Localized exciton anatomy and band gap energy modulation in 1D MoS\ :sub:`2`\  nanostructures
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*This is a summary highlighting the application of EELSFitter in this publication.
For more detail about the work presented, please refer to the publication itself* :cite:p:`vanderLippe2023`

Abstract
--------

This study presents an in-depth investigation of the electronic properties and bandgap energy distribution
in 1D molybdenum disulfide (1D-MoS\ :sub:`2`\ ) nanostructures. Through a combination of high-angle annular
dark-field scanning transmission electron microscopy (HAADF-STEM) and electron energy-loss spectroscopy (EELS),
it reveals significant differences between 1D-MoS\ :sub:`2`\  nanostructures and their 2D counterparts,
shedding light on their localized exciton behavior and their bandgap energy modulation within the nanostructures.
Excitonic peaks at around 2 and 3 eV appear localized at the ends or along the sides of the 1D-MoS\ :sub:`2`\
nanostructures, while the plasmonic resonance at 8.3 eV retains its inner-region localization. It demonstrates the
spatial dependence of the bandgap energy, with the central region exhibiting a bandgap of approximately 1.2 eV,
consistent with bulk MoS\ :sub:`2`\ , while regions characterized by curvature-induced local strain fields exhibit
instead a noticeable reduction. The findings provide valuable insights into the intricate relationship between
excitonic behavior and bandgap sensitivity in 1D-MoS\ :sub:`2`\  nanostructures, streamlining the design and
optimization of nanophotonic and optoelectronic devices.

.. _1dmos2_bandgap_maps:

.. figure:: figures/1dmos2_bandgap_maps.png
    :width: 90%
    :class: align-center
    :figwidth: 90%
    :figclass: align-center

    *Spatially-resolved band gap energy in 1D-MoS*\ :sub:`2`\  *nanostructures. The median value (second
    column) and 90% CL lower and upper bounds (first and third column, respectively) for the band gap
    energy* :math:`E_{bg}` *determined across the 1D-MoS*\ :sub:`2`\  *nanostructures considered in
    Figs. 3 (top) and 4 (bottom).*