Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reliable and Broad-range Thickness Determination of for Au-assisted
  Exfoliated Large Area MoS$_2$ and WS$_2$ Using Reflection Spectroscopy   The emerging Au-assisted exfoliation technique provides a wealth of
large-area and high-quality ultrathin two-dimensional (2D) materials compared
with traditional tape-based exfoliation. Fast, damage-free, and reliable
determination of the layer number of such 2D films is essential to study
layer-dependent physics and promote device applications. Here, an optical
method has been developed for simple, high throughput, and accurate
determination of the layer number for Au-assisted exfoliated MoS$_2$ and WS$_2$
films in a broad thickness range. The method is based on quantitative analysis
of layer-dependent white light reflection spectra, revealing that the
reflection peak intensity can be used as a clear indicator for determining the
layer number. The simple yet robust method will facilitate the fundamental
study on layer-dependent optical, electrical, and thermal properties and device
applications of 2D materials. The technique can also be readily combined with
photoluminescence and Raman spectroscopies to study other layer-dependent
physical properties of 2D materials.

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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci