A5084283661- Nanomaterials and Printing Technologies
- Advanced Sensor and Energy Harvesting Materials
- Fluid Dynamics and Thin Films
- Surface Modification and Superhydrophobicity
- Epoxy Resin Curing Processes
- Ferroelectric and Piezoelectric Materials
- Bone Tissue Engineering Materials
- Additive Manufacturing and 3D Printing Technologies
- Polymer Nanocomposites and Properties
- Nanofabrication and Lithography Techniques
- Advanced ceramic materials synthesis
- Mesoporous Materials and Catalysis
- Quantum Dots Synthesis And Properties
- Dental Implant Techniques and Outcomes
- Polymer crystallization and properties
- Material Properties and Processing
- Acoustic Wave Resonator Technologies
- Rheology and Fluid Dynamics Studies
- Conducting polymers and applications
- Synthesis and properties of polymers
- Silicone and Siloxane Chemistry
- Injection Molding Process and Properties
- Microwave Dielectric Ceramics Synthesis
- Aerogels and thermal insulation
- Advanced MEMS and NEMS Technologies
University of Minnesota
2015-2025
Twin Cities Orthopedics
2020-2024
University of Cambridge
2021
University of Minnesota System
1994-2020
Minneapolis Institute of Arts
2019
University of Westminster
2013
Material Sciences (United States)
2012
University of the West Indies
2009
American Ceramic Society
1991-2005
Kodak (United States)
2000
Thin zeolite films are attractive for a wide range of applications, including molecular sieve membranes, catalytic membrane reactors, permeation barriers, and low-dielectric-constant materials. Synthesis thin using high-aspect-ratio nanosheets is desirable because the packing processing advantages over isotropic nanoparticles. Attempts to obtain dispersed suspension via exfoliation their lamellar precursors have been hampered structure deterioration morphological damage (fragmentation,...
High-resolution screen printing of pristine graphene is introduced for the rapid fabrication conductive lines on flexible substrates. Well-defined silicon stencils and viscosity-controlled inks facilitate preparation high-quality patterns as narrow 40 μm. This strategy provides an efficient method to produce highly electrodes printed electronics. As a service our authors readers, this journal supporting information supplied by authors. Such materials are peer reviewed may be re-organized...
Aerosol jet printing requires control of a number process parameters, including the flow rate carrier gas that transports aerosol mist to substrate, sheath collimates into narrow beam, and speed stage substrate beneath beam. In this paper, influence parameters on geometry aerosol-jet-printed silver lines is studied with aim creating high-resolution conductive high current carrying capacity. A systematic study conditions revealed key parameter: ratio rate, defined here as focusing ratio. Line...
Gravure printing of graphene is demonstrated for the rapid production conductive patterns on flexible substrates. Development suitable inks and parameters enables fabrication with a resolution down to 30 μm. A mild annealing step yields lines high reliability uniformity, providing an efficient method integration into large-area printed electronics. As service our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be...
A zeolite membrane fabrication process combining 2D-zeolite nanosheet seeding and gel-free secondary growth is described. This produces selective molecular sieve films that are as thin 100 nm exhibit record high permeances for xylene- butane-isomers.
Graphene micro‐supercapacitors (MSCs) are an attractive energy storage technology for powering miniaturized portable electronics. Despite considerable advances in recent years, device fabrication typically requires conventional microfabrication techniques, limiting the translation to cost‐effective and high‐throughput production. To address this issue, we report here a self‐aligned printing process utilizing capillary action of liquid inks microfluidic channels realize scalable,...
▪ Abstract Piezoelectric materials have been integrated with silicon microelectromechanical systems (MEMS) in both microsensor and microactuator applications. Thin-film selection processing routes are reviewed. Some recent emerging applications of piezoelectric MEMS presented including acoustic emission microsensors, vibration monitors, molecular recognition biosensors, precision positioners, micropumps, linear stepper motors.
All-printed, foldable organic thin-film transistors are demonstrated on glassine paper with a combination of advanced materials and processing techniques. Glassine provides suitable surface for high-performance printing methods, while graphene electrodes an ion–gel gate dielectric enable robust stability over 100 folding cycles. Altogether, this study features practical platform low-cost, large-area, electronics. As service to our authors readers, journal supporting information supplied by...
