Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surface Thermal Gradients Activated by Enhanced Molecular Absorption in
  Mid-infrared Vertical Antenna Arrays   We investigate local heat generation by molecules at the apex of
polymer-embedded vertical antennas excited at resonant mid-infrared
wavelengths, exploiting the surface enhanced infrared absorption (SEIRA)
effect. The embedding of vertical nanoantennas in a non-absorbing polymer
creates thermal isolation between the apical hotspot, the locus of heat
generation, and the heat sink represented by the substrate. Vibrational
mid-infrared absorption by strongly absorbing molecules located at the antenna
apex then generates nanoscale temperature gradients at the surface. We imaged
the thermal gradients by using a nano-photothermal expansion microscope, and we
found values up to 10 K/microm in conditions where the radiation wavelength
resonates with both the molecule vibrations and the plasmonic mode of the
antennas. Values up to 1000 K/microm can be foreseen at maximum quantum cascade
laser power. The presented system provides a promising thermoplasmonic platform
for antenna-assisted thermophoresis and resonant mid-infrared photocatalysis.

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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: math
4
The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: q-fin