Projects per year
Abstract
Identifying nanoscale biomolecules in aqueous solutions by Fourier transform infrared spectroscopy (FTIR) provides an in situ and noninvasive method for exploring the structure, reactions, and transport of biologically active molecules. However, this remains a challenge due to the strong and broad IR absorption of water which overwhelms the respective vibrational fingerprints of the biomolecules. In this work, a tunable IR transparent microfluidic system with graphene plasmons is exploited to identify approximate to 2 nm-thick proteins in physiological conditions. The acquired in situ tunability makes it possible to eliminate the IR absorption of water outside the graphene plasmonic hotspots by background subtraction. Most importantly, the ultrahigh confinement of graphene plasmons (confined to approximate to 15 nm) permits the implementation of nanoscale sensitivity. Then, the deuterium effects on monolayer proteins are characterized within an aqueous solution. The tunable graphene-plasmon-enhanced FTIR technology provides a novel platform for studying biological processes in an aqueous solution at the nanoscale.
Original language | English |
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Article number | 2110525 |
Number of pages | 8 |
Journal | Advanced Materials |
Volume | 34 |
Issue number | 27 |
Early online date | 29 May 2022 |
DOIs | |
Publication status | Published - 7 Jul 2022 |
MoE publication type | A1 Journal article-refereed |
Keywords
- aqueous solutions
- biosensing
- graphene plasmons
- surface-enhanced infrared spectroscopy
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Sun, Z. (Principal investigator), Varjamo, S.-T. (Project Member), Wang, Y. (Project Member), Pelgrin, V. (Project Member), Wang, Y. (Project Member), Yoon, H. H. (Project Member), Das, S. (Project Member), Huang, Y. (Project Member), Liapis, A. (Project Member), Dai, Y. (Project Member), Mohsen, A. (Project Member), Nigmatulin, F. (Project Member), Uddin, M. (Project Member), Du, M. (Project Member), Zhang, Y. (Project Member), Arias, J. C. (Project Member), Lin, Y. (Project Member), Pajunpää, T. (Project Member), Turunen, M. (Project Member), Cui, X. (Project Member), Xing, J. (Project Member), Cheng, X. (Project Member), Kaaripuro, H. (Project Member) & Edwards, C. (Project Member)
01/09/2019 → 31/08/2025
Project: EU: ERC grants
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FEMTOCHIP: FEMTOSECOND LASER ON A CHIP
Sun, Z. (Principal investigator), Li, D. (Project Member), Liu, P. (Project Member), Das, S. (Project Member), Mohsen, A. (Project Member), Liapis, A. (Project Member), Atalaia Rosa, J. (Project Member) & Turunen, M. (Project Member)
01/03/2021 → 29/02/2024
Project: EU: Framework programmes funding
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ALDEL: Atomic-layer-deposited erbium-lasers for high-speed data centers
Sun, Z. (Principal investigator), Liu, P. (Project Member), Pakarinen, L. (Project Member), Liapis, A. (Project Member), Pelgrin, V. (Project Member), Seppänen, H. (Project Member), Atalaia Rosa, J. (Project Member), Cui, X. (Project Member), Rönn, J.-O. (Project Member), Rajamanickam, R. (Project Member) & Nigmatulin, F. (Project Member)
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Project: Business Finland: New business from research ideas (TUTLI)