Do thermal effects cause the propulsion of bulk graphene material?

Lei Wu, Yonghao Zhang, Yian Lei, Jason M. Reese

Research output: Contribution to journalComment/debate

3 Citations (Scopus)

Abstract

In a recent article, Zhang et al.1 observed the direct propulsion of a bulk graphene sponge when exposed to laser light. They attributed this to the momentum of the light-induced ejected electrons. However, the force provided by the ejected electrons is about 2.7 × 10−11 N (supposing that the average current and the kinetic energy of the ejected electrons are 9 × 10−7 A and 70 eV, respectively), which is far smaller than the gravitational force of a 0.86 mg graphene sponge. From our knowledge of rarefied gas dynamics, the horizontal, vertical and rotational motion of the laser-illuminated graphene sponge could be due to the radiometric force.
LanguageEnglish
Pages139
Number of pages1
JournalNature Photonics
Volume10
Issue number3
DOIs
Publication statusPublished - 26 Feb 2016

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Graphite
propulsion
Thermal effects
Graphene
Propulsion
temperature effects
graphene
Electrons
causes
rarefied gas dynamics
vertical motion
electrons
Gas dynamics
Lasers
Kinetic energy
lasers
Momentum
kinetic energy
momentum

Keywords

  • thermal effects
  • graphene material
  • propulsion

Cite this

Wu, Lei ; Zhang, Yonghao ; Lei, Yian ; Reese, Jason M. / Do thermal effects cause the propulsion of bulk graphene material?. In: Nature Photonics. 2016 ; Vol. 10, No. 3. pp. 139.
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Do thermal effects cause the propulsion of bulk graphene material? / Wu, Lei; Zhang, Yonghao; Lei, Yian; Reese, Jason M.

In: Nature Photonics, Vol. 10, No. 3, 26.02.2016, p. 139.

Research output: Contribution to journalComment/debate

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T1 - Do thermal effects cause the propulsion of bulk graphene material?

AU - Wu, Lei

AU - Zhang, Yonghao

AU - Lei, Yian

AU - Reese, Jason M.

PY - 2016/2/26

Y1 - 2016/2/26

N2 - In a recent article, Zhang et al.1 observed the direct propulsion of a bulk graphene sponge when exposed to laser light. They attributed this to the momentum of the light-induced ejected electrons. However, the force provided by the ejected electrons is about 2.7 × 10−11 N (supposing that the average current and the kinetic energy of the ejected electrons are 9 × 10−7 A and 70 eV, respectively), which is far smaller than the gravitational force of a 0.86 mg graphene sponge. From our knowledge of rarefied gas dynamics, the horizontal, vertical and rotational motion of the laser-illuminated graphene sponge could be due to the radiometric force.

AB - In a recent article, Zhang et al.1 observed the direct propulsion of a bulk graphene sponge when exposed to laser light. They attributed this to the momentum of the light-induced ejected electrons. However, the force provided by the ejected electrons is about 2.7 × 10−11 N (supposing that the average current and the kinetic energy of the ejected electrons are 9 × 10−7 A and 70 eV, respectively), which is far smaller than the gravitational force of a 0.86 mg graphene sponge. From our knowledge of rarefied gas dynamics, the horizontal, vertical and rotational motion of the laser-illuminated graphene sponge could be due to the radiometric force.

KW - thermal effects

KW - graphene material

KW - propulsion

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