Journal
JOURNAL OF APPLIED PHYSICS
Volume 109, Issue 7, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3569862
Keywords
-
Categories
Funding
- National Science Foundation [CBET-0755825]
- DARPA NTI
- TACC Ranger [TG-CTS100078]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0755825] Funding Source: National Science Foundation
Ask authors/readers for more resources
Heat transfer across thermal interface materials is a critical issue for microelectronics thermal management. Polydimethylsiloxane (PDMS), one of the most important components of thermal interface materials presents a large barrier for heat flow due to its low thermal conductivity. In this paper, we use molecular dynamics simulations to identify the upper limit of the PDMS thermal conductivity by studying thermal transport in single PDMS chains with different lengths. We found that even individual molecular chains had low thermal conductivities (kappa similar to 7 W/mK), which is attributed to the chain segment disordering. Studies on double chain and crystalline structures reveal that the structure influences thermal transport due to inter-chain phonon scatterings and suppression of acoustic phonon modes. We also simulated amorphous bulk PDMS to identify the lower bound of PDMS thermal conductivity and found the low thermal conductivity (kappa similar to 0.2 W/mK) is mainly due to the inefficient transport mechanism through extended vibration modes. VC 2011 American Institute of Physics. [doi: 10.1063/1.3569862]
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available