Ultrathin Graphdiyne Nanowires with Diameters below 3 nm: Synthesis, Photoelectric Effect, and Enhanced Raman Sensing

Due to the intrinsic layered structure, graphdiyne (GDY) strongly tends to form 2D materials, therefore, most of the current research are based on GDY 2D structures. Up to now, the synthesis of its ultrathin nanowires with a high aspect ratio has not been reported. Here, the ultrathin GDY nanowires with diameters below 3 nm are reported for the first time by a two-phase interface synthesis method, which has excellent crystallinity and an aspect ratio of more than 2500. Evidence shows that the GDY ultrathin nanowires are formed by the oriented-attachment mechanism of nanoparticles. The GDY ultrathin nanowires exhibit a significant quantum confinement effect, enhanced photoelectric effect, and promising applications in surface-enhanced Raman sensing.

Automated summary

Due to its layered structure, graphdiyne has a strong tendency to form 2D materials, and most of the current research is based on GDY 2D structures. However, the synthesis of ultrathin nanowires with a high aspect ratio has not been reported. In this study, ultrathin GDY nanowires with diameters below 3 nm were successfully synthesized using a two-phase interface method, exhibiting excellent crystallinity and an aspect ratio of over 2500. The formation of GDY ultrathin nanowires is believed to follow the oriented-attachment mechanism of nanoparticles. These nanowires demonstrate significant quantum confinement effect, enhanced photoelectric effect, and promising applications in surface-enhanced Raman sensing.