Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermoresponsive stiffening with microgel particles in a semiflexible
  fibrin network   We report temperature-responsive soft composites of semiflexible biopolymer
networks (fibrin) containing dispersed microgel colloidal particles of
poly(N-isopropylacrylamide) (pNIPAM) that undergo a thermodynamically driven
de-swelling transition above a Lower Critical Solution Temperature (LCST).
Unlike standard polymer-particle composites, decreasing the inclusion volume of
the particles (by increasing temperature)is concomitant with a striking
increase of the overall elastic stiffness of the composite. We observe such a
behavior over a wide composition space. The composite elastic shear modulus
reversibly stiffens by up to 10-fold over a small change in temperature from
25-35{\deg}C. In isolation, the fibrin network and microgel suspension both
soften with increased temperature, making the stiffening of the composites
particularly significant. We hypothesize that stiffening is caused by
contracting microgel particles adsorbing on the fibrin filaments and modifying
the structure of the semiflexible network. We develop two phenomenological
models that quantify this hypothesis in physically distinct manners, and the
derived predictions are qualitatively consistent with our experimental data

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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
3
The categories of this paper are: physics
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph