Agradecimentos: Authors are grateful to Fundação de Amparo à Pesquisa doEstado de São Paulo (FAPESP, grants 2011/12399-0, 2013/03487-8, 2014/16789-5; 2015/13140-0). Author also gratefuls forthe project FP7 PIRSES-2013/612267, CNPq and CAPES for financialsupport and also Profa. Mônica A. Cotta from...

Agradecimentos: Authors are grateful to Fundação de Amparo à Pesquisa doEstado de São Paulo (FAPESP, grants 2011/12399-0, 2013/03487-8, 2014/16789-5; 2015/13140-0). Author also gratefuls forthe project FP7 PIRSES-2013/612267, CNPq and CAPES for financialsupport and also Profa. Mônica A. Cotta from Instituto de Física‘‘Gleb Wataghin" (UNICAMP) for the use of the probe station inthe electrical characterization of the electrodes. D.S.C. and M. H.F. also thank financial support from MCTI-SisNano and RedeAgronano (EMBRAPA) from Brazil

Abstract: There is an increasing interest in the last years towards electronic applications of graphene-based materials and devices Fabricated from patterning techniques. with the ultimate goal of high performance and temporal resolution. Laser micromachining using femtosecond pulses is an...

Abstract: There is an increasing interest in the last years towards electronic applications of graphene-based materials and devices Fabricated from patterning techniques. with the ultimate goal of high performance and temporal resolution. Laser micromachining using femtosecond pulses is an attractive methodology to integrate graphene-based materials into functional devices as it allows changes to the focal volume with a submicrometer spatial resolution due to the efficient nonlinear nature of the absorption, yielding rapid prototyping for innovative applications. We present here the patterning of PLA-graphene films spin coated on a glass substrate using a fs-laser at moderate pulse energies to fabricate interdigitated electrodes having a minimum spatial resolution of 5 pm. Raman spectroscopy of the PLA-graphene films indicated the presence of multilayered graphene fibers. Subsequently, the PLA-graphene films were micromachined using a femtosecond laser oscillator delivering 50-fs pulses and 800 nm, where the pulse energy and scanning speed was varied in order to determine the optimum irradiation parameters (16 of and 100 mu m/s) to the fabrication of microstructures. The micromachined patterns were characterized by optical microscopy and submitted to electrical measurements in liquid samples, clearly distinguishing all tastes tested. Our results confirm the femtosecond laser micromachining technique as an interesting approach to efficiently pattern PLA-graphene filaments with high precision and minimal mechanical defects, allowing the easy fabrication of interdigitated structures and an alternative method to those produced by conventional photolithography

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2011/12399-0; 2013/03487-8; 2013/612267; 2014/16789-5; 2015/13140-0

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES

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