Materials Literature
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Mineral filler is used for resin compounds, because it increases the stiffness and thermal stability of a resin compound, and it also cuts down the cost. Calcium carbonate, silica, magnesium oxide, and others are used as filler materials in general, and the type of filler material, the size, and content can affect the…
Phosphorus is typically a common dopant used in wafer manufacturing. Measuring of phosphorous in Si-wafer is always demanding and matrix interferences is always a problem in VPD ICPMS. It is reported here the measuring of phosphorus in VPD matrix using ICPMS.
Out-of-plane reconfigurable microcantilevers integrated into metamaterial unit cells is explored as a technological platform for the realization of advanced polarization control of THz waves. By varying the positioning of the microcantilever structures and isolating the control signals to these cantilevers, various de…
Atomically-thin materials such as single-walled carbon nanotubes and graphene are prone to chemical attack because all of the constituent atoms are exposed. Here we describe progress from our lab in the synthetic creation of a tube-in-a-tube (Tube^2) semiconductor and their first applications in the electrical detecti…
With the constant drive for higher performance and new functionality in modern electrical and optical devices, the need for growth and characterization in a practical, economical and controlled manner has become increasingly important. The intent of my proposed research is to help provide a vertically-integrated basis…
We demonstrated a blue phosphorescent organic light-emitting diode with the maximum current efficiency and power efficiency of 57.4 cd/A and 51.6 lm/W, respectively, based on trizaole derivatives as the host of the emitting layer.
This paper presents the designs of the monolithic square ring resonators based on the composite right/left-handed (CRLH) transmission line (TL) operated in left-handed slow-wave region. The proposed resonator is fully realized by only using CRLH cells, and its design equation is derived based on the left-handed guidin…
In this study, we investigated the stable and efficient quantum-dot light emitting diodes (QLEDs) under high driving current by using composition-gradient thick-shell CdSe@ZnS/ZnS QDs. Thick-shell QDs with low defective structure can effectively avoid the electron-hole pairs from nonradiative Auger recombination and p…
Reducing the size of device components, e.g. waveguides and resonant cavities, beyond the diffraction limit is a means to an end. Here we demonstrate the condition required to have air cavities within a uniaxial metamaterial clad waveguide. Our work reveals that air cavity sizes much smaller than the operating wavelen…
Oxyfluoride glasses, and more recently, glass ceramics, doped with trivalent rare earth ions (RE) have attracted much attention for near-infrared laser applications with the promise to combine the merits of fluorides (low phonon energy, moderate refractive indexes, extensive IR window) and oxides (high chemical and me…
Amorphous indium-gallium-zinc-oxide thin film transistor (a-IGZO TFT) with offset structure is fabricated for active-driving of ZnO nanowire field emitters. ZnO nanowire field emitters grown by thermal oxidation method is integrated with the a-IGZO TFT. The results proved that the growth process of ZnO nanowires is co…
Chiral metamaterials, where magnetoelectric coupling is orders of magnitude larger than that of natural chiral media, offer unique possibilities for the control and manipulation of the electromagnetic wave polarization. Such a control is particularly useful in the THz range, where natural materials do not show strong…
The effect of increasing temperature on the optical, spectroscopic and structural properties of phospho-silicate nano-composites thin films SPNCTF and monolith SPNCM were studied. Doping the mentioned prepared forms of sample with some rare earth oxide such as Neodymium (Nd3+), Erbium (Er3+), Holmium (Ho3+) etc… SPNCR…
Aqueous ammonia is used as the new additive to the H2O2-based etchant for back-channel-etch (BCE) amorphous Indium gallium zinc oxide (a-IGZO) thin-film transistors (TFTs) to pattern Mo source/drain. The Mo residue after being etched by H2O2:NH3·H2O is removed completely by adjusting the PH value to above 7. The BCE a…
The scaling down of thermionic emitters to the microscale is achieved by using microfabrication technologies and graphene working as the emitter. A graphene micro-emitters can be turned on by a voltage of several volts and its emission current exhibits a tunability of up to six orders by a modest gate. Importantly, em…
A theoretical model of a microwave diode structure was applied to the base of a silicon cathode with a diamond like coating (DLC) and non-resonant electron emission to study negative conductance of the structure in the framework of the small signal theory. The negative conductance results from delays of electron emiss…
We demonstrate a broadband spectrum absorber using random structures on refractory plasmonic material (Tungsten) resulting in the absorption efficiency over 90% in the wavelength range from 200 nm to 1100 nm. Numerical simulations for the structure with same parameters agree well with the experimental results. Random…
In this paper, a fuzzy approximator based adaptive dynamic surface control scheme is proposed for a class of unknown time delay nonlinear systems preceded by asymmetric hysteresis nonlinearities. The features of the proposed method are: (1) by combining the approximated property of the fuzzy logic systems (FLSs) with…
We report preliminary results of precision measurements of the graphene quantum Hall resistance plateau value with respect to magnetic field, temperature and applied current. Resistance value of SiC graphene Hall device was modulated by chemical doping, heating, and UV irradiation at the ambient condition. Precision m…
Regularly-patterned, multi-section GaN nanorod arrays with sidewall non-polar quantum wells are grown with the pulsed-growth technique to show much broader emission spectra. The discovered Ga-rich line-markers and the theoretical/numerical studies illustrate the growth mechanisms of such a multi-section nanorod struct…