• 제목/요약/키워드: LB법

검색결과 8건 처리시간 0.027초

은도 변화에 대한 지방산 LB막의 전기적 특성 (Electric Characteristics of Fatty Acid LB Films for Change of Temperature)

  • 이준호;김도균;최용성;장정수;권영수
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1998년도 추계학술대회 논문집
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    • pp.167-170
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    • 1998
  • The electrical characteristics of Stearic acid LB films were investigated to develop the gas sensor using Langmuir-Blodgett(LB) films. The deposition status of LB films were verified by the measurements of UV absorbance and I-V characteristics. The conductivity of Stearic acid LB films at room temperature was $10^{-8}[S/cm]$, which is typical of semiconductor. The conductivity was found to increase as the temperature was increased. The acitivation energy was about 1[eV].

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LB막을 누적한 수정진동자의 임피던스 특성 (The Impedance Properties of Quartz Crystal Microbalance Coated with LB films)

  • 진철남;김경환;유승엽;박재철;권영수
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1998년도 추계학술대회 논문집
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    • pp.171-174
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    • 1998
  • Quartz crystal in contact with viscoelastic medium is described directly in terms of the electrical equivalent circuit of the system. Stearic acid is used as viscoelastic medium and deposited on the surface of quartz crystal using the Langmuir-Blodgett(LB) method. Impedance properties of quartz crystal coated with LB films which were investigated and the possibility of applying the technique to chemical sensing introduced.

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페놀계 고분자의 LB막의 전기적 특성 (Electrical Properties in LB Films of Phenolic Polymer)

  • 김경환;신훈규;이범종;권영수
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1999년도 춘계학술대회 논문집
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    • pp.146-149
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    • 1999
  • Langmur-Blodgett (LB) method has a unique characteristic of making molecularly mutilayered aggregation structures. LB method makes the thickness of organic insulation layer controllable at molecular scale in various electronic devices. In this study, the organic materials applicable to crosslinked LB insulation layers of electronic devices have developed and the electrical properties of their LB films have examined such as Brewster angle microscopy(BAM), Scanning Maxwell-stress microscopy(SMM), and Current-voltage(1-V) properties.

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페놀계 고분자를 이용한 절연막의 제작과 MIM구조에서의 전기적 특성 (Fabrication of insulating fifes using phenolic polymer and electrical properties in MIM structure)

  • 김경환;유승엽;정상범;박재철;권영수
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1999년도 추계학술대회 논문집
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    • pp.347-349
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    • 1999
  • We have fabricated insulating thin films using p-hexadecoxyphenol(p-Hp) that was formed phenol-formaldehyde resin of crosslinked structure from reaction with formaldehyde by LB technique. For fabricated MIM device, the possibility for insulating layers of electronic were investigated by electrical properties of their LB films according to crosslinking of LB films current-voltage (I-V) properties and frequency-capacitance (C-F) characteristics. We have provided evidence for the high insulating performance of phenol-formaldehyde thin films by the LB method. Conductivity of their LB films was as follows: pure water > 1 % aq. Formaldehyde > heat treatment, in the current-voltage (I-V) characteristics. It is demonstrated that insulation properties of crosslinked p-HP LB films were improved. In capacitance-frequency properties, the heat-treated p-HP LB films for crosslinking showed a low relative dielectric constant.

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실리콘 웨이퍼 위에 제작된 DLPC 지질막의 전기적특성 (Elctrical Properties of DLPC Lipid Membrane Fabricated on the Silicon Wafer)

  • 이우선;김충원;이강현;정용호;김남오;김상용
    • 한국전기전자재료학회논문지
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    • 제11권12호
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    • pp.1115-1121
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    • 1998
  • MLS capacitor with lipid ultra thin films were deposited by Langmuir-Blodgett (LB) method on the silicon wafer. The current versus voltage and capacitance versus voltage relationships are depend on the applied voltage, electrode area and electrode materials. LB films deposited were made of L-$\alhpa$-DLPC, the 1 layer’s thickness of 35${\AA}$ was measured by ellipsometer. And MLS capacitor with different electrode materials, the work function of these materials was investigated to increase the leakage current. The result indicated the lower leakage current and very high saturation value of capacitance was reached within 700-800 pF when the two electrode was Ag. And $\varepsilon$1, $\varepsilon$2 versus photon energy showed good film formation.

