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A novel lifting-off method of ZnO nanowires from Si substrate and embedded in flexible films have been proposed in this study. Compared with peeling-off method by polydimethyl- siloxane (PDMS), the embedded ZnO nanowires may suffer from external forces to change the dimension. The shape of ZnO nanowires remained almost unchanged after using the novel lifting-off process. Flexible films served as the...
The use of carbon nanotubes (CNTs) for electrical interconnections is hinder by the possibility of growing CNT directly onto metallization. The introduction of barrier layer between catalyst and metallization is thus essential to permit the direct growth of vertically aligned CNT bundles using CVD approaches. As a result, the resultant CNT bundle resistivity is not only a function of the densities...
We report the growth of rock-salt CrTe thin film on MgO substrate by molecular-beam epitaxy (MBE). Our high-resolution transmission electron microscopy (HRTEM) results show that a metastable rock-salt (RS) CrTe film can be achieved in a crystalline phase with thickness of 50 nm. The temperature dependence of remanent magnetization shows two ferromagnetic transition temperatures at 165 K and > 400...
In this work, thick textured carbon film (800nm) was grown on Si substrate using filtered cathode vacuum arc technique. Multi-cycle of deposition was performed to avoid the high film stress issue hence improve the film adhesion. Optical microscope was used for delamination check, the bonding composition was investigated using X-Ray photoelectron spectroscopy, and the microstructure of the film was...
We prpose Al-doped zinc oxide (AZO) grown on sapphire substrate using dual-plasma-enhanced metal-organic chemical vapor deposition (DPEMOCVD). The crystalline quality, optical properties, and electrical characteristics of AZO depend on the deposition temperature. The AZO thin film grown at 185 ºC shows the highest intensity of (002) preferent orientation for X-ray diffraction (XRD) pattern, highest...
Bi1−xPrxFe0.95Mn0.05O3 (BPFMO) thin films were successfully deposited on Pt(111)/Ti/SiO2/Si(100) substrates by spin coating with a sol-gel technology and rapid thermal annealing. The effects of Pr content on the microstructure, magnetic and multiferroic properties of thin films were investigated. The result of X-ray diffraction analysis shows that the BPFMO thin films have rhombohedral-to-tetragonal...
The hybrid carbon nanostructures composed of an array of vertically aligned carbon nanotubes (CNTs) and a self-organized planar graphite layer (PGL) located on the top of the array (CNT-PGL nanostructures) have been obtained by the CVD method with the volatile catalyst. The fundamental characteristics (morphology, elemental composition and structure) of these nanostructures were characterized by Scanning...
We demonstrate synthesis of large area graphene on a metal (Ni and Cu) foil by the thermal chemical vapor deposition (CVD) process using the solid camphor (C10H16O) as a carbon source. The graphene growth process on a polycrystalline metal foil significantly influence by the gas composition and quantity of solid precursor. Synthesis of high quality continuous graphene film is achieved in the developed...
This work presents a flexible carbon based memory with the Al/graphene oxide (GO)/ITO structure fabricated at room temperature. The Al/GO/ITO devices show the unipolar resistive switching behavior with the resistance ratio to over 30, and sustain over 250 cycling without any resistance window closure. However, the retention fails due to the resistance increase of low resistance state (LRS). The mechanisms...
Although great effort have been devoted for Si-based light generation and modulation technologies since the 1980s, monolithic growth of electrically pumped laser on Si remains the ‘holy grail’ for Si photonics. In this paper, room temperature lasing near the telecom wavelength of 1300 nm has been demonstrated at room temperature with low threshold current densities for InAs/GaAs quantum-dot lasers...
A dual-silicon-nanowires based nanoelectromechanical (NEMS) switch is fabricated using standard complementary metal-oxide-semiconductor (CMOS) compatible process. The switch comprises a capacitive paddle and two silicon nanowires both connect with the paddle, form a U-shape structure. The high electrostatic force generated from the large capacitive paddle and high flexible structure favor of silicon...
Well-defined Zn0.9Li0.1O nanorods were hydrothermally synthesized at the low temperature of 90°C on the sputtered ZnO seed layer in different thickness, 20 nm and 50 nm. The x-ray diffraction patterns of both samples with a single diffraction peak (002) showed the same wurtzite hexagonal structure. The length and diameter of the nanorods were both increased from 1.12 μm to 1.47 μm and 95 nm to 113...
Quantum dot light-emitting diodes (QD-LEDs) using InP/ZnSe/ZnS muitishell colloidal quantum dots (QDs) which were prepared by simple heating-up method were designed on polyethylene naphthalate (PEN) substrate for rugged optoelectronic device. The synthesized InP/ZnSe/ZnS multishell QDs exhibited an emission peak at 545 nm for clear green color with a full-width at half-maximum (FWHM) of 50 nm, and...
In this study, the Al-doped ZnO (AZO) nanorods were synthesized on silicon substrate by the hydrothermal process. The SiO2/silicon substrate was submerged horizontally in 0.06M mixture solution of zinc nitrate hexahydrate (Zn(NO3)2·6H2O), diethylenetriamine (DETA), and doped the solution of aluminium nitrate, nonahydrate (Al(NO3)3·9H2O) at about 90°C for 4h. It has been shown that the ZnO nanorods...
We report on the effects of post-annealing on ZnO nanorods array using optical second harmonic generation (SHG). The high-quality and nearly vertically aligned ZnO nanorod arrays were deposited on ZnO-seeded glass substrates by aqueous solution method. The SHG result indicated the transformation of oxygen deficiency on ZnO nanorods surface after post-annealing treatment process. The chemical composition...
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