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Figure 3 | Nanoscale Research Letters

Figure 3

From: Effect of Size-Dependent Thermal Instability on Synthesis of Zn2 SiO4-SiO x Core–Shell Nanotube Arrays and Their Cathodoluminescence Properties

Figure 3

a Low-magnification TEM image of nanotubes; b Histogram of the diameter distribution based on 70 randomly selected nanotubes. The inset shows tip-end TEM images for the three types of nanotubes. c High-magnification TEM images, type I: a SiO x -coated polycrystalline Zn2SiO4 nanotube, f type II: a SiO x nanotube periodically encapsulated with single-crystalline Zn2SiO4 nanoparticles, and i type III: a SiO x -coated single-crystalline Zn2SiO4 nanotube; d, g, and j corresponding HRTEM images taken from the framed areas marked in (c), (f), and (i), respectively; (e) and (k) corresponding SAED patterns taken from the nanotubes shown in (c) and (i), respectively. (h) SAED pattern taken from the encapsulated nanoparticle in (f). The diameter distributions for type I, II, III nanotubes are labeled in different sectors in (b)

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