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Lee, Seungjin,Kim, Youngwoong,Wu, Ziang,Lee, Changyeon,Oh, Seung Jin,Luan, Nguyen Thanh,Lee, Junbok,Jeong, Dahyun,Zhang, Kai,Huang, Fei,Kim, Taek-Soo,Woo, Han Young,Kim, Bumjoon J. American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.48
<P>Aqueous-processed all-polymer solar cells (aq-APSCs) are reported for the first time by developing a series of water/ethanol-soluble naphthalenediimide (NDI)-based polymer acceptors [P(NDIDEG-T), P(NDITEG-T), and P(NDITEG-T2)]. Polymer acceptors are designed by using the backbones of NDI-bithiophene and NDI-thiophene in combination with nonionic hydrophilic oligoethylene glycol (OEG) side chains that facilitate processability in water/ethanol mixtures. All three polymers exhibit sufficient solubility (20-50 mg mL<SUP>-1</SUP>) in the aqueous medium. The P(NDIDEG-T) polymer with shorter OEG side chains is the most crystalline with the highest electron mobility, enabling the fabrication of efficient aq-APSCs with the maximum power conversion efficiency (PCE) of 2.15%. Furthermore, these aq-APSCs are fabricated under ambient atmosphere by taking advantage of the eco-friendly aqueous process and, importantly, the devices exhibit outstanding air-stability without any encapsulation, as evident by maintaining more than 90% of the initial PCE in the air after 4 days. According to a double cantilever beam test, the interfacial adhesion properties between the active layer and electron/hole transporting layers were remarkably improved by incorporating the hydrophilic OEG-attached photoactive layer, which hinders the delamination of the constituent layers and prevents the increase of series resistance, ultimately leading to enhanced durability under ambient conditions. The combination of increased device stability and minimal environmental impact of these aq-APSCs demonstrates them to be worthy candidates for continued development of scalable polymer solar cells.</P> [FIG OMISSION]</BR>
Discovery of a Very Large (≈20 kpc) Galaxy at <i>z</i> = 3.72
Lee, Kyoung-Soo,Dey, Arjun,Matheson, Thomas,Shi, Ke,Hung, Chao-Ling,Xue, Rui,Inami, Hanae,Huang, Yun,Lee, Khee-Gan,Ashby, Matthew L. N.,Jannuzi, Buell,Reddy, Naveen,Hong, Sungryong,Mo, Wenli,Malavasi, American Astronomical Society 2018 The Astrophysical journal Vol.862 No.1
<P>We report the discovery and spectroscopic confirmation of a very large star-forming galaxy, G6025, at z(spec) = 3.721 +/- 0.003. In the rest frame approximate to 2100 angstrom, G6025 subtends approximate to 24 kpc in physical extent when measured from the 1.5 sigma isophote, in agreement with the parametric size measurements that yield a half-light radius of 4.9 +/- 0.5 kpc and a semimajor axis of 12.5 +/- 0.1 kpc. It is also very UV-luminous (approximate to 5L(UV,z similar to 4)*) and young (approximate to 140 +/- 60 Myr). Despite its unusual size and luminosity, the stellar population parameters and dust reddening (M-star similar to M-z similar to 4*( )and E(B - V) similar to 0.18 +/- 0.05) estimated from the integrated light are similar to those of smaller galaxies at comparable redshifts. The ground-based morphology and spectroscopy show two dominant components, both located off-center, embedded in more diffuse emission. We speculate that G6025 may be a scaled-up version of chain galaxies seen in deep HST imaging or, alternatively, a nearly equal-mass merger involving two super-L* galaxies in its early stage. It lies close to but not within a known massive protocluster at z = 3.78. We find four companions within 6 Mpc from G6025, two of which lie within 1.6 Mpc. While the limited sensitivity of the existing spectroscopy does not allow us to robustly characterize the local environment of G6025, it likely resides in a locally overdense environment. The luminosity, size, and youth of G6025 make it uniquely suited to study the early formation of massive galaxies in the universe.</P>
Ra Mi Lee,Rae Hyung Ryu,Seong Won Jeong,Soo Jin Oh,Hue Huang,Jin Soo Han,Chi Ho Lee,C. Justin Lee,Lily Yeh Jan,Sang Min Jeong 한국실험동물학회 2011 Laboratory Animal Research Vol.27 No.2
To clone the first anion channel from Xenopus laevis (X. laevis), we isolated a calcium-activated chloride channel (CLCA)-like membrane protein 6 gene (CMP6) in X. laevis. As a first step in gene isolation, an expressed sequence tags database was screened to find the partial cDNA fragment. A putative partial cDNA sequence was obtained by comparison with rat CLCAs identified in our laboratory. First stranded cDNA was synthesized by reverse transcription polymerase-chain reaction (RT-PCR) using a specific primer designed for the target cDNA. Repeating the 5’ and 3’ rapid amplification of cDNA ends, fulllength cDNA was constructed from the cDNA pool. The full-length CMP6 cDNA completed via 5’- and 3’-RACE was 2,940 bp long and had an open reading frame (ORF) of 940 amino acids. The predicted 940 polypeptides have four major transmembrane domains and showed about 50% identity with that of rat brain CLCAs in our previously published data. Semi-quantification analysis revealed that CMP6 was most abundantly expressed in small intestine, colon and liver. However, all tissues except small intestine, colon and liver had undetectable levels. This result became more credible after we did real-time PCR quantification for the target gene. In view of all CLCA studies focused on human or murine channels, this finding suggests a hypothetical protein as an ion channel, an X. laevis CLCA.
