Influence of Polymeric Residue on the Thermal Conductivity of Suspended Bilayer Graphene

Influence of Polymeric Residue on the Thermal Conductivity of Suspended Bilayer Graphene

The thermal conductivity (κ) of two bilayer graphene samples each suspended between two microresistance thermometers was measured to be 620 ± 80 and 560 ± 70 W m−1 K−1 at room temperature and exhibits a κ ∝ T 1.5 behavior at temperatures (T) between 50 and 125 K. The lower κ than that calculated for...

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Veröffentlicht in:Nano letters 2011-03, Vol.11 (3), p.1195-1200
Hauptverfasser: Pettes, Michael Thompson, Jo, Insun, Yao, Zhen, Shi, Li
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Lattice dynamics
Materials science
Phonons in low-dimensional structures and small particles
Physics
Specific materials
Thermal properties of condensed matter
Thermal properties of small particles, nanocrystals, nanotubes
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Beschreibung
Zusammenfassung:The thermal conductivity (κ) of two bilayer graphene samples each suspended between two microresistance thermometers was measured to be 620 ± 80 and 560 ± 70 W m−1 K−1 at room temperature and exhibits a κ ∝ T 1.5 behavior at temperatures (T) between 50 and 125 K. The lower κ than that calculated for suspended graphene along with the temperature dependence is attributed to scattering of phonons in the bilayer graphene by a residual polymeric layer that was clearly observed by transmission electron microscopy.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl104156y