Laser & Optoelectronics Progress, Volume. 62, Issue 17, 1730003(2025)
Flexible Superhydrophobic Film Combined with LIBS for Highly Sensitive and Rapid Analysis of Multiple Rare Earth Elements in Aqueous Solutions
Fig. 1. Schematic diagrams and characterizations of FSF with hydrophilic arrays based on micron-sized pockets. (a) Glass substrate and the corresponding SEM image; (b) PET substrate film with micron-sized roughness adhered onto the slide and the corresponding SEM image (WCA is 109°); (c) superhydrophobic nanoparticles coated on the PET substrate film and the corresponding SEM image (WCA is 160°); (d) hydrophilic arrays obtained by removing part of the hydrophobic layer and the image of the hydrophilic dots
Fig. 2. Schematic diagram of FSF-LIBS for highly sensitive and rapid analysis of REEs in aqueous solutions
Fig. 3. Schematic of the principle of hydrophobic surface formation based on micron-sized pockets
Fig. 4. Demonstrations of FSF's fixed behavior and enrichment performance. (a) Behavior of water droplets held at the hydrophilic dots of FSF (tilt angle of slide is approximately 18°); (b) enrichment behavior of AuNPs on FSF
Fig. 5. Self-cleaning performance evaluation of FSF. (a) Schematic of self-cleaning performance of FSF contaminated by CuSO4 powder; (b) LIBS emission spectra of FSF and control (slide) after contamination-cleaning treatment, as well as the blank group (FSF without contamination); (c) intensity of the characteristic spectral line of Cu I 324.75 nm from the above three groups
Fig. 6. Delay time optimization. (a) Dynamic curves of SNR with the increased delay time; (b) spectra at delay time of 0.5 μs; (c) spectra at delay time of 2.0 μs
Fig. 7. Dynamic curves of signal intensity with the increased ablation number. (a) Signal intensity in Sc II 361.38 nm; (b) signal intensity in Yb II 369.40 nm
Fig. 8. Calibration curves of performance of FSF-LIBS for detection of REEs in aqueous solutions. (a) Yb II 369.40 nm; (b) Sc II 361.38 nm; (c) Eu II 420.50 nm; (d) Y II 371.03 nm; (e) Dy II 353.17 nm; (f) Nd II 402.17 nm
|
|
|
Get Citation
Copy Citation Text
Shijie Li, Mengfan Wu, Chuyan Zhang, Lingwei Zeng, Yu Rao, Guanghui Niu, Xingliang He, Weiheng Kong, Yixiang Duan. Flexible Superhydrophobic Film Combined with LIBS for Highly Sensitive and Rapid Analysis of Multiple Rare Earth Elements in Aqueous Solutions[J]. Laser & Optoelectronics Progress, 2025, 62(17): 1730003
Category: Spectroscopy
Received: Jan. 6, 2025
Accepted: Feb. 26, 2025
Published Online: Sep. 12, 2025
The Author Email: Yixiang Duan (yduan@scu.edu.cn)
CSTR:32186.14.LOP250446