Pub Date : 2001-10-01DOI: 10.1080/10587250108030106
Yong-Sung Choi, Do-Kyun Kim, Young-Soo Kwonb
Abstract In this paper, we describe a new approach for an arrangement of many kinds of DNAs on transducers to construct a DNA microarray. A high-density array of sensor probes was prepared by randomly distributing a mixture of particles immobilized with various DNAs. A process for immobilization of the DNAs was separated from the assembly of the particles. The particles were arranged on the chip pattern by random fluidic self-assembly, using hydrophobic interaction.
{"title":"New Technology for DNA Chips on a Microarray-Random Fluidic Self-assembly Method Using Hydrophobic Interaction","authors":"Yong-Sung Choi, Do-Kyun Kim, Young-Soo Kwonb","doi":"10.1080/10587250108030106","DOIUrl":"https://doi.org/10.1080/10587250108030106","url":null,"abstract":"Abstract In this paper, we describe a new approach for an arrangement of many kinds of DNAs on transducers to construct a DNA microarray. A high-density array of sensor probes was prepared by randomly distributing a mixture of particles immobilized with various DNAs. A process for immobilization of the DNAs was separated from the assembly of the particles. The particles were arranged on the chip pattern by random fluidic self-assembly, using hydrophobic interaction.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"293 ","pages":"363 - 366"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10587250108030106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72494757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-10-01DOI: 10.1080/10587250108030116
Ok-Byoung Kim, Yunseok Kim, Young Kwan Kim, Jung-soo Kim
Abstract Organic thin film transistors were fabricated using pentacene and organic gate insulator on the glass substrates. Polyimide and photo-acryl were used as a gate insulator respectively. We investigated transfer and output characteristics of the thin film transistors(TFT's) having active layer of pentacene. We calculated field effect mobility and on/off ratio from transfer characteristics of pentacene TFT's, and measured IR absorption spectrum of polyimide used as gate insulator.
{"title":"Pentacene Thin Film Transistor Using Organic Material as a Gate Insulator","authors":"Ok-Byoung Kim, Yunseok Kim, Young Kwan Kim, Jung-soo Kim","doi":"10.1080/10587250108030116","DOIUrl":"https://doi.org/10.1080/10587250108030116","url":null,"abstract":"Abstract Organic thin film transistors were fabricated using pentacene and organic gate insulator on the glass substrates. Polyimide and photo-acryl were used as a gate insulator respectively. We investigated transfer and output characteristics of the thin film transistors(TFT's) having active layer of pentacene. We calculated field effect mobility and on/off ratio from transfer characteristics of pentacene TFT's, and measured IR absorption spectrum of polyimide used as gate insulator.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"16 1","pages":"403 - 406"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72718647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-10-01DOI: 10.1080/10587250108024774
S. Oh, C. Lee, S. W. Kim
Abstract Amorphous molecular materials such as 1,3,5-tris(4-chlorophenyl phenylamino)benzene, p-ClTDAB and p-BrTDAB were synthesized and then organic electroluminescent (EL) devices using the amorphous compounds as hole transporting materials were fabricated. ITO/p-XTDAB (X˭C1 or Br)/Alq3/Al device emitted green light with the brightness of 1300 cd/m2. Especially, it has been found that the durability and EL performance were improved by p-XTDAB compared to TDAB.
