Creating gold nanoprisms directly on quartz crystal microbalance electrodes for mercury vapor sensing

摘要: A novel electrochemical route is used to form highly {111}-oriented and size-controlled Au nanoprisms directly onto the electrodes of quartz crystal microbalances (QCMs) which are subsequently as mercury vapor sensors. The nanoprism loaded QCM sensors exhibited excellent response–concentration linearity with a response enhancement up ~ 800% over non-modified sensor at an operating temperature 28 °C. increased surface area atomic-scale features (step/defect sites) introduced during growth thought play significant role in enhancing sensing properties toward Hg vapor. shown have capabilities concentration range 0.123–1.27 ppmv (1.02–10.55 mg m − 3), detection limit 2.4 ppbv (0.02 mg m 3) when 28 °C, 17 ppbv (0.15 mg m 89 °C, making them potentially useful for air monitoring applications or efficiency emission control systems industries such mining waste incineration. developed reversible behavior (sensor recovery) within 1 h periods, crucially were also observed high selectivity presence ethanol, ammonia humidity, long-term stability 33 day period.