A5101751109- Mesoporous Materials and Catalysis
- Iron oxide chemistry and applications
- Environmental remediation with nanomaterials
- Pickering emulsions and particle stabilization
- Nanoparticle-Based Drug Delivery
- Surfactants and Colloidal Systems
- Nanomaterials for catalytic reactions
- Quantum Dots Synthesis And Properties
- Lipid Membrane Structure and Behavior
- Polymer Surface Interaction Studies
- Advanced Polymer Synthesis and Characterization
- RNA Interference and Gene Delivery
- Magnetic properties of thin films
- Zeolite Catalysis and Synthesis
- Clay minerals and soil interactions
- Catalytic Processes in Materials Science
- Polymer Nanocomposites and Properties
- Adsorption and biosorption for pollutant removal
- Supramolecular Self-Assembly in Materials
- Gold and Silver Nanoparticles Synthesis and Applications
- TiO2 Photocatalysis and Solar Cells
- ZnO doping and properties
- Advanced Photocatalysis Techniques
- Photonic Crystals and Applications
- Chalcogenide Semiconductor Thin Films
Tulane University
2015-2024
Jiangsu Provincial Hospital of Traditional Chinese Medicine
2024
Jiangsu Provincial Academy of Traditional Chinese Medicine
2024
Jinan University
2019
University of New Orleans
2002-2017
University of Miami
2013
University of California, Los Angeles
2009
Rensselaer Polytechnic Institute
2008
University of Rhode Island
2002-2008
Chinese Academy of Sciences
2001-2006
High aspect ratio cadmium sulfide (CdS) quantum rods were synthesized at room temperature in the environment of water-in-oil microemulsions using a combination two surfactants: anionic bis(2-ethylhexyl) sulfosuccinate (AOT) and zwitterionic phospholipid l-α-phosphatidylcholine (lecithin). These highly acicular particles, obtained from microemulsion containing an equimolar mixture AOT lecithin, possess average width 4.1 nm ± 0.6 nm, with lengths ranging 50 to 150 nm. In contrast, conventional...
This research reports the use of organic-modified mesoporous silica particles as fillers to form organic/inorganic nanocomposites with improved thermal and mechanical properties. The particle were synthesized by co-assembly surfactant silicate species prepared hydrolysis condensation reactions tetraethoxysilane (TEOS) (3-trimethoxysilyl)propyl methacrylate (TMSPMA) through an aerosol process. Selective removal resulted in high surface areas covalently bound propyl ligands on pore indicated...
Naturally occurring halloysite clay nanotubes are effective in stabilizing oil-in-water emulsions and can serve as interfacially-active vehicles for delivering oil spill treating agents. Halloysite adsorb at the oil-water interface stabilize that stable months. Cryo-scanning electron microscopy (Cryo-SEM) imaging of shows these assemble a side-on orientation form networks on through end-to-end linkages. For application treatment marine spills, were successfully loaded with surfactants...
Magnetite nanoparticles in the size range of 3.2-7.5 nm were synthesized high yields under variable reaction conditions using high-temperature hydrolysis precursor iron(II) and iron(III) alkoxides diethylene glycol solution. The average sizes particles adjusted by changing temperature time a sequential growth technique. To obtain γ-iron(III) oxide same sizes, magnetite oxidized with dry oxygen at room temperature. products characterized DLS, TEM, X-ray powder diffractometry, TGA, chemical...
The stability of crude oil droplets formed by adding chemical dispersants can be considerably enhanced the use biopolymer, hydrophobically modified chitosan. Turbidimetric analyses show that emulsions in saline water prepared using a combination biopolymer and well-studied dispersant (Corexit 9500A) remain stable for extended periods comparison to stabilized alone. We hypothesize hydrophobic residues from polymer preferentially anchor droplets, thereby forming layer around droplets. is due...
Spherical silica particles containing nanoscale zerovalent iron were synthesized through an aerosol-assisted process. These are effective for groundwater remediation, with the environmentally benign serving as carriers nanoiron transport. Incorporation of into porous sub-micrometer protects ferromagnetic nanoparticles from aggregation and may increase their subsurface mobility. Additionally, presence surface silanol groups on allows control properties via modification using organic...
Nanoscale zerovalent iron particles (NZVI) are a preferred option for reductive dehalogenation of dense nonaqueous phase chlorinated hydrocarbons such as trichloroethylene (TCE) because their environmentally benign nature, high efficiency, and low cost. This study describes an approach to engineered containing NZVI that effective targeted delivery agents the remediation these compounds. The contain highly uniform carbon microspheres embedded with (Fe0/C composite particles). adsorptive keeps...
