<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>27160</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>2021</volume>
    <type>image</type>
    <publisherName/>
    <publisherPlace>Bad Honnef</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-03-16</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Transitions from single-layer MoS2 to bilayer growth: A LEEM study</title>
    <abstract language="eng">Molybdenum disulfide (MoS2) is well-known to change from an indirect to a direct semiconductor as a single layer.&#13;
We present insights from in-situ low-energy electron microscopy (LEEM) on the extended growth of MoS2 on the Au(111) surface at elevated temperatures of 720°C. Our continuous growth method leads to the formation of micron-sized single-layer MoS2 islands. The single-domain character of these islands is confirmed by employing dark-field imaging and micro-diffraction (LEED). This also reveals the distribution of 90:10 of the two expected MoS2 mirror domains on Au(111). Selected-area angle-resolved photoelectron spectroscopy (ARPES) measurements of these mirror domains underline the threefold symmetry of the two mirror domains and indicate the presence of MoS2 bilayer. Using X-ray photoemission electron microscopy (XPEEM) and intensity-voltage LEEM (I(V))-LEEM we identify the bilayer nucleation areas at nearly full surface coverage and propose a model pathway for their formation.</abstract>
    <parentTitle language="eng">Verhandlungen der DPG - SurfaceScience21</parentTitle>
    <identifier type="url">https://www.dpg-verhandlungen.de/year/2021/conference/surfacescience/part/o/session/105/contribution/12</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">O 105.12</enrichment>
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    <enrichment key="opus.doi.autoCreate">false</enrichment>
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    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Francesca</firstName>
      <lastName>Genuzio</lastName>
    </author>
    <author>
      <firstName>Tevfik Onur</firstName>
      <lastName>Menteş</lastName>
    </author>
    <author>
      <firstName>Andrea</firstName>
      <lastName>Locatelli</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Molybdenum disulfide (MoS2)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Low energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Lowenergy electron diffraction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Angle-resolved photoelecton spectroscopy</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>27583</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>9</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-06-22</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">The Transition From MoS2 Single-Layer to Bilayer Growth on the Au(111) Surface</title>
    <abstract language="eng">The transition from single-layer to bilayer growth of molybdenum disulfide on the Au(111) surface is investigated by in situ low-energy electron and photoemission microscopy. By mapping the film morphology with nanometer resolution, we show that a MoS2 bilayer forms at the boundaries of single-layer single-domain MoS2 islands and next to merging islands whereas bilayer nucleation at the island centers is found to be suppressed, which may be related to the usage of dimethyl disulfide as sulfur precursor in the growth process. This approach, which may open up the possibility of growing continuous films over large areas while delaying bilayer formation, is likely transferable to other transition metal dichalcogenide model systems.</abstract>
    <parentTitle language="eng">Frontiers in Physics</parentTitle>
    <identifier type="issn">2296-424X</identifier>
    <identifier type="doi">10.3389/fphy.2021.654845</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">654845</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Nicolas</firstName>
      <lastName>Braud</lastName>
    </author>
    <author>
      <firstName>Asish K.</firstName>
      <lastName>Kundu</lastName>
    </author>
    <author>
      <firstName>Polina M.</firstName>
      <lastName>Sheverdyaeva</lastName>
    </author>
    <author>
      <firstName>Paolo</firstName>
      <lastName>Moras</lastName>
    </author>
    <author>
      <firstName>Francesca</firstName>
      <lastName>Genuzio</lastName>
    </author>
    <author>
      <firstName>Tevfik Onur</firstName>
      <lastName>Menteş</lastName>
    </author>
    <author>
      <firstName>Andrea</firstName>
      <lastName>Locatelli</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>molybdenum disulfide (MoS2)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>bilayer</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>in situ low-energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>in situ photoemission microscopy (PEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>micro-ARPES (angle-resolved photoelectron spectroscopy)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Au step bunches</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>29316</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject_noref</type>
