Ultrasensitive Detection of Trace Silver Ions Using MoS42−-Intercalated LDH Nanosheets Enhanced SPR Sensor
Year: 2024
Type: article
Abstract: The widespread use of silver raises concerns about environmental and health risks, necessitating highly sensitive detection methods for trace silver ions (Ag+). Surface plasmon resonance (SPR) sensors offer benefits like label-free detection and rapid response, but their sensitivity for Ag+ detection is limited due to weak ion adsorption. Here, we developed an SPR sensor with MoS42−-intercalated NiAl-layered double hydroxide (LDH) as the adsorption layer of Ag+ to enhance detection sensitivity. Our sensor achieves a sensitivity of 254.75 nm/μg/L and detects Ag+ at a low concentration of 2.8 pM, outperforming various existing sensors. It also shows excellent repeatability, long-term stability, and selectivity, proving effective in real-world environmental samples. This work advances high-performance SPR sensors for heavy metal ion detection.
Source: Sensors
DOI: 10.3390/s24185973
Authors: Linlong Tang, Guilian Lan, Penglei Ma, Yu Jia, Xiaojian Zhang, Peng Luo, Wei Wei
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,955
OpenAlex ID: W4402792186