1 research outputs found
Ultralow Thermal Conductivity of Atomic/Molecular Layer-Deposited Hybrid Organic–Inorganic Zincone Thin Films
Atomic layer deposition (ALD) and
molecular layer deposition (MLD)
techniques with atomic level control enable a new class of hybrid
organic–inorganic materials with improved functionality. In
this work, the cross-plane thermal conductivity and volumetric heat
capacity of three types of hybrid organic–inorganic zincone
thin films enabled by MLD processes and alternate ALD–MLD processes
were measured using the frequency-dependent time-domain thermoreflectance
method. We revealed the critical role of backbone flexibility in the
structural morphology and thermal conductivity of MLD zincone thin
films by comparing the thermal conductivity of MLD zincone films with
an aliphatic backbone to that with aromatic backbone. Much lower thermal
conductivity values were obtained in ALD/MLD-enabled hybrid organic–inorganic
zincone thin films compared to that of the ALD-enabled W/Al<sub>2</sub>O<sub>3</sub> nanolaminates reported by Costescu et al. [<i>Science</i> <b>2004</b>, <i>303</i>, 989–990],
which suggests that the dramatic material difference between organic
and inorganic materials may provide a route for producing materials
with ultralow thermal conductivity