https://pubs.kist.re.kr/handle/123456789/75359 Wed, 15 Apr 2026 03:13:02 GMT 2026-04-15T03:13:02Z https://pubs.kist.re.kr/handle/201004/136904 Title: Hierarchical evolution of arrayed nanowires, nanorods, and nanosheets in ZnO Authors: Park, JH; Park, JG Abstract: Various intriguing arrayed nanostructures of ZnO, i.e., arrayed nanowires, arrayed nanorods, arrayed nanosheets, were fabricated in series by controlling the processing temperature and oxygen contents systematically based on a simple thermal evaporation process. These structures are monolithically single crystalline and the examples of spontaneous organization of vapor molecular species into nanoscale structures and their microscale assemblies or superlattices in one step. These kinds of arrayed structures might be useful in arrayed nanoscale optoelectronic and electrochemical applications. Sat, 01 Jan 2005 00:00:00 GMT https://pubs.kist.re.kr/handle/201004/136904 2005-01-01T00:00:00Z https://pubs.kist.re.kr/handle/201004/136903 Title: Enhancement of photovoltaic characteristics using a PEDOT interlayer in TiO2/MEHPPV heterojunction devices Authors: Song, MY; Kim, KJ; Kim, DY Abstract: The effect of inserting a PEDOT interlayer between the MEHPPV layer and the An electrode of a nanocrystalline ITO/TiO2/MEHPPV/Au heterojunction device on the photovoltaic characteristics of the device has been studied. The MEHPPV layer has both a light-sensitizing role and a hole-transporting function. The overall conversion efficiency of the device with a PEDOT layer is better by more than 80% than that obtainable without a PEDOT layer. The modified device shows improved photocurrent density-voltage (J-V) characteristics, in that there is a strong reduction of the roll-over behavior in the forward bias region, and an increase in the fill factor. These improvements are due to the reduction of junction resistance across the MEHPPV/Au interface in the presence of the PEDOT interlayer, which results in improved hole injection. (C) 2004 Elsevier B.V. All rights reserved. Sat, 01 Jan 2005 00:00:00 GMT https://pubs.kist.re.kr/handle/201004/136903 2005-01-01T00:00:00Z https://pubs.kist.re.kr/handle/201004/136902 Title: Preparation of maghemite nanoparticles for clinical applications Authors: Woo, K.; Lee, H.J. Abstract: The synthesis of nearly monodisperse, roughly spherical, and non-aggregated maghemite (γ-Fe2O3) nanoparticles (average diameter = 5.5 nm, standard deviation = 0.7 nm over 100 particles) is reported. We utilized a sol-gel reaction of common ferric salt in reverse micelles and then, crystallization of the gel particles by reflux. The nanoparticles show superparamagnetic behavior and are expected to be useful for clinical applications. Sat, 01 Jan 2005 00:00:00 GMT https://pubs.kist.re.kr/handle/201004/136902 2005-01-01T00:00:00Z https://pubs.kist.re.kr/handle/201004/136901 Title: The photovoltaic effect of the p-n heterojunction organic photovoltaic device using a nano template method Authors: Oh, S.-W.; Woo, Rhee H.; Lee, C.; Chul, Kim Y.; Kim, Jai Kyeong; Yu, J.-W. Abstract: Characteristics of ITO/polypyrrole (PPy) nano fibers/poly(3-hexylthiophene)/Al photovoltaic devices prepared by nano template method were studied. PPy nano fibers on ITO glass were formed through nano pores of polymer membrane template using home made special sample holder by electrochemical polymerization in an electrolyte solution of pyrrole and lithium perchlorate as a dopant in acetonitrile. Ordered structure with enhanced interfacial area formed by nano template method enable to fabricate polymeric photovoltaic device with improved photo-conversion efficiency. This nano fiber structures film possesses increased interfacial area, large charge separation area (photoactive zone) and secured charge transportation route. The effect of altering energy levels of PPy by changing doped state was also studied. Device made with nano fiber structure showed enhanced photovoltaic effect than that of overlayed film device. ？ 2004 Elsevier B.V. All rights reserved. Sat, 01 Jan 2005 00:00:00 GMT https://pubs.kist.re.kr/handle/201004/136901 2005-01-01T00:00:00Z