{"title":"Durability and Characteristics of Organic EL Device using Amorphous Materials as Hole Transporting Materials","authors":"S. Oh, C. Lee, S. W. Kim","doi":"10.1080/10587250108024774","DOIUrl":"https://doi.org/10.1080/10587250108024774","url":null,"abstract":"Abstract Amorphous molecular materials such as 1,3,5-tris(4-chlorophenyl phenylamino)benzene, p-ClTDAB and p-BrTDAB were synthesized and then organic electroluminescent (EL) devices using the amorphous compounds as hole transporting materials were fabricated. ITO/p-XTDAB (X˭C1 or Br)/Alq3/Al device emitted green light with the brightness of 1300 cd/m2. Especially, it has been found that the durability and EL performance were improved by p-XTDAB compared to TDAB.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"2012 1","pages":"423 - 426"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73431046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-10-01DOI: 10.1080/10587250108030040
Kuniaki Tanaka, K. Maeda, H. Usui
Abstract SrOx thin films were prepared by the ionization-assisted deposition as the electron injection layer between the electron transport/emitting layer and the Al cathode of the organic light emitting diode. By inserting an SrOx layer of a few-nm thick, the luminance increased nearly three orders of magnitudes for the same driving voltage. The device performance was also controlled by the ion acceleration voltage that was applied in the course of SrOx film deposition. Compared to the simple evaporation, the ionization-assisted deposition improved the luminance and the power efficiency by more than two times. XPS analysis suggested that the ion acceleration leads to two dimensional homogeneous film growth at the initial stage of film deposition.
{"title":"Ionization-Assisted Deposition of SrOx Thin Films for Electron Injection Layer of Organic Light Emitting Diodes","authors":"Kuniaki Tanaka, K. Maeda, H. Usui","doi":"10.1080/10587250108030040","DOIUrl":"https://doi.org/10.1080/10587250108030040","url":null,"abstract":"Abstract SrOx thin films were prepared by the ionization-assisted deposition as the electron injection layer between the electron transport/emitting layer and the Al cathode of the organic light emitting diode. By inserting an SrOx layer of a few-nm thick, the luminance increased nearly three orders of magnitudes for the same driving voltage. The device performance was also controlled by the ion acceleration voltage that was applied in the course of SrOx film deposition. Compared to the simple evaporation, the ionization-assisted deposition improved the luminance and the power efficiency by more than two times. XPS analysis suggested that the ion acceleration leads to two dimensional homogeneous film growth at the initial stage of film deposition.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"16 1","pages":"65 - 68"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74486396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-10-01DOI: 10.1080/10587250108024694
Yongku Kang, Eunkyoung Kim, Changjin Lee
Abstract Electrochemically active multilayers of self doped polyaniline films were prepared by the ionic interaction between poly(aniline N-butanesulfonate) (PANBUS) and polyethylene imine. Kinetic constant and free energy of the PANBUS adsorption were calculated to be 2.3/M·sec and -5.4 kcal/mole, respectively from the analysis of QCM. The prepared film showed the characteristic cyclic voltammogram of polyaniline and EQCM study of the multilayered film indicated that the mass change during oxidation and reduction was independent on the cations and anions of the used electrolytes.
{"title":"Electrochemical Quartz Crystal Microbalance Study of the Self-assembled Multilayered Poly(aniline N-Butansulfonate) Film","authors":"Yongku Kang, Eunkyoung Kim, Changjin Lee","doi":"10.1080/10587250108024694","DOIUrl":"https://doi.org/10.1080/10587250108024694","url":null,"abstract":"Abstract Electrochemically active multilayers of self doped polyaniline films were prepared by the ionic interaction between poly(aniline N-butanesulfonate) (PANBUS) and polyethylene imine. Kinetic constant and free energy of the PANBUS adsorption were calculated to be 2.3/M·sec and -5.4 kcal/mole, respectively from the analysis of QCM. The prepared film showed the characteristic cyclic voltammogram of polyaniline and EQCM study of the multilayered film indicated that the mass change during oxidation and reduction was independent on the cations and anions of the used electrolytes.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"115 1","pages":"87 - 90"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83213852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-10-01DOI: 10.1080/10587250108024683
N. Kimura, Y. Nakamura, K. Imai, T. Sawada, I. Tsubono
Abstract Retinoid molecules are the important component for photoreaction. We observed absorption spectra of the solution of retinoic acid, soaked films, and LB films. The spectrum of the solution shows the peak at 368nm. The spectrum of the soaked film could be resolved into two peaks. The peak at 370nm would be due to the monomer molecules, and the peak at 418nm would be due to the aggregate. The absorption spectrum of the LB film of retinoic acid shows the main peak at 380nm (M), subpeak at 358nm (A2) and the shoulder peak at 420nm (A1). The main peak (M) is considered to be the monomer molecules. Eight kinds of aggregates of retinoic acid molecules were considered, and the shifts of absorption transition energies of the aggregates were calculated using the semiempirical electronic structure program. The results suggest that the peak A2 at 358nm should be due to the trimer of retinoic acid.
{"title":"Absorption Properties of Langmuir-Blodgett Films of Retinoic Acid","authors":"N. Kimura, Y. Nakamura, K. Imai, T. Sawada, I. Tsubono","doi":"10.1080/10587250108024683","DOIUrl":"https://doi.org/10.1080/10587250108024683","url":null,"abstract":"Abstract Retinoid molecules are the important component for photoreaction. We observed absorption spectra of the solution of retinoic acid, soaked films, and LB films. The spectrum of the solution shows the peak at 368nm. The spectrum of the soaked film could be resolved into two peaks. The peak at 370nm would be due to the monomer molecules, and the peak at 418nm would be due to the aggregate. The absorption spectrum of the LB film of retinoic acid shows the main peak at 380nm (M), subpeak at 358nm (A2) and the shoulder peak at 420nm (A1). The main peak (M) is considered to be the monomer molecules. Eight kinds of aggregates of retinoic acid molecules were considered, and the shifts of absorption transition energies of the aggregates were calculated using the semiempirical electronic structure program. The results suggest that the peak A2 at 358nm should be due to the trimer of retinoic acid.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"33 1","pages":"41 - 44"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87953038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-10-01DOI: 10.1080/10587250108024703
T. Sawadaishi, K. Ijiro, M. Shimomura, Y. Shiraishi, N. Toshima, T. Yonezawa, T. Kunitake
Abstract Two-dimensional regular patterns of nanoparticles were formed on solid substrate by casting colloidal dispersion. Periodic stripes were formed on mica surface parallel to the receding direction of casting solution. The thickness of each stripe was estimated to be comparable to that of monolayer of particles. From atomic force microscopy (AFM) and scanning electron microscopy (SEM), it was cleared that the monolayer of silica particles were hexagonally packed.
{"title":"Two-Dimensional Patterning of Nanoparticles Using Dissipative Structures","authors":"T. Sawadaishi, K. Ijiro, M. Shimomura, Y. Shiraishi, N. Toshima, T. Yonezawa, T. Kunitake","doi":"10.1080/10587250108024703","DOIUrl":"https://doi.org/10.1080/10587250108024703","url":null,"abstract":"Abstract Two-dimensional regular patterns of nanoparticles were formed on solid substrate by casting colloidal dispersion. Periodic stripes were formed on mica surface parallel to the receding direction of casting solution. The thickness of each stripe was estimated to be comparable to that of monolayer of particles. From atomic force microscopy (AFM) and scanning electron microscopy (SEM), it was cleared that the monolayer of silica particles were hexagonally packed.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"32 1","pages":"123 - 126"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90816240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-10-01DOI: 10.1080/10587250108024759
Sanghyun Joo, S. Han, K. Kim
Abstract The adsorption characteristics of (α,ω)-aliphatic dithiols on gold and silver were found to be dependent on the kind of solvent In n-hexane medium, a multilayered film was readily formed not only on gold but also on silver. The infrared spectra suggested that multilayered films on gold should possess highly disordered structures regardless of the number of layers.
{"title":"Adsorption Characteristics of Aliphatic Dithiols on Silver and Gold Revealed by Ellipsometry and FT-IR Spectroscopy","authors":"Sanghyun Joo, S. Han, K. Kim","doi":"10.1080/10587250108024759","DOIUrl":"https://doi.org/10.1080/10587250108024759","url":null,"abstract":"Abstract The adsorption characteristics of (α,ω)-aliphatic dithiols on gold and silver were found to be dependent on the kind of solvent In n-hexane medium, a multilayered film was readily formed not only on gold but also on silver. The infrared spectra suggested that multilayered films on gold should possess highly disordered structures regardless of the number of layers.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"47 1","pages":"355 - 358"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90474703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-10-01DOI: 10.1080/10587250108024753
J. Kim, Yongseon Hwang, Young Taek Kim, Kitae Song, B. Cho, H. Rhee
Abstract Polypyrrole(PPy)/LiMn2O4 composites were prepared by chemical oxidation of pyrrole onto LiMn2O4 with dodecylbenzene sulfonate as a dopant. The polymerization occurred mainly on the surface of LiMn2O4 to yield the entirely coated LiMn2O4 particles. The capacity of the cell reached the maximum of 124 mAh/g at 4.1 wt% of PPy in the active material. The composite cell showed enhanced charge-discharge properties compared with a pure LiMn2O4 cell. The PPy may enhance the electron exchange ability and stabilize the structure of LiMn2O4.
