Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Hoosung Lee"'
Autor:
Hoosung Lee, Yong Bae Park
Publikováno v:
Applied Sciences, Vol 12, Iss 21, p 10717 (2022)
In this paper, we designed a flexible antenna operating in the WLAN/C-band/X-band and analyzed the antenna bending characteristics. It is advantageous to have a wide bandwidth because the resonant frequency of the flexible antenna can be changed when
Externí odkaz:
https://doaj.org/article/1c8ad852b39444f7b7e172ac7829b7ce
Publikováno v:
Applied Sciences, Vol 11, Iss 21, p 10002 (2021)
This paper presents a systematic parameter study on mesh pattern for optically transparent flexible antenna with feedline. In implementing a transparent flexible antenna using a metal mesh, transparency and performance of antenna and feedline are opp
Externí odkaz:
https://doaj.org/article/73ca55323d8c44b28f3a7729de178312
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 46:2097-2107
We have demonstrated that unsubstituted thiophene can be polymerized by Fe 3þ -catalyzed oxidative polymerization inside nanosized thiophene monomer droplets, that is, nanoreactors, dispersed in aqueous medium, which can be per- formed under acidic
Autor:
Joo Hyun Kim, Hoosung Lee
Publikováno v:
Synthetic Metals. 157:1040-1045
A series of the statistical copolymers of tetradecyloxy-3,5-bis-{2-(4-bromo-phenyl)-[1,3,4]oxadiazole}-benzene ( 4 ), 1,4-didecyloxy-2,5-diiodobenzene ( 5 ) and 1,4-dodecyloxy-2,5-divinylbenzene ( 6 ), for efficient light emitting diode were synthesi
Publikováno v:
Synthetic Metals. 157:603-610
We synthesized novel carbazole-based push–pull type nonlinear optical (NLO) polymers, P(Cz-CN), P(Cz-DR 19), and P(Cz-TCN). The structure of P(Cz-CN) was designed to contain di-acceptor-chromophores in the main chain and to have a two-dimensional (
Publikováno v:
Synthetic Metals. 157:627-631
We report on the synthesis and optical properties of a novel oligomer (oligo(2-{2-but-1-enyl-6-[2-(9-decyl-6-formyl-9 H -carbazol-3-yl)-vinyl]-pyran-4-ylidene}-malononitrile)) (Olg(Cz–Pyr–CN)) with an average degree of polymerization three. The m
Publikováno v:
Synthetic Metals. 157:597-602
In order to elucidate the origin of the photoluminescence (PL) of polypyrrole (PPy) colloids, several PPy colloidal samples were prepared under various emulsifying conditions and their PL properties were correlated with the particle morphologies. Whi
Publikováno v:
Optical Materials. 29:1518-1522
We have synthesized two new donor-fluorene-donor type organic dyes (JFJ and TFT) which contain an alkyl fluorene unit bridging two donor groups. In order to enhance the two photon absorption efficiency the molecules were designed for facile donation
Publikováno v:
Dyes and Pigments. 75:567-573
Three kinds of carbazole derived dyes, Caz-MN, Caz-Fu, and Caz-Vm-MN of push–pull molecules were synthesized and their nonlinear optical properties measured. The second harmonic generation (SHG) coefficients, d33, of Caz-Fu/PVK[poly(9-vinylcarbazol
Publikováno v:
Reactive and Functional Polymers. 66:1506-1514
Poly{[9-(4-hexyloxyphenyl)-9-methoxyfluorene-2,7-diyl]-alt-co-[1,4-(2,5-bisdodecyloxy)phenylenevinylene]} [P(PV-FOMe)] was synthesized and its optical property changes upon exposure to various Lewis acids were studied. The fluorescence emission of th