Improving Thermal Transport at Carbon Hybrid Interfaces by Covalent Bonds

Kabiri Samani, Majid,1976Chalmers tekniska högskola,Chalmers University of Technology (författare)

Graphene and carbon nanotubes have received much attention for thermal management application due to their unique thermal performance. Theoretical work suggests that a covalent bond can combine 1D carbon nanotubes with 2D graphene together to extend the excellent thermal property to three dimensions for heat dissipation. This paper experimentally demonstrates the high heat dissipation capability of a freestanding 3D multiwall carbon nanotube (MWCNT) and graphene hybrid material. Using high-resolution transmission electron microscopy and pulsed photothermal reﬂection measurement method, the covalent bonds between MWCNT and planar graphene are microscopically and numerically demonstrated. Thermal resistance at the junction with covalent bonds is 9×10^−10 Kelvin square meter per watt, which is three orders of magnitude lower than van der Waals contact. Joule heating method is used to verify the extra cooling effect of this 3D hybrid material compared to graphite ﬁlm. A demonstrator using high power chip is developed to demonstrate the applicability of this hybrid material in thermal application. Temperature at hot spots can be decreased by around 10°C with the assistance of this hybrid material. These ﬁndings are very signiﬁcant for understanding the thermal conduction during combining 1D and 2D carbon material together for future thermal management application.

Sun, Shuangxi,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)shuangxi (författare)
Fu, Yifeng,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)yifeng (författare)
Xu, TSoutheast University (författare)
Lilei, YeSHT Smart High-Tech AB (författare)
Satwara, Maulik,1990Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)maulik (författare)
Jeppson, Kjell,1947Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jeppson (författare)
Nilsson, Torbjörn,1962Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tornilss (författare)
Sun, LSoutheast University (författare)
Liu, Johan,1960Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jliu (författare)
Chalmers tekniska högskolaSoutheast University (creator_code:org_t)

Av författaren/redakt...: Kabiri Samani, M ...; Sun, Shuangxi, 1 ...; Fu, Yifeng, 1984; Xu, T; Lilei, Ye; Satwara, Maulik, ...; visa fler...; Jeppson, Kjell, ...; Nilsson, Torbjör ...; Sun, L; Liu, Johan, 1960; visa färre...

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