Supporting info for Ethanol solvation of polymer contamination in graphene solution-gated field effect transistors

S1 Supporting Information Ethanol solvation of polymer contamination in graphene solution-gated field effect transistors Juan Pedro Merino1,†, Sergi Brosel-Oliu2,†, Gemma Rius2, Xavi Illa3,2, Manuel Vázquez Sulleiro4,5, Elena del Corro6, Eduard Masvidal-Codina6,2,3, Andrea Bonnaccini Calia6, Jose Antonio Garrido6,7, Rosa Villa2,3, Anton Guimerà-Brunet2,3, Maurizio Prato1,4,8,*, Alejandro Criado5,*, Elisabet PratsAlfonso3,2,* † These authors contributed equally to this work *Correspondence: [email protected] (M.P.); [email protected] (A.C.); [email protected] (E. P-A.) Affiliations 1 Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramon 194, 20014 Donostia-San Sebastián, Spain. 2 Institute of Microelectronics of Barcelona (IMB-CNM, CSIC), Campus UAB, 08193, Bellaterra, Spain 3 Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III 4 Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 3412 7 Trieste, Italy 5 Universidade da Coruña, CICA – Centro Interdisciplinar de Química e Bioloxía, Rúa as Carballeiras, 15071 A Coruña, Spain. 6 Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona, Spain 7 ICREA Pg. Lluís Companys 23, Barcelona 08010, Spain 8 Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain Table of contents 1. XPS analysis S2 2. AFM analysis S7 3. Raman analysis S10 4. Summary Tables S11 5. Electrical Characterization S12 6. Comparative Table S13 7. References S14 S2 1. XPS análisis Figure S1. Deconvoluted C1s core levels and survey spectra respectively for epoxy resin SU-8 (a and d), epoxy resin AZ (b and e) and PMMA (c and f). AZ Su-8 PMMA AZ Su-8 PMMA S3 Figure S2. Survey spectra and deconvoluted C1s Core levels respectively of macrotransistor a, b) before and c, d) after 10 min EtOH treatment. S4 Figure S3. Survey spectra and deconvoluted C1s Core levels respectively of macrotransistor a, b) before and c, d) after 2 h EtOH treatment. S5 Figure S4. Survey spectra and deconvoluted C1s Core levels respectively of macrotransistor a, b) before and c, d) after 10 min THF treatment. S6 Figure S5. Survey spectra and deconvoluted C1s Core levels respectively of macrotransistor a, b) before and c, d) after 2h THF treatment. S7 2. AFM analysis Figure S6. AFM images of graphene surface on a macrotransistor a, b) before and d, e) after cleaning process with EtOH 10 min at different magnifications. AFM height profiles c) before and f) after cleaning process with EtOH 10 min (blue lines in b and e images respectively). Figure S7. AFM images of graphene surface on a macrotransistor a, b) before and d, e) after cleaning process with EtOH 2h min at different magnifications. AFM height profiles c) before and f) after cleaning process with EtOH 2h min (blue lines in b and e images respectively). S8 Figure S8. AFM images of graphene surface on a macrotransistor a, b) before and d, e) after cleaning process with THF 10 min at different magnifications. AFM height profiles c) before and f) after cleaning process with THF 10 min (blue lines in b and e images respectively). Figure S9. AFM images of graphene surface on a macrotransistor a, b) before and d, e) after cleaning process with THF 2h min at different magnifications. AFM height profiles c) before and f) after cleaning process with THF 2h min (blue lines in b and e images respectively). S9 Figure S10. Histogram of heights obtained from the figures S7-S10 50 µm2 AFM images for macrotransistors before and after treatment with EtOH and THF. Figure S11. AFM image of graphene surface on a macrotransistor a) detachment detail and b) profile after 10 min THF treatment.