Providing high performance electrical nano-interconnects for micro-nano electronics that are robust in harsh environments is highly demanded. Today, electrical nano-interconnects based on metallic nanowires, e.g. Ag and Cu, are limited by their positive physicochemical reactivity and ductility under large strain (i.e. irreversible dislocations and local necking-down elongation) at high temperatures or in strong oxidizing and acidic environments. Herein, to overcome these limitations, high-quality millimetre-sized soft manganese-based silicide (Mn 5 Si 3 @SiO 2 ) nanowire nanocables are designed via a glassy Si-Mn-O matrix assisted growth. The proposed nanocables exhibit good electrical performance (resistivity of 1.28 to 3.84 × 10 -6 Ωm and maximum current density 1.22 to 3.54 × 10 7 A cm −2 ) at temperatures higher than 317°C in air atmosphere, strongly acidic (HCl, PH=1.0) and oxidizing (H 2 O 2 , 10%) ambient, and under complex electric field. The proposed Mn 5 Si 3 @SiO 2 nanocables, which withstand a strain of 16.7% free of failure, could be exploited for diverse applications in flexible electronics and complex wiring configurations.
As natural one‐dimensional confined electron transport channels and photon propagation paths, nanowires (NWs) display unmatched properties and huge potential for application in diverse fields. The ability to construct a nanoscale functional system would enable significant advances in the currently desired miniaturized device integration. To date, the basic properties of all types of nanowire crystals, including metallic NWs, as well as group IV‐related, III‐V/II‐VI compounds, and metal oxide NWs, are well understood. Regarding future work, compositional (ie, doping and alloying) and structural (defect and heterostructure) designs to flexibly realize custom‐made functionality are emphasized. Along this line, recent progress is reviewed, including the basic properties (nanowire mechanics, electronics, and photonics) and applications such as photodetectors and chemical/biological sensors. A review of the correlations between the compositional/structural configuration of nanowires and the corresponding functionality is also presented. The future development direction of this field is concluded and highlighted at the end.
Molybdenum has been applied to field emission arrays because of the advantages such as good thermal and electrical properties [Il . Mo nanowire and nanotip films have been shown to have the low threshold field of field emission [2 , 3l . In the present work, individual molybdenum nanotip electrical properties and field emission are studied. Molybdenum nanotips were synthesis on stainless steel substrate (<1>1. 6 mm) by the method of thermal vapor deposition in a chamber with the vacuum of 7 Pa. Mo boat was used as the heater, which was driven by a current of 160 A and maintained at 1350 DC. The mixture of high purity Ar and H 2 gases was inlet the chamber with the flow rate of 80 sccm when the temperature of Mo boat was elevated gradually. The evaporating and depositing process lasted for 15 minutes at 1350DC. The samples were characterized and analyzed by SEM, TEM and EDS. The field emission and electrical properties of individual Mo nanotip were obtained by using the micro anode probe in-situ in a scanning electron microscope (lEOL lSM-6380LA).Fig. 1 shows the SEM and TEM images of the sample and EDS spectra of the individual nanotip. The EDX analysis shows that the nanotip is pure, containing only Mo. Fig. 2 shows in-situ charaterization set-up for the measurement of the conductivity and field emission property from the individual Mo nanotip, where the tungsten microtip is used as an anode and the Mo nanotips on stainless steel substrate as a cathode. Four individual nanotips electrical conduction properties were measured respectively. As shown in Fig. 3, the I-V curves of the individual Mo nanotip are close to a linear line, meaning that there is a good electrical contact existing between the nanotip and the substrate. The conductivity of the Mo nanotip is in the rang of lOo� 10
3C-SiC, 2H-SiC and their hybrid nanowires were synthesized in a controllable manner via changing CH4 flow rates. It is found that higher CH4 supply facilitates the wurtzite phase growth, while the other phases formed when decreasing the flow rate.
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