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Raman investigation of laser-induced structural defects of graphite oxide films
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SYSNO ASEP 0495588 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Raman investigation of laser-induced structural defects of graphite oxide films Author(s) Romano, V. (IT)
Torrisi, L. (IT)
Cutroneo, Mariapompea (UJF-V) ORCID, RID, SAI
Havránek, Vladimír (UJF-V) RID, SAI, ORCID
D'Angelo, G. (IT)Number of authors 5 Article number 04011 Source Title EPJ Web of Conferences, PPLA 2017, 167. - Les Ulis : EDP Sciences, 2018 - ISSN 2101-6275 Number of pages 5 s. Publication form Print - P Action 8th International Conference on Plasma Physics by Laser and Applications (PPLA 2017) Event date 05.07.2017 - 07.07.2017 VEvent location Messina Country IT - Italy Event type WRD Language eng - English Country FR - France Keywords graphene ; Raman spectroscopy ; graphite oxide film Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Nuclear physics R&D Projects GA16-05167S GA ČR - Czech Science Foundation (CSF) LM2015056 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UJF-V - RVO:61389005 EID SCOPUS 85040979636 DOI 10.1051/epjconf/201816704011 Annotation Since the beginning of intensive studies on graphene and graphitic materials, Raman spectroscopy has always been used as a characterisation technique. This is due to two main reasons: the non-destructive nature of this experimental technique and its ability to distinguish between the plethora of existing carbon materials. One of the most challenging research activities concerns the production of graphene microcircuits. To address this issue, a possible strategy is to directly reduce and pattern graphite oxide (GO) film by laser irradiation. The objective of this study is to evaluate the laser irradiation-induced structural changes on thin GO films by using Micro-Raman spectroscopy. We used as a source a Nd:YAG laser (1064 nm) and different laser fluences: 15 J/cm2, 7.5 J/cm2 and 5 J/cm2. We have analyzed the modifications of the main Raman contributions of these graphitic materials: the D band (defect induced band), the G band (band due to sp2 hybridized carbon atoms) and the 2D band (D band overtone). In particular, we found out that our figure of merit (FOM) parameters, i.e. the intensity ratio ID/IG (for the D band and G band) and I2D/IG (for the 2D band and G band), change with the laser fluences, revealing a different effect induced by the laser irradiation. The best results are found in the sample irradiated with 5 J/cm2, suggesting that higher fluences do not lead to better results. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2019
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