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The van der Waals(vdW) interactions of carbon nanotube(CNT)–substrate and CNT–CNT can cause strong adhesion. The adhesion can lead to radial deformation of CNTs, which is shown in both experiments and theoretical analysis. A scaling approach is used to predict the mechanical properties, vdW adhesion, and the elastic deformation of CNTs. It is found that the indentation of CNT is proportional to R7/4 and h3/2 in nanotube–substrate system and two same CNT system. Here, R and h are the radius and the wall thickness of CNT, respectively. The indentation ratio H1/H2 for CNT–CNT is proportional to(R1/R2)3/2 and(h2/h1)3/2.
The van der Waals (vdW) interactions of carbon nanotube (CNT) -substrate and CNT-CNT can cause strong adhesion. The adhesion can lead to radial deformation of CNTs, which is shown in both experiments and theoretical analysis. A scaling approach is used To predict the mechanical properties, vdW adhesion, and the elastic deformation of CNTs. It is found that the indentation of CNT is proportional to R7 / 4 and h3 / 2 in nanotube- substrate system and two same CNT system. Here, R and h The indentation ratio H1 / H2 for CNT-CNT is proportional to (R1 / R2) 3/2 and (h2 / h1) 3/2.