Abstract: The present teachings provide methods for sorting nanotubes according to their wall number, and optionally further in terms of their diameter, electronic type, and/or chirality. Also provided are highly enriched nanotube populations provided thereby and articles of manufacture including such populations.

Abstract: The separation of single-walled carbon nanotubes (SWNTs), by chirality and/or diameter, using centrifugation of compositions of SWNTs in and surface active components in density gradient media.

Abstract: The separation of single-walled carbon nanotubes (SWNTs), by chirality and/or diameter, using centrifugation of compositions of SWNTs in and surface active components in density gradient media.

Abstract: A method of forming a nanoscale pattern on a substrate surface. In one embodiment, the method includes the steps of providing a substrate having a surface; providing a nanoscale pattern forming device, comprising an elongated cantilever that has a tip portion proximate an end of the elongated cantilever; and controllably illuminating at least the tip portion of the cantilever with a beam of substantially coherent monoenergetic particles when the cantilever moves relative to the substrate to form a nanoscale pattern on the surface, wherein the tip portion of the cantilever is made from lightly doped silicon.

Abstract: Various methods related to the preparation of transparent electrical conductors based on carbon nanotubes having enhanced optical and electrical properties are disclosed. In some embodiments, the methods involve employing carbon nanotubes that have been presorted according to electronic type and/or optical absorbance for use in transparent electrical conductors. Other embodiments involve use of carbon nanotube bundles that have been pre-sorted according to bundle density.

Abstract: The present teachings provide methods for providing populations of single-walled carbon nanotubes that are substantially monodisperse in terms of diameter, electronic type, and/or chirality. Also provided are single-walled carbon nanotube populations provided thereby and articles of manufacture including such populations.

Abstract: A cryogenic variable temperature scanning tunneling microscope of novel design and component configuration, for use in conjunction with a variety of low temperature methodologies.

Abstract: A conductive atomic force microscopy (cAFM) technique which can concurrently monitor topography, charge transport, and electroluminescence with nanometer spatial resolution. This cAFM approach is particularly well suited for probing the electroluminescent response characteristics of operating organic light-emitting diodes (OLEDs) over short length scales.