Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large-area Epitaxial Monolayer MoS2   Two-dimensional semiconductors such as MoS2 are an emerging material family
with wide-ranging potential applications in electronics, optoelectronics and
energy harvesting. Large-area growth methods are needed to open the way to the
applications. While significant progress to this goal was made, control over
lattice orientation during growth still remains a challenge. This is needed in
order to minimize or even avoid the formation of grain boundaries which can be
detrimental to electrical, optical and mechanical properties of MoS2 and other
2D semiconductors. Here, we report on the uniform growth of high-quality
centimeter-scale continuous monolayer MoS2 with control over lattice
orientation. Using transmission electron microscopy we show that the monolayer
film is composed of coalescing single islands that share a predominant lattice
orientation due to an epitaxial growth mechanism. Raman and photoluminescence
spectra confirm the high quality of the grown material. Optical absorbance
spectra acquired over large areas show new features in the high-energy part of
the spectrum, indicating that MoS2 could also be interesting for harvesting
this region of the solar spectrum and fabrication of UV-sensitive
photodetectors. Even though the interaction between the growth substrate and
MoS2 is strong enough to induce lattice alignment, we can easily transfer the
grown material and fabricate field-effect transistors on SiO2 substrates
showing mobility superior to the exfoliated material.

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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: chem-ph