Various forms of carbon, especially the nanocarbons, have received considerable attention in recent years. There has also been some effort to investigate borocarbonitrides, BxCyNz, comprising besides two elements on either side. Although uniformly homogeneous compositions borocarbonitrides may be difficult generate, there attempts prepare them by solid state as well gas phase reactions. Some products so obtained show evidence for presence BCN networks. Then, are composites (G–BN) containing...

A systematic study was conducted on the fabrication, structural characterization, and transport properties of Zn nanowires with diameters between 40 100 nm. Zinc were fabricated by electrodepositing into commercially available polycarbonate (PC) or anodic aluminum oxide (AAO) membranes. By controlling electrodeposition process, we found that can be single-crystal, polycrystalline Zn, crystalline Zn/nanocrystalline ZnO composites, entirely ZnO. The microstructure chemistry characterized using...

A simple method for penetrating the barrier layer of an anodic aluminum oxide (AAO) film and detaching AAO from residual Al foil was developed by reversing bias voltage in situ after anodization process is completed. With this technique, we have been able to obtain large pieces free-standing membranes with regular pore sizes sub-10 nm. By combining Ar ion milling wetting enhancement processes, Au nanowires were grown nm pores films. Further scaling down size extension deposition nanotubes...

Transport measurements were made on a system consisting of zinc nanowire array sandwiched between two bulk superconducting electrodes (Sn or In). It was found that the superconductivity Zn nanowires 40 nm diameter is suppressed either completely partially by electrodes. When are driven into their normal state magnetic field, switch back to state. This phenomenon significantly weakened when one replaced metal. The not seen in wires with diameters equal thicker than 70 nm.

While bulk bismuth (Bi) is a semimetal, we have found clear evidence of superconductivity in 72 nm diameter crystalline Bi nanowire below 1.3 K. In parallel magnetic field (H), the residual resistance Tc displays periodic oscillations with H, and period corresponds to superconducting flux quantum. This result indicates that originates from cylindrical shell between inner core surface oxide layer. Under perpendicular state shows Shubnikov−de Haas (SdH)-like oscillations, signature normal...

We study proximity-induced superconductivity in gold nanowires as a function of the length nanowire, magnetic field, and excitation current. Short exhibit sharp superconducting transition, whereas long show nonzero resistance. At intermediate lengths, however, we observe two transitions; normal regions are separated by what call minigap phase. Additionally, detect periodic oscillations differential magnetoresistance. suggest that phase well originate from coexistence with region near center...

In the present study, fabrication of micro-channel on glass fiber reinforced plastic (GFRP) sheet has been performed through micro-electrochemical spark machining process. Box-Behnken design followed to conduct experiments and influence parameters their ranges that is, applied voltage (50 V–60 V), duty factor (35%–45%), electrolyte concentration (20–30 wt%), pulse frequency (6–10 kHz) quality investigated. The width (WMC), delamination extent (DE), heat-affected zone (HAZ) are considered as...

In an earlier paper [Tian et al., Phys. Rev. Lett. 95, 076802 (2005)], we reported antiproximity effect (APE) in a system consisting of $40\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ diameter Zn nanowires (ZNWs) sandwiched between bulk Sn and electrodes. When the electrodes are superconducting state, superconductivity ZNWs is suppressed. driven normal by magnetic field, recovers. this report systematic transport studies phenomenon with Pb The APE found subtle, showing up primarily significantly...

An unusual enhancement of resistance (i.e., a ``superresistivity'') below certain characteristic temperature ${T}_{\text{sr}}$ was observed in granular Bi nanowires. This ``superresistive'' state found to be dependent on the applied magnetic field as well excitation current. The suppression by resembles that superconductor. superresistivity appears related nucleation local superconductivity inside nanowire without long-range phase coherence. phenomenon is reminiscent ``Cooper-pair...

Micro-electrochemical spark machining (µ-ECSM) is an advanced hybrid approach to machine materials, irrespective of their electrical conductivity. This article illustrates the state-of-the-art review current research on wear mechanism micro-tool electrodes used in µ-ECSM process. The influence different and non-electrical parameters tool rate, inducing dimensional inaccuracies fabricated components, has been addressed. various tool, such as material, surface morphology texture, shape, size,...

Micro-electrochemical discharge machining is hybrid process which based on combined principle of electro and chemical machining. It suitable for both conductive as well non-conductive materials. In this study a micro hole drilled Ti-6Al-4V work piece by varying parameters like electrolyte concentration, voltage duty factor at three different levels. Orthogonal array L9 considered design performing experiments. The Grey relation analysis (GRA) was performed to optimize the output i.e....

This work demonstrates the viability of powder-mixed micro-electrochemical discharge machining (PMECDM) process to fabricate micro-holes on C103 niobium-based alloy for high temperature applications. Three processes are involved simultaneously i.e. spark erosion, chemical etching, and abrasive grinding removal material while classical electrochemical involves double actions etching. The electrolyte resulted in rapid along with a better surface finish as compared (MECDM). Further, results...

The current study reports some interesting growth of novel In2O3 nanostructures using ambient-controlled chemical vapor deposition technique in the presence a strongly reducing hydrazine ambient. experiments are systematically carried out by keeping either carrier gas flow rate or source temperature constant, and varying other. For each depositions, is studied at three different locations downstream. In this paper, we report including nanodonuts, nanomushrooms, standing nanorods long...

We have fabricated intermetallic AuSn nanowires by electrochemical deposition in porous polycarbonate membranes. By controlling the parameters, of a single phase, namely AuSn, can be fabricated. are found to crystalline and fairly resistant oxidation. Electrical transport measurements on arrays showed superconducting transition temperature, T(c)∼1.5 K. In addition, four-probe were made individual freestanding with electrodes formed focused ion beam (FIB). Results from two sets close agreement.