.png){kind=icon}
.png){kind=icon}
Return
Elasticity Mapping of Colloidal Glasses Reveals the Interplay between Mesoscopic Order and Granular Mechanics
.png){kind=icon}
OA
AI
T
M
M
M
G
B
DOI：10.1002/smtd.202400855.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Colloidal glasses (CGs) made of polymer (polymethylmethacrylate) nanoparticles are promising metamaterials for light and sound manipulation, but fabrication imperfections and fragility can limit their functionality and applications. Here, the vibrational mechanical modes of nanoparticles are probed to evaluate the nanomechanical and morphological properties of various CGs architectures. Utilizing the scanning micro-Brillouin light scattering (mu -BLS), the effective elastic constants and nanoparticles' sizes is determined as a function of position in a remote and non-destructive manner. This method is applied to CG mesostructures with different spatial distributions of their particle size and degree of order. These include CGs with single-sized systems, binary mixtures, bilayer structures, continuous gradient structures, and gradient mixtures. The microenvironments govern the local mechanical properties and highlight how the granular mesostructure can be used to develop durable functional polymer colloids. A size effect is revealed on the effective elastic constant, with the smallest particles and ordered assemblies forming robust structures, and classify the various types of mesoscale order in terms of their mechanical stiffness. The work establishes scanning mu -BLS as a tool for mapping elasticity, particle size, and local structure in complex nanostructures. The two extremes of self-assembled colloids are stiff perfect crystals and soft perfect glasses. But what happens in between? The answer is provided by elasticity mapping of a wide variety of colloidal glasses - continuous gradient structures, binary mixtures, and more - with scanning micro-Brillouin light scattering. In this way, the various types of mesoscale order are classified according to their mechanical properties. image
Keywords:
Brillouin light scattering
elasticity mapping
Gradient colloidal glasses
granular mechanics
self-assembled polymer nanoparticles
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
9.1
Papers:
4.2K
Citations:
2.2W
Organization
Cited Papers