A5019950257- Gold and Silver Nanoparticles Synthesis and Applications
- nanoparticles nucleation surface interactions
- Nanocluster Synthesis and Applications
- Electrocatalysts for Energy Conversion
- Nanomaterials for catalytic reactions
- Ammonia Synthesis and Nitrogen Reduction
- CO2 Reduction Techniques and Catalysts
- Quantum Dots Synthesis And Properties
- Molecular Junctions and Nanostructures
- Electrohydrodynamics and Fluid Dynamics
- Laser-Ablation Synthesis of Nanoparticles
- Electrochemical sensors and biosensors
- Metal complexes synthesis and properties
- Plasma Applications and Diagnostics
- Inorganic and Organometallic Chemistry
- Coagulation and Flocculation Studies
- Free Radicals and Antioxidants
- Catalytic Processes in Materials Science
Northwestern University
2019-2025
University of Wisconsin–Stevens Point
2015
Plasmas interacting with liquids enable the generation of a highly reactive interfacial liquid layer due to variety processes driven by plasma-produced electrons, ions, photons, and radicals. These show promise selective, efficient, green chemical transformations new material synthesis approaches. While many differences are be expected between conventional electrolysis plasma–liquid interactions, interactions can viewed, first approximation, as replacing metal electrode in an electrolytic...
Energetic species produced by gas-phase plasmas that impinge on a liquid surface can initiate physicochemical processes at the gas/liquid interface and in phase. The interaction of these energetic with phase chemical reaction pathways referred to as plasma-driven solution electrochemistry (PDSE). There are several processing opportunities challenges presented PDSE. These include potential use PDSE activate difficult other approaches well renewable electricity generate could make liquid-phase...
A fast gold nanoparticle synthesis without stabilizer in plasma–microdroplet interaction is identified.
Plasma-driven solution electrochemistry (PDSE) uses plasma-generated reactive species to drive redox reactions in solution. Nonthermal, atmospheric pressure plasmas, when irradiating water, produce many species. While PDSE is a promising chemical tool, there limited insight into the mechanisms of due variety short-lived reagents produced. In this study, we use aniline as model system for studying PDSE. We show that plasma irradiation aqueous solutions drives formation polyaniline oligomer,...
Bimetallic nanoparticles formed of poorly miscible alloys are attractive for applications in surface-enhanced Raman scattering (SERS), as they could allow the detection and study analytes that do not bind well to typical plasmonic substrates, particularly important biomolecules such serotonin. Despite their potential importance SERS applications, geometric properties these characterized. Here, we present a method calculating thermodynamically minimized geometries function surface, bulk,...
In plasma-driven solution electrolysis (PDSE), gas-phase plasma-produced species interact with an electrolytic to produce, for example, nanoparticles. An atmospheric pressure plasma jet (APPJ) directed onto a liquid containing metallic salt will promote reduction of ions in solution, generating clusters that nucleate form this article, results from computational investigation are discussed PDSE process which radio-frequency APPJ sustained helium impinges on silver nitrate resulting growth A...
Metal nanocluster growth pathways are challenging to study due the number of possible species involved and branching nature mechanisms. We present a data tree-based approach mapping these reaction based on structures energies obtained from Density Functional Theory (DFT) computations including positive, negative, neutral clusters in continuum solvent water. also develop genetic algorithm relative stability clusters, which we combine with tree method determine effects that favorable...
For several decades, silver nanoparticles have been grown from a solution of salts under electrode-free plasma conditions. Yet, details the atom-by-atom growth 1Ag+ to iAgmn+ (cluster m atoms with n charge) is not known. Here, we report theoretical calculations thermodynamically driven clusters up = 5 and 4 in water. These pathways are elucidated high quality DFT energies reaction formation continuum solvation model, all possible isomers for each cluster size considered. We find that (i)...