Imaging and tunneling spectroscopy of gold nanocrystals and nanocrystal arrays |
| |
| Authors: | T.P. Bigioni L.E. Harrell W.G. Cullen D.K. Guthrie R.L. Whetten P.N. First |
| |
| Affiliation: | (1) School of Chemistry, Georgia Institute of Technology, Atlanta, GA 30332-0400, USA, US;(2) School of Physics, Georgia Institute of Technology, Atlanta, GA 30332-0430, USA, US;(3) Microelectronics Research Center, Georgia Institute of Technology, Atlanta, GA 30332-0269, USA, US;(4) School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0250, USA, US |
| |
| Abstract: | Scanning tunneling microscopy (STM) and spectroscopy (STS) have been used to determine the structural and electronic properties of thiol-passivated 29000 amu gold nanocrystals, both individually and in spontaneously formed quasi-two-dimensional arrays. Experiments were performed at temperatures of 300 K, 77 K, and 8 K. Even at room temperature, tunneling through these 1.7 nm nanocrystals is shown to give rise to a Coulomb blockade. At cryogenic temperatures, the spectroscopy of the nanocrystals in arrays and in isolation shows an incremental charging effect (the Coulomb staircase) and evidence is found for quantization of the electronic states. Received: 10 September 1998 / Received in final form: 16 February 1999 |
| |
| Keywords: | PACS. 61.46.+w Clusters nanoparticles and nanocrystalline materials - 71.24.+q Electronic structure of clusters and nanoparticles - 73.61.Tm Nanocrystalline materials |
| 本文献已被 SpringerLink 等数据库收录！ |
|
