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Biosensors (Basel)
2023 Dec 22;141:. doi: 10.3390/bios14010008.
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Asterias forbesi-Inspired SERS Substrates for Wide-Range Detection of Uric Acid.
Park H
,
Chai K
,
Kim W
,
Park J
,
Lee W
,
Park J
.
Abstract
Uric acid (UA), the final metabolite of purine, is primarily excreted through urine to maintain an appropriate concentration in the bloodstream. However, any malfunction in this process can lead to complications due to either deficiency or excess amount of UA. Hence, the development of a sensor platform with a wide-range detection is crucial. To realize this, we fabricated a surface-enhanced Raman spectroscopy (SERS) substrate inspired by a type of starfish with numerous protrusions, Asterias forbesi. The Asterias forbesi-inspired SERS (AF-SERS) substrate utilized an Au@Ag nanostructure and gold nanoparticles to mimic the leg and protrusion morphology of the starfish. This substrate exhibited excellent Raman performance due to numerous hotspots, demonstrating outstanding stability, reproducibility, and repeatability. In laboratory settings, we successfully detected UA down to a concentration of 1.16 nM (limit of detection) and demonstrated selectivity against various metabolites. In the experiments designed for real-world application, the AF-SERS substrate detected a broad range of UA concentrations, covering deficiencies and excesses, in both serum and urine samples. These results underscore the potential of the developed AF-SERS substrate as a practical detection platform for UA in real-world applications.
NRF-2023R1A2C2004964 National Research Foundation of Korea, NRF-2022R1I1A1A01066196 National Research Foundation of Korea, NRF-2022R1A2C4001990 National Research Foundation of Korea, RS-2023-00222737 National Research Foundation of Korea
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