abstract
The presence of nitrite, a prevalent contaminant in natural environments, presents a significant environmental and human health concern. Hence, it is imperative to develop a sensor with the ability to quantitatively detect nitrite. This study focuses on the design and development of i) probe 1: tilted fiber Bragg gratings (TFBGs) and ii) probe 2: fiber optic tip-based plasmonic sensors utilizing ion-imprinted polymers. The concentration of nitrite was assessed at various levels using both sensing configurations. The outcomes indicated that the TFBGs-based sensor exhibited a sensitivity and limit of detection (LOD) of 0.469 nm/ln(mu g/mL) and 0.142 mu g/mL in the linear detection range of 0.5-50 mu g/mL. The fiber optic tip-based sensor exhibited a sensitivity and LOD of 1.16 nm/ln (mu g/mL) and 0.176 mu g/mL within the 1-50 mu g/mL linear detection range. The obtained sensing results reveal that the sensors presented in this study are able to accurately detect nitrite at various concentrations in a quantitative manner. Moreover, an assessment was conducted to examine the selectivity and reusability of the sensor individually, yielding satisfactory results.
keywords
FLUORESCENT SENSOR; RESONANCE SENSORS
subject category
Biotechnology & Applied Microbiology; Chemistry; Electrochemistry; Science & Technology - Other Topics; Instruments & Instrumentation
authors
Liu, XC; Singh, R; Zhang, BY; Caucheteur, C; Santos, N; Kumar, S; Nedoma, J; Marques, C
our authors
Carlos Marques
Assistant ProfessorProjects
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
acknowledgements
Double-Hundred Talent Plan of Shandong Province, China; Special Construction Project Fund for Shandong Province Taishan Mountain Scholars; Liaocheng University (318052341) ; Fundacao para a Ciencia e a Tecnologia (CEECIND/00034/2018 and 2022.04595.CEECIND) ; Fundacao para a Ciencia e a Tecnologia/Ministerio da Educacao e Ciencia (PTDC/EEI-EEE/0415/2021, LA/P/0006/2020, UIDB/50011/2020, UIDP/50011/2020, LA/P/0037/2020, UIDB/50025/2020, UIDP/50025/2020) ; European Union under the REFRESH - Research Excellence For REgion Sustainability and Hightech Industries project number CZ.10.03.01/00/22_003/0000048 via the Operational Programme Just Transition; Ministry of Education, Youth, and Sports of the Czech Republic conducted by the VSB-Technical University of Ostrava, under grants no SP 2024/059 and SP2024/081.