TITLE

Interfacial thermal conductance in spun-cast polymer films and polymer brushes

AUTHOR(S)
Losego, Mark D.; Moh, Lionel; Arpin, Kevin A.; Cahill, David G.; Braun, Paul V.
PUB. DATE
July 2010
SOURCE
Applied Physics Letters;7/5/2010, Vol. 97 Issue 1, p011908
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Interfaces between inorganic materials and anharmonic polymers have potentially intriguing thermal transport behavior. The low thermal conductivity of amorphous polymers limits significant interfacial effects to polymer film thicknesses of only a few nanometers. We use time-domain thermoreflectance to directly measure interfacial effects in the thermal conductance of spun-cast poly(methyl methacrylate) (PMMA) thin films and PMMA brushes “grafted-from” the substrate. PMMA brushes are expected to have polymer chains partially aligned perpendicular to the substrate, yet only a modest increase (13%) in thermal conductivity is observed over spun-cast layers.
ACCESSION #
52060156

 

Related Articles

  • Determination of crystallite propagation in laser annealed amorphous silicon by normal incidence spectral reflectance. Williams, G.; Sands, D.; Geatches, R. M.; Reeson, K. J. // Applied Physics Letters;9/9/1996, Vol. 69 Issue 11, p1623 

    Analysis of normal incidence spectral reflectivity of excimer laser annealed α-Si:H shows that the annealed material can be modeled as a stratified system comprising a large-grained polycrystalline layer, a fine grained polycrystalline layer, and residual amorphous silicon in agreement with...

  • Model of formation of amorphous ribbon in the process of hardening of a planar stream of melt. Levin, Yu. // Metal Science & Heat Treatment;Mar2009, Vol. 51 Issue 3/4, p146 

    Amathematical model of the process of formation of amorphous ribbon due to hardening of a planar stream of melt on the surface of a rotating drum cooler is suggested. The model is based on the use of a balance approach to solving equations of hydrodynamics and heat conduction. It makes it...

  • Universal link between the boson peak and transverse phonons in glass. Shintani, Hiroshi; Tanaka, Hajime // Nature Materials;Nov2008, Vol. 7 Issue 11, p870 

    The physical properties of a topologically disordered amorphous material (glass), such as heat capacity and thermal conductivity, are markedly different from those of its ordered crystalline counterpart. The understanding of these phenomena is a notoriously complex problem. One of the universal...

  • Thermal conductivity of the YbMgCu4 “light” heavy-fermion system. Golubkov, A. V.; Parfen’eva, L. S.; Smirnov, I. A.; Misiorek, H.; Mucha, J.; Jezowski, A. // Physics of the Solid State;Nov2007, Vol. 49 Issue 11, p2038 

    The thermal conductivity and electrical resistivity of a sample of YbMgCu4 belonging to “light” heavy-fermion compounds have been measured in the temperature range 5–300 K. The sample studied was in the region of homogeneity of this compound. It is shown that, throughout the...

  • Anisotropic thermal transport in highly ordered TiO2 nanotube arrays. Guo, Liying; Wang, Jun; Lin, Zhiqun; Gacek, Sobieslaw; Wang, Xinwei // Journal of Applied Physics;Dec2009, Vol. 106 Issue 12, p123526-1 

    This paper reports on the anisotropic thermal transport in highly ordered amorphous and anatase TiO2 nanotube arrays. Strong anisotropic thermal conductivity is observed: 0.617 W K-1 m-1 along the tube length direction and 0.077–0.102 W K-1 m-1 in the cross-tube direction for amorphous...

  • The Thermal Conductivity of Amorphous Polymers Calculated by Non-Equilibrium Molecular Dynamics Simulation. Terao, T.; Lussetti, E.; Müller-Plathe, F. // AIP Conference Proceedings;2/21/2008, Vol. 982 Issue 1, p486 

    We develop two novel non-equilibrium simulation methods which are suitable for calculation of thermal conductivity with good accuracy. These methods are based on simple algorithms, and it will be very easy to extend their range of application. In particular, there are no restrictions (from e.g....

  • Effect of microstructure on the thermal conductivity of disordered carbon. Suarez-Martinez, I.; Marks, N. A. // Applied Physics Letters;7/18/2011, Vol. 99 Issue 3, p033101 

    Computational methods are used to control the degree of structural order in a variety of carbon materials containing primarily sp2 bonding. Room-temperature thermal conductivities are computed using non-equilibrium molecular dynamics. Our results reproduce experimental data for amorphous and...

  • Improving the Power Factor and the Role of Impurity Bands. Goldsmid, H. // Journal of Electronic Materials;Jul2013, Vol. 42 Issue 7, p1482 

    The thermoelectric figure of merit, Z, is proportional to the ratio of the power factor to the thermal conductivity. In the past, efforts to improve Z have largely been directed towards reduction of the thermal conductivity by lowering the lattice component, λ. This approach has been so...

  • Thermal conductivity of solid thiophene in an incommensurate orientational state. Korolyuk, O. A.; Krivchikov, A. I.; Vdovichenko, G. A.; Romantsova, O. O.; Horbatenko, Yu. V. // Low Temperature Physics;Jan2016, Vol. 42 Issue 1, p68 

    The thermal conductivity of solid thiophene at equilibrium vapor pressure between 2K < T < 170K, has been measured in a sequence of incommensurate metastable orientationally disordered phases II, II1, II2, and II2g with different degrees of orientational ordering of the molecules. It is found...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics