A5054030443- Atmospheric chemistry and aerosols
- Coagulation and Flocculation Studies
- nanoparticles nucleation surface interactions
- Copper-based nanomaterials and applications
- Air Quality and Health Impacts
- Catalytic Processes in Materials Science
- Atmospheric and Environmental Gas Dynamics
- ZnO doping and properties
- Surface Roughness and Optical Measurements
- Electronic and Structural Properties of Oxides
- Advanced Photocatalysis Techniques
- Vehicle emissions and performance
- Atmospheric Ozone and Climate
- Nanoparticle-Based Drug Delivery
- Hydrocarbon exploration and reservoir analysis
- Particle Dynamics in Fluid Flows
- Advancements in Battery Materials
- Electron and X-Ray Spectroscopy Techniques
- Nanomaterials and Printing Technologies
- Near-Field Optical Microscopy
- Inhalation and Respiratory Drug Delivery
- Characterization and Applications of Magnetic Nanoparticles
- Iron oxide chemistry and applications
- Advanced Battery Technologies Research
- Gas Sensing Nanomaterials and Sensors
San Jose State University
2017-2024
Davidson College
2017-2020
Artificial Intelligence in Medicine (Canada)
2020
Bridge University
2020
Software (Spain)
2020
University of Maryland, College Park
2010-2019
Park University
2017
Dayalbagh Educational Institute
2009
Inter-University Accelerator Centre
2009
DEVCOM Army Research Laboratory
2008
Significance Lack of human data on influenza virus aerosol shedding fuels debate over the importance airborne transmission. We provide overwhelming evidence that humans generate infectious aerosols and quantitative to improve mathematical models transmission public health interventions. show sneezing is rare not important for—and coughing required for—influenza aerosolization. Our findings, upper lower airway infection are independent fine-particle exhaled reflect in lung, opened a pathway...
Abstract Silicon (Si) has been considered a very promising anode material for lithium ion batteries due to its high theoretical capacity. However, high‐capacity Si nanoparticles usually suffer from low electronic conductivity, large volume change, and severe aggregation problems during lithiation delithiation. In this paper, unique nanostructured with bonded wrapped by graphene is synthesized one‐step aerosol spraying of surface‐modified oxide suspension. The functional groups on the surface...
In order to enhance the utilization of inorganic nanoparticles in biological systems, it is important develop a fundamental understanding influence they have on cellular health and function. Experiments were conducted test silica, silica/iron oxide, gold for their effects growth activity Escherichia coli (E. coli). Transmission electron microscopy (TEM) dynamic light scattering (DLS) used characterize morphology quantify size distribution nanoparticles, respectively. TEM was also verify...
We report on the synthesis of highly monodisperse iron nanoparticles, using a chemical reduction method. Iron nanoparticles with an average diameter 6 nm and geometric standard deviation 1.3 were synthesized at pH 9.50 from ferric chloride precursor sodium borohydride as reducing agent, polyacrylic acid dispersing palladium ions seeds for nanoparticle nucleation. The resulting ferromagnetic 5 K superparamagnetic 350 K. agent (PAA) was shown to prevent possibly clusters aggregating; in...
Modifying the surfaces of magnetic nanoparticles (MNPs) by covalent attachment biomolecules will enable their implementation as contrast agents for resonance imaging or media magnetically assisted bioseparations. In this paper we report both surface coverage and activity IgG antibodies on MNPs. The were immobilized γ-Fe2O3 conventional methods using aminopropyltriethoxy silane subsequent activation glutaraldehyde. Novel fluorescence used to provide a quantitative evaluation well-known...
Li is known for its ability to increase the conductivity of CuO films. doped nanoparticles prepared by flame spray pyrolysis and followed spin coating film preparation were studied at dopant concentrations 0.5 %, 2 3.5 % 5 %. The photocurrent density photon-to-hydrogen conversion efficiency increased a factor five ten when introducing into CuO. This attributable in electrical almost two orders magnitude, i.e. from × 10−6 ∼ 4 S/cm 7 10−5 3 10−4 S/cm, thus lifetime photogenerated charge...
Three-dimensional (3D) structures such as nanowires, nanotubes, and nanorods have the potential to increase surface area, reduce light reflection, shorten charge carrier transport distances. The assembly of thus holds great promise for enhancing photoelectrochemical solar cell efficiency. In this study, genetically modified Tobacco mosaic virus (TMV1cys) was used form self-assembling 3D nanorod current collectors low light-reflecting surfaces. Photoactive CuO subsequently deposited by...
Abstract Urban areas are responsible for a substantial fraction of anthropogenic emissions greenhouse gases (GHGs) including methane (CH 4 ), with the second largest direct radiative forcing relative to carbon dioxide (CO 2 ). Quantification urban CH is important establishing GHG mitigation policies. Comparison observation‐based and inventory‐based suggests possible improvements in estimating source environments. In this study, we quantify from Baltimore‐Washington area based on mass balance...
Abstract Production of coal and natural gas is responsible for one third anthropogenic methane (CH 4 ) emissions in the United States. Here we examine CH from production southwestern Pennsylvania. Using a top‐down methodology combining measurements ethane, conclude that while Environmental Protection Agency inventories appear to report accurately, unconventional are underreported region by factor 5 (±3). However, production‐scaled Marcellus remain small compared other basins due its large...
CuO nanoparticles with diameter in the 20–30 nm range were prepared by a spinning disk reactor at rate of 16.9 kg/day based on process intensification concept. The intense environment, that is, vigorous mixing and fast reaction same time, created within an initially crystal-free liquid film moving over disk, generated very high supersaturation, consequently small fairly uniform crystals formed via precipitation. These spin coated sintered 450 °C for 1 h to form thin electrode use...
A Comprehensive Air-Quality Model with Extensions (CAMx) version 6.10 simulation was assessed through comparison data acquired during NASA's 2011 DISCOVER-AQ Maryland field campaign. Comparisons for the baseline (CB05 chemistry, EPA National Emissions Inventory) show a model overestimate of NOy by +86.2% and an underestimate HCHO -28.3%. We present new framework (CB6r2 MEGAN v2.1 biogenic emissions, 50% reduction in mobile NOx, enhanced representation isoprene nitrates) that better matches...
[1] Chemical transport models such as the Community Multiscale Air Quality (CMAQ) model provide useful guidance on air pollution control strategies. We evaluate performance of a 12 km resolution CMAQ simulation with surface and aircraft observations CO, O3, NOx during summer 2002. When all data are considered, average, modeled observed CO total column contents (surface to 3,000 m) agreed within 14% in morning 22% afternoon. Reducing deposition velocity for improves model-measurement...
Abstract Natural gas production in the United States has increased rapidly over past decade, along with concerns about methane (CH 4 ) fugitive emissions and its climate impacts. Quantification of CH from oil natural (O&NG) operations is important for establishing scientifically sound policies mitigating greenhouse gases. We use aircraft mass balance approach three flight experiments August September 2015 to estimate O&NG southwestern Marcellus Shale. a mean emission rate as 21.2...