Metallic gold (Au) and platinum (Pt) thin films were deposited on silicon nanocones (Si-NCs) by sputtering to elucidate the effects of work function and conductivities on the field electron emission characteristics of surface-modified Si-NCs. The results showed that for Pt/Si-NCs and Au/Si-NCs, although the turn-on field defined at a corresponding current density of 10 μA cm(-2) only improved f...

The existence of single-wall carbon nanotubes (SWNTs) in organic solvents, in the form of clusters, is discussed [1]. A theory is developed based on a bundlet model for clusters, describing the distribution function of clusters by size [2]. The phenomena have a unified explanation in the bundlet model of clusters, in accordance with which the free energy of an SWNT, involved in a cluster, is co...

Laser propulsion and guide of nanosized objects is fundamental for a wide number of applications. These applications are often limited by the fact that the optical forces acting on nanoparticles are almost negligible even in the favorable case of metallic particles and hence large laser powers are needed to accelerate and guide nanosize devices in practical applications. Furthermore, metallic n...

The synthesis of fundamentally small MoS2 nanotubes and nanocones(horns) that have proven elusive in prior studies has been achieved via ablation a precursor mixture crystallites + MoO3 by highly concentrated solar radiation. special far-from-equilibrium conditions the furnace prove conducive to generation these singular nanostructures. Extensive electron microscopy characterization results (tr...

Hybrid structures of few or single quantum dots (QDs) coupled to single optical antennas are of prime interest for nano-optical research. The photoluminescence (PL) signal from single nanoemitters, such as QDs, can be enhanced, and their emission characteristics modified, by coupling them to plasmonic nanostructures. Here, a self-aligned technique for placing nanoscale QDs with about 10 nm late...

A hierarchical array of ZnO nanocones covered with ZnO nanospikes was hydrothermally fabricated and employed as the photoanode in a CdS quantum dot-sensitized solar cell (QDSSC). This QDSSC outperformed the QDSSC based on a simple ZnO nanocone photoanode in all the four principal photovoltaic parameters. Using the hierarchical photoanode dramatically increased the short circuit current density ...

Flexible broadband antireflective and light-absorbing nanostructured gold thin films are fabricated by gold vapor deposition onto Teflon films modified with nanocone arrays. The nanostructures are created by the oxygen plasma etching of polystyrene bead monolayers on Teflon surfaces. The periodicity and height of the nanocone arrays are controlled by the bead diameter and the overall etching ti...