As a member of the two-dimensional transition metal dichalcogenide family, rhenium disulfide (ReS) is a highly competitive favorite in the field of photoelectric sensors. Nevertheless, the rapid recombination of electron-hole pairs and poor electronic transmission capacity of pure ReS limit its wider applications. As a new attempt to optimize its inherent structure and challenge its competency boundary, in this work, a bimetallic co-chamber feeding atomic layer deposition with a precise dose regulation strategy has been used to fabricate ReS nanotubes (ReS-NTs) and MoS-ReS heterojunction nanotubes (MoS-ReS-HNTs) based on the anodic aluminum oxide template sacrifice method for the first time. These obtained NTs have at least two advantages: they have a controllable diameter (40-500 nm), definite wall thickness (1 layer to 10 layers), and desirable Mo-to-Re ratio (0 to 90%), and their electron-transfer capacity and photocurrent response can be effectively enhanced by the incorporated Mo atoms. Further experiments indicated that MoS-ReS-HNTs with a real Mo-to-Re ratio of 31.0% exhibits the best photocurrent response performance, by which the ultrasensitive detection of cancer-related miRNA-155 with a linear range of 10 aM to 1 nM and a detection limit of 1.8 aM is achieved.
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