DOI: 10.5281/zenodo.14961797
title: Dataset of the manuscript: Rough and Tough: How particle surface roughness affects liquid marble formation and stability

description: This data publication is based on the metadata and datasets underlying the manuscript:

Rough and Tough: How particle surface roughness affects liquid marble formation and stability

Abstract:

Liquid marbles are liquid droplets encased by non-wetting particles, exhibiting elastic and non-sticking properties that enable applications such as sensors, adhesives, miniature reactors, and material carriers. The formation, stability, and properties of liquid marbles depend on the physico-chemical characteristics of the solid particles. This study systematically explores the impact of particle surface roughness on liquid marbles by employing colloidal supraparticles as well-defined model systems. Supraparticles are spherical aggregates of uniform colloidal primary particles, which enable adjusting the characteristic surface roughness by varying the primary particle size. Increasing surface roughness increases the interfacial contact angle, which, in turn, influences the mechanical properties and liquid marble stability. The presence of surface roughness increases the deformation resistance of the liquid marble, which counteracts spreading of the inner liquid upon mechanical impact, and therefore hinders rupture. The increased contact angle further enables the formation of liquid marbles from increasingly low-surface-tension organic liquids. This study thus provides detailed insights into the structure-property relationships governing the preparation of stable liquid marbles based on particle surface characteristics.

The data is organized according to the figures presented in the manuscript.

Folder '"Figure 1" contains:



High and low magnification SEM images of SP powders of 120 nm, 200 nm, 310 nm, and 485 nm roughness.

Photograph of liquid marble (LM) made from 485 nm roughness supraparticle (SP) powder.


Folder "Figure 2" contains:



Stereomicroscope images of aqueous LMs before and after drying made using SP powders of roughness 120 nm, 200 nm, 310 nm, and 485 nm.

SEM images of fixed aqueous LM interface formed from 120 nm, 200 nm, 310 nm, and 485 nm roughness SP powder and smooth particles.

Contact angle values of particles at the aqueous LM interface for SP powders of roughness 120 nm, 200 nm, 310 nm and 485 nm, and smooth particles.


Folder '"Figure 3" contains:



High and low magnification SEM images of SP powders of 120 nm, 200 nm, 310 nm, and 485 nm roughness.

Photograph of liquid marble (LM) made from 485 nm roughness supraparticle (SP) powder.


Folder '"Figure 4" contains:



SEM images of fixed organic LM interface formed from 120 nm, 200 nm, 310 nm, and 485 nm roughness SP powder and smooth particles.

Contact angle values of particles at the organic LM interface for SP powders of roughness 120 nm, 200 nm, 310 nm and 485 nm, and smooth particles.


Folder "Figure 5" contains:



Drop tests data for aqueous and organic LMs formed using 120 nm, 200 nm, 310 nm, and 485 nm roughness SP powder and smooth particles.


Folder '"Figure 6" contains:



High-speed camera videos of LMs dropped from a height of 35 mm for smooth particles and SP powders of 485 nm roughness.

Force-displacement and stress-strain data from compressive testing of LMs formed from smooth particles and SP powders of 485 nm roughness.


Folder '"Supplementary Figure S1" contains:



SEM images of 240 nm, 400 nm, 620 nm, and 970 nm diameter primary particles used to fabricate SP powders.

Particle size distributions of the 240 nm, 400 nm, 620 nm, and 970 nm diameter primary particles.


Folder "Supplementary Figure S2" contains:



High and low magnification SEM images of SP powders of 120 nm, 200 nm, 310 nm, and 485 nm roughness and smooth particles.

Particle size distributions of SP powders of 120 nm, 200 nm, 310 nm, and 485 nm roughness and smooth particles


Folder '"Supplementary Figure S7" contains:



Photographs of ruptured LMs after the drop test.


Folder '"Supplementary Figure S9" contains:



High-speed camera videos of LMs dropped from a height of 50 mm for smooth particles and SP powders of 485 nm roughness.


Folder '"Supplementary Figure S10" contains:



High-speed camera videos of LMs dropped from a height of 25 mm for smooth particles and SP powders of 485 nm roughness.

Photographs of surviving LMs after the drop test.