Palladium Thiolate Bonding of Carbon Nanotube Thermal Interfaces

Author

• Stephen L. Hodson, Birck Nanotechnology Center, Purdue UniversityFollow
• Thiruvelu Bhuvana, Birck Nanotechnology Center, Purdue University; Indian Institute of Science, BangaloreFollow
• Baratunde A. Cola, Georgia Institute of TechnologyFollow
• Xianfan Xu, Birck Nanotechnology Center, Purdue UniversityFollow
• G. U. Kulkarni, Indian Institute of Science, BangaloreFollow
• Timothy S. Fisher, Birck Nanotechnology Center, Purdue UniversityFollow

Abstract

Carbon nanotube (CNT) arrays can be effective thermal interface materials with high compliance and conductance over a wide temperature range. Here, we study CNT interface structures in which free CNT ends are bonded using Pd hexadecanethiolate, Pd(SC(16)H(35))(2), to an opposing substrate (one-sided interface) or opposing CNT array (two-sided interface) to enhance contact conductance while maintaining a compliant joint. The Pd weld is particularly attractive for its mechanical stability at high temperatures. A transient photoacoustic (PA) method is used to measure the thermal resistance of the palladium-bonded CNT interfaces. The interfaces were bonded at moderate pressures and then tested at 34 kPa using the PA technique. At an interface temperature of approximately 250 degrees C, one-sided and two-sided palladium-bonded interfaces achieved thermal resistances near 10 mm(2) K/W and 5 mm(2) K/W, respectively. [DOI: 10.1115/1.4004094]

Keywords

carbon nanotubes; elemental semiconductors; interface structure; mechanical stability; MIS structures; organic compounds; palladium compounds; photoacoustic effect; silicon; silver; thermal conductivity; welds; CONTACT RESISTANCE; METAL; ENHANCEMENT; TRANSPORT; ARRAYS

DOI

10.1115/1.4004094

Citation

Hodson SL, Bhuvana T, Cola BA, Xu X, Kulkarni GU, Fisher TS. Palladium Thiolate Bonding of Carbon Nanotube Thermal Interfaces. ASME. J. Electron. Packag. 2011;133(2):020907-020907-6. doi:10.1115/1.4004094.

Date of this Version

6-2011

Recommended Citation

Hodson, Stephen L.; Bhuvana, Thiruvelu; Cola, Baratunde A.; Xu, Xianfan; Kulkarni, G. U.; and Fisher, Timothy S., "Palladium Thiolate Bonding of Carbon Nanotube Thermal Interfaces" (2011). Birck and NCN Publications. Paper 1003.
http://dx.doi.org/10.1115/1.4004094