The Experts below are selected from a list of 147 Experts worldwide ranked by ideXlab platform

Stephen Mcdonnell - One of the best experts on this subject based on the ideXlab platform.

  • mos2 impurities chemical identification and spatial resolution of bismuth impurities in Geological Material
    Applied Surface Science, 2020
    Co-Authors: Maria Gabriela Sales, Lucas Herweyer, Elizabeth J Opila, Stephen Mcdonnell
    Abstract:

    Abstract Molybdenum disulfide (MoS2) is the most widely studied transition metal dichalcogenide (TMDC) Material, in part because it is a natural crystal present in the earth, thus making it abundant and easily accessible. Geological MoS2 has been used in various studies that look at incorporating MoS2 into devices for nanoelectronics and optoelectronics. However, variations in the electronic properties of a single MoS2 surface are known to exist due to defects that are intrinsic to natural MoS2. This work reports the presence of bismuth impurities in MoS2 with concentrations high enough to be detected by X-ray photoelectron spectroscopy (XPS). These concentrations are further corroborated with inductively coupled plasma optical emission spectroscopy (ICP-OES). Localization of these bismuth clusters is shown using XPS mapping, and the cluster size is determined to be on the order of tens of microns. This work provides important insights into the nature of impurities that are known to exist in MoS2. The presence of bismuth clusters in Geological MoS2 Material highlights the difficulty of obtaining large-area uniform and pristine MoS2 in Geological crystals.

  • mos2 impurities chemical identification and spatial resolution of bismuth impurities in Geological Material
    arXiv: Materials Science, 2019
    Co-Authors: Maria Gabriela Sales, Lucas Herweyer, Elizabeth J Opila, Stephen Mcdonnell
    Abstract:

    Molybdenum disulfide (MoS2) is the most widely studied transition metal dichalcogenide (TMDC) Material, in part because it is a natural crystal present in the earth, thus making it abundant and easily accessible. Geological MoS2 has been used in various studies that look at incorporating MoS2 into devices for nanoelectronics and optoelectronics. However, variations in the electronic properties of a single MoS2 surface are known to exist due to defects that are intrinsic to natural MoS2. This work reports the presence of bismuth impurities in MoS2 with concentrations high enough to be detected by X-ray photoelectron spectroscopy (XPS). These concentrations are further corroborated with inductively coupled plasma optical emission spectroscopy (ICP-OES). Localization of these bismuth clusters is shown using XPS-mapping, and the cluster size is determined to be on the order of tens of microns. This work provides important insights into the nature of impurities that are known to exist in MoS2.

Maria Gabriela Sales - One of the best experts on this subject based on the ideXlab platform.

  • mos2 impurities chemical identification and spatial resolution of bismuth impurities in Geological Material
    Applied Surface Science, 2020
    Co-Authors: Maria Gabriela Sales, Lucas Herweyer, Elizabeth J Opila, Stephen Mcdonnell
    Abstract:

    Abstract Molybdenum disulfide (MoS2) is the most widely studied transition metal dichalcogenide (TMDC) Material, in part because it is a natural crystal present in the earth, thus making it abundant and easily accessible. Geological MoS2 has been used in various studies that look at incorporating MoS2 into devices for nanoelectronics and optoelectronics. However, variations in the electronic properties of a single MoS2 surface are known to exist due to defects that are intrinsic to natural MoS2. This work reports the presence of bismuth impurities in MoS2 with concentrations high enough to be detected by X-ray photoelectron spectroscopy (XPS). These concentrations are further corroborated with inductively coupled plasma optical emission spectroscopy (ICP-OES). Localization of these bismuth clusters is shown using XPS mapping, and the cluster size is determined to be on the order of tens of microns. This work provides important insights into the nature of impurities that are known to exist in MoS2. The presence of bismuth clusters in Geological MoS2 Material highlights the difficulty of obtaining large-area uniform and pristine MoS2 in Geological crystals.

  • mos2 impurities chemical identification and spatial resolution of bismuth impurities in Geological Material
    arXiv: Materials Science, 2019
    Co-Authors: Maria Gabriela Sales, Lucas Herweyer, Elizabeth J Opila, Stephen Mcdonnell
    Abstract:

    Molybdenum disulfide (MoS2) is the most widely studied transition metal dichalcogenide (TMDC) Material, in part because it is a natural crystal present in the earth, thus making it abundant and easily accessible. Geological MoS2 has been used in various studies that look at incorporating MoS2 into devices for nanoelectronics and optoelectronics. However, variations in the electronic properties of a single MoS2 surface are known to exist due to defects that are intrinsic to natural MoS2. This work reports the presence of bismuth impurities in MoS2 with concentrations high enough to be detected by X-ray photoelectron spectroscopy (XPS). These concentrations are further corroborated with inductively coupled plasma optical emission spectroscopy (ICP-OES). Localization of these bismuth clusters is shown using XPS-mapping, and the cluster size is determined to be on the order of tens of microns. This work provides important insights into the nature of impurities that are known to exist in MoS2.

Neil D Gray - One of the best experts on this subject based on the ideXlab platform.

