• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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• pp.175-178
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• 1988

A film is fabricated by depositing several sliced organic ultra thin films on a slide glass. Both UV-absorbance and the capacitance of a multi - layered organic ultra thin film with (N-docosyl pyridinium)-TCNQ(1:2) complex have a desired value on the condition of well alignment in depositing several layers. Forethermore the conductivity of this film measured by the direction of either horizontal or vertical axis. respectively, is results in a quite different value.

• 한국응용과학기술학회지
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• 제12권1호
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• pp.125-131
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• 1995

Ultra thin films of Tetra-3-hexadecylsulphamoylcopperphthalocyanine(HDSM-CuPc) were formed on various substrates by Langmuir-Blodgett method, where HDSM-CuPc was synthesized by attaching long-chain alkylamine(hexa-decylamine) to CuPc. The reaction product was identified with FT-IR, UV-visible absorption spectroscopies, elemental analysis and thin layer chromatography. The formation of Ultrathin Langmuir-Blodgett(LB) films of HDSM-CuPc was confirmed by FT-IR and UV-visible spectroscopies. A quartz piezoelectric crystal coated with LB films of HDSM-CuPc was examined as a gas sensor for $N0_2$ gas. HDSM-CuPc LB films were transferred to a quartz crystal microbalance(QCM) in the form of Z-type multilayers. Response characteristics of film-coated QCM to $NO_2$ gas concentrations over a range of $100{\sim}600ppm$ have been tested with a thickness of $5{\sim}20$ layers of HDSM-CuPc. Changes in frequency by adsorption of $NO_2$ were increased With the number of LB layers and $NO_2$ concentration, but the response time was slow.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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• pp.394-395
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• 2006

본 연구에서는 Arachidic acid Langmuir-Blodgett (LB) 막의 표면이미지와 전압-전류 특성을 측정하였다. Arachidic acid는 포화지방산으로 ($CH3(CH_2)_{18}$ COOH)의 구조를 가지며, 크기가 $27.5\;{\AA}$으로 $CH_3(CH_2)_{18}$의 소수기와 COOH의 친수기로 구성되어 있어, LB Trough를 사용하여 박막제작과 분자제어가 쉽다. Chloroform을 용매로 하여 2mmol/l의 농도를 조성하여 ${\pi}$-A 등온선을 통해 기체 상태, 액체 상태, 고체 상태를 관찰하였다. LB막의 제작 및 평가에서 막의 안정성은 ${\pi}$-A곡선, AFM (Atomic force microscopy) 등을 통하여 확인 하였다. 또한 LB 막을 Metal/LB막/Metal 구조의 소자로 제작하여 전압-전류 특성을 측정하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.943-946
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• 2004

We have investigated to observe the photoisomerization using the mixture solutions in chloroform and LB monolayers mixed with DPPA and BASH containing azobenzene group which has reversible to cis-trans by light irradiation.. Spreading solutions for the LB films were Prepared in chloroform($5.0{\times}10^{-5}mol/L$). We investigated the photoisomerization and property of the organic ultra thin film of fatty acid containing azobenzene was Prepared on the glass plate by LB method. As a result, the absorption spectra of 8A5H and DPPA mixture of LB films was induced to photoisomerization by alternating irradiation of ultraviolet and visible light, because the condensation of pure azobenzene monolayers was loosened by the introduction of phospholipid into the monolayers, and the molecular high aggregation in pure azobenzene monolayers is also weakened by the introduction of phospholipid. We found that it was reversibly induced to cis-trans photoisomerization in a various mixture molar ratio.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1992년도 추계학술대회 논문집
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• pp.63-66
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• 1992

Using an aromatic system, we made a ultra thin insulator through LB-method. We measured and wrote down afternating currant characteristics of ultraviolet rays extincting-spectrum and I.R extincting-spectrum. We surveyed the thickness of a film through X-ray diffracting method and certified about $4{\AA}$ by the layer. Measuring the characteristics of direct current voltage and electric current with this sample, we produced its conductivity and discovered that this sample had a god insulating performance. Addition to this, we measured the characteristics of voltage and electric current, and the temperature dependency of conductivity in a high voltage system and with these results tried to interpret a mechanism of conduction.

• 한국응용과학기술학회지
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• 제11권2호
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• pp.89-92
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• 1994

Ultra thin organic films, (3-docosyl benzimidazolium)-TCNQ(1:1)complex, were deposited onto ordinary microscope slide glass substrates with a Langmuir-Blodgett technique. II-A isotherms were studied to find optimum conditions of deposition by varying temperature. Anisotropic de electrical conductivities were measured at room temperature. They are about $5.21{\times}10^{-12}S/cm$ along the direction of film surface, and $(2.73{\sim}4.40){\times}10^{-16}S/cm$ in the vertical direction.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 C
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• pp.1539-1541
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• 2002

When did Metal (Au, Al) electrode differently, it is spread already that it is by energy level of electrode difference of electrical conductivity. This paper, experiment manufactures device of Metal/Organic Films/Metal structure using PBDG and I-V properties by electrode analyzed comparison. Also, measure energy level by electrode by propertiesy electrochemistry and studied about electron transfer of organic thin film in LUMO level relation with HOMO level.

• 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 $1.4{\times}10^{-3}$, $1.7{\times}10^{-3}$ 및 $1.6{\times}10^{-3}(cm^2/s)$로 산출되었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 C
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• pp.1716-1718
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• 1996

It is well known that the metallophthalocyanine (MPcs) are sensitive to toxic gaseous molecules such as $NO_2$ and also chemically and thermally stable. Therefore, lots of MPcs are studied for the potential chemical sensor for $NO_2$ gas using quartz crystal microbalance(QCM) or electrical conductivity. In this study, thin films of octa(2-ethylhexyloxy) copper-phthalocyanine were prepared by Langmuir-Blodgett method and characterized by using UV-VIS spectrascopy and ellipsometry. Transfer condition, film characterization, and preliminary results of current-voltage(I-V) characteristics of these films exposed to $NO_2$ gas as a function of film thickness will be discussed.

• 한국응용과학기술학회지
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• 제14권1호
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• pp.89-93
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• 1997

In this research, ultra-thin films of organic charge transfer complex were deposited on to ordinary microscope slide-glass subtrates with a Langmuir-Blodgett technique. ${\pi}$-A isotherm characteristics of these complex were studied in order to find optimum conditions of deposition by varying temperature of subphase, compression speed, and spreading amount. Transfer ratio of these films were studied during the process of deposition. The UV-visible absorbance spectra of LB films were measured to find state of deposition by varing layer number. The observed optimum conditions of surface, pressure, spreading amount, and dipping speed for depositing LB films(Y-type) were 38m/Nm, $150{\mu}l$ and 5mm/min, respectively. Since the tansfer ratio is close to 100%, the monolayer on the subphase seems to be well transferred to the solid substrate. The thickness of the film was well-controlled as the UV-vis absorbance of films were changed linear according to the number of layers.