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We report the design, analysis, and simulation of the superresolution nanolithography technique based on PDMS soft mold, which obtained the feature size smaller than 1/10 operating wavelength. The proposed nanolithography system consist of a periodic PDMS soft transparent mold, a thin silver layer, photoresist and substrate. The reason why we employ the PDMS soft mold is it can contact perfectly with...
In this paper, the HL7702 cells were cured with 4% paraformaldehyde for different time durations. The atomic force microscope (AFM) and atomic force acoustic microscope (AFAM) were used to observe the surface and subsurface properties of the cured cells. The structures of the cells were changed with the curing time including the cytoskeleton, the shape, the height and the roughness of the cells. The...
This article describes a promising technique to fabricate individual solid-state nanopores directly on dielectric membranes by using adjustable pulses controlled dielectric breakdown in electrolyte. The pulse parameters are adjustable with the running of fabrication process, which is suitable for various thickness and material of the membrane and control precision with sub-nanometer. Moreover, double-stranded...
A rapid, nondestructive and high-through quality characterization of large-area graphene films is presented based on the Terahertz (THz) time-domain spectroscopy technology. Sheet conductance of graphene films was obtained from the THz transmission measurement and the data analysis was based on the Fresnel coefficient and the Tinkham film equation. In comparison to the traditional four-point probes...
Sol-gel-derived superhydrophobic titanium dioxide(TiO2) thin film on glass was fabricated by using the flame soot layer as a template. After the calcination and the modification of 1,1,1,3,3,3-hexamethyl disilazane, the surface shows a perfect sticky superhydrophobic state with high adhesive force and a water contact angle of 160°as so called “Petal Effect”. The micro/nano-structures of the surface...
The shape memory effect (SME) in alloys with thermoelastic martensitic transformation provides a unique possibility to create the tiny mechanical devices for NEMS / MEMS technology. SME observed in layered composite microstructors produced by FIB CVD technology, consisting of Ti2NiCu alloy layer with SME and platinum elastic layer at reducing the thickness of the active layer for at least 80 nm. In...
Based on the Surface Plasmon Polaritons (SPPs), a 3-D periodic funnel-shaped nanopores array is proposed to enhance the optical transmission efficiency of sub-wavelength nanopores. For comparison, three types of structure with nanopores arrays are simulated by FDTD. The results have shown that the funnel-shaped nanopores array has the higher transmission efficiency than cylindrical nanopores array.
Well-aligned hexagonal GaN pyramids on the top of GaN nanocolumn arrays have been achieved successfully by the two-step method. Fistly, the well-aligned nanocolumn arrays are fabricated by UV-curing nanoimprint lithography. Next, the GaN pyramids are regrown on the top of GaN nanocolumn arrays by RF-plasma assisted molecular beam epitaxy. The as-grown GaN nanostructures are characterized by the in-situ...
Development of novel high added value cellulose products requires improved understanding of interaction forces, which includes also the adhesion force, between cellulose surfaces. However, the interaction forces between cellulose surfaces have not been adequately studied. In this paper, cellulose-cellulose adhesion force is studied by using a customized dual-probe atomic force microscope (AFM) with...
This paper presents several new control methods different from the classical PID control and modern control theory. Those control methods are simple without using the state equation of system and internal model principle, but its tracking performance is even better. Among those new controls, The ST-ER control and ST-ER-DE control are designed to control different kinds of precise linear systems to...
A high-performance polarizer based on the double-layer metallic gratings with air-gaps is theoretically investigated. It is observed that the transmission of the TM polarized light greatly exceeds the double-layer metallic gratings without air-gaps. The electric field distributions are plotted to interpret the physical mechanism. The improvement is attributed to the enhanced coupling between the two...
A method for the fabrication of micropolarizer arrays by electron beam lithography was presented. The experimental results have illustrated the influences of exposure dose on the performance parameters of wire grids. The maximum transmittance and extinction ratios of wire grid arrays were obtained in the visible spectrum and the comparison results of the different depths of wire grids demonstrate...
We present a new method to transfer the three dimensional (3D) porous layer from InP wafer based on the disturbance, during electrochemical etching of n-InP (100) with chronopotentiometry with current ramp in 3 mol-L−1 NaCl solution. The potential bursting phenomenon was observed due to the disturbing instantaneously. In addition, the correlation between the amplitude of the potential and the porous...
DNA mutations are analyzed by terahertz (THz) spectroscopy in a label-free manner. The 5 base mutations from the 3'-terminus on single stranded 17nt oligonucleotides have first been detected based on the microchannel. The mutations have also been validated based on the split-ring resonators (SRRs). The results clearly demonstrate the ability of THz spectroscopy combined with microstructure for label-free...
This paper presents a method for the quantitative imaging and analysis of SMCC-7721 cells using an atomic force acoustic microscope (AFAM). In this work, an AFAM was used to study the surface, intracellular structure and elasticity mapping of SMCC-7721 cells, and both topographic and acoustic images of the cells were obtained. In the experiment, the SMCC-7721 cells were treated with 4% paraformaldehyde...
Laser-Induced Breakdown Spectroscopy (LIBS) was applied in order to investigate the elemental composition in laser modified battery materials. In a first approach, thick film electrodes — all incorporating the same active material (lithium nickel manganese cobalt oxide (Li(Ni1/3Mn1/3Co1/3)O2, NMC)) — were manufactured using the tape-casting technique. In a further approach, femtosecond (fs) laser...
Laser-assisted modification of metals, polymers or ceramics yields a precise adjustment of wettability, bio-compatibility or tribological properties for a broad range of applications. Two types of advanced laser processing technologies — direct laser interference patterning and ultrafast laser-induced periodic surface structuring — were applied in this study. Formation of laser-induced periodic surface...
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