X-ray photoelectron spectroscopy studies of the sodium chloride surface after laser exposure

Savintsev, A. P.; Gavasheli, Yu. O.; Kalazhokov, Z. Kh.; Kalazhokov, Kh. Kh.

doi:10.1088/1742-6596/774/1/012118

Cited by 31 publications

(17 citation statements)

References 19 publications

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“…The peak positions agree with those reported in a previous work . We found a small amount of sodium by observing the peak at 1072 eV . To clarify the origin of sodium, we placed our crystals in a water bath for 2 h and retook the XPS spectra.…”

Section: Resultssupporting

confidence: 89%

Sodium-Mediated Low-Temperature Synthesis of Monolayers of Molybdenum Disulfide for Nanoscale Optoelectronic Devices

Safeer

Moutinho

Barreto

et al. 2021

ACS Appl. Nano Mater.

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Monolayers of molybdenum disulfide are of vital importance in the fabrication of optical and nanoelectronic devices. The development of thin and low-cost devices has increased the demand for synthesis processes. Usually, the synthesis of molybdenum disulfide monolayers requires temperatures of approximately 800 °C, which is a drawback for the applications mentioned above. Here, we propose a route using the atmospheric pressure chemical vapor deposition technique to grow monolayers of MoS2 at 550 °C mediated by using sodium as a catalyst. We produced single crystals and polycrystalline films by controlling the NaNO3/MoO3 catalyst/precursor ratio and the growth time. Using first-principles calculations, we determined that sodium was the nucleation site of the growth process. The precursor’s ratio is crucial to decrease the formation energy and the synthesis temperature. First-principles calculations and experiments showed that the ideal precursor ratio was 0.3 and that the synthesis temperature should be decreased by 250 °C. We investigated the monolayers with optical microscopy, high-resolution scanning transmission electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy, Raman spectroscopy, photoluminescence spectroscopy, and transport experiments. The optical and electrical performances were comparable to those of monolayers grown at higher temperatures. We believe that a low-temperature synthesis recipe is essential to drive the fabrication of nanoscale optoelectronic devices.

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Section: Resultssupporting

confidence: 89%

Sodium-Mediated Low-Temperature Synthesis of Monolayers of Molybdenum Disulfide for Nanoscale Optoelectronic Devices

Safeer

Moutinho

Barreto

et al. 2021

ACS Appl. Nano Mater.

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“…Deconvolution was performed using Microsoft Excel equipped with macros software. The C1s spectra were deconvoluted into three component peaks attributed to carbon with sp 2 hybridization (C¼C) at ~284 eV, carbon with sp 3 hybridization (C-C) at ~285 eV, and the carbonyl carbon (C¼O) at ~288 eV [40,41]. The O1s spectral peaks show two intense peaks at ~532.7 eV ascribed to oxygen double-bonded to carbon (C¼O) and oxygen single-bonded to carbon appearing at ~531.5 eV.…”

Section: Resultsmentioning

confidence: 99%

Mesostructural study on graphenic-based carbon prepared from coconut shells by heat treatment and liquid exfoliation

Ristiani

Asih

Astuti

et al. 2022

Heliyon

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“…1 d, attribute to the presence of pyridinic N and pyrrolic N, respectively. There is a high peak at 500 eV due to the auger line of sodium (Na 2 s or Na KLL ) 33 , 34 . The EDAX data is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

An electrochemical sensor for nanomolar detection of caffeine based on nicotinic acid hydrazide anchored on graphene oxide (NAHGO)

Jose

Subramanian

Shaji

et al. 2021

Sci Rep

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A simple modified sensor was developed with nicotinic acid hydrazide anchored on graphene oxide (NAHGO), by ultrasonic-assisted chemical route, using hydroxy benzotriazole as a mediator. Structural and morphologies of NAHGO samples were investigated in detail by Fourier-Transform Infrared spectroscopy (FT-IR), Powder X-ray diffraction (P-XRD), Raman spectroscopy, Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Thermogravimetric analysis (TGA). The detailed morphological examination and electrochemical studies revealed the delaminated sheet with the tube-like structure of NAHGO provided the route for more electroactive surface which influenced the electrooxidation of caffeine with increased current. The electrochemical behaviour of NAHGO on a glassy carbon electrode (GCE) for caffeine detection was demonstrated by employing voltammetric techniques. The influence of scan rate, pH, and concentration on caffeine's peak current was also studied. The NAHGO sensor was employed for the determination of caffeine in imol plus and energy drinks. The detection limit determined was 8.7 × 10–9 M, and the best value was reported so far. The results show that NAHGO modified electrodes are one of the best preferences to establish new, efficient, and reliable analytical tools for the detection of caffeine.

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X-ray photoelectron spectroscopy studies of the sodium chloride surface after laser exposure

Cited by 31 publications

References 19 publications

Sodium-Mediated Low-Temperature Synthesis of Monolayers of Molybdenum Disulfide for Nanoscale Optoelectronic Devices

Sodium-Mediated Low-Temperature Synthesis of Monolayers of Molybdenum Disulfide for Nanoscale Optoelectronic Devices

Mesostructural study on graphenic-based carbon prepared from coconut shells by heat treatment and liquid exfoliation

An electrochemical sensor for nanomolar detection of caffeine based on nicotinic acid hydrazide anchored on graphene oxide (NAHGO)

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