Raman spectrum of dimethyl sulfoxide (DMSO) and the influence of solvents

Selvarajan, A.

doi:10.1007/bf03049330

Cited by 23 publications

(15 citation statements)

References 7 publications

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“…However, the bands revealed for the R6G in DMSO are slightly red-shifted due to the effect of surrounding medium on the vibrational frequencies. 50 Because the band appearing around 1420 cm −1 is associated with CH 3 degenerate deformation mode of DMSO, 51 it was intentionally suppressed from the Raman spectrum (see blue dashed line, Figure 7) to calculate the integral intensity of the SERS signal. As we can notice, the enhancement of the Raman signal is higher when the refractive index of the dispersion medium approaches the refractive index of the shell matrix.…”

Section: Resultsmentioning

confidence: 99%

Near-Electric-Field Tuned Plasmonic Au@SiO₂ and Ag@SiO₂ Nanoparticles for Efficient Utilization in Luminescence Enhancement and Surface-Enhanced Spectroscopy

2017

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Application of core−shell plasmonic nanostructures in fluorescence enhancement and surface-enhanced Raman scattering (SERS) strongly depends on their near-field electrodynamical environments. A nonradiative energy transfer takes place between fluorescent molecules and surface plasmon when they are too close. However, for a dielectric shell, the SERS intensity of analytes decreases exponentially beyond 2 nm thickness. Although electromagnetic-field enhancement due to surface plasmon still occurs at longer distances from the metal core, it needs a proper design of the composite nanostructure to exploit this advantage, and an optimal distance between the metal-core and analyte/fluorescent molecule still seems necessary. We analyze, both theoretically and experimentally, the near-electric-field (NEF) distributions in the proximity of the core−shell and shell−medium interfaces of Au@ SiO 2 and Ag@SiO 2 core−shell structures immersed in common dispersing media such as air, water, and DMSO to investigate the effects of surrounding medium and particle geometry on them. Through Mie-based theoretical calculations, we demonstrate that the NEF distributions near core−shell and shell−medium interfaces depend not only on the geometrical parameters, but also on the dielectric constant gradient at these interfaces. For each of the dispersion media and a wide range of metal-core radii, we calculate the optimum shell thickness for obtaining the maximum near-field enhancement at the core−shell and shell−medium interfaces, the essential requirements for applying these nanostructures in fluorescence enhancement and SERS. Theoretically obtained results have been qualitatively verified with experiments.

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Section: Resultsmentioning

confidence: 99%

Near-Electric-Field Tuned Plasmonic Au@SiO₂ and Ag@SiO₂ Nanoparticles for Efficient Utilization in Luminescence Enhancement and Surface-Enhanced Spectroscopy

2017

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“…Then, we pinpointed the lasers to the center of one PMMA bead marked with blue and red lines in Figure 2A and acquired the MIP spectrum and Raman spectrum. The Raman spectrum was calibrated by peaks of dimethyl sulfoxide (DMSO) 33 sandwiched between two glass coverslips (ThermoFisher, Cat. 12440S).…”

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confidence: 99%

Fingerprinting a Living Cell by Raman Integrated Mid-Infrared Photothermal Microscopy

Zhang

Bai

et al. 2019

Anal. Chem.

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Vibrational spectroscopic imaging techniques, based on infrared absorption or Raman scattering, allow for noninvasive chemically specific visualization of biological systems. The infrared and Raman modalities with different selection rules provide complementary information. Specifically, infrared microscopy provides strong signals in the fingerprint region, but suffers from low spatial resolution. Raman microscopy provides submicrometer resolution, but requires a long acquisition time. We developed a system that combines the strengths of both techniques by integrating confocal Raman microspectroscopy to the recently developed mid-infrared photothermal microscopy. This hybrid system is capable of fast infrared photothermal imaging of living cells with submicrometer resolution to identify points of interest, followed by a full-spectrum Raman analysis of the identified objects. In addition, a fingerprint photothermal spectrum can be acquired by scanning the wavelengths of the infrared laser. Comprehensive vibrational fingerprint mapping of live cells, demonstrated in adipocytes and single bacteria, promises broad applications of this technology in biology and material science.

