Functional Janus structured liquids and aerogels

Ahmadreza Ghaffarkhah, Seyyed Alireza Hashemi, Farhad Ahmadijokani, Milad Goodarzi, Hossein Riazi, Sameer E. Mhatre, Orysia Zaremba, Orlando J. Rojas, Masoud Soroush, Thomas P. Russell (), Stefan Wuttke (), Milad Kamkar () and Mohammad Arjmand ()
Additional contact information
Ahmadreza Ghaffarkhah: University of British Columbia
Seyyed Alireza Hashemi: University of British Columbia
Farhad Ahmadijokani: University of British Columbia
Milad Goodarzi: University of British Columbia
Hossein Riazi: Drexel University
Sameer E. Mhatre: The University of British Columbia
Orysia Zaremba: Basque Center for Materials, Applications and Nanostructures (BCMaterials)
Orlando J. Rojas: The University of British Columbia
Masoud Soroush: Drexel University
Thomas P. Russell: University of Massachusetts Amherst
Stefan Wuttke: Basque Center for Materials, Applications and Nanostructures (BCMaterials)
Milad Kamkar: University of Waterloo
Mohammad Arjmand: University of British Columbia

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Janus structures have unique properties due to their distinct functionalities on opposing faces, but have yet to be realized with flowing liquids. We demonstrate such Janus liquids with a customizable distribution of nanoparticles (NPs) throughout their structures by joining two aqueous streams of NP dispersions in an apolar liquid. Using this anisotropic integration platform, different magnetic, conductive, or non-responsive NPs can be spatially confined to opposite sides of the original interface using magnetic graphene oxide (mGO)/GO, Ti3C2Tx/GO, or GO suspensions. The resultant Janus liquids can be used as templates for versatile, responsive, and mechanically robust aerogels suitable for piezoresistive sensing, human motion monitoring, and electromagnetic interference (EMI) shielding with a tuned absorption mechanism. The EMI shields outperform their current counterparts in terms of wave absorption, i.e., SET ≈ 51 dB, SER ≈ 0.4 dB, and A = 0.91, due to their high porosity ranging from micro- to macro-scales along with non-interfering magnetic and conductive networks imparted by the Janus architecture.

Date: 2023
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DOI: 10.1038/s41467-023-43319-7

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