Your Clean Graphene is Still Not Clean
Abstract Researchers working with thin samples, such as monolayer graphene, are consistently struggling against contamination. Indeed, the problem of hydrocarbon contamination is known from the earliest days of electron microscopy and efforts to reduce this problem are ubiquitous to almost all high‐...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-01-01
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| Series: | Advanced Materials Interfaces |
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| Online Access: | https://doi.org/10.1002/admi.202400598 |
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| _version_ | 1841560973232570368 |
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| author | Ondrej Dyck Aisha Okmi Kai Xiao Sidong Lei Andrew R. Lupini Stephen Jesse |
| author_facet | Ondrej Dyck Aisha Okmi Kai Xiao Sidong Lei Andrew R. Lupini Stephen Jesse |
| author_sort | Ondrej Dyck |
| collection | DOAJ |
| description | Abstract Researchers working with thin samples, such as monolayer graphene, are consistently struggling against contamination. Indeed, the problem of hydrocarbon contamination is known from the earliest days of electron microscopy and efforts to reduce this problem are ubiquitous to almost all high‐vacuum experiments. Accurate knowledge of the behavior of such contamination is essential for electron beam (e‐beam) based atomic fabrication, where it is aspired to select and control matter on an atom‐by‐atom basis. Here, the vexing question of hydrocarbon contamination on graphene is taken up. Image intensity is used to directly reveal the presence of diffusing hydrocarbons on ostensibly clean graphene. These diffusing hydrocarbons are previously inferred but not directly observed. Surprising dynamic variations of the concentration of these hydrocarbons impels questions about their origin. Here, some possible explanations are presented and some tentative conclusions are drawn. This work updates the conceptual model of “clean graphene” and offers refinements to the description of e‐beam induced hydrocarbon deposition. |
| format | Article |
| id | doaj-art-7b7916cf31824e66af89fd9de9baa1f8 |
| institution | Kabale University |
| issn | 2196-7350 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj-art-7b7916cf31824e66af89fd9de9baa1f82025-01-03T08:39:29ZengWiley-VCHAdvanced Materials Interfaces2196-73502025-01-01121n/an/a10.1002/admi.202400598Your Clean Graphene is Still Not CleanOndrej Dyck0Aisha Okmi1Kai Xiao2Sidong Lei3Andrew R. Lupini4Stephen Jesse5Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37830 USADepartment of Physical Sciences Physics Division College of Science Jazan University Jazan 82817‐2820 Kingdom of Saudi ArabiaCenter for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37830 USANanoScience Technology Center University of Central Florida Orlanda FL 32826 USACenter for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37830 USACenter for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37830 USAAbstract Researchers working with thin samples, such as monolayer graphene, are consistently struggling against contamination. Indeed, the problem of hydrocarbon contamination is known from the earliest days of electron microscopy and efforts to reduce this problem are ubiquitous to almost all high‐vacuum experiments. Accurate knowledge of the behavior of such contamination is essential for electron beam (e‐beam) based atomic fabrication, where it is aspired to select and control matter on an atom‐by‐atom basis. Here, the vexing question of hydrocarbon contamination on graphene is taken up. Image intensity is used to directly reveal the presence of diffusing hydrocarbons on ostensibly clean graphene. These diffusing hydrocarbons are previously inferred but not directly observed. Surprising dynamic variations of the concentration of these hydrocarbons impels questions about their origin. Here, some possible explanations are presented and some tentative conclusions are drawn. This work updates the conceptual model of “clean graphene” and offers refinements to the description of e‐beam induced hydrocarbon deposition.https://doi.org/10.1002/admi.202400598atomic fabricationcontaminationgraphenehydrocarbonsscanning transmission electron microscope |
| spellingShingle | Ondrej Dyck Aisha Okmi Kai Xiao Sidong Lei Andrew R. Lupini Stephen Jesse Your Clean Graphene is Still Not Clean Advanced Materials Interfaces atomic fabrication contamination graphene hydrocarbons scanning transmission electron microscope |
| title | Your Clean Graphene is Still Not Clean |
| title_full | Your Clean Graphene is Still Not Clean |
| title_fullStr | Your Clean Graphene is Still Not Clean |
| title_full_unstemmed | Your Clean Graphene is Still Not Clean |
| title_short | Your Clean Graphene is Still Not Clean |
| title_sort | your clean graphene is still not clean |
| topic | atomic fabrication contamination graphene hydrocarbons scanning transmission electron microscope |
| url | https://doi.org/10.1002/admi.202400598 |
| work_keys_str_mv | AT ondrejdyck yourcleangrapheneisstillnotclean AT aishaokmi yourcleangrapheneisstillnotclean AT kaixiao yourcleangrapheneisstillnotclean AT sidonglei yourcleangrapheneisstillnotclean AT andrewrlupini yourcleangrapheneisstillnotclean AT stephenjesse yourcleangrapheneisstillnotclean |