Bacteria detection in a Kretschmann geometry flow cell at a plasmon-enhanced interface with spectroscopic ellipsometer

Zangenehzadeh, Soraya; Agócs, Emil; Jivani, Harsh; Könemund, Lea; Neumann, Laurie; Hirschberg, Felix; Herdan, Svenja; Biedendieck, Rebekka; Jahn, Dieter; Roth, Bernhard W.; Johannes, Hans‐Hermann; Kowalsky, Wolfgang

doi:10.1016/j.tsf.2022.139583

Cited by 7 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was shown that N-methyl mesoporphyrin IX interacts more strongly with a parallel G4 structure than with an antiparallel one. Zangenehzadeh et al [80]…”

Section: Phthalocyanine-and Porphyrin-based Spr Sensors For the Detec...mentioning

confidence: 99%

See 1 more Smart Citation

Phthalocyanine and Porphyrin Derivatives and Their Hybrid Materials in Optical Sensors Based on the Phenomenon of Surface Plasmon Resonance

Basova

2024

Chemosensors

View full text Add to dashboard Cite

In this review, the state of research over the past fifteen years in the field of the applications of metal phthalocyanines and porphyrin derivatives as well as their hybrid materials with carbon nanotubes, metal oxides, and polymers in optical sensors based on the phenomenon of surface plasmon resonance (SPR) is analyzed. The first chapter of the review presents an analysis of works on the use of porphyrins and phthalocyanines in classical SPR sensors for the detection of gases and volatile organic vapors, as well as their improved modifications, such as total internal reflection ellipsometry (TIRE) and magneto-optical SPR (MOSPR) methods, while the second chapter is devoted to their application for the detection of various analytes in solutions. The third chapter of the review summarizes publications describing recent advances in the use of porous materials based on hybrids of carbon nanotubes and oxides with metal phthalocyanines. The fourth chapter describes two-dimensional metal-organic frameworks (MOFs) based on metal porphyrin derivatives as SPR sensitizers.

show abstract

“…It was shown that N-methyl mesoporphyrin IX interacts more strongly with a parallel G4 structure than with an antiparallel one. Zangenehzadeh et al [80]…”

Section: Phthalocyanine-and Porphyrin-based Spr Sensors For the Detec...mentioning

confidence: 99%

“…It was shown that N-methyl mesoporphyrin IX interacts more strongly with a parallel G4 structure than with an antiparallel one. Zangenehzadeh et al [80] demonstrated the performance of self-assembled monolayers (SAMs) of mesopyridyl porphyrin, 5-( 4…”

Section: Hybrid Materials Of Phthalocyanines and Porphyrins With Carb...mentioning

confidence: 99%

Phthalocyanine and Porphyrin Derivatives and Their Hybrid Materials in Optical Sensors Based on the Phenomenon of Surface Plasmon Resonance

Basova

2024

Chemosensors

View full text Add to dashboard Cite

show abstract

“…Such methods are established in electrocatalysis, battery, and bioelectrochemistry research, and they describe the spectroscopic or microscopic monitoring of electrochemical processes under operational conditions. − Among them, spectroelectrochemistry relies on the optical transparency of the working electrode, and with the implementation of ITO electrodes, this method was commenced to study redox-active proteins about 60 years ago . Up to now, the operando combination of electrochemistry and spectroscopic ellipsometry is rather rarely applied, possibly due to the challenges of optical modeling and the limitations of continuous and reasonably smooth layers. − Nonetheless, ellipsometry is a powerful tool to obtain both the dielectric optical response function (i.e., complex refractive index) of thin films as well as the electric properties for Drude-like behavior, which apply well to ITO thin films. − Furthermore, ellipsometry is a sensitive probe to monitor the adsorption of ultrathin layers at solid–liquid interfaces such as self-assembled monolayers and biomolecules. − Even specific immobilization of biomolecules and cells at functionalized hybrid interfaces for biosensing purposes can be traced. − More specifically, operando ellipsometry allows to study reversible ion intercalation processes upon electrochemical cycling in battery-related research. − For spatially resolved investigation, operando imaging ellipsometry is an emerging probe for battery electrodes, and it provides insights by monitoring the local change of ellipsometric parameters at selected wavelengths. , …”

Section: Introductionmentioning

confidence: 99%

“… 60 − 64 Even specific immobilization of biomolecules and cells at functionalized hybrid interfaces for biosensing purposes can be traced. 65 − 67 More specifically, operando ellipsometry allows to study reversible ion intercalation processes upon electrochemical cycling in battery-related research. 52 − 54 For spatially resolved investigation, operando imaging ellipsometry is an emerging probe for battery electrodes, and it provides insights by monitoring the local change of ellipsometric parameters at selected wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the Electrochemical Failure of Indium Tin Oxide Electrodes via Operando Ellipsometry Complemented by Electron Microscopy and Spectroscopy

