Projects per year
Here, we describe the all-aqueous bicontinuous emulsions with cholesteric liquid crystal domains through hierarchical colloidal self-assembly of nanoparticles. This is achieved by homogenization of a rod-like cellulose nanocrystal (CNC) with two immiscible, phase separating polyethylene glycol (PEG) and dextran polymer solutions. The dispersed CNCs exhibit unequal affinity for the binary polymer mixtures that depends on the balance of osmotic and chemical potential between the two phases. Once at the critical concentration, CNC particles are constrained within one component of the polymer phases and self-assemble into a cholesteric organization. The obtained liquid crystal emulsion demonstrates a confined three-dimensional percolating bicontinuous network with cholesteric self-assembly of CNC within the PEG phase; meanwhile, the nanoparticles in the dextran phase remain isotropic instead. Our results provide an alternative way to arrest bicontinuous structures through intraphase trapping and assembling of nanoparticles, which is a viable and flexible route to extend for a wide range of colloidal systems.
|Number of pages||10|
|Early online date||8 Dec 2022|
|Publication status||Published - 9 Jan 2023|
|MoE publication type||A1 Journal article-refereed|
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- 2 Active
More than Paper: Cellulose Printing for Custom-tailored Photonics
01/01/2021 → 31/12/2023
Project: Other external funding: Other foreign funding
BioELCell: Bioproducts Engineered from Lignocelluloses: from plants and upcycling to next generation materials
Rojas Gaona, O., Abidnejad, R., Ajdary, R., Bhattarai, M., Johansson, L., Robertson, D., Reyes Torres, G., Garcia Greca, L., Klockars, K., Kämäräinen, T., Zhu, Y., Zhao, B., Dufau Mattos, B., Ressouche, E., Majoinen, J. & Tardy, B.
30/07/2018 → 31/07/2023
Project: EU: ERC grants
Aalto University Reports Findings in Nanoparticles (All-Aqueous Bicontinuous Structured Liquid Crystal Emulsion through Intraphase Trapping of Cellulose Nanoparticles)
Guang Chu & Orlando Rojas Gaona
1 item of Media coverage
Press/Media: Media appearance