Materials Literature
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Magnetricity- the magnetic equivalent of electricity- was recently verified experimentally for the first time. Indeed, just as the stream of electric charges produces electric current, emergent magnetic monopoles have been observed to roam freely (generating magnetic current) in geometrically frustrated magnets known…
We present a first-principles and tight-binding model study of silicane and germanane, the hydrogenated derivatives of two-dimensional silicene and germanene. We find that the materials are stable in freestanding form, analyse the orbital composition, and derive a tight-binding model using first-principles calculation…
This paper reports a one-step TiO2 seed-assistant hydrothermal synthesis of Mo-doped VO2(M)/TiO2 composite nanocrystals. It was found that excess Mo doping can promote formation of the VO2(M) phase, and rutile TiO2 seed is beneficial to morphology control, size reduction, and infrared modulation of Mo-doped VO2(M) nan…
Melting and reorganization of conformationally disordered crystals (α′‐phase) of poly( l ‐lactic acid) (PLLA) are analyzed as a function of the rate of heating in a wide range between about 10 −1 and 10 3 K s −1 . It is found for the first time that the reorganization of conformationally disordered α′‐crystals into st…
UNLABELLED: Chitosan coating plus different essential oils was developed and applied to fresh blueberries in order to find more natural treatments to preserve fresh fruit quality and safety during postharvest storage. Studies were 1st performed in vitro where wild-type Escherichia coli and Penicillium digitatum were g…
Zwitterionic sulfobetaine polymers with a catechol chain end (DOPA-PSB) were applied to a variety of hydrophobic polymer sheets and fibers. In addition, a silica surface was tested as a representative hydrophilic substrate. The polymer-coated surfaces showed significantly lower fouling levels than uncoated controls. B…
The redox chemistry and CO oxidation (2CO + O 2 → 2CO 2 ) activity of catalysts generated by the dispersion of CuO on CeO 2 nanorods were investigated using a multitechnique approach. Combined measurements of time-resolved X-ray absorption near-edge spectroscopy (XANES) and diffuse reflectance infrared Fourier transfo…
Single-walled carbon nanotubes and graphene hybrid films with complementary properties are combined for use in high-performance transparent electrodes and field-effect transistors (FETs). Based on the transfer characteristics for the hybrid film-based FETs, an improved Ion/Ioff and on-state current are achieved, compa…
Recent advances in atomically thin two-dimensional (2-D) materials have led to a variety of promising future technologies for post-CMOS nanoelectronics and energy generation. This review is an attempt to thoroughly illustrate the current status and future prospects for 2-D materials other than graphene (e.g., BN nanos…
The remarkable relationship between the size, shape, and optical properties of silver nanoparticles is proving to be very useful in a range of high performance applications. Considerable effort and investment are focused on delivering silver nanoparticles with precise morphologies. However, the reliability of these pa…
Graphene's unique optoelectronic properties have been exploited for many photonic applications. Here, we demonstrate a single graphene-based device that simultaneously provides efficient optical modulation and photodetection. The graphene device is integrated on a silicon waveguide and is tunable with a graphene gate…
Vanadium pentoxide–reduced graphene oxide (rGO) free‐standing electrodes are used as electrodes for supercapacitor applications, eliminating the need for current collectors or additives and reducing resistance (sheet resistance 29.1 Ω □ −1 ). The effective exfoliation of rGO allows improved electrolyte ions interactio…
Using a combination of Landau theoretical analysis and first-principles calculations, we establish a spontaneous symmetry breaking of the metallic state of the 1T monolayer of MoS2 that opens up a band gap and leads to an unexpected yet robust ferroelectricity with ordering of electric dipoles perpendicular to its pla…
Preparation of graphene from chemical reduction of graphene oxide (GO) is recognized as one of the most promising methods for large-scale and low-cost production of graphene-based materials. This study reports a new, green, and efficient reducing agent (caffeic acid/CA) for GO reduction. The CA-reduced GO (CA-rGO) sho…
Icosahedral symmetry is ubiquitous in nature, and understanding possible deformations of structures exhibiting it can be critical in determining fundamental properties. In this work we present a framework for generating and representing deformations of such structures while the icosahedral symmetry is preserved. This…
The realization of phase discontinuities across metasurfaces has led to a new class of reflection and refraction. Here we present theory and experiment on the discontinuous propagation of wavepackets across subwavelength-thickness meta-atoms. Using acoustic waves, we observe the process of wavepackets traversing a met…
The present research is focused on the manufacturing and analysis of the thermal and electrical properties of advanced ceramics from alumina (Al 2 O 3 ) with carbon nanofiller (CNF) from oil palm ash (OPA). The oil palm ash was used to produce carbon black nanofillers with a size of 50 to 100 nm via a ball milling pro…
A simple, scalable method is reported to fabricate ordered hetero-structures of organic materials using template-directed growth. The 3D extension of the structures is firstly determined by pre-pattern size and deposition amount, and can further be in situ tuned by annealing at appropriate temperature.
We have investigated the magnetoresistance (MR) in a series of Zn doped (p-type) GaAs nanowires implanted with different Mn concentrations. The nanowires with the lowest Mn concentration (∼0.0001%) exhibit a low resistance of a few kΩ at 300 K and a 4% positive MR at 1.6 K, which can be well described by invoking a sp…
In this paper, ordered arrays of various ZnO nanostructures were fabricated on both Si and p-GaN substrates via a hydrothermal process by the self-assembled nanosphere lithography (NSL). The morphology and orientation evolution of ZnO nanostructures were well-monitored by varying seed-layer-thickness, solution concent…