Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
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…
Electroluminescence has been widely reported in large band gap insulating polymers under any kind of electrical stress, being ac, dc, impulse etc. but its significance is still the matter of debate. It was first investigated in the late seventies in divergent field experiments (i.e. using needle electrodes embedded in…
The evanescent wave enhancement of left-handed (LH) metamaterials (MTMs) have always been providing a great opportunity to establish useful refraction systems, which could be optimally utilized to a vast amount of engineering applications on the front burner. We proposed a specific MTM structure to realize and control…
La dualita elettromagnetica rappresenta una simmetria delle equazioni di Maxwell nel vuoto, ma non della lagrangiana che le genera. Si studiano modelli di Elettrodinamica generalizzata in cui la dinamica del campo elettromagnetico e non lineare e che in particolare preservano la simmetria di dualita. Si esaminano l’ap…
Here we propose a model to simulate the influence of atomistic properties of field emitters on the field emission current. As an example, we modeled the field emission from a zigzag-single walled carbon nanotube. By a modification in the self-energy in non-equilibrium Green's function formalism, we simulated the field…
We demonstrated the layer thickness effects of molybdenum-trioxide (MoO3) as buffer layer inserting at the interface between silver anode and organic material of a top-incident organic photovoltaic (OPV). The OPV structure contained active bilayer layers using 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) and ful…
We present the results of theoretical analysis of recent experimental data on excitations of the surface plasmon polariton in heavily-doped GaN epitaxial layers [1]. Spectra of the reflection coefficient, and their polarization dependencies were investigated in the frequency range of 2-20 THz including the Reststrahle…
A laser deposition system for the co-evaporation of organolead halide perovskite was developed. We successfully demonstrated that the difficulty in deposition control of CH3NH3I (MAI) was overcome by laser deposition, where the evaporation rate was finely adjusted by tuning the duty ratio of squarely modulated infrare…
Volcano-structured p-type silicon field emitter arrays have been fabricated by etch-back technique and investigated the photoresponse characteristics of electron emission excited by laser pulses. We have observed the current pulses from the device with the same response of the laser pulse.
A high photo-induced effective minority carrier lifetime τeffof crystalline silicon was achieved by simple heat treatment in liquid water. τeffwas 2.8×10-3s for 15-Ωcm n-type crystalline silicon heat treated in liquid water at 120°C for 1.5 h. The τefffor the sample treated at 90°C increased from 1.0×10-4s (just after…
We propose a fabrication method of gold nano-pillar structures with the aspect ratio up to ~38. The optical electric field enhancement of density and height controlled gold nano-pillar arrays were experimentally studied by ultrafast near infrared photoemission. Strongly polarization dependent multi-photon photoemissio…
Radiofrequency (RF) electron guns work by establishing an RF electromagnetic field inside a cavity having conducting walls. Electrons from a cathode are generated in the injector and immediately become accelerated by the RF electric field, and exit the gun as a series of electron bunches. Finding simple solutions for…
Polymer foams and polymer-film systems with internal cavities are highly compressible, at least in certain direction(s). Their Young's moduli can be several orders of magnitude lower than those of the respective non-porous (essentially cavity-free) materials. Thus, polymer foams and polymer systems with cavities easil…
Silicon photonics is being considered as the future photonic platform, mainly for the development of low power consumption photonic circuits. In this vision, several research groups are exploring Pockels effect in strained silicon. In this presentation, we present recent developments on strained silicon photonics taki…