多重同心纳米环结构的制备

Fabrication of multiple concentric nanoring structures.

作者信息

Somaschini C, Bietti S, Koguchi N, Sanguinetti S

机构信息

L-NESS and Dipartimento di Scienza dei Materiali, Universita di Milano Bicocca, Via Cozzi 53, I-20125, Milano, Italy.

出版信息

Nano Lett. 2009 Oct;9(10):3419-24. doi: 10.1021/nl901493f.

DOI:10.1021/nl901493f

PMID:19764709

Abstract

We present the fabrication of GaAs/AlGaAs Multiple (from three to five) concentric nanoring structures by an innovative growth method based on droplet epitaxy and characterized by short time As supply to the Ga droplets at different substrate temperatures. The formation mechanism has been interpreted on the basis of a detailed ex situ and in situ characterization of nanostructure morphology and surface reconstruction. We introduce design criteria which will allow to obtain concentric quantum ring structures of the desired complexity.

摘要

我们展示了通过一种基于液滴外延的创新生长方法制备三到五个同心的GaAs/AlGaAs纳米环结构，其特点是在不同衬底温度下向Ga液滴短时间供应As。基于对纳米结构形态和表面重构的详细非原位和原位表征，对形成机制进行了解释。我们引入了设计标准，这将有助于获得所需复杂程度的同心量子环结构。