Carbon Dots as A Sensitive Fluorescence Probe forRock Cracks Detection

As an environmentally friendly substance with strong fluorescence and penetration properties, carbon dots can be used as an auxiliary mean to study how cracks are generated and expanded in the rock. The carbon dots can adapt to different temperatures and PH environment in the process of detecting rock cracks. Based on the theoretical analysis of FTIR and XPS, it proved that carbon dots cannot react with rock thus the damage of rock properties could avoid effectively. Furthermore, it turns out that carbon dots can be stably adhered on the surface of rock, which is conducive to the detection of rock cracks. The feasibility of the proposed point of view was proved by simulation experiment. Finally, the fluorescence lifetime and fluorescence penetration of carbon dots method were discussed and need further investigation.