Fabrication and characterization of quantum dots with carbon nanoutbe-molecule heterojunctions

摘要

We have developed a technique to fabricate quantum dot (QD) based nanostructures by using single wall carbon nanotube (SWCNT)/molecule heterojunctions. Ends of individual SWCNT were chemically modified to form carboxylic groups which were used to connect with collagen model peptide molecules. Two kinds of structures have been fabricated and characterized by the scanning tunneling microscopy (STM) and spectroscopy (STS). In one structure, three different individual SWCNTs were connected in series with the molecules, and in the other structure, both ends of an isolated individual SWCNT was terminated with the molecule. In the latter structures, STS measurements indicated the molecule induced confinement potential in the QD.