Studies on ion transport during potential cycling of a Prussian blue (inner)|polyaniline (outer) bilayer electrode by quartz crystal microbalance and Fourier transform infrared reflection spectroscopy

2000 ◽  
Vol 486 (2) ◽  
pp. 119-125 ◽  
Author(s):  
K Ogura ◽  
K Nakaoka ◽  
M Nakayama
Keyword(s):  
Fourier Transform ◽  
Ion Transport ◽  
Prussian Blue ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Reflection Spectroscopy ◽  
Potential Cycling ◽  
Infrared Reflection ◽  
Bilayer Electrode ◽  
Infrared Reflection Spectroscopy

Fourier Transform Far-Infrared Reflection Spectroscopy of Ba[Zn1/3(Nb1-xTax)2/3]O3 Solid Solutions

2013 ◽  
Vol 873 ◽  
pp. 316-321
Author(s):  
Feng Shi ◽  
Yu Fen Gu ◽  
Cui Xia Li
Keyword(s):  
Fourier Transform ◽  
Crystal Structures ◽  
Solid Solutions ◽  
Far Infrared ◽  
Structural Data ◽  
Hexagonal Structure ◽  
Reflection Spectroscopy ◽  
Phonon Modes ◽  
Infrared Reflection ◽  
Infrared Reflection Spectroscopy

Ba [Zn1/3(Nb1-xTax)2/3]O3 (BZNT, x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) solid solutions were synthesized by conventional solid-state sintering technique. Fourier transform far-infrared reflection spectroscopy (FTIR) and X-ray diffraction (XRD) were employed to evaluate the correlation between crystal structures and vibration modes of these solid solutions as a function of Nb5+ ions replaced by Ta5+ ions. Spectroscopic and structural data show sensitivity to the sample structural evolution with Ta5+ concentration. XRD result shows that the peaks shift to lower angle, i.e. higher d-spacing, with the increase in Ta5+content, and the lattice structures have changed from cubic structure to hexagonal structure gradually with the increase in the unit cell volume due to the substitution of Ta5+ to Nb5+. The phase transition is also verified by the FTIR spectra. The phonon modes of the vibration spectra were assigned, the position and width were determined, and the correlation of phonon vibrations with the crystal structures for the different atoms substituted in the-site was found.

Monitoring the effects of chemical stimuli on live cells with metasurface-enhanced infrared reflection spectroscopy

2021 ◽  
Author(s):  
Steven H. Huang ◽  
Jiaruo Li ◽  
Zhiyuan Fan ◽  
Robert Delgado ◽  
Gennady Shvets
Keyword(s):  
Intracellular Signaling ◽  
Strong Field ◽  
Detection System ◽  
Field Enhancement ◽  
Chemical Imaging ◽  
Live Cells ◽  
Label Free ◽  
Reflection Spectroscopy ◽  
Infrared Reflection ◽  
Infrared Reflection Spectroscopy

Infrared spectroscopy has found wide applications in the analysis of biological materials. A more recent development is the use of engineered nanostructures, or plasmonic metasurfaces, as substrates for metasurface-enhanced infrared reflection spectroscopy (MEIRS). Here, we demonstrate that strong field enhancement from plasmonic metasurfaces enables the use of MEIRS as a highly informative analytic technique for real-time monitoring of cells. By exposing live cells cultured on a plasmonic metasurface to chemical compounds, we show that MEIRS can be used as a label-free phenotypic assay for detecting multiple cellular responses to external stimuli: changes in cell morphology, adhesion, lipid composition of the cellular membrane, as well as intracellular signaling. Using a focal plane array detection system, we show that MEIRS also enables spectro-chemical imaging at the single-cell level. The described metasurface-based all-optical sensor opens the way to a scalable, high-throughput spectroscopic assay for live cells.

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