Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Laser-Assisted Chemical Modification of Monolayer Transition Metal
  Dichalcogenides   Laser-assisted chemical modification is demonstrated on ultra-thin
transition-metal dichalcogenides (TMDs), locally replacing selenium by sulfur
atoms. The photo-conversion process takes place in a controlled reactive gas
environment and the heterogeneous reaction rates are monitored via in situ
real-time Raman and photoluminescence spectroscopies. The spatially localized
photo-conversion resulted in a heterogeneous TMD structure, with chemically
distinct domains, where the initial high crystalline quality of the film is not
affected during the process. This has been further confirmed via transmission
electron microscopy as well as Raman and Photoluminescence spatial maps. Our
study demonstrates the potential of laser-assisted chemical conversion for
on-demand synthesis of heterogeneous two-dimensional materials with
applications in nanodevices.

11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
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
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex