Li X, Li B, Lei J, Bets KV, Sang X, Okogbue E, Liu Y, Unocic RR, Yakobson BI, Hone J, Harutyunyan AR. Nickel particle-enabled width-controlled growth of bilayer molybdenum disulfide nanoribbons. Sci Adv. 2021;7(50):eabk1892. https://doi.org/10.1126/sciadv.abk1892.
该文报道了由镍纳米颗粒实现的双层MoS2 NRs的合成，镍纳米颗粒的直径控制着色带的宽度。利用AES对二维材料MoS2进行了元素Mapping分析，得出了在双层MoS2带状生长中尖端镍颗粒发挥了关键作用。
FIG. 2. Growth mechanism study. (A) AES elemental mapping of Mo, Ni, Na, and S, within the terminal area of a bilayer MoS2 ribbon grown for only 30 s. SEI stands for secondary electron image. (B) AES elemental mapping of Mo, Ni, and S, within the terminal area of a bilayer MoS2 NR. The Mo and S detected from the nanoparticle area are originated from MoS2 multilayers precipitated beneath the Ni particle (see also fig. S7). (C) AES elemental mapping of a single particle deposited from a mixture of MoO2 + Ni + NaBr under moisturized Ar flow.
