Delamination of MoS<sub>2</sub>/SiO<sub>2</sub> interfaces under nanoindentation

Jin, Ke; Ying, Penghua; Du, Yao; Zou, Bo; Sun, Huarui; Zhang, Jin

doi:10.1039/d2cp00074a

Cited by 11 publications

(5 citation statements)

References 59 publications

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“…This observation implies that the pivotal factor influencing friction properties lies in the out-of-plane migration of Mo atoms. 32 The EDS spectra, as depicted in Figure 4, reveal the elemental composition on the DE@MoS 2 -SM microcapsules' surface. As anticipated, Mo, S, Na, Si, and O exhibited uniform distribution across the entire surface.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

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Diatomite@MoS₂ Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Lu,

Zhang,

Yin

et al. 2024

Langmuir

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Molybdenum disulfide (MoS 2 ) demonstrates promising applications in enhancing the corrosion and wear resistance of metals, but the susceptibility of this nanomaterial to agglomeration hinders its overall performance. In this study, the externally assisted corrosion inhibitor sodium molybdate (SM) was successfully constructed in diatomaceous earth (DE) and molybdenum disulfide (MoS 2 ). This not only served as a molybdenum source for MoS 2 but also enabled the preparation of DE@MoS 2 -SM microcapsules, achieving a corrosion inhibitor loading of up to 23.23%. The corrosion testing reveals that the composite coating, when compared to the pure epoxy coating, exhibits an impedance modulus 2 orders of magnitude higher (1.80 × 10 9 Ω•cm 2 ), offering prolonged protection for magnesium alloys over a 40 day period. Furthermore, a filler content of 3% sustains a coefficient of friction (COF) at 0.55 for an extended duration, indicating commendable stability and wear resistance. The protective performance is ascribed to the synergistic enhancement of corrosion and wear resistance in the coatings, facilitated by the pore structure of DE, the high hardness of MoS 2 , and the obstructive influence of Na 2 MoO 4 . This approach offers a straightforward and efficient means of designing microcapsules for use in corrosive environments, whose application can be extended in industrial fields. In particular, we promote the application of nautical instruments, underwater weapons, and seawater batteries in the shipbuilding industry and marine engineering.

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Section: ■ Results and Discussionmentioning

confidence: 98%

“…The simulated superstructure exerts a notable effect on external deformation, which diminishes with an increase in the external mismatch angle. This observation implies that the pivotal factor influencing friction properties lies in the out-of-plane migration of Mo atoms …”

Section: Resultsmentioning

confidence: 99%

Diatomite@MoS₂ Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Lu,

Zhang,

Yin

et al. 2024

Langmuir

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“…The interbody interactions are modeled using 12−6 Lennard−Jones potential whose parameters are obtained using Lorentz−Berthelot mixing rule. 53 Noose−Hoover thermostat is used to maintain the temperature of the sample and substrate at 300 K while the positions and velocities of atoms are updated every 1 fs. Open source LAMMPS 54 package is utilized for conducting MD simulations and the visualization is performed on OVITO.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…The intrabody interactions in the tip and substrate are modeled using Tersoff and Stillinger Weber potentials respectively, while a reactive potential is utilized to model the interactions in graphene (AIREBO) and MoS 2 (REBO). The interbody interactions are modeled using 12–6 Lennard–Jones potential whose parameters are obtained using Lorentz–Berthelot mixing rule . Noose–Hoover thermostat is used to maintain the temperature of the sample and substrate at 300 K while the positions and velocities of atoms are updated every 1 fs.…”

