Carbon nanotubes (CNTs) are nanoscale cylindrical carbon structures that can provide high thermal and electrical conductivity along with mechanical strength and flexibility, making them ideal for various applications. Scanning electron microscopes (SEM) are essential for analysing CNTs because their performance depends on nanoscale features such as distribution, density, and uniformity. SE imaging can be performed at very low beam energies and with an extremely small diameter beam, allowing for high spatial resolutions. 

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High-resolution SEM images of carbon nanotubes (CNTs) showing their nanoscale morphology and distribution, with individual and bundled nanotubes forming an interconnected network