Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Monolayer Characteristics of Pyrene Mixed with Stearic Acid at the
  Air-Water Interface   In the present communication we report the monolayer characteristics of
pyrene mixed with stearic acid (SA) at the air-water interface. The monolayer
properties are investigated by recording and analyzing the surface
pressure-area per molecule isotherm (pi-A) of the pyrene-SA mixed films. It is
observed that the pyrene and SA are miscible in the mixed monolayer. This
miscibility/nonideality leads to phase separation between the constituent
components (pyrene and SA). BAM image of the mixed monolayer confirms the
miscibility or nonideal mixing at the mixed monolayer.

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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ph
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The categories of this paper are: solv-int