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Light-induced levitation of ultralight carbon aerogels via temperature control
Open accessAbstract
We demonstrate that ultralight carbon aerogels with skeletal densities lesser than the air density can levitate in air, based on Archimedes' principle, when heated with light. Porous materials, such as aerogels, facilitate the fabrication of materials with density less than that of air. However, their apparent density increases because of the air inside the materials, and therefore, they cannot levitate in air under normal conditions. Ultralight carbon aerogels, fabricated using carbon nanotubes, have excellent light absorption properties and can be quickly heated by a lamp owing to their small heat capacity. In this study, an ultralight carbon aerogel was heated with a halogen lamp and levitated in air by expanding the air inside as well as selectively reducing its density. We also show that the levitation of the ultralight carbon aerogel can be easily controlled by turning the lamp on and off. These findings are expected to be useful for various applications of aerogels, such as in communication and transportation through the sky.
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Supercapacitors are often fabricated from materials such as carbon aerogels with densities ranging from 0.182 to 0.052 g/cm3 or as low as 0.16 g/cm3.
“or supercapacitors, often fabricated from materials such as carbon aerogels with densities ranging from 0.182 to 0.052 g/cm3 (Feng et al., 2011) or according to new studies even as low as 0.16 g/cm3 (Yanagi et al., 2021)”
From Comparative analysis of energy transfer mechanisms for neural implants (2024) · cites this paper as Yanagi et al., 2021
The Introduction reports a density of 0.16 mg/cm³, not 0.16 g/cm³—a thousandfold difference—and attributes that aerogel to Sun et al. (2013). The Methods likewise report this paper’s fabricated aerogels in mg/cm³. The 0.182–0.052 g/cm³ range is cited to Feng et al., not to Yanagi et al., so it is not judged here. (LLM, conf=0.90)
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References 30 · Cited by 8
Research works printed but not linked: 28
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Metadata
- Authors
- Yanagi, R., Takemoto, R., Ono, K., & Ueno, T.
- Affiliations
- Nagoya University (JP)
- Corresponding author
- Ueno, Tomonaga
- Venue
- Scientific Reports
- Published
- 2021-06-14
- Volume
- 11
- Issue
- 1
- Pages
- 12413-12413
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC8203743
- OpenAlex
- W3172964188
- Cited by
- 8
- References
- 30
- Citations by year
- 2025: 1 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 2
- FWCI
- 0.64
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Japan Society for the Promotion of Science (19K05058)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Aerogels and thermal insulation
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Engineering › Aerospace Engineering › Aerospace Engineering and Energy Systems
- Keywords
- Archimedes' principle, carbon nanotubes, optical absorption, halogen lamp heating, temperature control, apparent density, porous media, air expansion, low-density materials
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