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Graphene oxide (GO) films are fabricated by direct evaporation of GO suspension on Cu foils under mild heating, and ultrathin paper-like reduced graphene films are produced by reducing graphene oxide films on Cu foils in H2-containing atmosphere at different temperature. Further investigation demonstrates that the reduced graphene film with ∼15um in thickness not only possesses high electrical conductivity...
The thickness and composition determination of Silicon-Germanium (SiGe) films have been demonstrated using simultaneous X-ray Photoelectron (XPS) and X-ray Fluorescence (XRF) measurements. Measurements of SiGe films in various applications were explored. It is shown that the measurement is sensitive and linear over a much wider range of SiGe thickness, with excellent precision. Long term stability...
This paper presents a stretchable Planar Inverted-F Antenna (PIFA) based on a new metallization technique of depositing nanoscale thin (50/100nm) Au film on elastomer Polydimethylsiloxane (PDMS). The thin metal films can be reversibly stretched up to 20% without losing electrical conduction. The PIFA antenna made of new materials can work under a 10% strain and return to its original state after removal...
This paper investigates the fundamental electromagnetic characterization of metallised elastomers at microwave frequencies for antenna applications. Stretchable or flexible antennas will significantly expand stretchable electronics applications both in the communication and biomedical sectors. A flexible dipole and a flexible monopole antenna with self compensation in the perpendicular direction are...
This paper investigates the fundamental properties of metallised elastomers at microwave frequencies for microwave transmission line and wireless antenna applications. Stretchable or elastic antennas will significantly expand stretchable electronics applications both in the communication and biomedical sectors. Fundamental electromagnetic characterisations of elastic transmission line and antennas...
The flashover phenomena in vacuum have been an interesting issue among many researchers in the fields of both electrical and electronic systems for more than half a century. However, the phenomena are so complicated and up to now the related mechanisms are still not understood clearly. In this paper the ICCD camera was used to grasp the dynamic flashover images on the surface of alumina ceramic in...
The surface flashover phenomena across insulating materials always lead to the failure of system insulation and may cause serious accidents. Based on the synchronized measurement of optical and electrical signals, the flashover phenomena along alumina ceramics and polytetrafluoroethylene (PTFE) are investigated under impulse voltage in vacuum. The planar electrode system is used with the advantage...
Hydrogenated Nano-crystalline silicon thin films with deposition rate of 0.4nm/s were prepared by conventional plasma enhanced chemical vapor deposition technique under the high deposition pressure (133∼266Pa), which were characterized and analyzed by Raman spectra and IR spectra. The results showed the average grain size is about 6nm, dark-conductivity value is about 10−4 10−3 Ω−1. cm−1; The FTIR...
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