title: Effects of crystal shape on the energy levels of zero-dimensional PbS quantum dots.
abstract: Nanometer-size PbS quantum dots have been made by electrodeposition on a Au(111) substrate. The deposited nanocrystals have a flattened cubic shape. We probed the single-electron energy-level spectrum of individual quantum dots by scanning tunneling spectroscopy and found that it deviates strongly from that of spherical PbS quantum dots. The measured energy-level spectrum is successfully explained by considering strong confinement in a flattened cubic box.
authors.affiliation: Debye Institute, Utrecht University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands.
authors.forename: Z
authors.initials: Z
authors.lastname: Hens
authors.forename: D
authors.initials: D
authors.lastname: Vanmaekelbergh
authors.forename: E J A J
authors.initials: EJ
authors.lastname: Stoffels
authors.forename: H
authors.initials: H
authors.lastname: Van Kempen