Earticle

초록

영어

This paper presents a simulation and fabrication of a PMMA (Poly (methyl methacrylate)) micro-suction tool for a capsular endoscope using a solid chemical propellant, AIBN (azobisisobutyronitrile). A capsular endoscope integrated with a micro-suction tool can gather gastro-intestinal juice for medical diagnosis. Our previous PDMS (polydimethylsiloxane) micro-suction tool has a fabrication problem: the PDMS Venturi-tube body and the glass substrate become detached during suction operation. In this study, PMMA is used as a material for enhancing the bonding strength. Additionally, PMMA has a lower contact angle than does PDMS, which results in an improved suction efficiency. The proposed PMMA micro-suction tool consists of an AIBN chamber, a micro-heater, a Venturi-tube, and a liquid reservoir. The PMMA Venturi-tube body is fabricated using X-ray lithography. The suction mechanism is as follows: The AIBN is decomposed into by-product and inert nitrogen gas by the heat generated by the micro-heater. The generated nitrogen gas is accelerated through the vena contracta section of the Venturi-tube. The accelerated nitrogen gas induces a negative pressure, so that the negative pressure pumps the target gastro-intestinal juice. The bonding strength of the PMMA and PDMS micro-suction tool are measured to be 1.6 N/m and 0.3 N/m, respectively. The PMMA micro-suction tool starts to pump the diluted ink when the generated negative pressure is 0.11 kPa. This value is approximately three times lower than the pressure of the PDMS micro-suction tool. The capsular endoscope integrated with the PMMA micro-suction tool is expected to improve the diagnosis achievable with the intended pathological research.

목차

Abstract
 1. Introduction
 2. Material and Design
  2.1. Ignition source (AIBN)
  2.2. Micro-heater design
  2.3. Venturi-tube design
  2.4. Simulation model of Venturi-tube design
 3. Fabrication
  3.1. Fabrication process of PMMA Venturi-tube body
  3.2. Fabrication process of the PMMA micro-suction tool 
 4. Experiment
  4.1. Measurement of bonding strength
  4.2. Measurement of minimum negative pressure for suction
 5. Conclusion
 References

키워드

저자

• Ho-soo Park [ Automation and Systems Research Institute / Inter-university Semiconductor Research Center / Engineering Research Institute, Seoul National University, School of Electrical Engineering and Computer Sciences, Seoul National University ]
• Kyo-in Koo [ Automation and Systems Research Institute / Inter-university Semiconductor Research Center / Engineering Research Institute, Seoul National University, School of Electrical Engineering and Computer Sciences, Seoul National University ]
• Sangmin Lee [ Automation and Systems Research Institute / Inter-university Semiconductor Research Center / Engineering Research Institute, Seoul National University, School of Electrical Engineering and Computer Sciences, Seoul National University ]
• Seok-jun Hong [ Automation and Systems Research Institute / Inter-university Semiconductor Research Center / Engineering Research Institute, Seoul National University, School of Electrical Engineering and Computer Sciences, Seoul National University ]
• Hyungjung Yoo [ Automation and Systems Research Institute / Inter-university Semiconductor Research Center / Engineering Research Institute, Seoul National University, School of Electrical Engineering and Computer Sciences, Seoul National University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Bio-Science and Bio-Technology

• 간기

  격월간

• pISSN

  2233-7849

• 수록기간

  2009~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605