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Title: Fs-laser processing of polydimethylsiloxane

Abstract

We present an experimental analysis on surface structuring of polydimethylsiloxane films with UV (263 nm) femtosecond laser pulses, in air. Laser processed areas are analyzed by optical microscopy, SEM, and μ-Raman spectroscopy. The laser-treated sample shows the formation of a randomly nanostructured surface morphology. μ-Raman spectra, carried out at both 514 and 785 nm excitation wavelengths, prior and after laser treatment allow evidencing the changes in the sample structure. The influence of the laser fluence on the surface morphology is studied. Finally, successful electro-less metallization of the laser-processed sample is achieved, even after several months from the laser-treatment contrary to previous observation with nanosecond pulses. Our findings address the effectiveness of fs-laser treatment and chemical metallization of polydimethylsiloxane films with perspective technological interest in micro-fabrication devices for MEMS and nano-electromechanical systems.

Authors:
;  [1]; ; ; ;  [2]; ; ;  [3]; ;  [4]
  1. Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Shose, Sofia 1784 (Bulgaria)
  2. Rostislaw Kaischew Institute of Physical Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Block 11, Sofia 1113 (Bulgaria)
  3. CNR-SPIN, Dipartimento di Scienze Fisiche, Universita degli Studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli (Italy)
  4. Photophysics Department, The Szewalski Institute, Polish Academy of Sciences, 14 Fiszera St, 80-231 Gdańsk (Poland)
Publication Date:
OSTI Identifier:
22308707
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; EXCITATION; FILMS; LASER RADIATION; MEMS; NANOSTRUCTURES; OPTICAL MICROSCOPY; RAMAN SPECTRA; RAMAN SPECTROSCOPY; RANDOMNESS; SCANNING ELECTRON MICROSCOPY; SURFACES; WAVELENGTHS

Citation Formats

Atanasov, Petar A., E-mail: paatanas@ie.bas.bg, Nedyalkov, Nikolay N., Valova, Eugenia I., Georgieva, Zhenya S., Armyanov, Stefan A., Kolev, Konstantin N., Amoruso, Salvatore, Wang, Xuan, Bruzzese, Ricardo, Sawczak, Miroslaw, and Śliwiński, Gerard. Fs-laser processing of polydimethylsiloxane. United States: N. p., 2014. Web. doi:10.1063/1.4887812.
Atanasov, Petar A., E-mail: paatanas@ie.bas.bg, Nedyalkov, Nikolay N., Valova, Eugenia I., Georgieva, Zhenya S., Armyanov, Stefan A., Kolev, Konstantin N., Amoruso, Salvatore, Wang, Xuan, Bruzzese, Ricardo, Sawczak, Miroslaw, & Śliwiński, Gerard. Fs-laser processing of polydimethylsiloxane. United States. doi:10.1063/1.4887812.
Atanasov, Petar A., E-mail: paatanas@ie.bas.bg, Nedyalkov, Nikolay N., Valova, Eugenia I., Georgieva, Zhenya S., Armyanov, Stefan A., Kolev, Konstantin N., Amoruso, Salvatore, Wang, Xuan, Bruzzese, Ricardo, Sawczak, Miroslaw, and Śliwiński, Gerard. 2014. "Fs-laser processing of polydimethylsiloxane". United States. doi:10.1063/1.4887812.
@article{osti_22308707,
title = {Fs-laser processing of polydimethylsiloxane},
author = {Atanasov, Petar A., E-mail: paatanas@ie.bas.bg and Nedyalkov, Nikolay N. and Valova, Eugenia I. and Georgieva, Zhenya S. and Armyanov, Stefan A. and Kolev, Konstantin N. and Amoruso, Salvatore and Wang, Xuan and Bruzzese, Ricardo and Sawczak, Miroslaw and Śliwiński, Gerard},
abstractNote = {We present an experimental analysis on surface structuring of polydimethylsiloxane films with UV (263 nm) femtosecond laser pulses, in air. Laser processed areas are analyzed by optical microscopy, SEM, and μ-Raman spectroscopy. The laser-treated sample shows the formation of a randomly nanostructured surface morphology. μ-Raman spectra, carried out at both 514 and 785 nm excitation wavelengths, prior and after laser treatment allow evidencing the changes in the sample structure. The influence of the laser fluence on the surface morphology is studied. Finally, successful electro-less metallization of the laser-processed sample is achieved, even after several months from the laser-treatment contrary to previous observation with nanosecond pulses. Our findings address the effectiveness of fs-laser treatment and chemical metallization of polydimethylsiloxane films with perspective technological interest in micro-fabrication devices for MEMS and nano-electromechanical systems.},
doi = {10.1063/1.4887812},
journal = {Journal of Applied Physics},
number = 2,
volume = 116,
place = {United States},
year = 2014,
month = 7
}
  • The photoacoustic effect has been broadly applied to generate high frequency and broadband acoustic waves using lasers. However, the efficient conversion from laser energy to acoustic power is required to generate acoustic waves with high intensity acoustic pressure (>10 MPa). In this study, we demonstrated laser generated high intensity acoustic waves using carbon nanofibers–polydimethylsiloxane (CNFs-PDMS) thin films. The average diameter of the CNFs is 132.7 ± 11.2 nm. The thickness of the CNFs film and the CNFs-PDMS composite film is 24.4 ± 1.43 μm and 57.9 ± 2.80 μm, respectively. The maximum acoustic pressure is 12.15 ± 1.35 MPa using a 4.2 mJ, 532 nm Nd:YAG pulsed laser. The maximum acoustic pressure using the CNFs-PDMSmore » composite was found to be 7.6-fold (17.62 dB) higher than using carbon black PDMS films. Furthermore, the calculated optoacoustic energy conversion efficiency K of the prepared CNFs-PDMS composite thin films is 15.6 × 10{sup −3 }Pa/(W/m{sup 2}), which is significantly higher than carbon black-PDMS thin films and other reported carbon nanomaterials, carbon nanostructures, and metal thin films. The demonstrated laser generated high intensity ultrasound source can be useful in ultrasound imaging and therapy.« less
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