Issue 5, 2020
From the journal:

Nanoscale Advances

Synthesis of silicon carbide nanocrystals and multilayer graphitic carbon by femtosecond laser irradiation of polydimethylsiloxane

Shuichiro Hayashi, ORCID logo a   Fumiya Morosawab  and  Mitsuhiro Terakawa ORCID logo *ab  

* Corresponding authors

a School of Integrated Design Engineering, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama-shi, Japan
E-mail: terakawa@elec.keio.ac.jp

b Department of Electronics and Electrical Engineering, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama-shi, Japan

Abstract

Laser-based modification of polymer materials has been emerging as a versatile and efficient technique to simultaneously form and pattern electrically conductive materials. Recently, it has been revealed that native polydimethylsiloxane (PDMS) can be modified into electrically conductive structures using femtosecond laser irradiation; however, the details regarding the structures formed by this method have yet to be revealed. In this work, structures were fabricated by focusing and scanning femtosecond laser pulses onto the surface of PDMS. Raman Spectroscopy and Transmission Electron Microscopy (TEM) analyses revealed the formation of silicon carbide (SiC) nanocrystals, as well as multilayer graphitic carbon, in the modified regions of PDMS. The state of the formed material differed depending on the distance from the focal spot, suggesting that photo-thermal effects contributed to the degradation of PDMS into conductive material. Electrical conductivity measurements, in addition to Raman results, indicated that the amount of disorder in the formed graphitic carbon contributes to the electrical conductivity of the fabricated structures.

Graphical abstract: Synthesis of silicon carbide nanocrystals and multilayer graphitic carbon by femtosecond laser irradiation of polydimethylsiloxane

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Article information

DOI
https://doi.org/10.1039/D0NA00133C
Article type
Paper
Submitted
18 Feb 2020
Accepted
16 Mar 2020
First published
19 Mar 2020
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2020,2, 1886-1893

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Synthesis of silicon carbide nanocrystals and multilayer graphitic carbon by femtosecond laser irradiation of polydimethylsiloxane

S. Hayashi, F. Morosawa and M. Terakawa, Nanoscale Adv., 2020, 2, 1886 DOI: 10.1039/D0NA00133C

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