2D atomic crystal molecular superlattices by soft plasma intercalation.
2D atomic crystal molecular superlattices by soft plasma intercalation.
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软等离子体插层二维原子晶体分子超晶格
DOI:
10.1038/s41467-020-19766-x
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发表时间:
2020-11-24
影响因子:
16.6
通讯作者:
Xiao S
中科院分区:
文献类型:
--
作者:
Zhang L;Nan H;Zhang X;Liang Q;Du A;Ni Z;Gu X;Ostrikov KK;Xiao S
Two-dimensional (2D) atomic crystal superlattices integrate diverse 2D layered materials enabling adjustable electronic and optical properties. However, tunability of the interlayer gap and interactions remain challenging. Here we report a solution based on soft oxygen plasma intercalation. 2D atomic crystal molecular superlattices (ACMSs) are produced by intercalating O2+ ions into the interlayer space using the plasma electric field. Stable molecular oxygen layer is formed by van der Waals interactions with adjacent transition metal dichalcogenide (TMD) monolayers. The resulting interlayer gap expansion can effectively isolate TMD monolayers and impart exotic properties to homo-(MoS2[O2]x) and hetero-(MoS2[O2]x/WS2[O2]x) stacked ACMSs beyond typical capacities of monolayer TMDs, such as 100 times stronger photoluminescence and 100 times higher photocurrent. Our potentially universal approach to tune interlayer stacking and interactions in 2D ACMSs may lead to exotic superlattice properties intrinsic to monolayer materials such as direct bandgap pursued for future optoelectronics. Two-dimensional (2D) atomic crystal superlattices offer technological opportunities beyond the reach of existing materials. Here, the authors produce 2D atomic crystal molecular superlattices by intercalating O2 molecules into the interlayer space of 2D materials using a soft plasma strategy.
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通讯作者:
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