Figure 2From: Synthesis and Enhanced Field-Emission of Thin-Walled, Open-Ended, and Well-Aligned N-Doped Carbon NanotubesTEM images of the as-grown products at different growth temperature: a–c are the low-magnification TEM images of a 780, 820, and 860°C sample, respectively; d, e are the high-magnification TEM images of a 860°C sampleBack to article page