Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Au@MoS2@WS2 Core-Shell Architectures: A Solution to Versatile Colloidal
  Suspensions of 2D Heterostructures   For years, solution processing has provided a versatile platform to extend
the applications of transition metal dichalcogenides (TMDs) beyond those
achievable with traditional preparation methods. However, existing
solution-based synthesis and exfoliation approaches are not compatible with
complex geometries, particularly when interfacial control is desired. As a
result, promising TMD structures, including MoS2/WS2 heterostructures, are
barred from the rich assembly and modification opportunities possible with
solution preparation. Here, we introduce a strategy that combines traditional
vapor phase deposition and solution chemistry to build TMD core-shell
heterostructures housed in aqueous media. We report the first synthesized TMD
core-shell heterostructure, Au@MoS2@WS2, with an Au nanoparticle core and MoS2
and WS2 shells, and provide a means of suspending the structure in solution to
allow for higher order patterning and ligand-based functionalization.
High-resolution electron microscopy and Raman spectroscopy provide detailed
analysis of the structure and interfaces of the core-shell heterostructures.
UV-vis, dynamic light scattering, and zeta potential measurements exhibit the
outstanding natural stability and monodispersity of Au@MoS2@WS2 in solution. As
a proof of concept, the aqueous environment is utilized to both functionalize
the core-shell heterostructures with electrostatic ligands and pattern them
into desired configurations on a target substrate. This work harnesses the
advantages of vapor phase preparation of nanomaterials and the functionality
possible with aqueous suspension to expand future engineering and application
opportunities of TMD heterostructures.

9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
21
The categories of this paper are: adap-org