A5027405483- Membrane Separation Technologies
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- TiO2 Photocatalysis and Solar Cells
- Membrane-based Ion Separation Techniques
- Solar-Powered Water Purification Methods
- Advanced Photocatalysis Techniques
- Polymer Surface Interaction Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Membrane Separation and Gas Transport
- Surface Modification and Superhydrophobicity
- Supercapacitor Materials and Fabrication
- Covalent Organic Framework Applications
- Electrocatalysts for Energy Conversion
- Electrochemical sensors and biosensors
- Quantum Dots Synthesis And Properties
- Pickering emulsions and particle stabilization
- Advanced Memory and Neural Computing
- Graphene and Nanomaterials Applications
- Fuel Cells and Related Materials
- Electrospun Nanofibers in Biomedical Applications
- Ionic liquids properties and applications
- Nanoparticles: synthesis and applications
- Laser Material Processing Techniques
- Laser-Ablation Synthesis of Nanoparticles
University of Nebraska–Lincoln
2017-2024
University of Lincoln
2022
Yale University
2014-2017
Interface (United States)
2015-2016
University of New Haven
2014-2015
Drexel University
2009-2015
Sharif University of Technology
2008-2010
Graphene oxide (GO) is a promising material for the development of antimicrobial surfaces due to its contact-based activity. However, relationship between GO physicochemical properties and activity has yet be elucidated. In this study, we investigated size-dependency using Gram-negative bacteria Escherichia coli. suspensions average sheet area ranging from 0.01 0.65 μm2 were produced their evaluated in cell or as model surface coating. The coatings increased 4-fold when decreased μm2. higher...
In this work, we fabricate an omniphobic microporous membrane for distillation (MD) by modifying a hydrophilic glass fiber with silica nanoparticles followed surface fluorination and polymer coating. The modified exhibits anti-wetting property not only against water but also low tension organic solvents that easily wet hydrophobic polytetrafluoroethylene (PTFE) is commonly used in MD applications. By comparing the performance of PTFE membranes direct contact experiments presence surfactant...
There is long-standing interest in developing membranes possessing uniform pores with dimensions the range of 1 nm and physical continuity macroscopic transport direction to meet needs challenging small molecule ionic separations. Here we report facile, scalabe fabrication polymer vertically (i.e., along through-plane direction) aligned by magnetic-field alignment subsequent cross-linking a liquid crystalline mesophase. We utilize wedge-shaped amphiphilic species as building block...
In a single step polymerization and coating, oxidative chemical vapor deposition (oCVD) has been used to synthesize unsubstituted polythiophene. Coatings have conformally coated within porous nanostructures of anodized aluminum oxide, titanium dioxide, activated carbon. Significant enhancement in charge capacity found with ultrathin polythiophene coatings that preserve the surface area pore space nanostructures. Pseudocapacitors consisting carbon yielded increases 50 250% specific volumetric...
Membrane separations are critically important in areas ranging from health care and analytical chemistry to bioprocessing water purification. An ideal nanoporous membrane would consist of a thin film with physically continuous vertically aligned nanopores display narrow distribution pore sizes. However, the current state art departs considerably this is beset by intrinsic trade-offs between permeability selectivity. We demonstrate an effective scalable method fabricate polymer films...
Desalination of oil-contaminated saline water using membrane distillation requires hydrophobic membranes with underwater superoleophobic surfaces. For designing such membranes, the chemistry and morphology interfacial domains in contact contaminated need to be adjusted that a stable layer, adhering surface, prevents oil droplets from wetting membrane. In this article, we present an approach relies on controlled functionalization surface polyvinylidene fluoride (PVDF) membranes; adjust...
Thin-film oxide heterostructures show great potential for use in spintronic memories, where electronic charge and spin are coupled to transport information. Here we a La0.7Sr0.3MnO3 (LSMO)/PbZr0.2Ti0.8O3 (PZT) model system explore how local variations magnetic phases mediate this coupling. We present direct, measurements of valence, ferroelectric polarization magnetization, from which map the at LSMO/PZT interface. combine these experimental results with structure calculations elucidate...
Electrochemical devices such as fuel cells, electrolyzers, lithium–air batteries, and pseudocapacitors are expected to play a major role in energy conversion/storage the near future. Here, it is demonstrated how desirable bulk metallic glass compositions can be obtained using combinatorial approach shown that these alloys serve platform technology for wide variety of electrochemical applications through several surface modification techniques. As service our authors readers, this journal...
A single-step method is introduced to generate microcapsules with 1–2 μm thick shells and tunable mechanical properties based on polyelectrolyte complexation across a water/oil droplet interface.
Synthesis and processing of two- or three-dimensional covalent organic frameworks (COFs) have been limited by solvent intractability sluggish condensation kinetics. Here, we report on the electrochemical deposition poly(5,10,15,20-tetrakis(4-aminophenyl)porphyrin)-covalent (POR-COFs) via formation phenazine linkages. By adjusting synthetic parameters, demonstrate rapid bottom-up synthesis COF dendrites. Both experiment density functional theory underline prominent role pyridine, not only as...
The dye sensitized solar cell (DSSC) operation depends on a liquid electrolyte. To achieve better performance, the should be replaced with solid or gel electrolyte, e.g., polymers. Here, we demonstrate initiated chemical vapor deposition as an effective liquid-free means for in situ polymerization and pore filling. We complete filling of 12 μm thick titania resulting enhanced performance that is attributed to reduced charge recombination at electrolyte−electrode interface.
Magnetoelectric oxide heterostructures are proposed active layers for spintronic memory and logic devices, where information is conveyed through spin transport in the solid state. Incomplete theories of coupling between local strain, charge, magnetic order have limited their deployment into new communication technologies. In this study, we report direct, measurements strain- charge-mediated magnetization changes La0.7Sr0.3MnO3/PbZr0.2Ti0.8O3 system using spatially resolved characterization...
Despite having exceptional electroactive properties, applications of unsubstituted polythiophene (PTh) have been limited due to its insolubility. To overcome this challenge, we employed oxidative chemical vapor deposition (oCVD) as a unique liquid-free technique enable the polymerization PTh using thiophene starting monomer and vanadium oxytrichloride an effective vaporizable oxidant initiator. Vibrational phototelectron spectroscopy indicated formation polythiophene. Cyclic voltammetry...
Polymer from 3,4-ethylenedioxythiophene (EDOT) was synthesized using oxidative chemical vapor deposition (oCVD). To enable the synthesis of PEDOT, two different oxidants, antimony pentachloride (SbCl5) and vanadium oxytrichloride (VOCl3), were utilized. The effect temperature on polymer electroactivity conductivity evaluated by measuring overpotential for oxygen reduction reaction film electrical conductivity, respectively. PEDOT films with values ∼2000 S/cm deposited in a single step...