Structural modification in swift heavy ion irradiated muscovite mica

Zhang, Shengxia; Liu, Jie; Zeng, Jian; Hu, Peipei; Zhai, Pengfei

doi:10.1088/1674-1056/26/10/106102

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…Besides, the diffraction angle of the diffraction peak corresponding to kaolinite at 12.3 • increased, indicating that the distance between the layers of kaolinite decreased, which was mainly caused by the removal of intercalated water and of hydroxyl groups between layers [29]. The diffraction peak corresponding to the muscovite at 34.9 • disappeared, indicating that part of muscovite structures was destroyed [32]. Figure 5a-c, it can be seen that the microstructure of CGCB became denser and more compacted with the increase in GO content.…”

Section: Resultsmentioning

confidence: 99%

Self-Heating Graphene Nanocomposite Bricks: A Case Study in China

Tang

Gong

et al. 2020

Materials

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In cold climate regions, the energy associated with indoor heating constitutes a large portion of energy consumption. Increasing energy utilization efficiency is critically important for both economic and environmental reasons. Directly converting electrical energy to thermal energy using joule heating construction elements can save energy and investment to the water pipelines which have been extensively used for indoor heating in China. The fired brick has been extensively used to make pavements, walls and other masonry. Taking advantage of the high dispersion quality of graphene oxide (GO) in water, as well as the firing process used to make fired bricks, graphene nanocomposite bricks with excellent electrical properties and improved mechanical performance were prepared in China. The compressive strength of the bricks showed a substantial increase from 3.15 MPa to 7.21 MPa when GO concentration was 0.1 wt.%. Through applying 5 volts of electrical field within 5 minutes, the nanocomposites can be heated from room temperature to 60 °C, 110 °C and 160 °C for the nanocomposite bricks with graphene concentration of 3 wt.%, 4 wt.% and 5 wt.%, respectively, due to the extremely low percolation threshold (~0.5 wt.%) and high conductivity (10 Ω·cm at 1 wt.%). The sheets were connected more tightly when the GO content was increased. The thermal efficiency can reach up to 88% based on the applied voltage, measured resistance and temperature rise curves.

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Section: Resultsmentioning

confidence: 99%

Self-Heating Graphene Nanocomposite Bricks: A Case Study in China

Tang

Gong

et al. 2020

Materials

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Simultaneous quantification of Young’s modulus and dispersion forces with nanoscale spatial resolution

Cafolla,

Voïtchovsky,

Payam

2023

Nanotechnology

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Many advances in polymers and layered materials rely on a precise understanding of the local interactions between adjacent molecular or atomic layers. Quantifying dispersion forces at the nanoscale is particularly challenging with existing methods often time consuming, destructive, relying on surface averaging or requiring bespoke equipment. Here, we present a non-invasive method able to quantify the local mechanical and dispersion properties of a given sample with nanometer lateral precision. The method, based on atomic force microscopy (AFM), uses the frequency shift of a vibrating AFM cantilever in combination with established contact mechanics models to simultaneously derive the Hamaker constant and the effective Young’s modulus at a given sample location. The derived Hamaker constant and Young’s modulus represent an average over a small (typically <100) molecules or atoms. The oscillation amplitude of the vibrating AFM probe is used to select the length-scale of the features to analyse, with small vibrations able to resolve the contribution of sub-nanometric defects and large ones exploring effectively homogeneous areas. The accuracy of the method is validated on a range of 2D materials in air and water as well as polymer thin films. We also provide the first experimental measurements of the Hamaker constant of HBN, MoT2, WSe2 and polymer films, verifying theoreticalpredictions and computer simulations. The simplicity and robustness of the method, implemented with a commercial AFM, may support a broad range of technological applications in the growing field of polymers and nanostructured materials where a fine control of the van der Waals interactions is crucial to tune their properties.

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Structural modification in swift heavy ion irradiated muscovite mica

Cited by 2 publications

References 26 publications

Self-Heating Graphene Nanocomposite Bricks: A Case Study in China

Self-Heating Graphene Nanocomposite Bricks: A Case Study in China

Simultaneous quantification of Young’s modulus and dispersion forces with nanoscale spatial resolution

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