Shape Measurement of Single Gold Nanorods in Water Using Open-access Optical Microcavities
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866917664267436032 |
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| author | Yin, Yumeng Trichet, Aurelien Qian, Jiangrui Smith, Jason |
| author_facet | Yin, Yumeng Trichet, Aurelien Qian, Jiangrui Smith, Jason |
| contents | Shape measurement of rod-shaped particles in fluids is an outstanding challenge with applications in characterising synthetic functional nanoparticles and in early warning detection of rod-shaped pathogens in water supplies. However, it is challenging to achieve accurate and real-time measurements at a single particle scale in solution with existing methods. Here we introduce a novel technique to measure the aspect ratio of rod-shaped particles by analysing changes in the polarisation state of a laser beam transmitted through an optical microcavity through which the particle diffuses. The resolution in aspect ratio measurement is found to be around 1%. Our work opens the new possibility of in-situ and single-particle shape measurements, which have promising applications in nanoparticle characterisation, water monitoring, and beyond. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_07554 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Shape Measurement of Single Gold Nanorods in Water Using Open-access Optical Microcavities Yin, Yumeng Trichet, Aurelien Qian, Jiangrui Smith, Jason Optics Shape measurement of rod-shaped particles in fluids is an outstanding challenge with applications in characterising synthetic functional nanoparticles and in early warning detection of rod-shaped pathogens in water supplies. However, it is challenging to achieve accurate and real-time measurements at a single particle scale in solution with existing methods. Here we introduce a novel technique to measure the aspect ratio of rod-shaped particles by analysing changes in the polarisation state of a laser beam transmitted through an optical microcavity through which the particle diffuses. The resolution in aspect ratio measurement is found to be around 1%. Our work opens the new possibility of in-situ and single-particle shape measurements, which have promising applications in nanoparticle characterisation, water monitoring, and beyond. |
| title | Shape Measurement of Single Gold Nanorods in Water Using Open-access Optical Microcavities |
| topic | Optics |
| url | https://arxiv.org/abs/2405.07554 |