Inorganic luminescent nanocrystals(NCs)doped with main-group ns^(2)-metal ions have evoked tremendous interest in many technological fields owing to their superior optical properties.Herein,we report a new class of lu...Inorganic luminescent nanocrystals(NCs)doped with main-group ns^(2)-metal ions have evoked tremendous interest in many technological fields owing to their superior optical properties.Herein,we report a new class of luminescent nanoprobes based on 5s2-metal Sb3+-doped CaS NCs that are excitable by using a near ultraviolet light-emitting diode.The optical properties and excited-state dynamics of Sb3+in CaS NCs are comprehensively surveyed through temperature-dependent steady-state and transient photoluminescence(PL)spectroscopies.Owing to the strong electron-phonon coupling of Sb^(3+)in CaS NCs,Sb3+ions experience a dynamic Jahn-Taller distortion on the excited state,which results in bright green PL of Sb3+with a broad emission band,a large Stokes shift,and a high PL quantum yield up to 17.3%.By taking advantage of the intense PL of Sb^(3+),we show in proof-of-concept experiments the application of biotinylated CaS:Sb^(3+)NCs as sensitive luminescent nanoprobes for biotin receptor-targeted cancer cell imaging and zebrafish imaging with a high imaging contrast.These findings provide fundamental insights into the excited-state dynamics of Sb^(3+)in CaS NCs,thus laying a foundation for future design of novel and versatile luminescent nanoprobes via main-group ns2-metal doping.展开更多
基金supported by the Science and Technology Cooperation Fund between Chinese and Australian Governments(No.2017YFE0132300)the Strategic Priority Research Program of the CAS(No.XDB20000000)+2 种基金the National Natural Science Foundation of China(Nos.11774345,12074379,21771185,21875250,and 11904365)the CAS/SAFEA International Partnership Program for Creative Research Teams,Natural Science Foundation of Fujian Province(No.202010037)Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(No.2021ZR125).
文摘Inorganic luminescent nanocrystals(NCs)doped with main-group ns^(2)-metal ions have evoked tremendous interest in many technological fields owing to their superior optical properties.Herein,we report a new class of luminescent nanoprobes based on 5s2-metal Sb3+-doped CaS NCs that are excitable by using a near ultraviolet light-emitting diode.The optical properties and excited-state dynamics of Sb3+in CaS NCs are comprehensively surveyed through temperature-dependent steady-state and transient photoluminescence(PL)spectroscopies.Owing to the strong electron-phonon coupling of Sb^(3+)in CaS NCs,Sb3+ions experience a dynamic Jahn-Taller distortion on the excited state,which results in bright green PL of Sb3+with a broad emission band,a large Stokes shift,and a high PL quantum yield up to 17.3%.By taking advantage of the intense PL of Sb^(3+),we show in proof-of-concept experiments the application of biotinylated CaS:Sb^(3+)NCs as sensitive luminescent nanoprobes for biotin receptor-targeted cancer cell imaging and zebrafish imaging with a high imaging contrast.These findings provide fundamental insights into the excited-state dynamics of Sb^(3+)in CaS NCs,thus laying a foundation for future design of novel and versatile luminescent nanoprobes via main-group ns2-metal doping.
