This chapter discusses the existence of single-wall carbon nanocones (SWNCs), especially nanohorns (SWNHs) in organic solvents in the form of clusters. A theory is developed based on a bundlet model describing their distribution function by size. Phenomena have a unified explanation in bundlet model in which free energy of an SWNC, involved in a cluster, is combined from two components: a volum...

We use scanning near-field optical microscopy to study the response of hexagonal boron nitride nanocones at infrared frequencies, where this material behaves as a hyperbolic medium. The obtained images are dominated by a series of "hot" rings that occur on the sloped sidewalls of the nanocones. The ring positions depend on the incident laser frequency and the nanocone shape. Both dependences ar...

High-density and well-aligned ZnO-ZnS core-shell nanocone arrays were synthesized on fluorine-doped tin oxide glass substrate using a facile and cost-effective two-step approach. In this synthetic process, the ZnO nanocones act as the template and provide Zn2+ ions for the ZnS shell formation. The photoluminescence spectrum indicates remarkably enhanced luminescence intensity and a small redshi...

nanobumps and (d,e) gold nanocones using focused azimuthal (a,d) and radial polarizations (b,e). Representative top-view scanning electron microscopy (SEM) images of (c) gold nanobumps from the same array and (f) corresponding gold nanocones. Insets (d-f) correspond to SHG and SEM images of a gold nanorod on the same substrate. SECOND-HARMONIC GENERATION MICROSCOPY OF INDIVIDUAL METAL NANOPARTI...