HUANG, NAN-JING,LEE, BYUNG SOO,KANG, MEE KWANG 동의대학교 기초과학연구소 1998 基礎科學硏究論文集 Vol.8 No.1
Some common fixed point theorems for compatible mappings are shown. As an application, the existence and uniqueness of common solutions for a class of functional equations arising in dynamic programmings are discussed.
Rho-kinase/AMPK axis regulates hepatic lipogenesis during overnutrition
Huang, Hu,Lee, Seung-Hwan,Sousa-Lima, Inê,s,Kim, Sang Soo,Hwang, Won Min,Dagon, Yossi,Yang, Won-Mo,Cho, Sungman,Kang, Min-Cheol,Seo, Ji A.,Shibata, Munehiko,Cho, Hyunsoo,Belew, Getachew Debas,Bhi American Society for Clinical Investigation 2018 The Journal of clinical investigation Vol.128 No.12
Self-assembly of Dumbbell-shaped Rod Amphiphiles Based on Dodeca-p-phenylene
Huang, Zhegang,Liu, Libin,Lee, Eun-Ji,Lee, Myong-Soo Korean Chemical Society 2008 Bulletin of the Korean Chemical Society Vol.29 No.8
Dumbbell-shaped aromatic amphiphilic molecules consisting of a dodeca-p-phenylene as a rigid segment and oligoether dendrons as a flexible chains were synthesized, characterized, and their aggregation behavior was investigated in the bulk and at the air-water interface. In contrast to the molecule 2 which shows a nematic liquid crystalline state, molecule 1 based on shorter dendritic chains was observed to self-assemble into a 3-D primitive orthorhombic supercrystal. And molecule 1 at the air-water interface was observed to reorganize from circular plates to ring structures by lateral compressions.
Multivalent Nanofibers of a Controlled Length: Regulation of Bacterial Cell Agglutination
Lee, Dong-Woo,Kim, Taehoon,Park, Il-Soo,Huang, Zhegang,Lee, Myongsoo American Chemical Society 2012 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.134 No.36
<P>Control of the size and shape of molecular assemblies on the nanometer scale in aqueous solutions is very important for the regulation of biological functions. Among the well-defined supramolecular structures of organic amphiphiles, one-dimensional nanofibers have attracted much attention because of their potential applications in biocompatible materials. Although much progress has been made in the field of self-assembled nanofibers, the ability to control the fiber length remains limited. The approach for control of the fiber length presented herein overcomes this limitation through the coassembly of amphiphilic rod–coil molecules in which the crystallinity of the aromatic segment can be regulated by π–π stacking interactions. The introduction of carbohydrate segments into the fiber exterior endows the nanofibers with the ability to adhere to bacterial cells. Notably, the fiber length systematically regulates the agglutination and proliferation of bacterial cells exposed to these fibers.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2012/jacsat.2012.134.issue-36/ja306802m/production/images/medium/ja-2012-06802m_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja306802m'>ACS Electronic Supporting Info</A></P>
Behavior of residual stress in plasma sprayed ZrO₂ coatings with different contents of LaPO₄
Soo Wohn Lee,Jia Zhang,Huang Chen,Tohru Sekino,Seung Ho Kim 한양대학교 세라믹연구소 2008 Journal of Ceramic Processing Research Vol.9 No.6
In this study, ZrO2-LaPO4 composite coatings were deposited by a plasma spraying technique. For nondestructive evaluation and easy practicability, the X-ray diffraction method was chosen to determine the residual stress in plasma sprayed ZrO2- LaPO4 composite coatings. The relationship between residual stress and content of LaPO4 was investigated. In this study, ZrO2-LaPO4 composite coatings were deposited by a plasma spraying technique. For nondestructive evaluation and easy practicability, the X-ray diffraction method was chosen to determine the residual stress in plasma sprayed ZrO2- LaPO4 composite coatings. The relationship between residual stress and content of LaPO4 was investigated.