The George Washington University

Powder Metallurgy Characterization of Thermoelectric Materials for Selective Laser Melting

Batista N., El Desouky A., Crandall J., Wang S., Yang J., LeBlanc S., The George Washington University, US

Thermoelectric materials are semiconductors capable of converting heat into electrical energy. Traditional manufacturing of thermoelectric devices involves machining and assembly steps which limit device geometries, result in material loss, and introduce parasitic thermal and electrical [...]

Inkjet printing of carbon nanospheres

Orrill M., Abele D., Banek N., Wagner M., LeBlanc S., The George Washington University, US

Proposed applications of drop-on-demand (DOD) inkjet printing extend beyond printing of text and graphics to include rapid manufacturing of thin electrical devices. The most commonly printed electronic materials are silver nanoparticles due to their potentially [...]

Functionality and degradation of 3D-printed polymeric scaffolds for mandibular reconstruction and vascularized bone tissue repair

Bulusu K.V., Holmes B., Paulson P., Zhang L.G., Plesniak M.W., The George Washington University, US

One of the greatest challenges in field of maxillofacial and craniofacial reconstruction is to quickly and adequately induce a vascular network within any large sections of repaired bone tissue. In this study we are addressing [...]

Mass Production of Graphene and Magnetic Nanoparticle in Arc Discharge Plasma and their Potential Biological Applications

Fang X., The George Washington University, US

Nowadays, mass production of high quality Graphene Platelet Networks (GPNs) and Magnetic Nanoparticles (MNs) are highly requested due to their wide range of applications such as flexible electronics, high-frequency transistors, energy storage, and biomedical applications. [...]

Electrospun Nanocomposite Nerve Guidance Conduits for Peripheral Neural Regeneration

Zhu W., Zhang L., The George Washington University, US

A novel tissue engineered scaffold was fabricated by electrospinning and electrospraying techniques, which possesses highly aligned poly-ε-caprolactone (PCL) microfibrous framework and adjustable neurotropic factor embedded poly (D, L-lactide-co-glycolide) (PLGA) nanospheres. Scanning electron microscope revealed the [...]

Three-Dimensional Bioprinted Biomimetic Nanocomposite Scaffolds for Osteochondral Regeneration

Castro N.J., Zhang L.G., The George Washington University, US

The current work focused on the manufacture of a three-dimensional biphasic nanocomposite scaffold for osteochondral regeneration. Extrusion-based 3D printing in combination with ultraviolet light induced photocrosslinking allowed for good integration of two disparate polymeric materials [...]

Enhanced Mechanical and Cytocompatibility Properties of Novel 3D Printed Osteochondral Scaffolds

Holmes B., Zhang LG., The George Washington University, US

A series of novel 3D osteochondral computer aided models were designed including a homogenous cross-hatched structure, a bi-phasic structure consisting of a cross hatched pattern and an intersecting rings structure, and a biphasic “key” model [...]

Enhancement of GaAs solar cell efficiency by type-II GaSb quantum dots located outside of the depletion region

Kechiantz A., Afanasev A., Lazzari J.-L., The George Washington University, US

Experiments have shown that extrinsic intermediate band (IB) states, for instance, formed by artificial quantum dots (QDs), located in the depletion region participate in electron-hole recombination. This facilitates dramatically the dark current and reduces the [...]

Enhancement of GaAs solar cell efficiency by type-II GaSb quantum dots located outside of the depletion region

Kechiantz A., Afanasev A., Lazzari J.-L., The George Washington University, US

Experiments have shown that extrinsic intermediate band (IB) states, for instance, formed by artificial quantum dots (QDs), located in the depletion region participate in electron-hole recombination. This facilitates dramatically the dark current and reduces the [...]

Biomimetic Biphasic Nanocomposite Scaffold for Osteochondral Regeneration

Castro N.J., O’Brien C., Zhang L.G., The George Washington University, US

The current work focused on the development and evaluation of a novel biomimetic biphasic nanocomposite scaffold for osteochondral interfacial tissue engineering. Tissue-specific growth factor-encapsulated nanospheres were manufactured via a wet electrospray technique and incorporated within [...]