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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2503.12580 |
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| _version_ | 1866917958872203264 |
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| author | Kistwal, Tanuja Kanhaiya, Krishan Buchmann, Adrian Ma, Chen Nikolic, Jana Ackermann, Julia Galonska, Phillip Nalige, Sanjana S. Havenith, Martina Sulpizi, Marialore Kruss, Sebastian |
| author_facet | Kistwal, Tanuja Kanhaiya, Krishan Buchmann, Adrian Ma, Chen Nikolic, Jana Ackermann, Julia Galonska, Phillip Nalige, Sanjana S. Havenith, Martina Sulpizi, Marialore Kruss, Sebastian |
| contents | Quantum friction describes the transfer of energy and momentum from electronically excited states in a material to a surrounding solvent. Here, we show that near-infrared (NIR) fluorescent single-walled carbon nanotubes (SWCNTs) exhibit quantum friction in water. The diffusion constants of functionalized SWCNTs in aqueous solution decrease linearly by around 50 % with increasing excitation power. In contrast, SWCNTs with quantum defects that localize excitons show no power-dependent diffusion. Chemical manipulation of exciton concentration by molecules that increase or decrease SWCNT fluorescence also modulate the diffusion constant by a factor of up to 2. Additionally, excitons increase the macroscopic viscosity of SWCNT solutions. Optical pump Terahertz (THz) probe spectroscopy reveals transient absorption features of water (37 /cm and above 80 /cm), indicating energy dissipation into translational modes of its hydrogen bond network. Molecular dynamics simulations further support a mechanism in which exciton-induced dipoles enhance frictional forces. These findings establish that excitons in SWCNTs induce quantum friction in water. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_12580 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Light-induced quantum friction of carbon nanotubes in water Kistwal, Tanuja Kanhaiya, Krishan Buchmann, Adrian Ma, Chen Nikolic, Jana Ackermann, Julia Galonska, Phillip Nalige, Sanjana S. Havenith, Martina Sulpizi, Marialore Kruss, Sebastian Optics Mesoscale and Nanoscale Physics Materials Science Quantum Physics Quantum friction describes the transfer of energy and momentum from electronically excited states in a material to a surrounding solvent. Here, we show that near-infrared (NIR) fluorescent single-walled carbon nanotubes (SWCNTs) exhibit quantum friction in water. The diffusion constants of functionalized SWCNTs in aqueous solution decrease linearly by around 50 % with increasing excitation power. In contrast, SWCNTs with quantum defects that localize excitons show no power-dependent diffusion. Chemical manipulation of exciton concentration by molecules that increase or decrease SWCNT fluorescence also modulate the diffusion constant by a factor of up to 2. Additionally, excitons increase the macroscopic viscosity of SWCNT solutions. Optical pump Terahertz (THz) probe spectroscopy reveals transient absorption features of water (37 /cm and above 80 /cm), indicating energy dissipation into translational modes of its hydrogen bond network. Molecular dynamics simulations further support a mechanism in which exciton-induced dipoles enhance frictional forces. These findings establish that excitons in SWCNTs induce quantum friction in water. |
| title | Light-induced quantum friction of carbon nanotubes in water |
| topic | Optics Mesoscale and Nanoscale Physics Materials Science Quantum Physics |
| url | https://arxiv.org/abs/2503.12580 |