The van der Waals force between arbitrary-shaped particle and a plane surface connected by a liquid bridge in humidity environment

Yang, Li; Hu, Junhui; Qin, Jie

doi:10.1007/s10035-014-0535-z

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…But a better fitting, whose slope error is only 0.62% of the experimental data, could be obtained by h = 0.11 nm. These errors might result from the nonuniformity of the adsorbed layer (less than one monolayer of water), the parameter discrepancies between the experiments and theoretical calculations, the rough correction of the van der Waals interaction, etc., and the errors would increase with the increase of the AFM tip apex radius. Therefore, apart from strictly controlling the experimental parameters and modifying the van der Waals forces, it is preferred to use a new AFM probe with a small tip apex radius to indirectly reveal the size of the water meniscus by the pull-off force.…”

Section: Results and Discussionmentioning

confidence: 99%

Prediction of Nanoscale Water Meniscus Shape between Deliquescent KDP Crystal Optics and AFM Probe for Water-Dissolution Repairing

Chen,

Zhao,

Cheng

et al. 2023

Langmuir

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Section: Results and Discussionmentioning

confidence: 99%

Prediction of Nanoscale Water Meniscus Shape between Deliquescent KDP Crystal Optics and AFM Probe for Water-Dissolution Repairing

Chen,

Zhao,

Cheng

et al. 2023

Langmuir

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“…[ 31 ] Yang et al. [ 32 ] considered the capillary bridge and further developed the total vdW force as the summation of the vdW forces in the air media

F_{vdW}^{air}

and the vdW forces in the water media

F_{vdW}^{water}

. Thus, the vdW force for each annular element is expressed as

\begin{matrix} F_{vdW}^{air} = - \frac{A_{air}}{6 π D^{3}} A_{annular} \end{matrix}

\begin{matrix} F_{vdW}^{water} = - \frac{A_{water}}{6 π D^{3}} A_{annular} \end{matrix}

where A air and A water are Hamaker constants for the dielectric/skin pair in air and water, respectively, D is the separation distance between the area element and the substrate, and A annular is the projected area of the annular element.…”

Section: Resultsmentioning

confidence: 99%

Nanotexture Shape and Surface Energy Impact on Electroadhesive Human–Machine Interface Performance

Choi

et al. 2021

Advanced Materials

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With the ubiquity of touch screens and the commercialization of electroadhesion‐based surface haptic devices, modeling tools that capture the multiphysical phenomena within the finger–device interface and their interaction are critical to design devices that achieve higher performance and reliability at lower cost. While electroadhesion has successfully demonstrated the capability to change tactile perception through friction modulation, the mechanism of electroadhesion in the finger–device interface is still unclear, partly due to the complex interfacial physics including contact deformation, capillary formation, electric field, and their complicated coupling effects that have not been addressed comprehensively. A multiphysics model is presented here to predict the friction force for finger–surface tactile interactions at the nanoscale. The nanoscopic multiphysical phenomena are coupled to study the impacts of nanotexture and surface energy in the touch interface. With macroscopic friction force measurements as verification, the model is further used to propose textures that have maximum electroadhesion effect and minimum sensitivity to relative humidity and user perspiration rate. This model can guide the performance improvement of future electroadhesion‐based surface haptic devices and other touch‐based human–machine interfaces.

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“…Therefore the Van der Waals force among nanoparticles cannot be ignored. By using the calculation method in Y. Li's research, the Van der Waals force among P25 particles in 35 wt % TiO 2 paste is approximately 1.109 times as large as that in the 34 wt % TiO 2 paste. For the 35 wt % TiO 2 paste, the closer distance and stronger interaction between TiO 2 particles make the gel point lower than that of the 34 wt % TiO 2 paste.…”

Section: Resultsmentioning

confidence: 99%

“…By using the calculationmethodinY . Lis research,[41] the Vand er Waals force among P25 particles in 35 wt %T iO 2 paste is approximately 1.109 times as large as that in the 34 wt %T iO 2 paste.F or the 35 wt %T iO 2 paste,t he closer distance and stronger interaction between TiO 2 particles make the gel point lower than that of the 34 wt %T iO 2 paste.In this case,the 35 wt % may be the critical solid content for TiO 2 particles in EGBE. Fort his reason, the viscosity increases sharply when the solid content of TiO 2 is over 35 wt %.…”

mentioning

confidence: 89%

Fabrication of Flexible Dye‐Sensitized Solar Cell Modules using Commercially Available Materials

Huang

Zhong

et al. 2016

Energy Tech

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Fully printed, flexible dye‐sensitized solar cell (DSSC) modules (10 cm×10 cm in size) were successfully fabricated by screen printing. The crucial issue and difficulty in fabrication of flexible DSSC modules is developing a binder‐free, screen‐printable TiO2 paste. Results show that the viscosity of the TiO2 paste can be adjusted by the solid content. A binder‐free, screen‐printable TiO2 paste with high viscosity was synthesized to enable the low‐temperature fabrication of the flexible DSSC modules on plastic substrates. The architecture of series connection was introduced into flexible DSSC modules to get the best module efficiency. The best power conversion efficiency of the flexible DSSC modules of 10 cm×10 cm in size with the series connection was approximately 3 %.

show abstract

The van der Waals force between arbitrary-shaped particle and a plane surface connected by a liquid bridge in humidity environment

Cited by 11 publications

References 30 publications

Prediction of Nanoscale Water Meniscus Shape between Deliquescent KDP Crystal Optics and AFM Probe for Water-Dissolution Repairing

Prediction of Nanoscale Water Meniscus Shape between Deliquescent KDP Crystal Optics and AFM Probe for Water-Dissolution Repairing

Nanotexture Shape and Surface Energy Impact on Electroadhesive Human–Machine Interface Performance

Fabrication of Flexible Dye‐Sensitized Solar Cell Modules using Commercially Available Materials

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