Mixed-dimensional (2D + nD, n = 0, 1, and 3) heterostructures opened up a new avenue for fundamental physics studies and applied nanodevice designs. Herein, a novel type-II staggered band alignment CuFe2O4/MoS2 mixed-dimensional heterostructures (MHs) that present a distinct enhanced (20-28%) acetone gas sensing response compared with pure CuFe2O4 nanotubes are reported. Based on the structural characterizations and DFT calculation results, the tentative mechanism for the improvement of gas sensing performance of the CuFe2O4/MoS2 MHs can be attributed to the synergic effect of type-II band alignment and the MoS2 active sites.

中文翻译：

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具有改善的气敏响应的CuFe2O4 / MoS2混合尺寸异质结构。

混合尺寸（2D + nD，n = 0、1和3）异质结构为基础物理研究和应用纳米器件设计开辟了新途径。在本文中，报告了一种新颖的II型交错带取向CuFe2O4 / MoS2混合尺寸异质结构（MHs），与纯CuFe2O4纳米管相比，它表现出明显增强的（20-28％）丙酮气敏响应。根据结构特征和DFT计算结果，CuFe2O4 / MoS2 MHs气敏性能提高的初步机理可归因于II型能带排列和MoS2活性位点的协同作用。