Size-dependent evolution of graphene nanopores under thermal excitation.
Graphene nanopores expand when pore diameter is larger than membrane thickness after heat treatment; otherwise, nanopore size shrinks. Such size-dependent evolutionary mechanism of nanopores is considered as thermal-induced migration of uncombined carbon atoms. The amount of carbon adatoms determines the extent of diameter change. This could provide an applicable strategy for nanopore fabrication.
SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, PR China.
Tao
T
Xu
Kuibo
K
Yin
Xiao
X
Xie
Longbing
L
He
Binjie
B
Wang
Litao
L
Sun