Universal method of selective detection of a wide range of pollutants in liquids using conductance quantization
The primary objective of research in modern sensor technologies is to develop innovative detection methods for the rapid analysis of complex molecular systems. The present work demonstrates that the quantum mechanism of selective detection, based on conductance quantization, can be effectively employed to create a universal method for detecting a broad spectrum of agents in liquid media, including heavy metals and organic solvents. The efficacy of this approach is illustrated through the use of quantum point-contact sensors, which utilize dendritic Yanson point contacts undergoing quantum transformations during the cyclic switchover effect. These sensors have proven capable of detecting copper, zinc, and lead ions in liquid media across a wide range of concentrations, including trace levels as low as a few parts per billion (ppb). Furthermore, they can identify organic solvents, as demonstrated with acetic acid. The use of innovative quantum detection principles paves the way for the development of a comprehensive array of next-generation devices, offering promising solutions for advanced environmental monitoring applications.