    <publisherName>Deutsche Physikalische Gesellschaft</publisherName>
    <publisherPlace>Bad Honnef</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2022-09-27</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">On the transition from MoS2 single-layer to bilayer growth on the Au(111) surface</title>
    <abstract language="eng">MoS2 is well known for changing from an indirect to a direct band-gap semiconductor as a single layer. Here, for the model system MoS2/Au(111), we present in-situ studies of the continued growth of micron-size single-layer MoS2 islands including the first formation of bilayer patches.&#13;
&#13;
We have used angle-resolved photoemission spectroscopy from micrometer sized regions to investigate the local band structure of the islands’ rims and centers, showing a prevalence for bilayer and single-layer formation at the rims and centers, respectively. The bilayer patches can clearly be identified locally on the few nanometer scale employing intensity-voltage low-energy electron microscopy as a fingerprinting method. Astonishingly, micro-spot low-energy electron diffraction hints toward the nucleation of the second layer of the MoS2 between the single layer MoS2 and the Au(111) substrate when the step bunches formed by the single-terrace growth mechanism become sufficiently high.</abstract>
    <parentTitle language="eng">Verhandlungen der DPG</parentTitle>
    <identifier type="url">https://www.dpg-verhandlungen.de/year/2022/conference/regensburg/part/o/session/65/contribution/3</identifier>
    <enrichment key="UBICOseries">Verhandlungen der DPG</enrichment>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Francesca</firstName>
      <lastName>Genuzio</lastName>
    </author>
    <author>
      <firstName>Tevfik Onur</firstName>
      <lastName>Menteş</lastName>
    </author>
    <author>
      <firstName>Andrea</firstName>
      <lastName>Locatelli</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>angle-resolved photoemission spectroscopy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low-energy electron microscopy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>intensity-voltage</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>micro-spot low-energy electron diffraction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>step bunches</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>single-terrace growth</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>30915</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>7</pageNumber>
    <edition/>
    <issue/>
    <volume>250</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2023-05-15</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Unraveling van der Waals epitaxy: A real-time in-situ study of MoSe2 growth on graphene/Ru(0001)</title>
    <abstract language="eng">In the present work we investigate the growth of monolayer MoSe2 on selenium-intercalated graphene on Ru(0001), a model layered heterostructure combining a transition metal dichalcogenide with graphene, using low energy electron microscopy and micro-diffraction. Real-time observation of MoSe2 on graphene growth reveals the island nucleation dynamics at the nanoscale. Upon annealing, larger islands are formed by sliding and attachment of multiple nanometer-sized MoSe2 flakes. Local micro-spot angle-resolved photoemission spectroscopy reveals the electronic structure of the heterostructure, indicating that no charge transfer occurs within adjacent layers. The observed behavior is attributed to intercalation of Se at the graphene/Ru(0001) interface. The unperturbed nature of the proposed heterostructure therefore renders it as a model system for investigations of graphene supported TMD nanostructures.</abstract>
    <parentTitle language="eng">Ultramicroscopy</parentTitle>
    <identifier type="issn">0304-3991</identifier>
    <identifier type="issn">1879-2723</identifier>
    <identifier type="doi">10.1016/j.ultramic.2023.113749</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Relation">871124</enrichment>
    <enrichment key="BTUfunderName">Horizon 2020</enrichment>
    <enrichment key="Artikelnummer">113749</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Nicolas</firstName>
      <lastName>Braud</lastName>
    </author>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <author>
      <firstName>Matteo</firstName>
      <lastName>Jugovac</lastName>
    </author>
    <author>
      <firstName>Tevfik Onur</firstName>
      <lastName>Menteş</lastName>
    </author>
    <author>
      <firstName>Andrea</firstName>
      <lastName>Locatelli</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Graphene</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>transition metal dichalcogenides (TMDs)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>angle-resolved photoemission spectroscopy (ARPES)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Heterostructures</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low  energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low  energy electron diffraction (LEED)</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
</export-example>
