Ultra-long-range hot electron tunneling:Plasmonic nanoengineering enhanced self-powered photoelectrochemical immunoassayOA
Constructing ultra-long-range nanogaps for enabling significant plasmonic tunneling phenomena represents a long-standing goal of the research on localized surface plasmon resonance effect.However,such electric fieldenhanced tunneling effect is frequently limited by the gap size and band structure configurations between plasmonic nanoparticles and semiconductors.Here,we designed six distinct morphologies of gold nanoparticles and dual Z-scheme substrate with matchable tunneling barriers,which successfully achieved the ultrasensitive PEC immunoassay by utilizing bioconjugates as an ultra-long-range dielectric layer.First,Au stars demonstrated the optimal performances in both finite element method simulations and surface-enhanced Raman spectroscopy experiments among the six gold nanoparticles.Furthermore,the density functional theory calculations and experimental results revealed the dual Z-scheme heterojunction configuration(TiO_(2)@TpPa-2@CdS)as the most efficient substrate for facilitating ultra-long-range hot electron tunneling.The plasmonic tunneling enhanced immunoassay exhibited an ultrasensitive detection of carcinoembryonic antigen(CEA)with the limit of detection as low as 0.012 pg·mL^(-1).These results provide compelling evidence for ultra-long-range tunneling effect in plasmonic systems,thereby enabling more potential applications in plasmonic technology.
Tianxiang Hang;Fubin Pei;Ciyang Zhang;Ming Yang;Mingzhu Xia;Qingli Hao;Wu Lei
School of chemistry and chemical engineering,Nanjing University of Science and Technology,Nanjing 210094,China Key Laboratory for Soft Chemistry and Functional Materials,Ministry of Education,School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,ChinaSchool of chemistry and chemical engineering,Nanjing University of Science and Technology,Nanjing 210094,ChinaSchool of chemistry and chemical engineering,Nanjing University of Science and Technology,Nanjing 210094,ChinaSchool of chemistry and chemical engineering,Nanjing University of Science and Technology,Nanjing 210094,ChinaSchool of chemistry and chemical engineering,Nanjing University of Science and Technology,Nanjing 210094,ChinaSchool of chemistry and chemical engineering,Nanjing University of Science and Technology,Nanjing 210094,China Key Laboratory for Soft Chemistry and Functional Materials,Ministry of Education,School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,ChinaSchool of chemistry and chemical engineering,Nanjing University of Science and Technology,Nanjing 210094,China
数理科学
plasmonicultra-long-rangehot electron tunnelingphotoelectrochemical immunoassayZ-scheme
《Nano Research》 2026 (3)
P.979-989,11
the National Natural Science Foundation of China(Nos.51972173 and 51872140)。
评论