• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2006년 제4회 한국유체공학학술대회 논문집
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• pp.297-300
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• 2006

This article discusses about the droplet movement on the super-hydrophobic surface by the electro-wetting on dielectric and the effect of particles on the contact angle as well as the movement is investigated. The movement of droplet, driven by the principle of electro-wetting on dielectric, and the effect of particles are experimentally verified according to the driving voltage and different particles concentrations (fluorescent, charged particles). To increase the contact angle, the super-hydrophobic surface is fabricated and applied to the dielectric layer for the EWOD device. Then its performance is verified and discussed.

• 한국전기전자재료학회논문지
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• 제20권2호
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• pp.173-177
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• 2007

Electro-wetting display (EWD) that displays information by controling movement of fluid is one of the strong candidates for electronic paper display (EPD). In EWD cell. the movement of oil which locates between hydrophobic insulation layer and deionized water is rather random, which makes it difficult to realize gray scale, fast response time, and good color characteristics. In this paper, we investigated how to control the oil movement in specific one direction by surface treatment and pattered electrodes. From these experiments, we could control oil movement in a desired direction.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2007년도 춘계학술발표대회 및 제12회 신소재 심포지엄
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• pp.23.2-23.2
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• 2007

• 한국광학회지
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• 제17권4호
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• pp.347-353
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• 2006

전자습윤현상에 기초한 응용 기술들은 액체렌즈로 대표되는 광학분야에서부터, 바이오 칩 등의 생체분야까지 다양하지만, 아직 동적 특성에 대한 이해가 부족하고, 수 미리 초에 발생하는 현상을 측정하는 방법도 매우 제한적이다. 전기 습윤의 동적인 현상을 측정, 평가 하기 위해서는 전압 인가 후 빠르게 움직이는 계면의 동적 현상이 계면의 정보를 표현할 수 있는 수치로 표현되어야 하며, 연속적인 측정이 가능해야 한다. 본 연구에서는 전자습윤 현상에 의한 액체 계면의 동적인 변화를 광량변화를 통해 실 시간적으로 측정할 수 있는 방법을 제시하였고, 실험을 통하여 제시된 방법의 정확도를 검증하였다. 제시된 광량변화 측정 방법은 장치가 단순하여 기존의 방법에 비해 고가의 장비 및 추가의 데이터 분석 기술이 필요치 않으면서도 연속적인 실시간 데이터를 얻을 수 있다.

• 한국유변학회:학술대회논문집
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• 한국유변학회 2006년도 춘계 학술발표회 논문집
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• pp.5-5
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• 2006

• 한국유체기계학회 논문집
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• 제18권6호
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• pp.27-30
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• 2015

In this study, we attempted to harvest energy using water droplet based on Reverse Electro Wetting On Dielectric (REWOD) phenomenon between water droplet and dielectric surface without external bias. REWOD device can be fabricated via simple coating process, which is highly economic and easy. We believe that our system is well-suited for IoT(Internet of Things) embedded electronics that require low but consistent electricity. Moreover, our device can be integrated with window to generate electricity upon raindrops.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2011년도 춘계학술대회 및 Fine pattern PCB 표면 처리 기술 워크샵
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• pp.184-185
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• 2011

In this study, in order to obtain a high reflectivity for the LED lead frame, tin dip coating and tin plating were conducted respectively, and wettability of LED lead frame with tin solder also was tested by wetting balance tester. A Cu sheet was plated in Cu brighten electroplating bath and followed by immersion in a Sn electro-less plating bath [1]. On the other hand, in the dip coating process, a Cu sheet was dipped into molten tin. In the progress of wetting test, besides wetting balance curve, the maximum measured force($F_m$), the maximum withdrawal force($F_w$) and zero-cross time($t_0$) were obtained in various temperatures. With the maximum withdrawal force, the surface tension was calculated at different temperatures. The Cu sheet plated with bright Cu and Sn show a silver bright property while that of Cu dipped with Sn possessed a high reflectance density of 1.34GAM at $270^{\circ}C$.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2007년도 춘계학술발표대회 및 제12회 신소재 심포지엄
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• pp.27.1-27.1
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• 2007

• 대한한방소아과학회지
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• 제19권1호
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• pp.103-115
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• 2005

Objectives : Nocturnal enuresis is common disorder in children and has important negative effects on the self-image and performance of children. Thus Successful treatment needed to increase self-esteem. Many studies of this symptoms were reported. But electro-acupuncture treatment not reported in Korea. Methods : We treated three cases enuretic children with different types. Their diagnosis were non-monosymptomatic primary, monosymptomatic primary, monosymptomatic secondary nocturnal enuresis. We used electro-acupuncture on Zhongji(CV3), Guanyuan(CV4) for 20 min. To investigate relapse. at least for 4 months after the end of the therapy we followed-up by telephone. Results : After treatment, diurnal urinary symptoms, such as increased frequency of urination, urgency, incontinence were dramatically improved. And the number of wet night decreased with nocturia and delayed wetting time. Compared to pre-treatment, findings, the number of wet nights decreased 80% or more. Conclusion : All of them tolerated electro-acupuncture well and kept reduction at least for 4 months follow-up. Further study is needed with more cases.

• Journal of Information Display
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• 제7권2호
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• pp.12-15
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• 2006

We propose a patterning method of liquid crystal (LC) alignment layer for producing multi-domain LC structures. By controlling thermal conditions during micro-contact printing procedures and facilitating wetting properties of patterning materials, patterned LC orientation can be easily obtained on a bare ITO surface or other polymer films. The newly proposed patterning method is expected to be a very useful tool for fabricating multi-domain LC structures to enhance or design electro-optic properties of LC-based devices.