Packing-dependent pore structures in single-walled carbon nanotube arrays

Abstract

Based on a self-similar array model of single-walled carbon nanotubes (SWNTs), the pore structure of SWNT bundles is analyzed and compared with that obtained from the conventional triangular model and adsorption experimental results. In addition to the well known cylindrical endo-cavities and interstitial pores, two types of newly defined pores with diameters of 2–10 and 8–100 nm are proposed, inter-bundle pores and inter-array pores. In particular, the relationship between the packing configuration of SWNTs and their pore structures is systematically investigated.

Nonlinear low‐velocity impact analysis of functionally graded nanotube‐reinforced composite cylindrical shells in thermal environments

“…Recently, carbon nanotubes (CNTs) have attracted researchers' attention because of their exceedingly favorable properties. CNTs have remarkable mechanical properties in comparison with traditional carbon fibers . These properties have drawn considerable attention in using CNTs as reinforcement in polymer composites to get lightweight structural materials with improved thermo‐mechanical characteristics .…”

A Molecular View of Adsorption on Nanostructured Carbon Materials

“…The structure of the C(111) surface at intermediate H coverage, however, is largely unknown. Similar consideration can be made for the two other faces (110), and (100).…”

“…In addition to the wellknown α-and β-pores, two types of newly defined pores with diameters of 2-10 and 8-100 nm have been evidenced for SWCNT arrays, inter-bundle (packing of bundles) pores and inter-array (bundle arrays) pores. 110 For MWCNTs, it was shown than the aggregated (inter-tube) pores are much more important for adsorption than the endo-cavities. 105 It is worth noting that, since it is difficult to describe the complex secondary structures of such materials by the methods of Euclidean geometry, the method of fractal geometry has been applied.…”

“…When considering adsorption on diamond surfaces, three crystallographic faces should be considered, namely the (111), (110), and (100) (Figure 3.2). 13 Normally, a diamond crystal is mainly bordered by stable (100) and (111) surfaces.…”

“…The (100) surface reconstructs into an energetically favorable (2 × 1, dimer-based reconstructions) structure, while the (111) substrate exhibits the Pandey chain configuration. [14][15][16] The (110) face, which is found to be the most rapidly growing phase during chemical vapor deposition (CVD) growth assumes a stable (1 × 1) configuration. 14 There are two kinds of adsorption sites, called T 4 and H 3 on the (111) surface of the diamond crystal structure (Figure 3.2e).…”