Femtosecond-laser direct writing for spatially localized synthesis of PPV

Avila, Oriana; Almeida, Juliana M. P.; Henrique, Franciele Renata; Fonseca, Ruben D.; Almeida, Guilherme Silva de; Balogh, Débora Terezia

doi:10.1039/c7tc00079k

Cited by 3 publications

(4 citation statements)

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“…3c, the salient Raman signals recorded at 1175 cm −1 , 1597 cm −1 and 1629 cm −1 matched literature reports for PPV. 30,42 A powder X-ray diffraction analysis revealed that the oxidized product was highly crystalline, 43 as indicated by the strong signal observed at 18.5°, and the broad signal recorded between 20°and 35°was agreement with literature data for PPV ( Fig. 3d).…”

Section: View Article Onlinesupporting

confidence: 88%

“…For example, Mendonça described the synthesis of spatially resolved PPV by applying laser pulses to films of poly(xylyliden tetrahydrothiophenium chloride). 30 Photon absorption was shown to result in a photothermal reaction that facilitated the elimination of reactive byproducts, including sulfonium leaving groups and hydrochloric acid, and afforded PPV with a higher conjugation length than analogues prepared using conventional thermalbased approaches.…”

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confidence: 99%

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Direct laser writing of poly(phenylene vinylene) on poly(barrelene)

2020

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Section: View Article Onlinesupporting

confidence: 88%

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confidence: 99%

Direct laser writing of poly(phenylene vinylene) on poly(barrelene)

2020

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“…So far, much effort has been devoted to produce diverse Au NPs, such as chemical reduction, electrochemical deposition, and film thermal treatment [9][10][11]. Besides, because of the unique interaction mechanism between femtosecond laser and materials (different from traditional laser or sun light), femtosecond laser created a lot of exciting new possibilities in micro/nano structure fabrication [12][13][14][15][16]. In general, two primary methods (top-down and bottom-up) are currently available for fabricating Au NPs by femtosecond laser.…”

Section: Introductionmentioning

confidence: 99%

Shaped femtosecond laser induced photoreduction for highly controllable Au nanoparticles based on localized field enhancement and their SERS applications

Jiang

et al. 2020

Nanophotonics

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Gold nanoparticles (Au NPs) have a wide range of applications because of their localized surface plasmon resonance properties. Femtosecond laser is considered to be an effective method for preparing Au NPs because of its characteristics of ultrashort irradiation periods and ultrahigh intensities. In this study, a novel method is proposed to produce an Au NP-attached substrate using the spatially and temporally shaped femtosecond laser. Laser-induced periodic surface structures (LIPSS) are designed to obtain the localized optical field enhancement, which leads to the femtosecond laser spatially reshaping, enabling the deposition of Au NPs by photoreduction on silicon substrates. The Au NPs prepared by this method exhibit morphological controllability and chemical stability, especially excellent spatial selectivity and uniformity, resulting in the tunable and stable surface-enhanced Raman scattering (SERS) applications. Also, the temporally shaped femtosecond pulses are introduced to further increase the enhancement factors of the SERS. This method successfully achieves the controllable morphology synthesis and selective deposition of Au NPs on the substrate simultaneously, which provides a promising candidate for SERS substrates fabrication, and holds potential applications in optoelectronics, such as molecular detection and biosensors.

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“…However, the low processability of PPV, owing its insolubility, hinders the fabrication of microcircuits with different geometries. Direct laser writing techniques, however, have enabled this issue to be overcome, since they allow 2D patterns to be designed, as demonstrated by the femtosecond laser micromachining of the PPV precursor . In that study, laser irradiation parameters were optimized to obtain the conversion of a precursor polymer, poly(xylene tetrahydrothiophenium chloride) (PTHT), into PPV, resulting in spatially localized regions of PPV surround by its precursor.…”

Section: Introductionmentioning

confidence: 99%

Micropatterning of poly(p‐phenylene vinylene) by femtosecond laser induced forward transfer

Almeida

Avila

Andrade

et al. 2018

Polymer International

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Conjugated polymers are important materials for optical applications, among which poly(p‐phenylene vinylene) (PPV) has a major role due to its applicability in sensors, organic light‐emitting diodes and large area displays. Despite advances on the synthesis of PPV‐based polymers and the improvements of their properties, its printing process, in particular involving the solid phase, remains unsuitable for the development of electro‐optical microcircuits. This paper demonstrates the printing of PPV from the solid phase in 2D micropatterns. Such an achievement was performed using laser induced forward transfer with femtosecond pulses, which allows area‐selective deposition within reduced scales as thin as ca 100 nm and 5 µm wide. Raman, fluorescence and electrochemical impedance spectroscopies confirm that the printed PPV micropatterns have the same structure, emission spectrum and conductivity as the target material, revealing the conservation of their original properties even after laser irradiation. The printing process was carried out using PPV films, overcoming the insolubility issue of this material. The optical and electrical characterization of the transferred PPV demonstrates the potential of this method for the patterning of electro‐optical microdevices, since luminescence and electrical conductivity were preserved. © 2018 Society of Chemical Industry

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Femtosecond-laser direct writing for spatially localized synthesis of PPV

Cited by 3 publications

References 50 publications

Direct laser writing of poly(phenylene vinylene) on poly(barrelene)

Direct laser writing of poly(phenylene vinylene) on poly(barrelene)

Shaped femtosecond laser induced photoreduction for highly controllable Au nanoparticles based on localized field enhancement and their SERS applications

Micropatterning of poly(p‐phenylene vinylene) by femtosecond laser induced forward transfer

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