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유기 박막의 전기적 특성 및 가스 반응 특성 (Gas Response and Electrical Properties of Organic Ultra-thin Films)

  • 박재철
    • 한국전기전자재료학회논문지
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    • 제11권10호
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    • pp.820-825
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    • 1998
  • We deposited stearic acid LB films by using Langmuir-Blodgett (LB)method and investigated anisotropy electrical conduction characteristics by I-V measurement for horizontal direction and vertical direction. Also, we measured gad response between deposited LB films and organic gas for various temperature(0~8$0^{\circ}C$) by 9MHz At-cut quartz crystal microbalance. The LB films have electrical conduction characteristics such as semiconducting and insulating properties. The is, the conductivity of LB films for the horizontal and vertical direction is about 10\ulcornerS/cm and 10\ulcorners/cm, respectively. the frequency shift of stearic acid LB films for the organic gases depended on the mass change by the surface adsorption and the inner penetration to the sensing films. The resonant frequency shift of the quartz crystal microbalance for temperature properties of LB films is thought to the effect of the rearrangement or the damage pf LB films above the melting point and the mobility increasement of the organic gas by the temperature rising.

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공진주파수와 저항을 이용한 지방산 LB막의 질량감지 특성 (Mass Sensing Properties of Fatty Acids System LB Films)

  • 진철남;김경환;강현욱;권영수;장정수
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1998년도 춘계학술대회 논문집
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    • pp.419-422
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    • 1998
  • There are lots of researches which are using quratz crystal in order to apply it to sensors, for example, mass detect sensor, humidity sensor, gas sensor, etc. We tried to apply quartz crystal to the sensor using the resonant frequency and the resistance properties. Four kinds of fatty acid which are having the same head group are coated at the surface of quartz crystal, the shift of the resonant frequency and the resistance are observed according to length of the tail group. Myristic acid$(C_{14})$, palmitic acid$(C_16)$, stearic acid$(C_{18})$, and arachidic acid$(C_{20})$ were coated by Langmuir-Blodgett(LB) technique. As results, the resonant frequency shift was observed linearly. However, there are some difference compared with Sauerbrey's equation. It can be explained by the effect of the temperature property and/or humidity. On the other hand, the shift of the resistance was observed nonlinearly.

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스테아르산과 인지질 혼합물의 농도변화에 대한 유기초박막의 안정성에 관한 연구 (A Study on the Stability of Ultra-Thin Film Mixed with Stearic Acid and Phospholipid)

  • 박근호
    • 한국응용과학기술학회지
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    • 제32권4호
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    • pp.789-794
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    • 2015
  • 스테아르산과 인지질혼합물의 농도변화에 띠르는 유기초박막에 대한 안정성을 조사하였다. 스테아르산과 인지질 혼합물 유기초박막은 ITO glass에 LB법을 사용하여 제막하였다. 전기화학적 특성은 $NaClO_4$ 용액에서 3 전극 시스템으로 순환전압전류법을 사용하여 초기 1650 mV에서 최종 퍼텐셜 -1350 mV 까지 측정하였다. 그 결과 스테아르산과 인지질의 혼합물 유기초막은 순환전압전류도표로부터 산화전류로 인한 비가역공정으로 나타났다. 스테아르산과 인지질혼합물 LB막(몰비 1:1, 1:2, 1:3)에서 확산계수(D)는 $0.01N\;NaClO_4$에서 각각 $1.4{\times}10^{-3}$, $1.7{\times}10^{-3}$$1.6{\times}10^{-3}(cm^2/s)$로 산출되었다.