Lesson 2.4 — Chemical Vapour Deposition (CVD)
Duration: 22:15
Lesson 2.4: Chemical Vapour Deposition (CVD)
Chemical Vapour Deposition (CVD) is a cornerstone technique for producing high-purity, high-performance solid materials. In this lesson, we examine thermal CVD, plasma-enhanced CVD (PECVD), and atomic layer deposition (ALD) — with particular focus on graphene and carbon nanotube growth mechanisms.
Learning Objectives
- —Distinguish between thermal CVD and PECVD process parameters
- —Interpret Raman spectra for graphene quality assessment
- —Evaluate substrate selection for uniform thin-film growth
Downloadable Resources
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[00:00:15] Welcome back. In this lesson, we turn our attention to Chemical Vapour Deposition — arguably the most versatile technique for synthesising carbon nanostructures at scale.
[00:00:45] CVD operates on a deceptively simple principle: a volatile precursor decomposes on a heated substrate, leaving behind a thin solid film. The devil, as always, is in the details.
[00:01:20] Let us first distinguish between thermal CVD, where decomposition is driven purely by temperature, and plasma-enhanced CVD, or PECVD, where a plasma discharge lowers the activation energy...