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The method relies on the use of a parallel metal plate pen, well known from calligraphy applications, which permits controlled deposition of a continuous zinc oxide (ZnO) dual\u2010phase layer on conventional printing paper. The hand\u2010drawn ZnO film exhibits a continuous and uniform surface with a thickness of roughly 1.5 \u00b5m, allowing the application as active layer for UV sensors and field effect transistors on paper. Photocurrent generated from the UV radiation reaches values up to 3.4 mA cm<jats:sup>\u22122<\/jats:sup> with switching times on the order of few seconds. The final written paper transistors, where paper plays simultaneously the role of substrate and dielectric, reaches On\/Off current ratios (<jats:italic>I<\/jats:italic><jats:sub>On<\/jats:sub>\/<jats:italic>I<\/jats:italic><jats:sub>Off<\/jats:sub>) of about two orders of magnitude and field effect mobility close to 5 \u00d7 10<jats:sup>\u22123<\/jats:sup> cm<jats:sup>2<\/jats:sup> V<jats:sup>\u22121<\/jats:sup> s<jats:sup>\u22121<\/jats:sup>. As a final proof\u2010of\u2010concept a common source amplifier showing clear inverting characteristics is fabricated using a PoP written driving ZnO\u2010based transistor and a pencil\u2010drawn track as the load resistance.<\/jats:p>","DOI":"10.1002\/admt.201700009","type":"journal-article","created":{"date-parts":[[2017,4,18]],"date-time":"2017-04-18T04:12:40Z","timestamp":1492488760000},"source":"Crossref","is-referenced-by-count":28,"title":["Handwritten Oxide Electronics on Paper"],"prefix":"10.1002","volume":"2","author":[{"given":"Paul","family":"Grey","sequence":"first","affiliation":[{"name":"CENIMAT\/I3N Departamento de Ci\u00eancia dos Materiais Faculdade de Ci\u00eancias e Tecnologia, FCT Universidade Nova de Lisboa and CEMOP\u2010UNINOVA  Campus da Caparica 2829\u2010516 Caparica Portugal"}]},{"given":"Diana","family":"Gaspar","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N Departamento de Ci\u00eancia dos Materiais Faculdade de Ci\u00eancias e Tecnologia, FCT Universidade Nova de Lisboa and CEMOP\u2010UNINOVA  Campus da Caparica 2829\u2010516 Caparica Portugal"}]},{"given":"In\u00eas","family":"Cunha","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N Departamento de Ci\u00eancia dos Materiais Faculdade de Ci\u00eancias e Tecnologia, FCT Universidade Nova de Lisboa and CEMOP\u2010UNINOVA  Campus da Caparica 2829\u2010516 Caparica Portugal"}]},{"given":"Raquel","family":"Barras","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N Departamento de Ci\u00eancia dos Materiais Faculdade de Ci\u00eancias e Tecnologia, FCT Universidade Nova de Lisboa and CEMOP\u2010UNINOVA  Campus da Caparica 2829\u2010516 Caparica Portugal"}]},{"given":"Jos\u00e9 Tiago","family":"Carvalho","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N Departamento de Ci\u00eancia dos Materiais Faculdade de Ci\u00eancias e Tecnologia, FCT Universidade Nova de Lisboa and CEMOP\u2010UNINOVA  Campus da Caparica 2829\u2010516 Caparica Portugal"}]},{"given":"Jo\u00e3o Rafael","family":"Ribas","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N Departamento de Ci\u00eancia dos Materiais Faculdade de Ci\u00eancias e Tecnologia, FCT Universidade Nova de Lisboa and CEMOP\u2010UNINOVA  Campus da Caparica 2829\u2010516 Caparica Portugal"}]},{"given":"Elvira","family":"Fortunato","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N Departamento de Ci\u00eancia dos Materiais Faculdade de Ci\u00eancias e Tecnologia, FCT Universidade Nova de Lisboa and CEMOP\u2010UNINOVA  Campus da Caparica 2829\u2010516 Caparica Portugal"}]},{"given":"Rodrigo","family":"Martins","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N Departamento de Ci\u00eancia dos Materiais Faculdade de Ci\u00eancias e Tecnologia, FCT Universidade Nova de Lisboa and CEMOP\u2010UNINOVA  Campus da Caparica 2829\u2010516 Caparica Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8281-8663","authenticated-orcid":false,"given":"Lu\u00eds","family":"Pereira","sequence":"additional","affiliation":[{"name":"CENIMAT\/I3N Departamento de Ci\u00eancia dos Materiais Faculdade de Ci\u00eancias e Tecnologia, FCT Universidade Nova de Lisboa and CEMOP\u2010UNINOVA  Campus da Caparica 2829\u2010516 Caparica Portugal"}]}],"member":"311","published-online":{"date-parts":[[2017,4,18]]},"reference":[{"key":"e_1_2_5_1_1","first-page":"287","volume-title":"Polymer Networks: Synthesis, Properties, Theory and Applications","author":"Hoth C. 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