantum dots (QDs) were synthesized with two distinct interfaces between the InP core and ZnSe shell: alloy core/shell. Despite sharing similar optical properties in spectral domain, these QD systems have differing amounts of indium incorporation shell as determined by high-resolution energy-dispersive x-ray spectroscopy scanning transmission electron microscopy. Ultrafast fluorescence upconversion was used to probe charge carrier dynamics shows substantial...
The physical structure of colloidal quantum dot (QD) nanostructures strongly influences their optical and electronic behavior. A fundamental understanding this interplay between function is crucial to fully tailor the performance QDs assemblies. Here, by directly correlating atomic chemical single CdSe-CdS dot-in-rods with time-resolved fluorescence measurements on same structures, we identify morphological irregularities at surfaces that moderate photoluminescence efficiencies. We find two...
Using a novel hydrothermal synthesis, nitrogen-doped carbon dots were synthesized and shown to exhibit tunable optical electrochemical properties.
Light-induced charge separation is at the very heart of many solar harvesting technologies. The reduction energetic barriers to and transfer increases rate overall efficiency these Here we report that internal reorganization energy redox acceptor, movement atoms with changing charge, has a profound effect on rates from donor quantum dots. We experimentally studied modelled Marcus Theory cobalt complexes have similar potentials covering 350 mV, but vastly different energies spanning 2 eV....
The incorporation of quantum dots in display technology has fueled a renewed interest InP-based dots, but difficulty controlling the Zn chemistry during shelling stymied thick, even ZnSe shell growth. characteristic uneven, lobed morphology Zn-based shells is difficult to assess qualitatively and measure through traditional methods. Here, we present methodological study utilizing quantitative morphological analysis InP/ZnSe analyze impact key parameters on InP core passivation epitaxy. We...
Abstract Light‐induced charge separation is at the very heart of many solar harvesting technologies. The reduction energetic barriers to and transfer increases rate overall efficiency these Here we report that internal reorganization energy redox acceptor, movement atoms with changing charge, has a profound effect on rates from donor quantum dots. We experimentally studied modelled Marcus Theory cobalt complexes have similar potentials covering 350 mV, but vastly different energies spanning...