Interphotoreceptor retinoid-binding protein (IRBP) secreted by photoreceptors plays a pivotal role in photoreceptor survival with an unknown mechanism. A mutation the human IRBP has been linked to retinitis pigmentosa, progressive retinal degenerative disease. Mice lacking display severe early and degeneration. However, signaling pathway(s) leading death IRBP-deficient mice remains poorly understood. Here, we show that amounts of tumor necrosis factor-α (TNF-α) interphotoreceptor matrix...
This study examines the antitumor potential of curcumin and C6 ceramide (C6) against osteosarcoma (OS) cell lines when both are encapsulated in bilayer liposomal nanoparticles. Three formulations were prepared: liposomes, liposomes C6-curcumin liposomes. Curcumin combination with showed 1.5 times enhanced cytotoxic effect case MG-63 KHOS OS lines, comparison alone. Importantly, found to be less toxic on untransformed primary human cells (human mesenchymal stem cells) lines. In addition,...
A rapid and facile technique to synthesize nickel cobalt oxide electrodes by photothermal treatment of mixed organometallic precursor solution is reported. Using short intense pulses light from a xenon flash lamp, spray coated films are converted into porous with forest-like architecture. The electrode fabricated in few seconds show excellent energy storage properties as supercapacitor electrodes. Specific capacitance up 116 Fg-1 retention 75% were observed samples low mass loading. Analysis...
Spherical iron-carbon nanocomposites were developed through a facile aerosol-based process with sucrose and iron chloride as starting materials. These composites exhibit multiple functionalities relevant to the in situ remediation of chlorinated hydrocarbons such trichloroethylene (TCE). The distribution immobilization nanoparticles on surface carbon spheres prevents zerovalent nanoiron aggregation maintenance reactivity. microspheres allow adsorption TCE, thus removing dissolved TCE rapidly...
Polystyrene-coated ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ nanoparticles through surface engineering exhibit an intergranular tunneling magnetoresistance (MR) ratio of 22.8% at room temperature and a maximum MR 40.9% $110\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The drastic enhancement the clearly suggests that there is high degree spin polarization even for half metallic ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$. estimated $P$ about 54% 83% $110\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, respectively.
An efficient, productive, and low-cost aerosol-assisted self-assembly process has been developed to produce organically modified mesoporous silica particles via a direct co-condensation of silicate species organosilicates that contain nonhydrolyzable functional groups in the presence templating surfactant molecules. Different surfactants including cetyltrimethylammonium bromide, nonionic Brij-56, triblock copolymer P123 have used as structure-directing agents. The organosilanes this study...
Amphiphilic star polymers offer substantial promise for a range of drug delivery applications owing to their ability encapsulate guest molecules. One appealing but underexplored application is transdermal using block copolymer reverse micelles as an alternative the more common oral and intravenous routes. We prepared 6- 12-arm amphiphilic copolymers via atom transfer radical polymerization (ATRP) sequential blocks polar oligo (ethylene glycol)methacrylate nonpolar lauryl methacrylate from...
Mesoporous SiO2/TiO2/Fe2O3 particles containing macropores of about 50 nm in diameter have been prepared by an aerosol process using cetyltrimethylammonium bromide (CTAB) as a templating agent. In contrast to the traditional effect CTAB form ordered mesoporous silicas, morphology here is vastly different due presence precursor iron salts. The mesoporosity templated but additionally large voids leading combined macroporous and structure. explained through formation colloidal structures...
The carbonization of hydrophilic particle surfaces provides an effective route for tuning wettability in the preparation particle-stabilized emulsions. naturally occurring halloysite clay nanotubes (HNT) is successfully tuned by selective negatively charged external HNT surface. positively charge chitosan biopolymer binds to surface electrostatic attraction and hydrogen bonding, yielding carbonized (CHNT) on pyrolysis inert atmosphere. Relative native HNT, oil emulsification ability CHNT at...
The use of chemical dispersants is a well-established approach to oil spill remediation where surfactants in an appropriate solvent are contacted with the reduce oil-water interfacial tension and create small droplets capable being sustained water column. Dispersant formulations typically include organic solvents, minimize environmental impacts dispersant avoid surfactant wastage it beneficial water-based systems target interface. here involves tubular clay minerals known as halloysite...