Section: Methodsmentioning

confidence: 99%

Cyclic Wear Reliability of 2D Monolayers

Barri,

Rastogi,

Islam

et al. 2024

ACS Appl. Mater. Interfaces

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Understanding wear, a critical factor impacting the reliability of mechanical systems, is vital for nano-, meso-, and macroscale applications. Due to the complex nature of nanoscale wear, the behavior of nanomaterials such as two-dimensional materials under cyclic wear and their surface damage mechanism is yet unexplored. In this study, we used atomic force microscopy coupled with molecular dynamic simulations to statistically examine the cyclic wear behavior of monolayer graphene, MoS 2 , and WSe 2 . We show that graphene displays exceptional durability and lasts over 3000 cycles at 85% of the applied critical normal load before failure, while MoS 2 and WSe 2 last only 500 cycles on average. Moreover, graphene undergoes catastrophic failure as a result of stress concentration induced by local out-of-plane deformation. In contrast, MoS 2 and WSe 2 exhibit intermittent failure, characterized by damage initiation at the edge of the wear track and subsequent propagation throughout the entire contact area. In addition to direct implications for MEMS and NEMS industries, this work can also enable the optimization of the use of 2D materials as lubricant additives on a macroscopic level.

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“…[50] The first stage of the theoretical simulation was performed with LAMMPS software [51] and based on the reported Tersoff force field, which was considered to be able to describe the structural evolution of SiO 2 during the melt-quench process to obtain a reliable amorphous SiO 2 structure. [52,53] The NVT ensemble is established by the Langevin thermostat [54] with a simulation time step of 1 fs.…”

Section: Conflict Of Interestmentioning

confidence: 99%

CO₂‐Induced Modulation of Si–O Bonds for Low Temperature Plastic Deformation of Amorphous Silica Nanoparticles with Enhanced Photoluminescence

Huang

et al. 2023

Energy & Environ Materials

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Modulation of Si–O bonds under mild conditions has been a challenging issue in the field of material science, which is critical to manufacture high‐performance silica‐based optical and photonic devices. Herein, we introduce a nondestructive technique to achieve Si–O bond rearrangement, leading to plastic deformation and photoluminescence enhancement of amorphous silica nanoparticles using supercritical carbon dioxides in EtOH/H2O solution under mild temperature. Specifically, plastic deformation is achieved by treating hollow mesoporous silica nanospheres using supercritical CO2 at 40 °C under 20 MPa. Experimental and theoretical studies revealed the critical role of supercritical CO2 in the plastic deformation process, which can be intercalated into the hollow mesoporous silica nanospheres with anisotropic stresses and induces the rearrangement of Si–O bonds and transformation of ring structures. This work suggests a novel approach to engineer high‐performance nano‐silica glass components for numerous optical and photonic devices under mild condition.

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Delamination of MoS₂/SiO₂ interfaces under nanoindentation

Abstract: Molybdenum disulfide (MoS2) mounted on silicon dioxide (SiO2) constitutes the fundamental functional components of many nanodevices, but its mechanical properties, which are crucial for the device design and fabrication, are...

Cited by 11 publications

References 59 publications

Diatomite@MoS₂ Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Diatomite@MoS₂ Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Cyclic Wear Reliability of 2D Monolayers

CO₂‐Induced Modulation of Si–O Bonds for Low Temperature Plastic Deformation of Amorphous Silica Nanoparticles with Enhanced Photoluminescence

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Delamination of MoS2/SiO2 interfaces under nanoindentation

Abstract: Molybdenum disulfide (MoS2) mounted on silicon dioxide (SiO2) constitutes the fundamental functional components of many nanodevices, but its mechanical properties, which are crucial for the device design and fabrication, are...

Cited by 11 publications

References 59 publications

Diatomite@MoS2 Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Diatomite@MoS2 Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Cyclic Wear Reliability of 2D Monolayers

CO2‐Induced Modulation of Si–O Bonds for Low Temperature Plastic Deformation of Amorphous Silica Nanoparticles with Enhanced Photoluminescence

Contact Info

Product

Resources

About

Delamination of MoS₂/SiO₂ interfaces under nanoindentation

Diatomite@MoS₂ Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Diatomite@MoS₂ Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

CO₂‐Induced Modulation of Si–O Bonds for Low Temperature Plastic Deformation of Amorphous Silica Nanoparticles with Enhanced Photoluminescence