Issue 10, 2020

Single-nanostructure bandgap engineering enabled by magnetic-pulling thermal evaporation growth

Abstract

Realizing the substantial potential of bottom-up 1D semiconductor nanostructures in developing functional nanodevices calls for dedicated single-nanostructure bandgap engineering by various growth approaches. Although thermal evaporation has been advised as a facile approach for most semiconductors to form 1D nanostructures from bottom-up, its capability of achieving single-nanostructure bandgap engineering was considered a challenge. In 2011, we succeeded in the direct growth of composition-graded CdS1−xSex (0 ≤ x ≤ 1) nanowires by upgrading the thermal-evaporation tube furnace with a home-made magnetic-pulling module. This report aims to provide a comprehensive review of the latest advances in the single-nanostructure bandgap engineering enabled by the magnetic-pulling thermal evaporation growth. The report begins with the description of different magnetic-pulling thermal evaporation strategies associated with diverse examples of composition-engineered 1D nanostructures. Following is an elaboration on their optoelectronic applications based on the resulting single-nanostructure bandgap engineering, including monolithic white-light sources, proof-of-concept asymmetric light propagation and wavelength splitters, monolithic multi-color and white-light lasers, broadband-response photodetectors, high-performance transistors, and recently the most exciting single-nanowire spectrometer. In the end, this report concludes with some personal perspectives on the directions toward which future research might be advanced.

Graphical abstract: Single-nanostructure bandgap engineering enabled by magnetic-pulling thermal evaporation growth

Article information

Article type
Review Article
Submitted
21 iyl 2020
Accepted
07 avq 2020
First published
07 avq 2020
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2020,2, 4305-4322

Single-nanostructure bandgap engineering enabled by magnetic-pulling thermal evaporation growth

J. Xu, X. Wang and R. Nötzel, Nanoscale Adv., 2020, 2, 4305 DOI: 10.1039/D0NA00595A

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