The influence of pressure on the reduction of the agglomeration of nanosolids: a case study for tungsten
The present work suggests a theoretical approach to reduce the agglomeration of nanoparticles by reducing the pressure below ambient. The model considers the increase in the surface energy upon reducing the pressure as an indicator for the reduction of agglomeration. This work relates the surface en...
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| Veröffentlicht in: | Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2023-09, Vol.25 (9), p.174, Article 174 |
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| creator | Abdul-Hafidh, Esam H. |
| description | The present work suggests a theoretical approach to reduce the agglomeration of nanoparticles by reducing the pressure below ambient. The model considers the increase in the surface energy upon reducing the pressure as an indicator for the reduction of agglomeration. This work relates the surface energy (
γ
) with the shape factor (
μ
) and the applied pressure. The shape factor is defined as the ratio of the surface areas of a deformed to a non-deformed sphere. This proposed model has been applied to the multiply-twinned spherical tungsten nanoparticles prepared by H. K. Kim et al. The shape factor and surface energy have been calculated for tungsten NSs that include
∼
900
-
7000
atoms. The surface energy
γ
of an NP/NS has been calculated analytically as a function of size, shape, structure, and pressure. The findings of this work show that as the fraction of the twinning volumes
(
ε
)
increases,
μ
decreases. At zero applied pressure, the surface energy has been found to decrease as size decreases for spherical NPs. However, for non-spherical NPs, the surface energy increases as size decreases. Reducing the pressure (with respect to ambient) by 30–50 kPa, the surface energies exceed their corresponding values at zero applied-pressure at all
ε
. This means that the agglomeration of nanosolids can be reduced by reducing the pressure.
Graphical Abstract |
| doi_str_mv | 10.1007/s11051-023-05821-3 |
| format | Article |
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γ
) with the shape factor (
μ
) and the applied pressure. The shape factor is defined as the ratio of the surface areas of a deformed to a non-deformed sphere. This proposed model has been applied to the multiply-twinned spherical tungsten nanoparticles prepared by H. K. Kim et al. The shape factor and surface energy have been calculated for tungsten NSs that include
∼
900
-
7000
atoms. The surface energy
γ
of an NP/NS has been calculated analytically as a function of size, shape, structure, and pressure. The findings of this work show that as the fraction of the twinning volumes
(
ε
)
increases,
μ
decreases. At zero applied pressure, the surface energy has been found to decrease as size decreases for spherical NPs. However, for non-spherical NPs, the surface energy increases as size decreases. Reducing the pressure (with respect to ambient) by 30–50 kPa, the surface energies exceed their corresponding values at zero applied-pressure at all
ε
. This means that the agglomeration of nanosolids can be reduced by reducing the pressure.
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γ
) with the shape factor (
μ
) and the applied pressure. The shape factor is defined as the ratio of the surface areas of a deformed to a non-deformed sphere. This proposed model has been applied to the multiply-twinned spherical tungsten nanoparticles prepared by H. K. Kim et al. The shape factor and surface energy have been calculated for tungsten NSs that include
∼
900
-
7000
atoms. The surface energy
γ
of an NP/NS has been calculated analytically as a function of size, shape, structure, and pressure. The findings of this work show that as the fraction of the twinning volumes
(
ε
)
increases,
μ
decreases. At zero applied pressure, the surface energy has been found to decrease as size decreases for spherical NPs. However, for non-spherical NPs, the surface energy increases as size decreases. Reducing the pressure (with respect to ambient) by 30–50 kPa, the surface energies exceed their corresponding values at zero applied-pressure at all
ε
. This means that the agglomeration of nanosolids can be reduced by reducing the pressure.
Graphical Abstract</description><subject>Agglomeration</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemistry and Materials Science</subject><subject>Deformation</subject><subject>Energy</subject><subject>Inorganic Chemistry</subject><subject>Lasers</subject><subject>Materials Science</subject><subject>Nanoparticles</subject><subject>Nanotechnology</subject><subject>Optical Devices</subject><subject>Optics</subject><subject>Photonics</subject><subject>Physical Chemistry</subject><subject>Pressure</subject><subject>Reduction</subject><subject>Research Paper</subject><subject>Shape factor</subject><subject>Surface energy</subject><subject>Surface 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influence of pressure on the reduction of the agglomeration of nanosolids: a case study for tungsten</title><author>Abdul-Hafidh, Esam H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c319t-4e797b01c01436608272de8cf72a905f52066d4d6a6baf51de56efa96fff12b93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Agglomeration</topic><topic>Characterization and Evaluation of Materials</topic><topic>Chemistry and Materials Science</topic><topic>Deformation</topic><topic>Energy</topic><topic>Inorganic Chemistry</topic><topic>Lasers</topic><topic>Materials Science</topic><topic>Nanoparticles</topic><topic>Nanotechnology</topic><topic>Optical Devices</topic><topic>Optics</topic><topic>Photonics</topic><topic>Physical Chemistry</topic><topic>Pressure</topic><topic>Reduction</topic><topic>Research Paper</topic><topic>Shape factor</topic><topic>Surface energy</topic><topic>Surface 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The model considers the increase in the surface energy upon reducing the pressure as an indicator for the reduction of agglomeration. This work relates the surface energy (
γ
) with the shape factor (
μ
) and the applied pressure. The shape factor is defined as the ratio of the surface areas of a deformed to a non-deformed sphere. This proposed model has been applied to the multiply-twinned spherical tungsten nanoparticles prepared by H. K. Kim et al. The shape factor and surface energy have been calculated for tungsten NSs that include
∼
900
-
7000
atoms. The surface energy
γ
of an NP/NS has been calculated analytically as a function of size, shape, structure, and pressure. The findings of this work show that as the fraction of the twinning volumes
(
ε
)
increases,
μ
decreases. At zero applied pressure, the surface energy has been found to decrease as size decreases for spherical NPs. However, for non-spherical NPs, the surface energy increases as size decreases. Reducing the pressure (with respect to ambient) by 30–50 kPa, the surface energies exceed their corresponding values at zero applied-pressure at all
ε
. This means that the agglomeration of nanosolids can be reduced by reducing the pressure.
Graphical Abstract</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s11051-023-05821-3</doi><orcidid>https://orcid.org/0000-0002-1145-0766</orcidid></addata></record> |
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| identifier | ISSN: 1388-0764 |
| ispartof | Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2023-09, Vol.25 (9), p.174, Article 174 |
| issn | 1388-0764 1572-896X |
| language | eng |
| recordid | cdi_proquest_journals_2852192473 |
| source | SpringerLink (Online service) |
| subjects | Agglomeration Characterization and Evaluation of Materials Chemistry and Materials Science Deformation Energy Inorganic Chemistry Lasers Materials Science Nanoparticles Nanotechnology Optical Devices Optics Photonics Physical Chemistry Pressure Reduction Research Paper Shape factor Surface energy Surface properties Tungsten |
| title | The influence of pressure on the reduction of the agglomeration of nanosolids: a case study for tungsten |
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