3 research outputs found
Additional file 1 of Allicin protects against LPS-induced cardiomyocyte injury by activating Nrf2-HO-1 and inhibiting NLRP3 pathways
Supplementary Information: Representative original western blot image
Tuning the Interfacial Thermal Conductance between Polystyrene and Sapphire by Controlling the Interfacial Adhesion
In polymer-based electric microdevices,
thermal transport across polymer/ceramic interface is essential for
heat dissipation, which limits the improvement of the device performance
and lifetime. In this work, four sets of polystyrene (PS) thin films/sapphire
samples were prepared with different interface adhesion values, which
was achieved by changing the rotation speeds in the spin-coating process.
The interfacial thermal conductance (ITC) between the PS films and
the sapphire were measured by time domain thermoreflectance method,
and the interfacial adhesion between the PS films and the sapphire,
as measured by a scratch tester, was found to increase with the rotation
speed from 2000 to 8000 rpm. The ITC shows a similar dependence on
the rotation speed, increasing up to a 3-fold from 7.0 ± 1.4
to 21.0 ± 4.2 MW/(m<sup>2</sup> K). This study demonstrates the
role of spin-coating rotation speed in thermal transport across the
polymer/ceramic interfaces, evoking a much simpler mechanical method
for tuning this type of ITC. The findings of enhancement of the ITC
of polymer/ceramic interface can shed some light on the thermal management
and reliability of macro- and microelectronics, where polymeric and
hybrid organic–inorganic nano films are employed
Role of Hydrogen Bonds in Thermal Transport across Hard/Soft Material Interfaces
The
nature of the bond is a dominant factor in determining the thermal
transport across interfaces. In this paper, we study the role of the
hydrogen bond in thermal transport across interfaces between hard
and soft materials with different surface functionalizations around
room temperature using molecular dynamics simulations. Gold (Au) is
studied as the hard material, and four different types of organic
liquids with different polarizations, including hexane (C<sub>5</sub>H<sub>11</sub>CH<sub>3</sub>), hexanamine (C<sub>6</sub>H<sub>13</sub>NH<sub>2</sub>), hexanol (C<sub>6</sub>H<sub>13</sub>OH), and hexanoic
acid (C<sub>5</sub>H<sub>11</sub>COOH), are used to represent the
soft materials. To study the hydrogen bonds at the Au/organic liquid
interface, three types of thiol-terminated self-assembled monolayer
(SAM) molecules, including 1-hexanethiol [HSÂ(CH<sub>2</sub>)<sub>5</sub>CH<sub>3</sub>], 6-mercapto-1-hexanol [HSÂ(CH<sub>2</sub>)<sub>6</sub>OH], and 6-mercaptohexanoic acid [HSÂ(CH<sub>2</sub>)<sub>5</sub>COOH],
are used to functionalize the Au surface. These SAM molecules form
hydrogen bonds with the studied organic liquids with varying strengths,
which are found to significantly improve efficient interfacial thermal
transport. Detailed analyses on the molecular-level details reveal
that such efficient thermal transport originates from the collaborative
effects of the electrostatic and van der Waals portions in the hydrogen
bonds. It is found that stronger hydrogen bonds will pull the organic
molecules closer to the interface. This shorter intermolecular distance
leads to increased interatomic forces across the interfaces, which
result in larger interfacial heat flux and thus higher thermal conductance.
These results can provide important insight into the design of hard/soft
materials or structures for a wide range of applications