Environmental Engineering Reference
In-Depth Information
Figure 3.17
(a)Schematicsofsingle-interfacejunctionsformedbyconnect-
ing 10-ZGNR and 17-AGNR, which have a similar width of around 2.0 nm.
The junctions can be classified into three categories in terms of the edge
shape and connection angle: (1) “ZZ120” and “ZZ60”; (2) “ZA150”, “ZA90”
and “ZA30”; and (3) “AA120” and “AA60”. (b) Thermal conductance (
σ
)as
σ
σ
0
) at 100 K
a function of temperature. (c) Thermal conductance ratios (
/
(dark blue),300 K (blue),and 500 K (red) [51].
at higher temperatures, implying that high-frequency phonons are
more affected than the low-frequency phonons. To quantify the
magnitude of thermal conductance reduction caused by the QD
structure, we calculated the ratio (
) between thermal conductance
of the QD and the ballistic thermal conductance of the thermal
η
