Heterostructure light-emitting diodes(LEDs)were fabricated by growing ZnO nanorods and undoped ZnO films on p-GaN templates.The heterojunction showed a diode-like I–V characteristic and emitted electroluminescence(EL)peaks at 383 nm,402 nm,438 nm,and 507 nm under forward bias.Since the electrons from ZnO nanorods and the holes from p-GaN could be injected into ZnO films with a relatively low carrier concentration and mobility,the radiative recombination was mainly confined in the ZnO film region.As a result,the ZnO nanorods/i-ZnO/p-GaN light emitting diode exhibits a stronger ultraviolet–violet emission peak.
Objective To iavestigate the influence of two disinfectants methods on disintection efficiency and model precision of dental impression.Methods Alginate impressions,alginate and agar complex impressions and silicon rubber impressions were made according to a unified standard.Chlorinous disinfectant solution and acidic oxidative potential water were used to disinfect the infected impressions.The influence of two disinfectants on disinfection efficiency and model precision of dental impression was compared.Results Two disinfectants for 30 minutes had significant disinfection effect on these three kinds of impressions.The effective rate reached 99.48％.Chlorinous disinfectant solution bad no significant influence on the model precision of alginate impressions and silicon rubber impressions,but had significant influence on the model precision of alginate and agar complex impressions.Acidic oxidative potential water did not influence the model precision of the three dental impressions.Conclusions Acidic oxidative potential water can be used to disinfect the three dental impressions.Chlorinous disinfectant solution can be used to disinfect alginate impressions and silicon rubber impressions,but cannot be used to disinfect agar complex impressions.
Key words:
Dental impression disinfect; Chlorinous disinfectant solution; Acidic oxidative potential water; Model precision; Disinfection effect
