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Fourier transform spectroscopy

About: Fourier transform spectroscopy is a research topic. Over the lifetime, 5418 publications have been published within this topic receiving 134133 citations.


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Journal ArticleDOI
TL;DR: In the last decade, Raman spectroscopy has become more popular than at any other time in its 70-year history as discussed by the authors, and several factors have contributed to this explosive increase in usage.
Abstract: D uring the last decade, Raman spectroscopy has become more popular than at any other time in its 70-year history. Several factors have contributed to this explosive increase in usage. Sample preparation for Raman spectrometry has always been easy, but when visible lasers were used to excite the Raman spectrum, the majority of samples gave rise to such high ̄ uorescence that the Raman spectrum was dominated by the shot noise associated with the ̄ uorescence. The accessibility to longer wavelength lasers, such as the 785

41 citations

Journal ArticleDOI
TL;DR: In this paper, the structural characteristics of poly(tetrafluoroparaxylylene) (PA‐F) films deposited directly from C6H4(CF2Br)2 precursor have been studied using Fourier transform infrared spectroscopy (FTIR) and x-ray photoelectron spectroscopic (XPS).
Abstract: Structural characteristics of poly(tetrafluoroparaxylylene) (PA‐F) films deposited directly from C6H4(CF2Br)2 precursor have been studied using Fourier transform infrared spectroscopy (FTIR) and x‐ray photoelectron spectroscopy (XPS). Zn was used as the catalyst and the vapor pyrolysis of precursor was carried out between 350 and 400 °C. It is shown that the FTIR and XPS spectra of the PA‐F films deposited from the precursor are comparable to those made from the conventional dimer route. Dissociation of the PA‐F films does not occur up to an annealing temperature of 500 °C. Both Zn and Br contaminants were observed in the XPS spectra. However, we found that the Br contamination disappears after annealing to an elevated temperature (≥350 °C), while Zn impurities still remain in the film.

41 citations

Journal ArticleDOI
TL;DR: Uranyl, UO(2)(2+), was electrochemically determined by a phosphate based self-assembled monolayer by square wave voltammetry.
Abstract: Uranyl, UO22+, was electrochemically determined by a phosphate based self-assembled monolayer. A pretreated gold electrode with 2-mercatpoethanol was chemically modified by POCl3 or POBr3 to obtain the surface phosphate active sites. The different stages were characterized by reflection−absorption Fourier transform-infrared (FT-IR) spectroscopy, capacity, and X-ray photoelectron spectroscopy (XPS). The electrochemical determination of UO22+ was accomplished, after preconcentration under open circuit potential, by square wave voltammetry.

41 citations

Journal ArticleDOI
TL;DR: The present method appears to offer the best available determination of the relative abundances of ions of different mass-to-charge ratio in FT/ICR mass spectrometry.
Abstract: The area under a correctly phased absorption-mode spectral peak is a direct measure of the number of oscillators (ions, spins, molecules) in Fourier transform spectrometry (ion cyclotron resonance, magnetic resonance, interferometry absorbance). However, phase correction can prove difficult when (as in broad-band Fourier transform ion cyclotron resonance (FT/ICR] detection is considerably time-delayed after excitation. In the absence of noise, Huang, Rempel, and Gross showed that a "complex area" method yields the correct absorption-mode peak area, for an unphased noiseless spectrum. In this paper, we show that the number of oscillators may also be obtained from a least-squares fit to a magnitude-mode (i.e., phase-independent) spectrum. In the presence of noise and in the absence of peak overlap, the magnitude-mode method offers precision superior to that based on magnitude-mode peak height, "complex area", or even direct digital integration of a correctly phased absorption-mode peak, as demonstrated by both theoretical derivation and experimental FT/ICR results. The present method thus appears to offer the best available determination of the relative abundances of ions of different mass-to-charge ratio in FT/ICR mass spectrometry.

41 citations

Journal ArticleDOI
TL;DR: In this paper, an Intracavity Laser Absorption Spectrometer (ICLAS) based on a Vertical External Cavity Surface Emitting Laser (VECSEL) has been used to record the absorption spectrum of H2S between 9540 and 10 000 cm −1 with pressures up to 122 −Torr (160.5 −hPa) and equivalent absorption path lengths up to 45 kilometres.

41 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202334
2022117
202171
202076
2019108
201888