Materials Literature
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Single-walled carbon nanotubes (SWCNTs) have the potential to revolutionize many areas of opto-electronics, particularly thin-film photovoltaics and thermoelectrics due to their high carrier mobility and low-dimensional structure. Much effort has been devoted to increasing the thermoelectric power factor of SWCNTs by…
Supercapacitors are widely recognized as an important class of energy storage devices because they can provide a high specific power and long cycle life. Electrical double-layer capacitors (EDLCs) store charge and release electric energy through the transfer of ions to and from the electrode/electrolyte interface with…
The production of biorenewable chemicals has significantly evolved over the past years and numerous processes either have reached commercial stage or are close to commercialization.1 Recently, the biological synthesis of diacids has been receiving greater attention for the manufacture of green polyesters and polyamide…
Symmetrical Solid Oxide Fuel Cell Nano-Composite Cathodes (NCCs) were fabricated by infiltrating Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) precursor nitrate solutions containing glycine and Triton-X 100 into porous Ce0.9Gd0.1O1.95 (GDC) cathode scaffolds. X-ray diffraction indicated that in all cases the BSCF infiltrate was >90…
We report an efficient and simple method to synthesize tungsten oxide nanostructures, including high quality and quantity nanowires, through thermal evaporation of WO3 powders without catalyst. The thermal evaporation processing was conducted in a three zone horizontal tube furnace over temperatures ranging from 300 t…
GaN based power transistors have attracted intensive interest for highly efficient, high-frequency and high-temperature switching applications. Compared with GaN lateral devices, GaN based vertical devices can provide higher current density and higher breakdown voltage. In combination with low defect density offered b…
Electrical properties and morphology of orthorhombic β–WO3 nano-flakes with thickness of ~7-9 nm were investigated at the nanoscale using energy dispersive X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and current sensing force spectroscopy atomic force microscopy (CSFS-AFM, or PeakForce TUNATM). CSF…
Transition metal dichacogenides have layered structures in the bulk and exhibit various characteristics ranging from normal semiconductors to charge density waves (CDW) to magnetism. Current fabrication techniques have made it possible to extract a single composite monolayer in the laboratory and to measure the physic…
The isolation of graphene constituted a new paradigm in next generation electronic technologies. In this work, I will discuss recent works in graphene and beyond for novel device applications. This includes a focus on epitaxial graphene materials and device properties, as well as “beyond graphene” opportunities that c…
Abstract Here, average La0.6Sr0.4CoxFe1-xO3-δ (0≤x≤1) nano-particle sizes were controllably modulated from 48 to 24 nm by desiccating La0.6Sr0.4CoxFe1-xO3-δ (0≤x≤1) precursor nitrate solutions or infiltrating La0.6Sr0.4CoxFe1-xO3-δ (0≤x≤1) precursor nitrate solutions into Ce0.9Gd0.1O1.95 (GDC) scaffolds pre-infiltrate…
The depletion in fossil fuel reserve leads to the search for a clean, alternate fuel which can replenish the energy demand without causing greater harm to the environment. Hydrogen is one such kind of promising sustainable energy fuel which can be produced from very cheap resources like water. The major hurdle behind…
Motivated by the exceptional properties of graphene, other two-dimensional (2D) nanomaterials beyond graphene such as silicene have emerged with growing interest. Silicene is attractive for its exceptional characteristics and compatibility with silicon based nanoelectronics. It is believed that silicene may challenge…
Linear tetrapyrroles attracted interest of chemists and biochemists, due to the interesting optical properties, and biological importance both in photosynthesis and photoreceptor. In particular, the dynamic structural changes of linear tetrapyrroles such as cis-trans isomerization and coordination to various metal ion…
In order to avoid serious environmental and economic damages from energy use, humans must stop using fossil fuels altogether, as soon as possible. One possible strategy to cut the dependence of fossil fuels and, at the same time create a new economic force, is to develop a hydrogen based energy economy. A potentially…
Solid oxide fuel cell (SOFC) is energy conversion device which can converts chemical energy of hydrogen and oxygen to electrical energy. Conventional SOFC is fabricated by preparing anode support and coating electrolyte and cathode by spin coating or screen printing. One alternative way to fabricating SOFC is making p…
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Na0.5Bi0.5TiO3 (NBT) is a well-known lead-free piezoelectric material with potential to replace lead zirconate titanate (PZT),1 however high leakage conductivity for the material has been widely reported.2 Through a combination of Impedance Spectroscopy (IS), O2- ion transference (EMF) number experiments and O18 trace…
Oxygen reduction reaction (ORR) electrocatalysts with high activity, extended durability and lower cost are needed for proton exchange membrane fuel cells (PEMFCs). Compared with conventional nanoparticles, nanosheets composed of atomic-thin two-dimensional (2D) layers offer a higher relative concentration of catalyti…
Silicon-based electrode is a promising candidate in lithium-ion batteries (LIB) due to its significantly higher gravimetric capacity (3579 mAh g-1) in comparison to that of graphite (372 mAh g-1). However, during the process of lithiation/delithiation, the silicon material suffers from a huge volume change which has a…
Single-walled carbon nanotubes exhibit photostable near-infrared photoluminescence with excitation and emission energies that respond to fluctuations in the micro-environment. In the creation of robust nanotube-based optical sensors, it is desirable to identify shifts in excitation and emission of an ensemble nanotube…