Rehybridization of electronic structure in compressed two-dimensional quantum dot superlattices

被引:66
作者
Medeiros-Ribeiro, G
Ohlberg, DAA
Williams, RS
Heath, JR
机构
[1] Hewlett Packard Labs, Palo Alto, CA 94304 USA
[2] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
关键词
D O I
10.1103/PhysRevB.59.1633
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Two-dimensional superlattices of organically passivated 2.6-nm silver quantum dots were prepared as Langmuir monolayers and transferred to highly oriented pyrolytic graphite substrates. The structural and electronic properties of the films were probed with variable temperature scanning tunneling microscopy. Particles passivated with decanethiol (interparticle separation distance of similar to 1.1 +/- 0.2 nn) exhibited Coulomb blockade and staircase. For particles passivated with hexanethiol or pentanethiol (interparticle separation distance of similar to 0.5 +/- 0.2 nm), the single-electron charging was quenched, and the redistribution of the density of states revealed that strong quantum mechanical exchange, i.e., wave-function hybridization, existed among the particles in these films. [S0163-1829(99)03604-8].
引用
收藏
页码:1633 / 1636
页数:4
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