McGill.CA / Science / Department of Physics

CPM Seminar

Single-wall carbon nanotubes:
Structure and transport below 1 micron

Prof. Alan T. Johnson

Department of Physics and Astronomy
University of Pennsylvenia

Single wall carbon nanotubes (SWNTs) are a new nanomaterial with remarkable mechanical and electronic properties that are of fundamental scientific interest and hold out the possibility of novel applications. I will discuss the nanomechanics, chemistry and electronic properties of SWNTs, and how our understanding of these topics has been enhanced by experiments that probe individual tubes at the nanometer scale. I will then focus on my group's experiments on STM of single tubes and bundles of tubes that show how tubes appear to act as "quantum corrals" for electrons. Finally, I will discuss how we fabricate and measure single-tube electrical circuits that act as transistors and diodes at room temperature, and quantum-effect single electron transistors at low temperature.

Thursday, May 13th 1999, 15:30
Ernest Rutherford Physics Building, room 114