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Table 1 Comparison between SWNT and MWNT[4]

From: Carbon nanotubes: properties, synthesis, purification, and medical applications

Single layer of graphene Multiple layers of graphene
Catalyst is required for synthesis Can be produced without catalyst
Bulk synthesis is difficult as it requires proper control over growth and atmospheric condition Bulk synthesis is easy
Purity is poor Purity is high
A chance of defect is more during functionalization A chance of defect is less but once occurred it is difficult to improve
Less accumulation in the body More accumulation in the body
Characterization and evaluation is easy It has very complex structure
It can be easily twisted and is more pliable It cannot be easily twisted