Synthesis and electrical property of metal/ZnO coaxial nanocables

Abstract

Ag/ZnO and Cu/ZnO coaxial nanocables were fabricated using AgNO3 or copper foil as source materials by the vapor-liquid-solid process. The coaxial nanocables consist of a crystalline metallic Ag or Cu core and a semiconductor ZnO shell. The evolution of the Ag/ZnO products having different morphologies was investigated by stopping the heating at different temperatures. The diameters of the Ag/ZnO nanocables and the Ag cores could be modulated by changing Ag ratio in the source. The electrical characteristics of the Ag/ZnO contact and the influence of annealing reveal a Schottky diode behavior for a single Ag/ZnO nanocable device. The nanocables with uniform shape and controlled size are expected to provide a new choice in various applications of biological detection, nanothermometer, and photocatalysis.

Fast Ion Surface Energy Loss and Straggling in the Surface Wake Fields

“…Interestingly, the mean range of the wake potential is in accord with the prediction by Echenique and Pendry [23]. As metal insulator and metal semiconductor bilayers find potential applications [16], further measurements with bilayer foils of differing thicknesses and conductivity, and especially of the Coulomb explosions of molecular projectiles, can be expected to help develop a consistent theoretical understanding of the origin of the differential energy loss, and verify our proposed SELF wake field hypothesis.…”

“…Aluminized polypropylene is an important window foil for gas detectors. Metal semiconductor bilayers are important in applications of biological detection, nanothermometers, photo catalysis, photocells, and detectors [16].…”

“…The present measurements have been performed using the 15 UD (unit doubled) tandem Pelletron accelerator at the Inter-University Accelerator Center [17]. Ion beams of 56 Fe with energy ranging 85-155 MeV and molecular ion beam of 16 OH + of energy 20 MeV were passed through various bilayer targets, viz., polypropylene and aluminum (PP-Al), polyethylene terephthalate and germanium (PET-Ge), and polypropylene and gold (PP-Au). The schematic of the experimental setup is shown in Fig.…”

Ultrafast nonlinear optical properties and carrier dynamics of silver nanoparticle-decorated ZnO nanowires

“…DT p-v is the measured peak-valley transmittance difference, Df 0 ¼ kn 2 I 0 L eff is the on-axis phase-shi and I 0 is the incident intensity at focus. S is the linear transmittance of the aperture given by S ¼ 1 À exp À2(r a /w a ) 2 , where r a is the radius of the aperture and w a is the radius of the laser spot before the aperture. The values of b and n 2 were evaluated by tting the experimental data to eqn (4) and (5).…”

“…Up to now, various metal/nonmetal and semiconductor nanostructures have been successfully produced by different methods. [1][2][3] Also, metal/nonmetal (such as noble metal, metal oxide and carbon)-doped or decorated semiconductors have been demonstrated with improved optoelectronic, photoelectrochemical and optical properties. [4][5][6][7][8] Among various Group II-VI semiconductor materials, one dimensional nanostructures of ZnO possess advantages of large exciton binding energy of 60 meV and a wide direct band gap of 3.36 eV at room temperature; these properties make them promising for technological applications such as in light-emitting diodes, piezoelectric transducers, phosphors, sensors, UV lasers, solar cells, gas sensor optoelectronics, photovoltaics, photocatalysis, photonics, and UV photodetectors (PDs), [9][10][11][12] where photoexcited carrier dynamic processes in the femtosecond to nanosecond timescales play a critical role.…”