NANO LETTERS

DAI JY, WANG DX, ZHANG M, NIU TC, LI A, YE M, QIAO S, DING GQ, XIE XM, WANG YQ, CHU PK, YUAN QH, DI ZF, WANG X, DING F, YAKOBSON BI

MATERIALS RESEARCH EXPRESS

SONG GY, YUAN QH, HU WX, SUN DY