Abstract Key microstructural properties of particulate coatings such as porosity and particle order are established during drying. Therefore, understanding the evolution distributions drying is useful for designing coating properties. Here, a 1D model proposed distribution through thickness at different times conditions, including Brownian diffusion, sedimentation, evaporation. Effects concentration on diffusion sedimentation rates included. Results condensed onto regime map which predicts...
Pristine graphene inks show great promise for flexible printed electronics due to their high electrical conductivity and robust mechanical, chemical, environmental stability. While traditional liquid-phase printing methods can produce patterns with a resolution of ∼30 μm, more precise techniques are required improved device performance integration density. A high-resolution transfer method is developed here capable conductive on plastic line width spacing as small 3.2 1 respectively. The...
Photocured polymers have recently gained tremendous interest for a wide range of applications especially industrial prototyping/additive manufacturing. This work aims to develop natural phenolic-based (meth)acrylates expand the use sustainable and mechanically robust 3D printable formulations.
Poly(lactide) (PLA), a compostable bioderived polyester, can be produced at cost and scale that makes it an attractive replacement for nondegradable petroleum-derived thermoplastics. However, pristine PLA is brittle unsuitable use in applications where high impact strength ductility are required. In this work we demonstrate poly(l-lactide) (PLLA) the glassy state toughened significantly via addition of amphiphilic diblock polymer. Notably, PLLA blend containing only 5 wt% poly(ethylene...
A three-dimensionally ordered macroporous (3DOM) bioactive glass with a composition of 80 mol % SiO2 and 20 CaO was synthesized by the sol−gel method using poly(methyl methacrylate) (PMMA) colloidal crystal templates. control sample matching prepared same process but without PMMA templating. In vitro hydroxycarbonate apatite growth investigated soaking in simulated body fluid (SBF) at temperature (37 °C) for varying lengths time. The formation layer on studied XRD, SEM, TEM, FTIR, ICP...
Ceramic nanoparticle/monodisperse latex coatings with a nanoparticle-rich surface and latex-rich body were created by depositing aqueous dispersions of monodisperse latex, approximately 550 nm in diameter, nanosized ceramic particles onto substrates drying. On the top dried coating, are closely packed nanoparticles uniformly occupying interstitial spaces, along cross section, fill spaces between near region; compacted structure, nearly devoid nanoparticles, lies beneath. Cryogenic scanning...
Highly crystalline exfoliated MFI‐nanosheets can pave the way for large‐scale deployment of sub‐500‐nm zeolite membranes due to their processing and packing advantages. Exfoliated prepared by melt compounding contain a large amount polymer unexfoliated particles which are detrimental fabrication ultrathin membranes. Complete removal polystyrene from nanosheet suspension in toluene is demonstrated centrifugation across chlorobenzene as confirmed thermogravimetric analysis (TGA) data...
A potentially low-cost approach for making copper zinc tin sulfide (CZTS) solar cells relies on annealing colloidal nanocrystal films cast suitable substrates in a sulfur-containing environment to form thin with micrometer-sized grains. The film microstructure and grain size affects the cell performance. We conducted systematic study of factors controlling crystal growth development during from dispersions CZTS nanocrystals. is controlled by concurrent normal abnormal growth. At 600 800 °C...
Binary composites formed by individually mixing exfoliated graphene oxide modified with amine-terminated poly(butadiene–acrylonitrile) (GA) and a spherical micelle forming poly(ethylene oxide)-b-poly(ethylene-alt-propylene) (OP) diblock copolymer thermoset epoxy, the associated GA/OP/epoxy ternary composites, were prepared studied as function of molecular weight Mc between cross-links. The rigid GA filler dispersed well in cured epoxies established transmission electron microscopy (TEM)....
Direct ink writing (DIW) offers a unique avenue for printing variety of soft materials into complex objects. However, rapid DIW elastomeric with control over the final printed shapes remains challenge. In this work, we present methodology commercial thermally curable polyurethane elastomer via UV-assisted (UV-DIW) through dual-cure approach. The hybrid resin consists photopolymerizable acrylate monomers shape fixation and to provide tailorable mechanical properties. By tuning composition...
The percolation thresholds of carbon black–polymer composites have been successfully lowered using particulate polymer starting materials (i.e., latex and water-dispersible powder). Composites prepared black (CB) commercial poly(vinyl acetate) (PVAc) exhibit a threshold near 2.5 vol % CB. This value is significantly lower than that comparable reference composite made from poly(N-vinylpyrrolidone) (PNVP) solution the same CB, which exhibits sharp rise in electrical conductivity 15 dramatic...