Polystyrene colloidal crystals: Interface controlled thermal conductivity in an open-porous mesoparticle superstructure

Nutz, Fabian A.; Ruckdeschel, Pia; Retsch, Markus

doi:10.1016/j.jcis.2015.06.022

Cited by 19 publications

(29 citation statements)

References 31 publications

(26 reference statements)

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“…The thermal conductivity of colloidal crystals is calculated from κ = αC p ρ, where C p and ρ are the heat capacity and density; α is the thermal diffusivity as determined from laser flash analysis. In general, the polymer solid particle‐based colloidal crystals have been reported with low thermal conductivity, e.g., ≈ 51 ± 6 mW m −1 K −1 for a PS colloidal crystal at 25 °C, and 84 ± 2 mW m −1 K −1 for PMMA (20 vol% n ‐butyl acrylate ( n BA)) colloidal crystal at 25 °C …”

Section: D Nanostructures For Low Thermal Conductivitymentioning

confidence: 99%

Thermal Transport in 3D Nanostructures

Zhan

Nie

Chen

et al. 2019

Adv Funct Materials

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This work summarizes the recent progress on the thermal transport properties of 3D nanostructures, with an emphasis on experimental results. Depending on the applications, different 3D nanostructures can be prepared or designed to either achieve a low thermal conductivity for thermal insulation or thermoelectric devices or a high thermal conductivity for thermal interface materials used in the continuing miniaturization of electronics. A broad range of 3D nanostructures are discussed, ranging from colloidal crystals/assemblies, array structures, holey structures, hierarchical structures, to 3D nanostructured fillers for metal matrix composites and polymer composites. Different factors that impact the thermal conductivity of these 3D structures are compared and analyzed. This work provides an overall understanding of the thermal transport properties of various 3D nanostructures, which will shed light on the thermal management at nanoscale.

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Section: D Nanostructures For Low Thermal Conductivitymentioning

confidence: 99%

Thermal Transport in 3D Nanostructures

Zhan

Nie

Chen

et al. 2019

Adv Funct Materials

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“…12 Recently, colloidal crystals have also drawn attention in the field of thermal transport in nanostructured materials. 13,14 Due to their highly-defined structure on the colloidal length scale, they can serve as a model system to get a deeper understanding of thermal transport in porous, particulate matter. Heat flow through a colloidal crystal is extremely sensitive to the size and bonding strength of the interfaces between neighbouring particles.…”

Section: Introductionmentioning

confidence: 99%

“…As we demonstrated in a recent publication on polystyrene colloidal crystals, the thermal transport in such structures is strongly governed by the small contact points between the particles. 13 These interfaces serve as geometrical constrictions for heat to travel through the material. Therefore, the size of these contact points is crucial for the thermal transport.…”

Section: Introductionmentioning

confidence: 99%

Interfacial and volumetric sensitivity of the dry sintering process of polymer colloidal crystals: a thermal transport and photonic bandgap study

Nutz

Retsch

2017

Phys. Chem. Chem. Phys.

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We introduce the in situ characterization of the dry sintering process of face-centred cubic colloidal crystals by two complementary techniques: thermal transport and photonic stopband characterization.Therefore, we employed time-dependent, isothermal laser flash analysis and specular reflectivity experiments close to the glass transition temperature of the colloidal crystal. Both methods yield distinctly different time constants of the film formation process. This discrepancy can be attributed to a volume-(photonic stopband) and interface-driven (thermal transport) sensitivity of the respective characterization method. Nevertheless, both methods yield comparable apparent activation energies.Finally, we extended the sintering process characterization to further polymer compositions, with vastly different glass transition temperatures. We could show that the film formation rate is governed by the viscoelastic properties of the polymers at the respective annealing temperature.

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“…from condensation of a surrounding gas atmosphere) affects their performance, although historically this issue has barely received attention. Other applications of CCs as membranes [55], nanostructured platforms [56,57] and templates [58,59] depend on flow and diffusion processes of liquids in nanoconfinements such as the opal interstices. Any advance in the comprehension of these features is also beneficial for fields such as colloidal assembly or capillary/evaporation-assisted lithography [60,61].…”

Section: Water In Colloidal Crystalsmentioning

confidence: 99%

“…through unsaturated soils (vadose zone) [117,127,128] or (thermal, electrical, etc.) conductivities in packed beds for technological uses [57,129]. Particles separation strongly affects the capillary force exerted by menisci and its humiditydependence [89,90] and, because the liquid fills the gaps, the intergrain friction or lubrication [130,131].…”

Section: Equilibrium Interparticle Distancementioning

confidence: 99%

Colloidal crystals and water: Perspectives on liquid–solid nanoscale phenomena in wet particulate media

Gallego-Gómez

Morales‐Flórez

Morales

et al. 2016

Advances in Colloid and Interface Science

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Solid colloidal ensembles inherently contain water adsorbed from the ambient moisture. This water, confined in the porous network formed by the building submicron spheres, greatly affects the ensemble properties. Inversely, one can benefit from such influence on collective features to explore the water behavior in such nanoconfinements. Recently, novel approaches have been developed to investigate in-depth where and how water is placed in the nanometric pores of self-assembled colloidal crystals. Here we summarize these advances, along with new ones, that are linked to general interfacial water phenomena like adsorption, capillary forces and flow. Waterdependent structural properties of the colloidal crystal give clues to the interplay between nanoconfined water and solid fine particles that determines the behavior of ensembles. We elaborate on how the knowledge gained on water in colloidal crystals provides new opportunities for multidisciplinary study of interfacial and nanoconfined liquids and their essential role in the physics of utmost important systems such as particulate media.

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Polystyrene colloidal crystals: Interface controlled thermal conductivity in an open-porous mesoparticle superstructure

Cited by 19 publications

References 31 publications

Thermal Transport in 3D Nanostructures

Thermal Transport in 3D Nanostructures

Interfacial and volumetric sensitivity of the dry sintering process of polymer colloidal crystals: a thermal transport and photonic bandgap study

Colloidal crystals and water: Perspectives on liquid–solid nanoscale phenomena in wet particulate media

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