Minenkov,

Hollweger,

Duchoslav

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Transparent conductive oxides such as indium tin oxide (ITO) are standards for thin film electrodes, providing a synergy of high optical transparency and electrical conductivity. In an electrolytic environment, the determination of an inert electrochemical potential window is crucial to maintain a stable material performance during device operation. We introduce operando ellipsometry, combining cyclic voltammetry (CV) with spectroscopic ellipsometry, as a versatile tool to monitor the evolution of both complete optical (i.e., complex refractive index) and electrical properties under wet electrochemical operational conditions. In particular, we trace the degradation of ITO electrodes caused by electrochemical reduction in a pH-neutral, water-based electrolyte environment during electrochemical cycling. With the onset of hydrogen evolution at negative bias voltages, indium and tin are irreversibly reduced to the metallic state, causing an advancing darkening, i.e., a gradual loss of transparency, with every CV cycle, while the conductivity is mostly conserved over multiple CV cycles. Post-operando analysis reveals the reductive (loss of oxygen) formation of metallic nanodroplets on the surface. The reductive disruption of the ITO electrode happens at the solid–liquid interface and proceeds gradually from the surface to the bottom of the layer, which is evidenced by cross-sectional transmission electron microscopy imaging and complemented by energy-dispersive X-ray spectroscopy mapping. As long as a continuous part of the ITO layer remains at the bottom, the conductivity is largely retained, allowing repeated CV cycling. We consider operando ellipsometry a sensitive and nondestructive tool to monitor early stage material and property changes, either by tracing failure points, controlling intentional processes, or for sensing purposes, making it suitable for various research fields involving solid–liquid interfaces and electrochemical activity.

show abstract

“…Oriented fibers have particular applications such as replicating extracellular matrix in human body, serving as scaffolds for tissue engineering, as well as drug and gene delivery systems [1]. Also, polymers materials are indispensable in biosensing [2,3], waveguide based sensor applications [4], and all-polymer based photonic components [5].…”

Section: Introductionmentioning

confidence: 99%

Monitoring of multiple fabrication parameters of electrospun polymer fibers using mueller matrix analysis

Sharma,

Jütte,

Gopani

et al. 2024

J. Opt.

View full text Add to dashboard Cite

Electrospun polymer fiber mats feature versatile applications in tissue engineering, drug delivery, water treatment and chemical processes. The orientation of fibers within these mats is a crucial factor that significantly influences their properties and performance. However, the analysis of fiber samples using scanning electron microscopy (SEM) has limitations such as time consumption, fixed assembly, and restricted field of vision. Therefore, a fast and reliable method for qualitative measurements of fiber orientation is required. Mueller matrix polarimetry, a well-established method for measuring orientation of chemical and biological species, was employed in this case.We investigated the effect of four important parameters of the electrospinning process, namely collector speed, applied voltage, needle-to-collector distance, and solution concentration, on fiber orientation using Mueller matrix polarimetry thus extending the range of parameters analysed.  Measurements were performed using two extreme values and a central optimized value for each fabrication parameter. Changes in matrix values were observed for each fabrication parameter, and their correlation with fiber orientation was analyzed based on the Lu-Chipman decomposition. The results were compared with SEM images, which served as the ground truth, and showed overall good agreement. In the future, the analysis of electrospun polymer fibers can be done by using Mueller matrix polarimetry as alternative to current technology and fabrication parameters, including solution concentration for the first time in this context and the production can quickly be adjusted based on the outcome of the measurements. 

show abstract

Bacteria detection in a Kretschmann geometry flow cell at a plasmon-enhanced interface with spectroscopic ellipsometer

Cited by 7 publications

References 17 publications

Phthalocyanine and Porphyrin Derivatives and Their Hybrid Materials in Optical Sensors Based on the Phenomenon of Surface Plasmon Resonance

Phthalocyanine and Porphyrin Derivatives and Their Hybrid Materials in Optical Sensors Based on the Phenomenon of Surface Plasmon Resonance

Monitoring the Electrochemical Failure of Indium Tin Oxide Electrodes via Operando Ellipsometry Complemented by Electron Microscopy and Spectroscopy

Monitoring of multiple fabrication parameters of electrospun polymer fibers using mueller matrix analysis

Contact Info

Product

Resources

About