Chemical modification of silicene

TL;DR

This paper reviews various chemical modification techniques for silicene, a reactive two-dimensional silicon material, and discusses how these modifications alter its properties and potential applications in electronics and optoelectronics.

Contribution

It provides a comprehensive overview of chemical modification methods for silicene and analyzes their effects on its properties and applications.

Findings

Chemical modifications can tune silicene's electronic and optical properties.

Different methods like hydrogenation and doping significantly alter silicene's behavior.

Chemically modified silicene shows promise for advanced electronic applications.

Abstract

Silicene is a two-dimensional material, which is composed of a single layer of silicon atoms with sp2-sp3 mixed hybridization. The sp2-sp3 mixed hybridization renders silicene excellent reactive ability, facilitating the chemical modification of silicene. It has been demonstrated that chemical modification effectively enables the tuning of the properties of silicene. We now review all kind of chemical modification methods for silicene including hydrogenation, halogenation, organic surface modification, oxidation, doping and alloying. The effects of these chemical modification methods on the geometrical, electronic, optical and magnetic properties of silicene are discussed. The potential applications of chemically modified silicene in a variety of fields such as electronics, optoelectronics and magnetoelectronics are introduced. We finally envision future work on the chemical modification of silicene for the sake of further advancing the development of silicene.