Application of ZnO Nanorods Based Whispering Gallery Mode Resonator in Optical Immunosensors

Tereshchenko, Alla; Yazdi, Gholamreza; Конуп, І. П.; Смынтына, В. А.; Khranovskyy, Volodymyr; Yakimova, Rositsa; Ramanavičius, Arūnas

doi:10.1016/j.colsurfb.2020.110999

Cited by 29 publications

(14 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper, the evolution and quality of the resonant peaks in relation to the size and shape of the resonant cavity and to the reflectance efficiency of the facets are described. It was shown that doing measurements that mapped the evolution of the optical resonant modes along the length of the structure will helped to identify the regions with resonant cavities that had better performance for applications such as lasing [2,3,13,14], sensors [12], immunosensors [15], or optical filters [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Whispering Gallery Modes in Li-Doped ZnO Hexagonal Micro- and Nanostructures

et al. 2020

View full text Add to dashboard Cite

The formation of optical cavities in Li-doped ZnO nanostructures was investigated. By means of the vapor–solid method, long micro- and nanostructures with a hexagonal cross-section were grown. These morphologies were favorable for Fabry-Pérot and whispering gallery modes to appear. A variety of structures with different sections was studied using µ-photoluminescence in both the transverse electric (TE) and transverse magnetic (TM) polarizations, showing well-pronounced optical resonant modes. The results showed a dominance of whispering gallery modes that were in good agreement with the calculated refractive index. The quality factor (Q) and finesse (F) were estimated, which demonstrated the quality of Li:ZnO structures as optical cavities.

show abstract

Section: Introductionmentioning

confidence: 99%

Evolution of Whispering Gallery Modes in Li-Doped ZnO Hexagonal Micro- and Nanostructures

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Consequently, the structure and symmetry of PbI 2 can be considered to maintain undamaged during the process of PL enhancement. According to previous works, [ 38,39 ] ZnO nanowire with hexagonal cross section is a natural whispering‐gallery‐mode (WGM) microcavity and could strengthen the light–matter interactions through the total internal reflection mechanism. Figure 4d shows the schematic illustration of the WGM light path generated inside the ZnO nanowire.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Photostability and Photoluminescence of PbI₂ via Constructing Type‐I Heterostructure with ZnO

Liu

et al. 2021

Advanced Photonics Research

View full text Add to dashboard Cite

Improving the stability of lead iodide (PbI2), especially photostability, is in crucial demand for the realization of application‐level optoelectronic devices. In this regard, deposition of organic polymers on PbI2 as a protective layer is a common strategy to improve its stability, but polymers with low thermal conductivity generally cannot produce the desired effect. Herein, a novel strategy is proposed for improving the photostability of PbI2 at different excitation wavelengths, including 320, 405, and 532 nm, via constructing type‐I heterostructure with ZnO with high thermal conductivity. In addition, due to the type‐I band alignment between PbI2 and ZnO, the photogenerated carriers in ZnO can be transferred to PbI2, resulting in a nearly eightfold photoluminescence enhancement of PbI2 under 320 nm laser excitation. The ZnO as a protective layer forming type‐I heterostructure is evidenced as a feasible strategy for enhancing the photostability and photoluminescence of PbI2, facilitating the development of practical applications.

show abstract

“…Sð%Þ ¼ jI m À I ab j I ab (10) where I m : signal intensity at the appearance of analytes molecules, I ab : signal intensity at the absence of analytes molecules. The values of sensitivity (%) of ZnO and xBi/Zn-doped optical sensor toward the EDA detection was found to be 1.078 and 3.843.…”

Section: Sensitivitymentioning

confidence: 99%

“…The growth of ZnO nanorods was developed over Si wafer that helps to generate the quasi‐whispering gallery modes and these modes help to get better interaction between target analyte molecules with sensing head. [ 10 ] ZnO has higher RI than silica fiber (≈1.45); therefore, the maximum evanescent field produced into the modified optical fiber could be feasibly coupled with ZnO thin‐film layer. Indeed, it improves the interaction between the evanescent field with analytes molecules; as a result, it improves the sensing performance of the sensor.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Bi‐Doped ZnO Thin Film over Optical Fiber and Their Application as Detection of Ethylenediamine in an Aqueous Medium Based on the Evanescent Field Technique

Singh

Samanta

Dhar

et al. 2020

Physica Status Solidi (a)

View full text Add to dashboard Cite

Synthesis of pure ZnO and bismuth-doped ZnO (xBi/Zn) (x ¼ 6 wt%) thin-film based optical fiber sensor and their material/optical characterization such as Brunauer-Emmett-Teller (BET) analysis, field-emission scanning electron microscopy (FESEM), and energy dispersive X-ray (EDX) analysis is reported. As-prepared material such as xBi/Zn is deposited over the optical fiber, and optimum clad thickness in the range of 2-5 μm is achieved through MATLAB simulation to enhance the feasible evanescent field interaction with gas analyte molecules. The modal field analysis of the sensing probe before and after the deposition of xBi/Zn is also studied using COMSOL Multiphysics Modeling software and find strong light propagation into the LP 04 mode. The sensing probes are tested in different chemicals and ethylenediamine (EDA) is found to be the most suitable candidate in the concentration range of 100-800 ppm. The response time of the ZnO and xBi/Zn-doped thin-film-based optical sensor is found to be 20 and 15 s, whereas the corresponding sensitivity (%) is 1.078 and 3.483, respectively. The repeatability test of the sensor is also carried out which reveals good response stability.

show abstract

Application of ZnO Nanorods Based Whispering Gallery Mode Resonator in Optical Immunosensors

Cited by 29 publications

References 27 publications

Evolution of Whispering Gallery Modes in Li-Doped ZnO Hexagonal Micro- and Nanostructures

Evolution of Whispering Gallery Modes in Li-Doped ZnO Hexagonal Micro- and Nanostructures

Enhanced Photostability and Photoluminescence of PbI₂ via Constructing Type‐I Heterostructure with ZnO

Preparation of Bi‐Doped ZnO Thin Film over Optical Fiber and Their Application as Detection of Ethylenediamine in an Aqueous Medium Based on the Evanescent Field Technique

Contact Info

Product

Resources

About

Application of ZnO Nanorods Based Whispering Gallery Mode Resonator in Optical Immunosensors

Cited by 29 publications

References 27 publications

Evolution of Whispering Gallery Modes in Li-Doped ZnO Hexagonal Micro- and Nanostructures

Evolution of Whispering Gallery Modes in Li-Doped ZnO Hexagonal Micro- and Nanostructures

Enhanced Photostability and Photoluminescence of PbI2 via Constructing Type‐I Heterostructure with ZnO

Preparation of Bi‐Doped ZnO Thin Film over Optical Fiber and Their Application as Detection of Ethylenediamine in an Aqueous Medium Based on the Evanescent Field Technique

Contact Info

Product

Resources

About

Enhanced Photostability and Photoluminescence of PbI₂ via Constructing Type‐I Heterostructure with ZnO