An electrochemical thermal transistor.
An electrochemical thermal transistor.
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DOI:
10.1038/s41467-018-06760-7
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发表时间:
2018-10-30
影响因子:
16.6
通讯作者:
Goodson KE
中科院分区:
文献类型:
--
作者:
Sood A;Xiong F;Chen S;Wang H;Selli D;Zhang J;McClellan CJ;Sun J;Donadio D;Cui Y;Pop E;Goodson KE
The ability to actively regulate heat flow at the nanoscale could be a game changer for applications in thermal management and energy harvesting. Such a breakthrough could also enable the control of heat flow using thermal circuits, in a manner analogous to electronic circuits. Here we demonstrate switchable thermal transistors with an order of magnitude thermal on/off ratio, based on reversible electrochemical lithium intercalation in MoS2 thin films. We use spatially-resolved time-domain thermoreflectance to map the lithium ion distribution during device operation, and atomic force microscopy to show that the lithiated state correlates with increased thickness and surface roughness. First principles calculations reveal that the thermal conductance modulation is due to phonon scattering by lithium rattler modes, c-axis strain, and stacking disorder. This study lays the foundation for electrochemically-driven nanoscale thermal regulators, and establishes thermal metrology as a useful probe of spatio-temporal intercalant dynamics in nanomaterials. Thermal transistors can enable game changing applications in energy harvesting and heat routing. Here, the authors demonstrate reversible thermal modulation of nearly 10 times by ion intercalation in MoS2 nanofilms. A new thermal microscopy technique allows operando imaging of Li ion segregation.
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影响因子:
1.6
作者:
Schmidt, Aaron;Chiesa, Matteo;Chen, Gang
通讯作者:
Chen, Gang
影响因子:
1.6
作者:
Cahill, DG
通讯作者:
Cahill, DG
影响因子:
2.8
作者:
Klemens, PG
通讯作者:
Klemens, PG
影响因子:
3.7
作者:
MONKHORST, HJ;PACK, JD
通讯作者:
PACK, JD
影响因子:
56.9
作者:
Costescu, RM;Cahill, DG;George, SM
通讯作者:
George, SM