Structure and Orientation of Collectors Adsorbed at the ZnS/Water Interface

Larsson, Margareta L.; Holmgren, Allan; Forsling, Willis

doi:10.1006/jcis.2001.7592

Cited by 12 publications

(3 citation statements)

References 17 publications

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“…Thus, xanthates and other collector chemicals have been studied using both external and internal reflection [1][2][3][4]. However, these studies have not utilized the possibility of in situ experiments.…”

Section: Introductionmentioning

confidence: 99%

Direct observation of a self-assembled monolayer of heptyl xanthate at the germanium/water interface: a polarized FTIR study

Larsson

Fredriksson

Holmgren

2004

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Direct observation of a self-assembled monolayer of heptyl xanthate at the germanium/water interface: a polarized FTIR study

Larsson

Fredriksson

Holmgren

2004

Journal of Colloid and Interface Science

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“…In this study, which is part of a larger investigation on adsorption properties of mineral surfaces (e.g., refs , ), we report on the orientation of heptylxanthate (R−CS 2 - , R = O−C 7 H 15 ) on the surface of a ZnS crystal in the form of a trapezoidal attenuated total reflection (ATR) element. In addition to getting information about the preferred orientation of the adsorbate, the aim of the study was also to investigate possible formation of dixanthogen and/or precipitated zinc xanthate on the substrate surface.…”

Section: Introductionmentioning

confidence: 99%

Xanthate Adsorbed on ZnS Studied by Polarized FTIR-ATR Spectroscopy

2000

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The structure and orientation of heptylxanthate adsorbed on a ZnS surface have been studied by the FTIR-ATR technique. By using polarized light and the dichroic ratio, we found the average tilt angle to be approximately 44 degrees. The adsorbed layer studied was prepared by self-assembly from solution or by spraying the solution onto the surfaces of the ATR crystal for a short time and then rinsing with water. From the spectra we can conclude that there is a mixture of adsorbed heptylxanthate and formed diheptyldixanthogen on the ZnS surface. A bridging coordination of the adsorbed heptylxanthate is proposed.

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“…The problem of fluorescence applies to the sample as well as the substrate: Beattie et al found the surfactant 2-mercaptobenzothiazole fluoresced strongly when adsorbed as a dimer, 35 whereas such problems were not observed in ATR-IR. 36 For applications at the solid-water interface, one of the most important considerations is the intensity of the water background, and this is one of the areas where Raman and IR differ most strongly. Table 1 compares Raman and IR cross-sections of the O-H stretching modes in water and C-H stretching modes in hydrocarbons.…”

Section: Comparison With Other Vibrational Spectroscopiesmentioning

confidence: 99%

Total internal reflection Raman spectroscopy

Woods

Bain

2012

Analyst

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Further information on publisher's website:http://dx.doi.org/10.1039/c1an15722aPublisher's copyright statement:Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO• the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractTotal internal reflection (TIR) Raman spectroscopy is an experimentally straightforward, surface-sensitive technique for obtaining chemically specific spectroscopic information from a region within approximately 100-200 nm of a surface. While TIR Raman spectroscopy has long been overshadowed by surface-enhanced Raman scattering, with modern instrumentation TIR Raman spectra can be acquired from sub-nm thick films in only a few seconds. In this review, we describe the physical basis of TIR Raman spectroscopy and illustrate the performance of the technique in the diverse fields of surfactant adsorption, liquid crystals, lubrication, polymer films and biological interfaces, including both macroscopic structures such as the surfaces of leaves, and microscopic structures such as lipid bilayers. Progress, and challenges, in using TIR Raman to obtain depth profiles with sub-diffraction resolution are described.

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Structure and Orientation of Collectors Adsorbed at the ZnS/Water Interface

Cited by 12 publications

References 17 publications

Direct observation of a self-assembled monolayer of heptyl xanthate at the germanium/water interface: a polarized FTIR study

Direct observation of a self-assembled monolayer of heptyl xanthate at the germanium/water interface: a polarized FTIR study

Xanthate Adsorbed on ZnS Studied by Polarized FTIR-ATR Spectroscopy

Total internal reflection Raman spectroscopy

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