A5088568800- Carbon Nanotubes in Composites
- Electrospun Nanofibers in Biomedical Applications
- Graphene research and applications
- Advanced Cellulose Research Studies
- Conducting polymers and applications
- Mechanical and Optical Resonators
- Supercapacitor Materials and Fabrication
- Electrohydrodynamics and Fluid Dynamics
- Advanced Sensor and Energy Harvesting Materials
- Transition Metal Oxide Nanomaterials
- Nanotechnology research and applications
- Advanced Battery Technologies Research
- Nanocomposite Films for Food Packaging
- Force Microscopy Techniques and Applications
- Proteoglycans and glycosaminoglycans research
- Advanced Battery Materials and Technologies
- Nanoparticles: synthesis and applications
- Advancements in Battery Materials
- Graphene and Nanomaterials Applications
- Flame retardant materials and properties
- Thermal Radiation and Cooling Technologies
- Polymer Nanocomposite Synthesis and Irradiation
- Neuroscience and Neural Engineering
- Biochemical and Structural Characterization
- Advanced ceramic materials synthesis
Rensselaer Polytechnic Institute
2010-2024
California State Polytechnic University
2018
PROTO Manufacturing (United States)
2018
Autonomous University of San Luis Potosí
2010-2015
Troy University
2014
We present a scalable and facile technique for noncovalent functionalization of graphene with 1-pyrenecarboxylic acid that exfoliates single-, few-, multilayered flakes into stable aqueous dispersions. The exfoliation mechanism is established using stringent control experiments detailed characterization steps. Using the exfoliated graphene, we demonstrate highly sensitive selective conductometric sensors (whose resistance rapidly changes >10,000% in saturated ethanol vapor), ultracapacitors...
Electrospinning of nanomaterial composites are gaining increased interest in the fabrication electronic components and devices. Performance improvement electrospun results from unique properties associated with nanometer-scaled features, high specific surface areas, light-weight designs. Electrospun nanofiber membrane-containing polymer electrolytes show improved ionic conductivity, electrochemical stability, low interfacial resistance, charge-discharge performance than those prepared...
We have created stable dispersions of single wall carbon nanotubes (SWNTs) in water by employing a noncovalent functionalization scheme that allows carboxylic acid moieties to be attached the SWNT surface pi-pi stacking interaction. Pyrenecarboxylic (PCA) is noncovalently SWNTs and affords highly uniform aqueous dispersions. This method was developed provide alternative commonly used oxidative treatment nanotubes. strategy avoids damage nanotube structure inherent treatments. Carbon are...
Heparins have been invaluable therapeutic anticoagulant polysaccharides for over a century, whether used as unfractionated heparin or low molecular weight (LMWH) derivatives. However, production by extraction from animal tissues presents multiple challenges, including the risk of adulteration, contamination, prion and viral impurities, limited supply, insecure supply chain, significant batch-to-batch variability. The use animal-derived also raises ethical religious concerns, well carries...
High-performance cellulose–halloysite hemostatic nanocomposite fibers (CHNFs) are fabricated using a one-step wet–wet electrospinning process and evaluated for human plasma coagulation by activated partial thromboplastin time. These novel biocompatible CHNFs exhibit 2.4 times faster time compared with the industry gold standard QuikClot Combat Gauze (QCG). The have superior antileaching property of clay 3 higher post-wetting clotting activity to QCG. also coagulate whole blood 1.3 than QCG...
Single-wall carbon nanotubes (SWNTs) are well dispersed in water using a polymer, polyvinylpyrrolidone (PVP), surfactant, sodium dodecyl benzene sulfonate (SDBS), and brief low-power sonication. The concentration of these pristine SWNT dispersions quite high, approaching 1 g/L, remain stable over several months. These suspensions can be used as printable conductive material were to create novel self-assembled arrays which highly aligned. Suspensions SWNTs enable their application aqueous...
