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We report pulsed-jet deposition of single-wall and double-wall carbon nanotubes (SWNTs and DWNTs; CNTs) onto a clean Cu(111) surface and their scanning tunneling microscopy(STM) observations under ultra-high vacuum (UHV). The clean Cu(111) surface prepared by a repeated Ar-sputtering and annealing is introduced into a load-lock chamber kept at a 10−5-Pa range vacuum, and the CNTs dispersed in a chloroform solution byultrasonication are pulse-injected onto the surface. Since the substrate is annealed at 700 K to remove the residual solvent molecules, high resolution lattice images of the CNTs are successfullyobserved bySTM. High-resolution chirality-resolved images of the two SWNTs with a metal cluster are also observed, supporting the well accepted growth mechanism of the CNTs from the metal-catalyst cluster. The present pulsed-jet deposition in high-vacuum is superior to the conventional spin-coating or drop-coating techniques for preparing clean and well-defined CNTs on clean surfaces for high-resolution and contamination-free UHV-STM observation.
Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.