Nonthermal Plasma-Enhanced Chemical Vapor Deposition of Two-Dimensional Molybdenum Disulfide

Chad A. Beaudette, Jacob T. Held, K. Andre Mkhoyan, Uwe R. Kortshagen

Research output: Contribution to journalArticle

Abstract

Molybdenum disulfide (MoS2) is being studied for a wide range of applications including lithium-ion batteries and hydrogen evolution reaction catalysts. In this paper, we present a single-step nonthermal plasma-enhanced chemical vapor deposition (PECVD) process for the production of two-dimensional MoS2. This method provides an alternative route to established CVD and plasma synthesis routes. The approach presented here synthesizes films in only a few minutes using elemental sulfur (S8) and molybdenum pentachloride (MoCl5) as precursors. Deposition utilizes a nonthermal inductively coupled plasma reactor and temperatures around 500 °C. Film growth characteristics and nucleation are studied as a function of precursor concentrations, argon flow rate, plasma power, and deposition time. Few-layer two-dimensional (MoS2) films were formed at low precursor concentrations. Films with nanoparticle-like features were formed when the precursor concentration was high. Noncontinuous nonstoichiometric films were found at low plasma power, while high plasma power led to continuous films with good stoichiometry. The vacancies and defects in these films may provide active sites for hydrogen evolution.

Original languageEnglish (US)
Pages (from-to)21853-21861
Number of pages9
JournalACS Omega
Volume5
Issue number34
DOIs
StatePublished - Aug 20 2020

How much support was provided by MRSEC?

  • Primary

Reporting period for MRSEC

  • Period 7

Fingerprint Dive into the research topics of 'Nonthermal Plasma-Enhanced Chemical Vapor Deposition of Two-Dimensional Molybdenum Disulfide'. Together they form a unique fingerprint.

Cite this