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The techniques for curing cancers of human have been looking for decades.The folic acid-capped gold nanocages (FA-AuNC) whose average diameter is about 60 nm have been obtained for near infrared thermo-perishing of human cancer cells.Their extreme thin shell (3~5 nm) of the gold nanocages spurs strong effect of surface plasmon resonance (SPR) to absorb near infrared (NIR) light and to convert the light-energy into heat efficiently.