Stuides On Nanoprobe Based On Rare-earth Modified Carbon Dots Through Supramolecular Assembly

Carbon dots(CDots)have attracted considerable attention in the field of bio-imagining,multifunctional nanosensor,optical devices etc.Compared to traditional semiconductor quantum dots,CDots exerts better water solubility,lower toxicity and tunable fluorescence.However,bare carbon dots usually have limited functions.Hence,diverse surface groups can be readily introduced on CDots via various synthesis methodologies.Tremendous efforts have been devoted to modifying the CDots to achieve different applications.It has been reported that rare-earth compounds can exhibit unique spectroscopic characteristics and have been widely used as laser materials,optoelectronic devices and as fluorescence probes in immunoassays.Therefore,the combination of CDots and rare-earth compounds has been noticed currently with multifunctional,versatile and modulated properties.This system takes advantage of the unique spectroscopic characteristics of the Ln³⁺ions.Meanwhile,the CDots can be employed as the fluorescence interior reference to improve detection accuracy and sensitivity.In this article,we design a supramolecular assembly strategy for the facile fabrication of rare-earth compounds modified smart nanodevice.This methods often prevent inefficient reaction yields and complicated purification processes.Based on this elaborate supramolecular assembly,the nanodevice can be used as a fluorescent ratiometric probe for phosphates.Also,it provides an opportunity to be employed as a nano-logic gate with two output channels.This paper is divided into three parts:1.Firstly,the paper reviewed the research background of rare-earth compounds functionalized nanomaterial.2.We proposed an elaborate supramolecular assembly strategy for the facile fabrication of CDots-based smart nanodevice.The CDots can provide quaternary ammonium to precisely immobilize functional units via supramolecular interactions with excellent luminescent properties This system takes advantage of the unique spectroscopic characteristics of the Tb³⁺ions.Based on this elaborate supramolecular assembly,the nanodevice can be used as a fluorescent ratiometric probe for phosphates.Also it provides an opportunity to be employed as a nano-logic gate with two output channels.3.We ustilize this multifunctional carbon dots based nano probe in environmental applications.This nanoprobe can be used as the indicator of the phosphorous pesticide in environment.