Core−sheath multiwalled carbon nanotube (MWNT)−cellulose fibers of diameters from several hundreds nanometers to micrometers were prepared by coaxial electrospinning a nonvolatile, nonflammable ionic liquid (IL) solvent, 1-methyl-3-methylimidazolium acetate ([EMIM][Ac]). MWNTs dispersed in IL form gel solution. This core solution was electrospun surrounded sheath cellulose dissolved the same IL. Electrospun collected coagulation bath containing ethanol−water remove completely and dried...
This work outlines a newly developed method that allows electrospun cellulose fibers to be coated with nanoparticles during dry-jet wet electrospinning. Fibers Mg(OH)<sub>2</sub> exhibited flame retardant properties, whereas containing accelerated burning.
In this work, films of horizontally aligned single-walled carbon nanotubes were thermally and electrically characterized in order to determine the bolometric performance. An average thermal time constant τ = 420 μs along with a temperature coefficient resistance TCR −2.94% K–1 obtained. The maximum voltage responsivity detectivity obtained RV =230 V/W D* 1.22 × 108 cm Hz1/2/W, respectively. These values are higher than (150 V/W) (1.0% K–1) previously reported for nanotube at room...
Magnetically responsive heparin-immobilized cellulose nanofiber composites were synthesized by wet-wet electrospinning from a nonvolatile, room-temperature ionic liquid (RTIL), 1-methyl-3-methylimidazolium acetate ([EMIM][Ac]), into an aqueous coagulation bath. Superparamagnetic magnetite (Fe3O4) nanoparticles incorporated the fibers to enable manipulation of both dry and wet membranes with external magnetic field. Three synthetic routes developed prepare three distinct types nanocomposite...
Electrospun polymer fibers were prepared containing mixtures of different proportions ferromagnetic and superparamagnetic nanoparticles. The magnetic properties these then explored using a superconducting quantum interference device. Mixed superparamagnetic/ferromagnetic examined for mesoscale exchange coupling, which was not observed as theoretically predicted. This study includes some the highest nanoparticle loadings (up to 50 wt%) magnetization values (≈ 25 emu/g) in an electrospun fiber...
Natural cotton was dissolved in a room-temperature ionic liquid 1-ethyl-3-methyl acetate and wet-jet electrospun to obtain nanoscale fibers with substantially reduced diameter-and therefore an increased surface area-relative natural fibers. The resulting nano-cotton were esterified trityl-3-mercaptopropionic acid, which after selective de-tritylation afforded containing reactive thiol functionality. Silver nanoparticles that covalently attached these sulfhydryl groups assembled next....
Poly(glycerol sebacate) (PGS) has increasingly become a desirable biomaterial due to its elastic mechanical properties, biodegradability, and biocompatibility. Here, we report microfibrous core-shell mats of polycaprolactone (PCL)-PGS prepared using wet-wet coaxial electrospinning. The anticoagulant heparin was immobilized onto the surface these electrospun fiber mats, they were evaluated for their chemical, mechanical, biological properties. structure PCL-PGS provided tunable degradation...
Lignosulfonate was applied as both the donor of sulfur and acceptor for Li–S battery cathode material.
Single-walled carbon nanotubes (SWNTs) have shown interesting bolometric properties, making them good candidates for the detection of infrared and terahertz radiation. However, little has been reported on characteristics SWNT as a function their chirality or possible influence composite morphology these properties. The separation SWNTs based allows almost purely semiconductive metallic to be studied. current study focuses performance self-assembled films SWNTs. dependence properties was...
We report novel heparin–cellulose–charcoal composites prepared using room temperature ionic liquids (RTILs) to enhance the biocompatibility and blood compatibility of activated charcoal beads while decreasing size their active pores.
Flexible, well-dispersed and continuous 100-nm diameter cellulose fibers were prepared from an ionic liquid solvent by a novel dry-jet wet-electro spinning process. The ribbon formed chemically activated affinity dye, cibacron blue (CB) was immobilized at 0.22 g CB/g dry loading to the surface of these fibers. resulting matrix packed into chromatography column adsorption, desorption specificity this for bovine serum albumin (BSA) studied. These electrospun had BSA binding capacity 230 mg/g,...