Engineering upconverting core–shell nano-probe for spectral responsive fluid velocimetry  

作　　者：Hai Huang Shaoxiong Wang Runyu Chen Nianfeng Zhang Hu-Rong Yao Yuanhui Zheng Feng Huang Daqin Chen 

机构地区：[1]College of Physics and Energy,Fujian Normal University,Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials,Fuzhou 350117,China [2]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information,Fuzhou 350116,China [3]Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering,Fuzhou 350117,China [4]Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage,Fuzhou 350117,China [5]College of Chemistry,Fuzhou University,Fuzhou 350116,China

出　　处：《Nano Research》2023年第1期1212-1219,共8页纳米研究（英文版）

基　　金：This research was supported by National Natural Science Foundation of China(Nos.12074068,51972060,22103013,and 52102159);Fujian Science&Technology Innovation Laboratory for Optoelectronic Information(No.2021ZZ126);Natural Science Foundation of Fujian Province(Nos.2021J06021,2021J01184,2021J01187,and 2020J02017).

摘　　要：Particle velocimetry based on the temporal feature of upconversion luminescent nanocrystals is a newly-raising fluid velocimetry.Exploiting the availability to low flow rate fluid and exempting redundance external calibration(achieving once calibration for all)are highly expected and challenging.Herein,an engineered core–shell nano-probe,NaYF4:Yb/Ho/Ce@NaGdF4,was proposed,in which the Ce3+ions were utilized to manipulate the upconversion dynamic of Ho3+.Through optimization,a superior sensitive against low-speed flow is achieved,and the external calibrations before each operation can be avoided.Application demonstrations were conducted on a fluid circulation system with controllable flow rate.The fluid velocity was monitored successfully,no matter it is permanent,or cyclically variating(imitating the in vivo arterial blood).Moreover,this velocimetric route is competent in spatial scanning for handling the spatially inhomogeneous velocity field.Such sensing nanomaterial and fluid velocimetric method exhibit promising application potential in human blood velocimetry,industrial control,or environmental monitoring.

关 键 词：core-shell nanocrystals UPCONVERSION temporal dynamic fluid velocimetry 

分 类 号：TB383[一般工业技术—材料科学与工程]