한국레이저가공학회지 (Laser Solutions)

한국레이저가공학회 (Korean Society of Laser Processing)
권호 표지

환원된 산화 그래핀을 이용한 레이저 유도초음파의 64배 압력 상승 및 40dB 세기 상승

Laser induced ultrasound generation via reduced graphene oxide coated aluminum transmitter

  • 이석환 (서울대학교 기계항공공학부) ;
  • 박미애 (서울대학교 기계항공공학부) ;
  • 여재익 (서울대학교 기계항공공학부)
  • Lee, Seok Hwan (School of Mechanical & Aerospace Engineering, Seoul National University) ;
  • Park, Mi-Ae (School of Mechanical & Aerospace Engineering, Seoul National University) ;
  • Yoh, Jai-Ick (School of Mechanical & Aerospace Engineering, Seoul National University)
  • 투고 : 2012.12.11
  • 심사 : 2012.12.21
  • 발행 : 2012.12.31
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초록

We demonstrate that reduced graphene oxide (rGO) coated thin aluminum film is an effective optoacoustic transmitter for generating high pressure and high frequency ultrasound previously unattainable by other techniques. The rGO layer of different thickness is deposited between a 100 nm-thick aluminum film and a glass substrate. Under a pulsed laser excitation, the transmitter generates enhanced optoacoustic pressure of 64 times the aluminum-alone transmitter. A promising optoacoustic wave generation is possible by optimizing thermoelasticity of metal film and thermal conductivity of rGO in the proposed transmitter for laser-induced ultrasound (LIUS) applications.

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