Graphene Oxide as a Novel Evenly Continuous Phase Matrix for TOF-SIMS

Cai, Lesi; Sheng, Linfeng; Xia, Meng-Chan; Li, Zhanping; Zhang, Sichun; Zhang, Xinrong; Chen, Hong‐Yuan

doi:10.1007/s13361-016-1557-z

Cited by 19 publications

(18 citation statements)

References 42 publications

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“… 64 , 65 However, depth profiling combined with metal-assisted SIMS can only be performed while using a nonconventional experimental setup. 66 The ionization yield can also be increased by depositing ionic liquids 67 or graphene oxide 68 on the sample surface. Furthermore, the samples can be mixed with specific matrices, 69 − 71 but with this approach we lose the surface sensitivity.…”

Section: Introductionmentioning

confidence: 99%

ToF-SIMS Depth Profiling of Metal, Metal Oxide, and Alloy Multilayers in Atmospheres of H₂, C₂H₂, CO, and O₂

Ekar

Panjan

Drev³

et al. 2021

J. Am. Soc. Mass Spectrom.

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The influence of the flooding gas during ToF-SIMS depth profiling was studied to reduce the matrix effect and improve the quality of the depth profiles. The profiles were measured on three multilayered samples prepared by PVD. They were composed of metal, metal oxide, and alloy layers. Dual-beam depth profiling was performed with 1 keV Cs + and 1 keV O 2 + sputter beams and analyzed with a Bi + primary beam. The novelty of this work was the application of H 2 , C 2 H 2 , CO, and O 2 atmospheres during SIMS depth profiling. Negative cluster secondary ions, formed from sputtered metals/metal oxides and the flooding gases, were analyzed. A systematic comparison and evaluation of the ToF-SIMS depth profiles were performed regarding the matrix effect, ionization probability, chemical sensitivity, sputtering rate, and depth resolution. We found that depth profiling in the C 2 H 2 , CO, and O 2 atmospheres has some advantages over UHV depth profiling, but it still lacks some of the information needed for an unambiguous determination of multilayered structures. The ToF-SIMS depth profiles were significantly improved during H 2 flooding in terms of matrix-effect reduction. The structures of all the samples were clearly resolved while measuring the intensity of the M n H m – , M n O m – , M n O m H – , and M n – cluster secondary ions. A further decrease in the matrix effect was obtained by normalization of the measured signals. The use of H 2 is proposed for the depth profiling of metal/metal oxide multilayers and alloys.

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Section: Introductionmentioning

confidence: 99%

ToF-SIMS Depth Profiling of Metal, Metal Oxide, and Alloy Multilayers in Atmospheres of H₂, C₂H₂, CO, and O₂

Ekar

Panjan

Drev³

et al. 2021

J. Am. Soc. Mass Spectrom.

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“…This technique is also capable of accurately detecting and mapping material compositions of the surface of an object . In recent years, it has been widely used in materials science, bio‐imaging, herbal medicines, and particulate matter . TOF‐SIMS is also applied in the field of geochemistry .…”

Section: Introductionmentioning

confidence: 99%

“…6 In recent years, it has been widely used in materials science, bioimaging, herbal medicines, and particulate matter. [7][8][9][10][11][12][13] TOF-SIMS is also applied in the field of geochemistry. [14][15][16][17] Temperature programmed desorption (TPD), which can distinguish between types of mercury based on the characteristic pyrolysis temperature of the specific mercury form, has been used to identify Hg compounds in soil contaminates, 18 sediment samples, 19 iron-based sorbents, 20 and gypsum.…”

Section: Introductionmentioning

confidence: 99%

Mercury forms and their transformation in pyrite under weathering

Cao

Qian

Liang

et al. 2020

Surface & Interface Analysis

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Pyrite is considered to be the major carrier of mercury in coal. Here, the chemical characteristics of two natural pyrite samples of different weathering degrees were characterized by time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS). Thermal stability of Hg was also analyzed via temperature programmed desorption experiment (TPD). Characteristic ions such as S−, Fe+, FeS−, and FeS2− were detected on the surface of fresh pyrite. The release temperature of Hg ranged between 180°C and 300°C, and the characteristic peak of black HgS was recorded. In addition, abundant Fe2O3−, FeSO−, SO4−, and HSO4− were detected on the surface of weathered pyrite, and the release temperature of Hg therein was mainly distributed at 260°C to 380°C and 520°C to 600°C, corresponding to the characteristic peaks of red HgS and HgSO4, respectively. The results show that pyrite is acidified during weathering and that Hg forms in pyrite are transformed from the original state (HgS) to HgSO4.

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“…Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is a surface-sensitive analytical method. It is a powerful technique for analysing and directly mapping chemical components on the surfaces of solid samples [9][10][11][12][13][14][15]. In combination with a ToF analyser, ToF-SIMS provides several advantages compared with other mass spectrometric and surface-sensitive techniques.…”

Section: Introductionmentioning

confidence: 99%

Time-of-flight secondary ion mass spectrometry analysis of chitosan-treated viscose fibres

Finšgar

Ristić

Fardim

et al. 2018

Analytical Biochemistry

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Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was employed to analyse cellulose viscose fibres treated with different chitosan-based solutions. The analysis reports several new features in the TOF-SIMS spectra for systems with various forms of chitosan-treated surfaces. The characteristic positive ion TOF-SIMS signals for chitosan are reported at m/z 147.90, 207.07, and 221.09, and characteristic signals for trimethyl chitosan are present at m/z 58.03 and 102.09. Furthermore, new fragments were suggested to characterise acetylated chitosan molecules. The relative surface concentrations of different species were obtained based on the specific signal ratios (originating from a specific fragment and cellulose). SIMS imaging was then performed in order to investigate the surface distribution of chitosan, trimethyl chitosan, and Na-containing nanoparticles. In order to perform TOF-SIMS imaging, the above-mentioned characteristic signals were employed and m/z 22.99 was used for Na nanoparticles.

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Graphene Oxide as a Novel Evenly Continuous Phase Matrix for TOF-SIMS

Cited by 19 publications

References 42 publications

ToF-SIMS Depth Profiling of Metal, Metal Oxide, and Alloy Multilayers in Atmospheres of H₂, C₂H₂, CO, and O₂

ToF-SIMS Depth Profiling of Metal, Metal Oxide, and Alloy Multilayers in Atmospheres of H₂, C₂H₂, CO, and O₂

Mercury forms and their transformation in pyrite under weathering

Time-of-flight secondary ion mass spectrometry analysis of chitosan-treated viscose fibres

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Graphene Oxide as a Novel Evenly Continuous Phase Matrix for TOF-SIMS

Cited by 19 publications

References 42 publications

ToF-SIMS Depth Profiling of Metal, Metal Oxide, and Alloy Multilayers in Atmospheres of H2, C2H2, CO, and O2

ToF-SIMS Depth Profiling of Metal, Metal Oxide, and Alloy Multilayers in Atmospheres of H2, C2H2, CO, and O2

Mercury forms and their transformation in pyrite under weathering

Time-of-flight secondary ion mass spectrometry analysis of chitosan-treated viscose fibres

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Product

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ToF-SIMS Depth Profiling of Metal, Metal Oxide, and Alloy Multilayers in Atmospheres of H₂, C₂H₂, CO, and O₂

ToF-SIMS Depth Profiling of Metal, Metal Oxide, and Alloy Multilayers in Atmospheres of H₂, C₂H₂, CO, and O₂