{"_buckets": {"deposit": "71f48cd1-a550-48ed-b7a6-853c6a08ff32"}, "_deposit": {"id": "54836", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "54836"}, "status": "published"}, "_oai": {"id": "oai:tsukuba.repo.nii.ac.jp:00054836"}, "item_5_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2019-05", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "21", "bibliographicPageStart": "213501", "bibliographicVolumeNumber": "114", "bibliographic_titles": [{}, {"bibliographic_title": "Applied physics letters", "bibliographic_titleLang": "en"}]}]}, "item_5_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "A graphene-oxide-semiconductor (GOS) planar-type electron source was fabricated by direct synthesis of graphene on an oxide layer via low-pressure chemical vapor deposition. It achieved a maximum electron emission efficiency of 32.1% by suppressing the electron inelastic scattering within the topmost gate electrode using a graphene electrode. In addition, an electron emission current density of 100\u2009mA/cm2 was observed at an electron emission efficiency of 16.2%. The electron energy spread was well fitted to Maxwell-Boltzmann distribution, which indicates that the emitted electrons are the thermally equilibrium state within the electron source. The full-width at half-maximum energy spread of the emitted electrons was approximately 1.1\u2009eV. The electron emission efficiency did not deteriorate after more than 42\u2009h of direct current operation. Thus, the GOS planar-type electron source has the potential to be an excellent electron gun for electron microscopy.\nThis work was partly supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan through a Grant-in-Aid for Young Scientists (A) (Grant No. 15H05522), a Grant-in-Aid for Challenging Exploratory Research (Grant No. 16K14223), a Grant-in-Aid for Scientific Research (B) (Grant No. 18H01505), and a Grant-in-Aid for Challenging Research (Exploratory) (Grant No. 18K18910) and by Nanotech Career-up Alliance (Nanotech CUPAL). This work has been done as part of JAXA/RDD\u0027s active space-debris removal research. Support was also received from the NIMS Molecule and Material Synthesis Platform, the NIMS Microstructural Characterization Platform, the AIST Nanofabrication Platform, and the University of Tsukuba Nanofabrication Platform in the Nanotechnology Platform Project sponsored by MEXT, Japan.", "subitem_description_type": "Abstract"}]}, "item_5_publisher_27": {"attribute_name": "\u51fa\u7248\u8005", "attribute_value_mlt": [{"subitem_publisher": "AIP Publishing"}]}, "item_5_relation_11": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.1063/1.5091585", "subitem_relation_type_select": "DOI"}}]}, "item_5_rights_12": {"attribute_name": "\u6a29\u5229", "attribute_value_mlt": [{"subitem_rights": "\u00a9 2019 Author(s)."}, {"subitem_rights": "This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 114, 213501 (2019) and may be found at https://doi.org/10.1063/1.5091585."}]}, "item_5_select_15": {"attribute_name": "\u8457\u8005\u7248\u30d5\u30e9\u30b0", "attribute_value_mlt": [{"subitem_select_item": "publisher"}]}, "item_5_source_id_7": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0003-6951", "subitem_source_identifier_type": "ISSN"}]}, "item_5_source_id_9": {"attribute_name": "\u66f8\u8a8c\u30ec\u30b3\u30fc\u30c9ID", "attribute_value_mlt": [{"subitem_source_identifier": "AA00543431", "subitem_source_identifier_type": "NCID"}]}, "item_creator": {"attribute_name": "\u8457\u8005", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "\u5c71\u7530, \u6d0b\u4e00"}, {"creatorName": "\u30e4\u30de\u30c0, \u30e8\u30a6\u30a4\u30c1", "creatorNameLang": "ja-Kana"}, {"creatorName": "YAMADA, Yoichi", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "115390", "nameIdentifierScheme": "WEKO"}, 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