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| Plasmon-enhanced upconversion luminescence and application of molecular detection |
| Author Name | Affiliation | E-mail | | YANG Yang | College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao, Shandong 266071, China
Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Ningbo, Zhejiang 315211, China
Ningbo Sino-Ukrainian New Materials Industrial Technologies Institute Co., Ltd., Ningbo, Zhejiang 315000, China | | | LI Pengcheng | Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Ningbo, Zhejiang 315211, China | lee040721@163.com | | SHU Zhan | Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Ningbo, Zhejiang 315211, China | | | TU Nengrong | Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Ningbo, Zhejiang 315211, China | | | WANG Zonghua | College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao, Shandong 266071, China | 13853219173@126.com |
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| Abstract: Fluorescence molecular detection exhibits limited development in detection applications due to generally low sensitivity and narrow detection range. The heavily doped semiconductor nanostructures Cu2-xS with surface plasmon resonance effect and typical rare-earth-doped upconversion luminescent nanoparticles NaYF4:Yb,Er were prepared, and further Cu2-xS/NaYF4:Yb,Er film substrates were obtained by three-phase interfacial self-assembly method. Combined with finite element method simulations, the local electric field distributions around Cu2-xS were calculated for different placement situations. The plasmon-coupling effect generated between Cu2-xS nanodisks was investigated on the upconversion luminescence performance and the Raman signals. Based on the intense upconversion luminescence caused by the excellent synergetic localized surface plasmon resonance effect, a dual detection method of qualitative before quantitative detection of Rhodamine B using surface-enhanced Raman scattering signal monitoring and fluorescence sensing was established. The results show that the coupling of the Cu2-xS plasmonic layer with the NaYF4:Yb, Er luminescent layer not only enables three orders of magnitude improvement of upconversion emission, but also achieves the detection limit of 10-7 mol·L-1 for molecular detection and obtains a broad linear response from 10-3 to 10-7 mol·L-1, and finally realizes the qualitative and quantitative bifunctionality of highsensitivity accurate detection. |
| Keywords: Cu2-xS nanodisk plasmon resonance molecular detection |
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| YANG Yang,LI Pengcheng,SHU Zhan,TU Nengrong,WANG Zonghua.Plasmon-enhanced upconversion luminescence and application of molecular detection[J].Chinese Journal of Inorganic Chemistry,2024,40(5):877-884. |
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