Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric Switching of Fluorescence Decay in Gold-Silica-Dye Nematic
  Nanocolloids Mediated by Surface Plasmons   Tunable composite materials with interesting physical behavior can be
designed through integrating unique optical properties of solid nanostructures
with the facile responses of soft matter to weak external stimuli, but this
approach remains challenged by their poorly controlled co-assembly at the
mesoscale. Using scalable wet chemical synthesis procedures, we fabricated
anisotropic gold-silica-dye colloidal nanostructures and then organized them
into the device-scale (demonstrated for square inch cells) electrically tunable
composites by simultaneously invoking molecular and colloidal self-assembly. We
show that the ensuing ordered colloidal dispersions of shape-anisotropic
nanostructures exhibit tunable fluorescence decay rates and intensity. We
characterize how these properties depend on low-voltage fields and polarization
of both the excitation and emission light, demonstrating a great potential for
the practical realization of an interesting breed of nanostructured composite
materials.

2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
9
The categories of this paper are: nlin