Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Cadmium-ion detection: a comparative study for a SnO2, MoS2, SnO2/MoS2, SnO2-MoS2 sensing membrane combination with a fiber-optic Mach–Zehnder interferometer

Not Accessible

Your library or personal account may give you access

Abstract

A novel fiber-optic Mach–Zehnder interferometer based on ${{\rm SnO}_2}$, ${{\rm MoS}_2}$, ${{\rm SnO}_2}/{{\rm MoS}_2}$, and ${{\rm SnO}_2} {-} {{\rm MoS}_2}$ sensing film for cadmium-ion (${{\rm Cd}^{2 +}}$) detection is proposed and fabricated. The photonic-crystal fiber (PCF) is sandwiched between the no-core-fiber-1 (NCF1) and no-core-fiber-2 (NCF2), forming the Mach–Zehnder interferometer with the NCF1-PCF-NCF2 structure, which is regarded as the sensing unit. The ${{\rm SnO}_2}$, ${{\rm MoS}_2}$, ${{\rm SnO}_2}/{{\rm MoS}_2}$, and ${{\rm SnO}_2} {-} {{\rm MoS}_2}$ sensing films are, respectively, coated on the surface of two NCFs’ claddings. The comparative experiment results of the sensors with four membranes (${{\rm SnO}_2}$, ${{\rm MoS}_2}$, ${{\rm SnO}_2}/{{\rm MoS}_2}$, ${{\rm SnO}_2} {-} {{\rm MoS}_2}$) show that the sensors have good sensing performance for ${{\rm Cd}^{2 +}}$ in the concentration range of 0–100 µM. When these sensing films adsorbed ${{\rm Cd}^{2 +}}$, the monitoring wavelength shows blueshift of 0.6931 nm, 1.0252 nm, 1.9505 nm, respectively, and redshift of 3.0258 nm, and the sensitivities are 6.931 pm/µM, 10.252 pm/µM, 19.505 pm/µM, and 30.258 pm/µM, respectively. The sensor with ${{\rm SnO}_2} {-} {{\rm MoS}_2}$ bilayer film exhibits the optimal response to ${{\rm Cd}^{2 +}}$ with excellent selectivity and stability. The proposed sensor has the advantages of simple structure, easy fabrication, small size, etc., having potential application in the monitoring of ${{\rm Cd}^{2 +}}$ in aqueous solution.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Fiber optic evanescent wave humidity sensor based on SiO2/TiO2 bilayer films

Xixi Huang, Min Lai, Ziming Zhao, Yang Yang, Jinze Li, Huatang Song, Jixiang He, Yan Ma, and Bo Liu
Appl. Opt. 60(8) 2158-2165 (2021)

Tapered Mach–Zehnder interferometer based on PbS quantum dots modified by polymers for copper ion sensing

Yuyang Yan, Meiduan Fan, Shuang Zhou, Xiaolan Sun, Longfei Ma, Ruoyu Li, and Alan R. Kost
Appl. Opt. 60(16) 4807-4813 (2021)

Two-dimensional MoS2 2H, 1T, and 1T crystalline phases with incorporated adatoms: theoretical investigation of electronic and optical properties

Faisal Mehmood, Ruth Pachter, Tyson C. Back, John J. Boeckl, Robert T. Busch, and Peter R. Stevenson
Appl. Opt. 60(25) G232-G242 (2021)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved