Based on in situ generation of CdS quantum dots(QDs)and surface plasmon resonance(SPR)enhancement between CdS QDs and Ag nanoparticles(NPs),an innovative paper-supported photoelectrochemical(PEC)sensing platform was c...Based on in situ generation of CdS quantum dots(QDs)and surface plasmon resonance(SPR)enhancement between CdS QDs and Ag nanoparticles(NPs),an innovative paper-supported photoelectrochemical(PEC)sensing platform was constructed for real-time intracellular H_(2)S detection.SiO_(2)shell was coated on the Ag NPs to improve the stability of Ag NPs.H_(2)S was used to trigger the formation of CdS QDs,thereby inducing an improvement of photocurrent response.CdS QDs grown on the Ag@SiO_(2)core-shell NPs worked efficiently to absorb visible light.The resulting CdS QDs-Ag@SiO_(2)core-shell NPs exhibit improved PEC behavior,which was attributed to the surface plasmon-resonance effect of Ag NPs.Meanwhile,the separation of cell binding from the photoelectrode would eliminate the commonly existing affection dur-ing the biorecognition processes.This novel SPR-enhanced PEC sensing platform not only achieved satisfactory analysis results toward H_(2)S,but also showed excellent sensitivity,selectivity,low cost,and portable features.The strategy of the SPR through the in situ generation of semiconductor nanoparticles on the surface of noble metal semiconductor paves way for the improvements of PEC analytical performance.展开更多
基金the program for Taishan Scholar of Shandong Province(ts201712048)National Natural Science Foundation of China(21874055,51632003)Supports from the 111 Project of International Corporation on Advanced Cement-based Materials(No.D17001)is greatly appreciated.
文摘Based on in situ generation of CdS quantum dots(QDs)and surface plasmon resonance(SPR)enhancement between CdS QDs and Ag nanoparticles(NPs),an innovative paper-supported photoelectrochemical(PEC)sensing platform was constructed for real-time intracellular H_(2)S detection.SiO_(2)shell was coated on the Ag NPs to improve the stability of Ag NPs.H_(2)S was used to trigger the formation of CdS QDs,thereby inducing an improvement of photocurrent response.CdS QDs grown on the Ag@SiO_(2)core-shell NPs worked efficiently to absorb visible light.The resulting CdS QDs-Ag@SiO_(2)core-shell NPs exhibit improved PEC behavior,which was attributed to the surface plasmon-resonance effect of Ag NPs.Meanwhile,the separation of cell binding from the photoelectrode would eliminate the commonly existing affection dur-ing the biorecognition processes.This novel SPR-enhanced PEC sensing platform not only achieved satisfactory analysis results toward H_(2)S,but also showed excellent sensitivity,selectivity,low cost,and portable features.The strategy of the SPR through the in situ generation of semiconductor nanoparticles on the surface of noble metal semiconductor paves way for the improvements of PEC analytical performance.
