The adsorption behavior of energy-related gases onto ZIF-8 was investigated using terahertz waves. Comparison of the terahertz transmission spectra of ZIF-8 before and after exposure to the gases ...revealed that the 2 THz vibrational mode was involved in the gate-opening motion of organic linker molecules. The adsorption properties of each gas were detailed by monitoring the intensities of the 2 THz absorption peak.
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IJS, KILJ, NUK, PNG, UL, UM
A pH electrode incorporating a reference electrode different from that in conventional electrodes was applied to the measurement of rainwater pH. The reference electrode utilizes a recently proposed ...ionic liquid salt bridge instead of a conventional potassium chloride salt bridge. The response time of this electrode was remarkably improved in rain sample pH measurements compared to that of conventional pH electrodes. In addition, the measured pH values of rain samples seemed to be more accurate with this electrode.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Antibody binding to bovine serum albumin (BSA) and human serum albumin (HSA) immobilized onto gold nanoparticles was studied by means of localized surface plasmon resonance (LSPR) spectroscopy. ...Amine-modified glass was prepared by self-assembly of amine-terminated silane on substrate, and gold (Au) nanoparticles were deposited on the amine-modified glass substrate. Au nanoparticles deposited on the glass surface were functionalized by BSA and HSA. BSA immobilization was confirmed by LSPR spectroscopy in conjunction with surface-enhanced Raman scattering spectroscopy. Then, LSPR response attributable to the binding of anti-BSA and anti-HSA to BSA- and HSA-functionalized Au nanoparticles, respectively, was examined. Anti-HSA at levels larger than ~10 nM could be detected by HSA-immobilized chips with LSPR optical response, which was saturated at concentrations greater than ~650 nM of anti-HSA.
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
In this study, we recorded the transitional response in terms of terahertz transmittance of zeolitic imidazole framework-8 Zn(2-methylimidazolate)2, ZIF-8 at 2.0 THz as a function of exposure time to ...gaseous propane and n-butane. The transmittance at 2.0 THz increased as gas adsorbed onto the ZIF-8. Conversely, during a nitrogen purge, transmittance decreased as the alkane gas desorbed. We estimated time constants for the adsorption and desorption of the two gases by comparing the plots of their responses. We also demonstrated the potential of using a combination of ZIF materials and terahertz technology as a novel gas analyzer. DOI: 10.1380/ejssnt.2018.142
Ligand exchange reactions of a monomeric zirconium carbonate complex with carboxylic acids were studied by means of extended X-ray absorption fine structure (EXAFS), UV absorption spectrophotometry ...and Raman spectrometry. Three carboxylic acids, gluconic acid, and L-tartaric acid and citric acid, which are mono-, di- and tri-carboxylic acids, respectively, were employed in this study. These three carboxylic acids gave different spectral signatures and concentration dependences, respectively. In the gluconic acid system, the peaks on Fourier transform of EXAFS spectrum and Raman spectrum caused by carbonate ion coordinating to zirconium atom were obviously decreased with increasing gluconic acid concentration compared to the other two carboxylic acid systems. This indicates the high association ability of gluconic acid to zirconium, which was revealed by UV spectrophotometric analysis.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Photovoltaic (PV) backsheets composed of polyvinylidene difluoride (PVDF) and polyethylene terephthalate (PET) films were evaluated via principal component analysis (PCA) of near infrared (NIR) ...spectral datasets obtained using a potable NIR spectrometer. The discrimination of material and the degree of deterioration of the backsheets following heating and humidifying or irradiating with UV light was examined. Multiple linear regression (MLR) analysis was also employed to evaluate the degree of deterioration. The reference values (peel and tensile strength) were obtained via the International Electrotechnical Commission (IEC) 61215 and Underwriters Laboratories (UL) 1703 standard methods. The values of the peel strength and tensile strength after heating/humidifying treatment correlate quite strongly with the NIR predicted values (R2=0.946 and R2=0.973, respectively). These results show that the degree of deterioration of a PV backsheet can be nondestructively and easily determined via NIR spectroscopy.
A Deterioration of backsheet for photovoltaic (PV) devices is recently evaluated by its mechanical strength. A quick and nondestructive evaluation method for the deterioration of the backsheets is required, since the present method is destructive. The evaluation of the deterioration of the PV backsheet by means of near-infrared(NIR) spectroscopy have been studied.
It was found that the principal component analysis (PCA) of NIR spectra is very effective for the discrimination of the degree of the deterioration of backsheets. The mechanical strengths predicted by multiple linear regression (MLR) of NIR spectra were strongly correlated to the reference values by the standard method. These results show that the degree of deterioration of a PV backsheet can be nondestructively and easily determined via NIR spectroscopy. Display omitted
► The deterioration of the photovoltaic backsheets was evaluated by NIR spectroscopy. ► Principal component analysis allowed the discrimination of material of backsheets. ► The mechanical strengths predicted by NIR were strongly correlated to the reference values.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
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