Chased from Sigma-Aldrich. Di-sodium hydrogen phosphateGamero-Quijano et al., Sci. Adv. 7, eabg
Chased from Sigma-Aldrich. Di-sodium hydrogen phosphateGamero-Quijano et al., Sci. Adv. 7, eabg4119 (2021) five NovemberSCIENCE ADVANCES | Analysis ARTICLESnell’s law (TFT sin 1 = H 2O sin 2; where TFT = 1.414, H2O = 1.330, and 2 is assumed to be 90. The light source (Xe lamp HPX-2000, Ocean Optics) was guided by an optical fiber with a 200-m core (Newport) and focused on the water-TFT interface by way of plano-convex (Thorlabs) and achromatic lenses (Newport); see Fig. 6. All lenses had been placed at their confocal lengths. The longer wavelengths ( 700 nm) have been reduce by a Hot Mirror (Thorlabs) to avoid heating from the interfacial region. The reflected light was focused onto an optical fiber with a 1500 mm core (Thorlabs). The absorption spectra had been recorded by a Maya 2000Pro (Ocean Optics). In situ parallel beam UV/Vis absorbance spectroscopy The spectrometer made use of was a USB 2000 Fiber Optic Spectrometer (Ocean Optics). The light supply that was a NK3 Inhibitor manufacturer DH-2000-BAL deuteriumhalogen (Ocean Optics) was guided via the optical fiber of 600 m in diameter (Ocean Optics, USA). The light beam was collimated using optical lenses (Thorlabs; focal length, 2 cm) just before and after the transmission from the beam via the electrochemical cell. The light beam passed by means of the electrochemical cell slightly above the water-TFT interface, i.e., through the aqueous phase. w The interfacial Galvani potential difference ( o ) was controlled working with an Autolab PGSTAT204 potentiostat (Metrohm, Switzerland). Differential capacitance measurements AC voltammetry was performed in a four-electrode electrochemical cell. Differential capacitance was calculated in the interfacial admittance recorded working with an Autolab FRA32M module in combination together with the Autolab PGSTAT204 at a frequency of 5 Hz and root imply square amplitude of 5 mV. The scan path was from negative toward much more positive potentials, from ca. -0.three to +0.55 V. Double possible step chronoamperometry DPSCA experiments have been performed in a four-electrode electrochemical cell in conjunction together with the in situ parallel beam UV/vis absorbance spectroscopy setup described vide supra. The very first pow tential step was held at o = +0.four V for ten s. The second potential w step was unfavorable and held at o = -0.three V for ten s. This double prospective step was repeated 300 times, and one UV/vis spectrum was recorded inside each and every cycle. Confocal fluorescence microscopy Samples were imaged on an ImageXpress Micro Confocal High-Content Imaging Program (Molecular Devices) with 20X S Program Apo-objective. Confocal Raman spectroscopy Raman spectra have been collected working with a Renishaw Invia Qontor confocal Raman spectrometer (excitation = 532 nm) in PDE7 Inhibitor Formulation static mode (2400 grooves/mm). Due to vibrations on the liquid-liquid interface, and to sustain a superb concentrate during the whole scan, the static mode was preferred to acquire Raman spectra more than the synchroscan mode. Static mode allowed faster scan over the 650 to 1800 cm-1 area of interest. In typical, 10 to 15 s was necessary to record a full Raman spectrum.Fig. 6. UV/vis-TIR experimental setup. (Top rated) Image in the visible light beam undergoing total internal reflection at a water-TFT interface. Photo credit: Alonso Gamero-Quijano (University of Limerick, Ireland). (Bottom) Optical setup for in situ UV/vis absorbance measurements in total internal reflection (UV/vis-TIR). (1) Xe light source (Ocean optics HPX-2000), (two) neutral density (ND) filter, (3) Ultraviolet fused silica (UVFS) oated pl.
