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(a) SWNTs as received; and (b) after coating with 100; and (c) 200 cycles of Al2O3 ALD. Samples were mounted onto a TEM grid prior to deposition. The coating thickness is approximately 8 ± 2 nm after 100 cycles and 20 ± 3 nm after 200 cycles. The rope-like aggregates were coated with a relatively uniform coating, whereas individual single-walled nanotubes demonstrated nodular growth. After 200 cycles, the nodules began to grow together into a cohesive film.
