In situ X-ray photoelectron spectroscopy study: effect of inert Ar sputter etching on the core-level spectra of the CVD-grown tri-layer MoS2 thin films

Jayaseelan, Vidhya Sagar; Kalaiezhily, R. K.; Shinde, Nitin Babu; Bharathi, K. Kamala; Navaneethan, M.; Eswaran, Senthil Kumar

doi:10.1007/s10854-021-06798-2

J Mater Sci: Mater Electron

2021

DOI: 10.1007/s10854-021-06798-2

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In situ X-ray photoelectron spectroscopy study: effect of inert Ar sputter etching on the core-level spectra of the CVD-grown tri-layer MoS2 thin films

Vidhya Sagar Jayaseelan

R. K. Kalaiezhily

Nitin Babu Shinde

et al.

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Cited by 6 publications

References 23 publications

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A Fully‐Bioresorbable Nanostructured Molybdenum Oxide‐Based Electrode for Continuous Multi‐Analyte Electrochemical Sensing

Fernandes,

Franceschini,

Smets

et al. 2024

Adv Materials Inter

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Bioresorbable electrochemical sensors remain mostly unexplored despite their ability to provide continuous in situ measurements of critical biomarkers. The primary challenge arises from the direct exposure of the electrodes’ thin metal films to biofluids, which poses difficulties in ensuring both proper operational lifetimes and sensing performance. Molybdenum (Mo) presents itself as a promising biometal due to its uniquely gradual dissolution in biofluids, facilitated by the formation of a slower‐dissolving MoOx surface layer. Consequently, carefully engineered MoOx films can endow transient electrochemical sensors with unparalleled stability during extended operational lifetimes. Herein an unprecedented sensor architecture achieved via the unique pairing of sputtered Mo and MoOx thin films, probed as a pH and dissolved oxygen sensor is reported. Compared to a bare Mo electrode, a bilayer Mo+MoOx electrode subjected to post‐deposition annealing (400 °C, 60 min, N2 environment) displayed a largely improved stability (>24 h) in solution and demonstrated predictable functionality during ongoing film dissolution at 37 °C. Collectively, this work establishes a pioneering strategy for the fabrication of reliable and clinically relevant implantable electrochemical sensors.

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A Fully‐Bioresorbable Nanostructured Molybdenum Oxide‐Based Electrode for Continuous Multi‐Analyte Electrochemical Sensing

Fernandes,

Franceschini,

Smets

et al. 2024

Adv Materials Inter

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V‐Shaped Heterostructure Nanocavities Array with CM and EM Coupled Enhancement for Ultra‐Sensitive SERS Substrate

Rahim,

Ma,

Saleem

et al. 2024

Advanced Science

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The field of semiconductor surface‐enhanced Raman scattering (SERS) substrates has experienced significant advancements, leading to a wide range of applications in several fields. However, the quest for new ultra‐sensitive semiconductor SERS materials is still of utmost importance. In this regard, an efficient and novel substrate, F4TCNQ/MoS2 heterostructure is introduced, assisted by V‐shaped aluminum anodic oxide (AAO) nanocavities with different depths. Utilizing the efficient charge transfer of organic/inorganic semiconducting heterostructure and the photoconfinement capability of the nanocavity structure of the AAO nanotemplate, excellent stability, fast sensing, enhanced Raman, and photodegradation activities are achieved. Due to its unique 3D structure, the optimized F4TCNQ/MoS2/AAO with 1500 nm depth achieves ultra‐high sensitivity detection of 9.0×10−16 M for conventional probe molecules. Furthermore, precise detection of water contaminants is observed for the first time with a V‐shaped heterostructure due to combined organic/inorganic features that differ significantly from conventional MoS2 structures or other metal/inorganic or inorganic/inorganic semiconductors. This research presents a novel and versatile strategy for SERS and demonstrates its diverse potential performance in practical applications.

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GeTe/MoTe₂ Van der Waals Heterostructures: Enabling Ultralow Voltage Memristors for Nonvolatile Memory and Neuromorphic Computing Applications

Khot,

Nirmal,

Dongale

et al. 2024

Small

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Advanced electronic semiconducting Van der Waals heterostructures (HSs) are promising candidates for exploring next‐generation nanoelectronics owing to their exceptional electronic properties, which present the possibility of extending their functionalities to diverse potential applications. In this study, GeTe/MoTe2 HS are explored for nonvolatile memory and neuromorphic‐computing applications. Sputter‐deposited Ag/GeTe/MoTe2/Pt HS cross‐point devices are fabricated, and they demonstrate memristor behavior at ultralow switching voltages (VSET: 0.15 V and VRESET: −0.14 V) with very low energy consumption (≈30 nJ), high memory window, long retention time (104 s), and excellent endurance (105 cycles). Resistive switching is achieved by adjusting the interface between the Ag top electrode and the heterojunction switching layer. Cross‐sectional transmission electron microscope images and conductive atomic force microscopy analysis confirm the presence of a conducting filament in the heterojunction switching layer. Further, emulating various synaptic functions of a biological synapse reveals that GeTe/MoTe2 HS can be utilized for energy‐efficient neuromorphic‐computing applications. A multilayer perceptron is implemented using the synaptic weights of the Ag/GeTe/MoTe2/Pt HS device, revealing high pattern accuracy (81.3%). These results indicate that HS devices can be considered a potential solution for high‐density memory and artificial intelligence applications.

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In situ X-ray photoelectron spectroscopy study: effect of inert Ar sputter etching on the core-level spectra of the CVD-grown tri-layer MoS2 thin films

Cited by 6 publications

References 23 publications

A Fully‐Bioresorbable Nanostructured Molybdenum Oxide‐Based Electrode for Continuous Multi‐Analyte Electrochemical Sensing

A Fully‐Bioresorbable Nanostructured Molybdenum Oxide‐Based Electrode for Continuous Multi‐Analyte Electrochemical Sensing

V‐Shaped Heterostructure Nanocavities Array with CM and EM Coupled Enhancement for Ultra‐Sensitive SERS Substrate

GeTe/MoTe₂ Van der Waals Heterostructures: Enabling Ultralow Voltage Memristors for Nonvolatile Memory and Neuromorphic Computing Applications

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In situ X-ray photoelectron spectroscopy study: effect of inert Ar sputter etching on the core-level spectra of the CVD-grown tri-layer MoS2 thin films

Cited by 6 publications

References 23 publications

A Fully‐Bioresorbable Nanostructured Molybdenum Oxide‐Based Electrode for Continuous Multi‐Analyte Electrochemical Sensing

A Fully‐Bioresorbable Nanostructured Molybdenum Oxide‐Based Electrode for Continuous Multi‐Analyte Electrochemical Sensing

V‐Shaped Heterostructure Nanocavities Array with CM and EM Coupled Enhancement for Ultra‐Sensitive SERS Substrate

GeTe/MoTe2 Van der Waals Heterostructures: Enabling Ultralow Voltage Memristors for Nonvolatile Memory and Neuromorphic Computing Applications

Contact Info

Product

Resources

About

GeTe/MoTe₂ Van der Waals Heterostructures: Enabling Ultralow Voltage Memristors for Nonvolatile Memory and Neuromorphic Computing Applications