Scalable, Non-contact Determination of Electric Properties of Nanostructures via Electro-Rotation in Water Solution
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866911222413131776 |
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| author | Huang, Yun Xu, Kai Liang, Zexi Li, Huaizhi Zhu, Wenjuan Fan, Donglei Emma |
| author_facet | Huang, Yun Xu, Kai Liang, Zexi Li, Huaizhi Zhu, Wenjuan Fan, Donglei Emma |
| contents | Breakthroughs in nanotechnology have enabled the large-scale fabrication of nanoparticles with varied compositions and structures. Yet, evaluating their electrical conductivities remains challenging due to high volume and individual variability. We report a rapid, non-contact, and parallel method to characterize longitudinal nanostructures, including insulators, semiconductors, and conducting metal oxides by using MoO3, MoS2/MoO2, and MoS2 nanoribbons, produced at different fabrication stages, as a model system. Leveraging our semi-quantitative model based on Maxwell-Wagner and electrical double-layer polarization, electric conductivities of various nanoparticles are determined from their distinct electro-rotation behaviors in water, spanning six orders of magnitude. The results agree well with standard four-probe measurements. The technique, measuring multiple nanoparticles at once, without the use of electrical contact, can be easily scaled up for parallel determination of particles electric conductivities. These findings highlight a non-destructive, rapid, and simple characterization method promising to bring nanomaterials closer to practical applications in electronics, optics, sensing, catalysis, and robotics. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_00227 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scalable, Non-contact Determination of Electric Properties of Nanostructures via Electro-Rotation in Water Solution Huang, Yun Xu, Kai Liang, Zexi Li, Huaizhi Zhu, Wenjuan Fan, Donglei Emma Applied Physics Breakthroughs in nanotechnology have enabled the large-scale fabrication of nanoparticles with varied compositions and structures. Yet, evaluating their electrical conductivities remains challenging due to high volume and individual variability. We report a rapid, non-contact, and parallel method to characterize longitudinal nanostructures, including insulators, semiconductors, and conducting metal oxides by using MoO3, MoS2/MoO2, and MoS2 nanoribbons, produced at different fabrication stages, as a model system. Leveraging our semi-quantitative model based on Maxwell-Wagner and electrical double-layer polarization, electric conductivities of various nanoparticles are determined from their distinct electro-rotation behaviors in water, spanning six orders of magnitude. The results agree well with standard four-probe measurements. The technique, measuring multiple nanoparticles at once, without the use of electrical contact, can be easily scaled up for parallel determination of particles electric conductivities. These findings highlight a non-destructive, rapid, and simple characterization method promising to bring nanomaterials closer to practical applications in electronics, optics, sensing, catalysis, and robotics. |
| title | Scalable, Non-contact Determination of Electric Properties of Nanostructures via Electro-Rotation in Water Solution |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2508.00227 |