{"title":"Enhanced Electrochemical Properties of Li Secondary Batteries Using Polypyrrole/LiMn2O4 Composite Cathodes","authors":"J. Kim, Yongseon Hwang, Young Taek Kim, Kitae Song, B. Cho, H. Rhee","doi":"10.1080/10587250108024753","DOIUrl":"https://doi.org/10.1080/10587250108024753","url":null,"abstract":"Abstract Polypyrrole(PPy)/LiMn2O4 composites were prepared by chemical oxidation of pyrrole onto LiMn2O4 with dodecylbenzene sulfonate as a dopant. The polymerization occurred mainly on the surface of LiMn2O4 to yield the entirely coated LiMn2O4 particles. The capacity of the cell reached the maximum of 124 mAh/g at 4.1 wt% of PPy in the active material. The composite cell showed enhanced charge-discharge properties compared with a pure LiMn2O4 cell. The PPy may enhance the electron exchange ability and stabilize the structure of LiMn2O4.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"1 1","pages":"329 - 332"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81757894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-10-01DOI: 10.1080/10587250108024773
Myong-Hoon Lee, Jinkyu Kim, Yoonsang Cheong, Jaewook Kang, Jang-Joo Kim, Chulhee Kim
Abstract A novel photosensitive poly(amide-co-imide) was synthesized from the copolymerization of p-phenylenediacryloyl chloride, bis(3,4-dicarboxyliphenyl)hexafluoropropane dianhydride and 4,4′-oxydipehnyldiamine followed by subsequent chemical imidization. The resulting polymer showed intrinsic photosensitivity without additives, good processability in solution and high thermal stability up to 350 °C. From the refractive index measurement of the polymer by prism coupling method, it was found that the refractive index could be varied precisely with respect to the exposure time (from 1.6444 to 1.6230 for 2 μm thick film, TE mode, measured at 1.55 μm). Fabrication of passive waveguide was attempted by the photo-patterning process, i.e., photo-modulation of refractive index. Straight waveguide was easily fabricated and single mode near-field pattern was observed by using 1.55 μm near-IR light.
{"title":"Photoinduced Refractive Index Modulation of Photosensitive Polyimides and Their Application in Passive Waveguide Fabrication","authors":"Myong-Hoon Lee, Jinkyu Kim, Yoonsang Cheong, Jaewook Kang, Jang-Joo Kim, Chulhee Kim","doi":"10.1080/10587250108024773","DOIUrl":"https://doi.org/10.1080/10587250108024773","url":null,"abstract":"Abstract A novel photosensitive poly(amide-co-imide) was synthesized from the copolymerization of p-phenylenediacryloyl chloride, bis(3,4-dicarboxyliphenyl)hexafluoropropane dianhydride and 4,4′-oxydipehnyldiamine followed by subsequent chemical imidization. The resulting polymer showed intrinsic photosensitivity without additives, good processability in solution and high thermal stability up to 350 °C. From the refractive index measurement of the polymer by prism coupling method, it was found that the refractive index could be varied precisely with respect to the exposure time (from 1.6444 to 1.6230 for 2 μm thick film, TE mode, measured at 1.55 μm). Fabrication of passive waveguide was attempted by the photo-patterning process, i.e., photo-modulation of refractive index. Straight waveguide was easily fabricated and single mode near-field pattern was observed by using 1.55 μm near-IR light.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"29 1","pages":"419 - 422"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84356310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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