Durable and robust large-area ultrathin CNT sheets can be produced from pristine CNT sheets following proprietary CNT purification and densification processes. The resulting CNT sheets are free-standing, flexible, durable, robust, ultrathin (< 5 m) and lightweight (~6 g per m2). They withstand corrosion and heat and are superior at shielding EMI (effectiveness >= 55 dB in the X band).CNT sheet,CNT purification,CNT sheet densification,pure CNT sheet,thin CNT sheet,EMI,EMI shielding,aircraft and spacecraft