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“…The optimized precursor compositions had Cu/Me, Zn/Me, and Sn/Me ratios of Table 2. Active Raman modes and tentatively assigned species [23][24][25][26][27] . , which correspond to a Cu:Zn:Sn ratio of 1.2:1.2:1.…”

Section: Resultsmentioning

confidence: 99%

“…2 c) consists of several peaks between 308 and , as listed in Table 2 . These peaks are assigned to C–S–C bending, C–S–O bending, C–S stretching, rocking, and S=O stretching 23 . In the case of a DMSO and TU solution (yellow line, Fig.…”

Section: Resultsmentioning

confidence: 99%

Spin-coated $$\hbox {Cu}_2\hbox {ZnSnS}_{4}$$ solar cells: A study on the transformation from ink to film

Engberg

Martinho

Gansukh

et al. 2020

Sci Rep

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In this paper, we study the DMSO/thiourea/chloride salt system for synthesis of pure-sulfide $$\hbox {Cu}_2\hbox {ZnSnS}_{4}$$ Cu 2 ZnSnS 4 (CZTS) thin-film solar cells under ambient conditions. We map out the ink constituents and determine the effect of mixing time and filtering. The thermal behavior of the ink is analyzed, and we find that more than 90% of the solvent has evaporated at $$250\,^{\circ }\hbox {C}$$ 250 ∘ C . However, chloride and sulfoxide species are released continually until $$500\,^{\circ }\hbox {C}$$ 500 ∘ C , suggesting the advantage of a higher pre-annealing temperature, which is also commonly observed in the spin-coating routines in literature. Another advantage of a higher pre-annealing temperature is that the worm-like pattern in the spin-coated film can be avoided. We hypothesize that this pattern forms as a result of hydrodynamics within the film as it dries, and it causes micro-inhomogeneities in film morphology. Devices were completed in order to finally evaluate the effect of varying thermal exposure during pre-annealing. Contrary to the previous observations, a lower pre-annealing temperature of $$250\,^{\circ }\hbox {C}$$ 250 ∘ C results in the best device efficiency of 4.65%, which to the best of our knowledge is the highest efficiency obtained for a pure-sulfide kesterite made with DMSO. Lower thermal exposure during pre-annealing results in larger grains and a thicker $$\hbox {MoS}_2$$ MoS 2 layer at the CZTS/Mo interface. Devices completed at higher pre-annealing temperatures display the existence of either a Cu-S secondary phase or an incomplete sulfurization with smaller grains and a fine-grain layer at the back interface.

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Raman spectrum of dimethyl sulfoxide (DMSO) and the influence of solvents

Cited by 23 publications

References 7 publications

Near-Electric-Field Tuned Plasmonic Au@SiO₂ and Ag@SiO₂ Nanoparticles for Efficient Utilization in Luminescence Enhancement and Surface-Enhanced Spectroscopy

Near-Electric-Field Tuned Plasmonic Au@SiO₂ and Ag@SiO₂ Nanoparticles for Efficient Utilization in Luminescence Enhancement and Surface-Enhanced Spectroscopy

Fingerprinting a Living Cell by Raman Integrated Mid-Infrared Photothermal Microscopy

Spin-coated $$\hbox {Cu}_2\hbox {ZnSnS}_{4}$$ solar cells: A study on the transformation from ink to film

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Raman spectrum of dimethyl sulfoxide (DMSO) and the influence of solvents

Cited by 23 publications

References 7 publications

Near-Electric-Field Tuned Plasmonic Au@SiO2 and Ag@SiO2 Nanoparticles for Efficient Utilization in Luminescence Enhancement and Surface-Enhanced Spectroscopy

Near-Electric-Field Tuned Plasmonic Au@SiO2 and Ag@SiO2 Nanoparticles for Efficient Utilization in Luminescence Enhancement and Surface-Enhanced Spectroscopy

Fingerprinting a Living Cell by Raman Integrated Mid-Infrared Photothermal Microscopy

Spin-coated $$\hbox {Cu}_2\hbox {ZnSnS}_{4}$$ solar cells: A study on the transformation from ink to film

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Product

Resources

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Near-Electric-Field Tuned Plasmonic Au@SiO₂ and Ag@SiO₂ Nanoparticles for Efficient Utilization in Luminescence Enhancement and Surface-Enhanced Spectroscopy

Near-Electric-Field Tuned Plasmonic Au@SiO₂ and Ag@SiO₂ Nanoparticles for Efficient Utilization in Luminescence Enhancement and Surface-Enhanced Spectroscopy