Dependence of the effective surface tension of liquid phase eutectic gallium indium on wrinkles of the surface oxide

Lee, Jongwon; Jung, Sangyun; Kim, Wonjung

doi:10.1016/j.eml.2021.101386

Cited by 10 publications

(4 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the RSH method, the sizes of the LM droplets decreased with increasing LM loading, which is because larger amounts of LM droplets passing through channels with fixed widths were subject to stronger shear forces, leading to a higher milling effect. The surface of the LM droplets produced via RSH was not smooth (Figure f,h), mimicking the wrinkled oxide structure observed on a macroscopic LM droplet under mechanical compression . This structure was probably generated during the course of shear milling, which continually caused mechanical deformation of the circulating LM droplets, consistent with the proposed mechanisms for droplet shape anisotropy.…”

Section: Resultsmentioning

confidence: 58%

“…The surface of the LM droplets produced via RSH was not smooth (Figure 1f,h), mimicking the wrinkled oxide structure observed on a macroscopic LM droplet under mechanical compression. 63 proposed mechanisms for droplet shape anisotropy. For a detailed understanding of the surface compositions, depth profile analysis was conducted by performing X-ray photoelectron spectroscopy (XPS) with Ar ion beam etching.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

High-Thermal-Conductivity and High-Fluidity Heat Transfer Emulsion with 89 wt % Suspended Liquid Metal Microdroplets

2023

View full text Add to dashboard Cite

Colloidal suspensions of thermally conductive particles in a carrier fluid are considered promising heat transfer fluids for various thermal energy transfer applications, such as transportation, plants, electronics, and renewable energy systems. The thermal conductivity (k) of the particle-suspended fluids can be improved substantially by increasing the concentration of conductive particles above a “thermal percolation threshold,” which is limited because of the vitrification of the resulting fluid at the high particle loadings. In this study, eutectic Ga–In liquid metal (LM) was employed as a soft high-k filler dispersed as microdroplets at high loadings in paraffin oil (as a carrier fluid) to produce an emulsion-type heat transfer fluid with the combined advantages of high thermal conductivity and high fluidity. Two types of the LM-in-oil emulsions, which were produced via the probe-sonication and rotor–stator homogenization (RSH) methods, demonstrated significant improvements in k, i.e., Δk ∼409 and ∼261%, respectively, at the maximum investigated LM loading of 50 vol % (∼89 wt %), attributed to the enhanced heat transport via high-k LM fillers above the percolation threshold. Despite the high filler loading, the RSH-produced emulsion retained remarkably high fluidity, with a relatively low viscosity increase and no yield stress, demonstrating its potential as a circulatable heat transfer fluid.

show abstract

Section: Resultsmentioning

confidence: 58%

Section: Resultsmentioning

confidence: 99%

High-Thermal-Conductivity and High-Fluidity Heat Transfer Emulsion with 89 wt % Suspended Liquid Metal Microdroplets

2023

View full text Add to dashboard Cite

show abstract

“…The inclusion material is Eutectic Gallium-Indium (EGaIn) with a density of 6250 kg/m 3 [38]. The surface tension of the matrix-inclusion interface is 0.6 N/m [19]. The matrix as well as the composite material is nearly incompressible and modeled as hyperelastic materials following the Neo-Hookean law.…”

Section: Quantification Of Properties Through Direct Numerical Homoge...mentioning

confidence: 99%

“…Interest in particulate composites having tiny inclusions embedded in a matrix has increased since they can be designed and manufactured to improve on a single property or multiple properties of constituents in their single-phase formats and to achieve novel physical responses or functionalities. For example, inorganic fillers are added to soft polymers to obtain composites with a combination of mechanical properties from polymers and electrical and thermal properties from inorganic fillers [8,19,35,11]. The material properties depend on the size, geometry, distribution, and aspect ratio of the inclusion materials [40].…”

Section: Introductionmentioning

confidence: 99%

Linking properties to microstructure in liquid metal embedded elastomers via machine learning

Thoopul Anantharanga

View full text Add to dashboard Cite

show abstract

Electrochemical Oxidation to Fabricate Micro‐Nano‐Scale Surface Wrinkling of Liquid Metals

Zhou

Xing

Wang

et al. 2023

Small

View full text Add to dashboard Cite

Constructing wrinkled structures on the surface of materials to obtain new functions has broad application prospects. Here a generalized method is reported to fabricate multi‐scale and diverse‐dimensional oxide wrinkles on liquid metal surfaces by an electrochemical anodization method. The oxide film on the surface of the liquid metal is successfully thickened to hundreds of nanometers by electrochemical anodization, and then the micro‐wrinkles with height differences of several hundred nanometers are obtained by the growth stress. It is succeeded in altering the distribution of growth stress by changing the substrate geometry to induce different wrinkle morphologies, such as one‐dimensional striped wrinkles and two‐dimensional labyrinth wrinkles. Further, radial wrinkles are obtained under the hoop stress induced by the difference in surface tensions. These hierarchical wrinkles of different scales can exist on the liquid metal surface simultaneously. Surface wrinkles of liquid metal may have potential applications in the future for flexible electronics, sensors, displays, and so on.

show abstract

Dependence of the effective surface tension of liquid phase eutectic gallium indium on wrinkles of the surface oxide

Cited by 10 publications

References 35 publications

High-Thermal-Conductivity and High-Fluidity Heat Transfer Emulsion with 89 wt % Suspended Liquid Metal Microdroplets

High-Thermal-Conductivity and High-Fluidity Heat Transfer Emulsion with 89 wt % Suspended Liquid Metal Microdroplets

Linking properties to microstructure in liquid metal embedded elastomers via machine learning

Electrochemical Oxidation to Fabricate Micro‐Nano‐Scale Surface Wrinkling of Liquid Metals

Contact Info

Product

Resources

About