“…Low-dimensional nanomaterials have attracted considerable attention for the great potential in future practical applications . One-dimensional (1D) nanowires with high aspect ratios can be applied as an ideal platform for the conduction of electrons and photons, which provides possibilities for revolutionary photoelectronic devices including photodetectors, memristors, optoelectronic synapses, inverters, and light-emitting diodes (LEDs). , Especially, 1D photodetectors ground on traditional semiconductors (such as silicon, germanium, III–V A, II–VI A, and oxides) have been widely explored, − which have promising applications in image sensors, artificial vision, optical communication, environmental monitoring, analytical applications, gas sensing, etc. ,, Very recently, 1D van der Waals (vdW) materials have begun to sprout thanks to their intriguing properties . Compared with traditional semiconductors, photodetectors ground on 1D vdW materials demonstrate advantages in the following aspects: (I) The dangling bonds-free surface of 1D vdW materials is insensitive to adsorbates, surface contaminations, and lattice defects, which is beneficial for fabricating photodetectors with ultrahigh speed and highly sensitive photoresponse.…”