통합 검색 | Korea Science

이원진
- 한국안광학회지
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- 제6권1호
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- pp.87-91
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- 2001
PECVD 방법으로 60 Hz 상용전원을 사용하여 발생한 아세틸렌 플라스마로부터 다이아몬드성 탄소박막을 제작하고 Raman 분광에 의하여 D($sp^3$)와 G($sp^2$) 피크를 관측하여 박막의 다이아몬드성 정도를 확인하였고 $sp^3$와 $sp^2$의 비율과 FTIR 결과로부터 박막내의 수소함량의 측정을 통하여 아세틸렌 분압비와의 연관성을 확인하였다.
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황현진;송시몬
- 대한기계학회:학술대회논문집
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- 대한기계학회 2008년도 추계학술대회B
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- pp.2415-2418
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- 2008
Polydiacetylenes (PDAs) are very attractive chemical substances which have distinctive features of color change and fluorescence emission by thermal or chemical stress. Especially, when PDAs contact with solutions of a particular pH, such as a strong alkaline sodium hydroxide (NaOH) solution or a strong acidic hydrogen chloride (HCl) solution, PDAs change their color from non-fluorescent blue to fluorescent red. In this study, we propose a novel method to detect alkaline pH using PDAs and NaOH solutions by hydrodynamic focusing on a microfluidic chip. Preliminary results indicate that the fluorescent intensity of PDAs increases in respond to the NaOH solution concentrations. Also, the fluorescence is quenched back when the PDAs are in contact with a HCl solution. These results are useful in a microfluidic PDA sensor chip design for pH detection.
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