• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2001.05a
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• pp.11-14
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• 2001

We give pressure stimulation into organic thin films and then manufacture a device under the accumulation condition that the state surface pressure is 30[mN/m]. LB layers of Arac. acid deposited by LB method were deposited onto slide glass as Y-type film. The physicochemical properties of the LB films were examined by UV absorption spectrum, SEM and AFM. The structure of manufactured device is Au/arachidic acid/Al. the number of accumulated layers are 3~9. Also. we then examined of the MIM device by means of I-V. The I-V characteristic of the device is measured from -3 to +3[V]. The insulation property of a thin film is better as the distance between electrodes is larger.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1995.05a
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• pp.111-114
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• 1995

This paper describes the imidization of PAAS(polyamic acid alkylamine salts) Langmuir-Blodgett (LB) films and the electrical properties of PAAS and polyimide(PI) LB films, The imidization conditons were investigated by TGA(Thermal Gravi-tational Analysis). FT-IR and UV/ visible absorption spectra. A thermal imidiczation was peformed at 300$^{\circ}C$ for 1 hour. The electrical properties of the PAAS and polymide LB films were measured by current-voltate(L-V) characteristics It shows that the electrical condcutivity of PL LB films is about 10 $\^$-15/S/cm which is two orders of magnetiude lower than that of the PAAS LB films A Schottky effect was also observed in both films.

• Proceedings of the KIEE Conference
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• 1990.11a
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• pp.121-124
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• 1990

In this paper, we study the electrical conduction mechanism in Langmuir-Blodgett(LB) ultra thin films. The LB device was a metal/LB films/metal sandwich structure, where metal is electrode. In our experiments, the temperature depend on the current at above $0^{\circ}C$. This phenomena show that the electrical conduction current is a schottky current inherent to LB ultra thin films.

• Proceedings of the KIEE Conference
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• 1991.07a
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• pp.241-243
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• 1991

The LB technique is one of the most, powerful fabricating methods of organic ultra thin film, which deposits a monolayer film in molecular level onto the surface of the substrate. In order to fabricate the LB film with optimal condition, we have to deposite monolayer film at optimum depositing pressure. which is dependent on the kind of deposit materials. ${\pi}-A$ curve is one of the most important, criteria to determine the optimum pressure. In this paper, we obtained that the optimum pressure is $20{\sim}50(mN/m)$ from ${\pi}-A$ curve of the stearic acid. In our experiments, it was known that LB ultra thin film is deposited beat at 30(mN/m) by checking the characteristics of LB film.

• Journal of the Korean Applied Science and Technology
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• v.17 no.3
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• pp.178-182
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• 2000

We have investgated UV-Vis absorbance to observe the photoisomerization using the mixture solutions in chloroform and LB monolayers mixed with DLPE and 8A5H containing azobenzene which showed reversible cis-trans photoisomerization irradiated by alternate lights. We have found that the absorbance spectrums of the mixture solutions and LB monolayers were reversibly induced to cis-trans photoisomerization irradiated by alternate lights. In addition, the absorbance of both solution and LB monolayer mixed with 8A5H and DLPE were reversibly by alternate temperatures. As a results, the 1:1(by volume) mixture ratio of 8A5H and DLPE was more flexible and reversible cis-trans photoisomerization than the others.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1998.11a
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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].

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1993.11a
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• pp.109-111
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• 1993

We reported the fabrication and thermal cross-linking of the LB files on porous substrates. The monolayers of the polymers which polyion-conplexed with PAA at the air-water interface can be transferred onto solid substrates such as porous fluorocarbon membrane filter and quartz crystal microbalance. The properties of the monolayers and the LB films investigated by $\pi$-A isothem, FT-IR, and SEM will be discussed. In addition, it was attempted to investigate the reaction of polymer LB films in the organic gas surrounding by the use of LB technique.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1995.11a
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• pp.277-280
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• 1995

We had experiment using LB method that can fabricate molecular order ultra-thin film below 100${\AA}$. LB mettled has known as main technology of information society in 21C, because it is nut only free oriention and alignment of molecular but also ability of thickness control as molecular order. In this paper, the fabricated condition and physical properities of functional ultra-thin film of molecular order was investigated and highly efficient ultra-thin film capacitor was fabricated by using ultra-thin LB film for application as electronic device. Possibility of ultra-thin film capacitor was researched by analizing rind measuring electrical properties. Polyimide ultra-thin LB film capacitor was fabricated, ensured theoretically rind experimentally its possibility in range of 10Hz∼ 1MHz through its frequency characteristics.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1997.04a
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• pp.202-205
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• 1997

In this paper, we synthesized poly(N-(2-4-imidazolyl) ethyl) maleimide-alt-1-octadecene(IMI-O) polymer that can have function group and improvement of mechnical strength and then confirmed the possibility of molecular device made by LB method. Evaluation of LB film have been processed such as the technique of EA, $^{1}$H-NMR, FT-IR. Also, the deposition status was observed by SEM and Metal/Insulator/Metal(MIM) device was fabricated for investigation of electric properties. In our experimental results. The surface pressure for the solid state was investigated to 20~35[dyne/cm] by the $\pi$ -A isotherm and the limiting area was about 40 ~45 ($\AA$$^2$/molecule). The deposition status of LB films was confirmed by SEM. The conductivity of LB film was found to be 10$^{-14}$ ~10$^{-13}$ [S/cm] by I-V characteristic.

• Tribology and Lubricants
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• v.19 no.6
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• pp.329-334
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• 2003

The antiwear properties of amphiphilic monolayers and composite multilayer on silicon surface were investigated using micro­tribometer and Auger Electron Spectroscopy. Langmuir­Blodgett (LB) monolayers from behenic acid, 2,4­heneicosanedione(HD) and its lopper complex((HD)$_2$Cu) were fabricated on silicon surface and the composite multilayer of 5­bilayer of (HD)$_2$Cu was fabricated on the surface of octadecyltrichlorosilane (OTS) self­assembled monolayer (SAM). We observed that LB monolayers and the composite multilayer exhibited a steady and excellent friction response when compared with the OTS SAM. These LB mono and multilayer also showed much higher wear­resistance than the OTS SAM.