  • combining thermal hydrolysis and methylation gas chromatography mass spectrometry with x ray photoelectron spectroscopy to characterise complex organic assemblages in Geological Material
    MethodsX, 2019
    Co-Authors: Graham Purvis, Naoko Sano, Cees Van Der Land, Anders J Barlow, Elisa Lopezcapel, Peter J Cumpson, James Hood, Jake Sheriff, Neil D Gray
    Abstract:

    Abstract What follows is a method applicable generically to the analysis of low levels of organic matter that is embedded in either loose fine-grained or solid Geological Material. Initially, the range of organic compounds that could be detected in a Geological sample using conventional pyrolysis chromatography/mass spectrometry was compared to the range that was detected using thermally assisted hydrolysis and methylation-gas chromatography/mass spectrometry (THM-GC/MS). This method was used to validate the synthetic components fitted to X-ray photoelectron spectroscopy (XPS) carbon spectra of the sample. Reciprocally, XPS analysis was able to identify the constituent carbon-carbon, carbon-oxygen and carbon-nitrogen bonds of the functional groups in the compounds identified by THM-GC/MS. The two independently derived outputs from the THM-GC/MS and the XPS techniques mutually validated the identification of organic compounds in our Geological samples. We describe in detail the improvements to: • The preparation of Geological samples for analysis by XPS. • Measurements of organic Material in Geological samples using GC/MS. • The use of THM-GC/MS and XPS data used together to characterise low levels of organic Material in Geological samples.

Lucas Herweyer - One of the best experts on this subject based on the ideXlab platform.

  • mos2 impurities chemical identification and spatial resolution of bismuth impurities in Geological Material
    Applied Surface Science, 2020
    Co-Authors: Maria Gabriela Sales, Lucas Herweyer, Elizabeth J Opila, Stephen Mcdonnell
    Abstract:

    Abstract Molybdenum disulfide (MoS2) is the most widely studied transition metal dichalcogenide (TMDC) Material, in part because it is a natural crystal present in the earth, thus making it abundant and easily accessible. Geological MoS2 has been used in various studies that look at incorporating MoS2 into devices for nanoelectronics and optoelectronics. However, variations in the electronic properties of a single MoS2 surface are known to exist due to defects that are intrinsic to natural MoS2. This work reports the presence of bismuth impurities in MoS2 with concentrations high enough to be detected by X-ray photoelectron spectroscopy (XPS). These concentrations are further corroborated with inductively coupled plasma optical emission spectroscopy (ICP-OES). Localization of these bismuth clusters is shown using XPS mapping, and the cluster size is determined to be on the order of tens of microns. This work provides important insights into the nature of impurities that are known to exist in MoS2. The presence of bismuth clusters in Geological MoS2 Material highlights the difficulty of obtaining large-area uniform and pristine MoS2 in Geological crystals.

  • mos2 impurities chemical identification and spatial resolution of bismuth impurities in Geological Material
    arXiv: Materials Science, 2019
    Co-Authors: Maria Gabriela Sales, Lucas Herweyer, Elizabeth J Opila, Stephen Mcdonnell
    Abstract:

    Molybdenum disulfide (MoS2) is the most widely studied transition metal dichalcogenide (TMDC) Material, in part because it is a natural crystal present in the earth, thus making it abundant and easily accessible. Geological MoS2 has been used in various studies that look at incorporating MoS2 into devices for nanoelectronics and optoelectronics. However, variations in the electronic properties of a single MoS2 surface are known to exist due to defects that are intrinsic to natural MoS2. This work reports the presence of bismuth impurities in MoS2 with concentrations high enough to be detected by X-ray photoelectron spectroscopy (XPS). These concentrations are further corroborated with inductively coupled plasma optical emission spectroscopy (ICP-OES). Localization of these bismuth clusters is shown using XPS-mapping, and the cluster size is determined to be on the order of tens of microns. This work provides important insights into the nature of impurities that are known to exist in MoS2.

Elizabeth J Opila - One of the best experts on this subject based on the ideXlab platform.

  • mos2 impurities chemical identification and spatial resolution of bismuth impurities in Geological Material
    Applied Surface Science, 2020
    Co-Authors: Maria Gabriela Sales, Lucas Herweyer, Elizabeth J Opila, Stephen Mcdonnell
    Abstract:

    Abstract Molybdenum disulfide (MoS2) is the most widely studied transition metal dichalcogenide (TMDC) Material, in part because it is a natural crystal present in the earth, thus making it abundant and easily accessible. Geological MoS2 has been used in various studies that look at incorporating MoS2 into devices for nanoelectronics and optoelectronics. However, variations in the electronic properties of a single MoS2 surface are known to exist due to defects that are intrinsic to natural MoS2. This work reports the presence of bismuth impurities in MoS2 with concentrations high enough to be detected by X-ray photoelectron spectroscopy (XPS). These concentrations are further corroborated with inductively coupled plasma optical emission spectroscopy (ICP-OES). Localization of these bismuth clusters is shown using XPS mapping, and the cluster size is determined to be on the order of tens of microns. This work provides important insights into the nature of impurities that are known to exist in MoS2. The presence of bismuth clusters in Geological MoS2 Material highlights the difficulty of obtaining large-area uniform and pristine MoS2 in Geological crystals.

  • mos2 impurities chemical identification and spatial resolution of bismuth impurities in Geological Material
    arXiv: Materials Science, 2019
    Co-Authors: Maria Gabriela Sales, Lucas Herweyer, Elizabeth J Opila, Stephen Mcdonnell
    Abstract:

    Molybdenum disulfide (MoS2) is the most widely studied transition metal dichalcogenide (TMDC) Material, in part because it is a natural crystal present in the earth, thus making it abundant and easily accessible. Geological MoS2 has been used in various studies that look at incorporating MoS2 into devices for nanoelectronics and optoelectronics. However, variations in the electronic properties of a single MoS2 surface are known to exist due to defects that are intrinsic to natural MoS2. This work reports the presence of bismuth impurities in MoS2 with concentrations high enough to be detected by X-ray photoelectron spectroscopy (XPS). These concentrations are further corroborated with inductively coupled plasma optical emission spectroscopy (ICP-OES). Localization of these bismuth clusters is shown using XPS-mapping, and the cluster size is determined to be on the order of tens of microns. This work provides important insights into the nature of impurities that are known to exist in MoS2.