http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Self-assembly of dendritic-linear block copolymers with fixed molecular weight and block ratio
Jeong, Moon Gon,van Hest, Jan C. M.,Kim, Kyoung Taek The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.30
<P>Block copolymers built on a dendritic block having fixed molecular weight but different number of peripheral PEG chains were synthesised. At a fixed block ratio, these block copolymers exhibited topological transition of cylindrical micelles depending on the number of PEG chains.</P> <P>Graphic Abstract</P><P>Block copolymers built on a dendritic block having fixed molecular weight but different number of peripheral PEG chains were synthesised. At a fixed block ratio, these block copolymers exhibited topological transition of cylindrical micelles depending on the number of PEG chains. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cc17231c'> </P>
Kim, Tae-Gun,Lee, Jong-Gun,Park, Chan-Woo,Jo, Hong-Seok,Kim, Min-Woo,van Hest, Maikel F.A.M.,Cho, Dae-Hyung,Chung, Yong-Duck,Yoon, Sam S. Elsevier 2018 Journal of alloys and compounds Vol.739 No.-
<P><B>Abstract</B></P> <P>We demonstrate the use of supersonic spraying for the deposition of silver nanowires (AgNWs) on a flexible polyimide (PI) substrate for the formation of transparent and conducting films (TCF) as an alternative to nonflexible ITO (indium tin oxide). The self-fused intersections of the NWs resulted in films with a low sheet resistance (<I>R</I> <SUB>s</SUB> = 31 Ω/sq) and fairly high transmittance (<I>Tr</I> = 92%) on a glass substrate. The effect of the impact speed of the supersonically sprayed AgNWs on the opto-electric properties of the flexible TCF was evaluated by varying the spray coating conditions. The fabricated films were characterized by X-ray diffraction analysis, atomic force microscopy, ultraviolet–visible spectroscopy, and scanning electron microscopy. Finally, cyclic bending tests were performed on the PI/AgNW films as well as PI/ZnO/indium tin oxide/AgNW films, and the changes in their electrical properties with bending were compared.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Films of silver nanowires are deposited on polyimide by supersonic spraying. </LI> <LI> Self-fused nanowire intersections result in films with low sheet resistance. </LI> <LI> Deposited films show high transmittance. </LI> <LI> Effect of impact speed is evaluated by varying spraying conditions. </LI> <LI> Cyclic bending tests are performed to evaluate flexibility of deposited films. </LI> </UL> </P>
Yoon, Hyun,Na, Seung Heon,Choi, Jae Young,Kim, Min Woo,Kim, Hayong,An, Hee Sang,Min, Byoung Koun,Ahn, SeJin,Yun, Jae Ho,Gwak, Jihye,Yoon, KyungHoon,Kolekar, Sanjay S.,van Hest, Maikel F. A. M.,Al-Deya American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.11
<P>We have demonstrated the first example of carbon- and oxygen-free Cu(In,Ga)(SSe)<SUB>2</SUB> (CIGSSe) absorber layers prepared by electrospraying a CuInGa (CIG) precursor followed by annealing, sulfurization, and selenization at elevated temperature. X-ray diffraction and scanning electron microscopy showed that the amorphous as-deposited (CIG) precursor film was converted into polycrystalline CIGSSe with a flat-grained morphology after post-treatment. The optimal post-treatment temperature was 300 °C for annealing and 500 °C for both sulfurization and selenization, with a ramp rate of 5 °C/min. The carbon impurities in the precursor film were removed by air annealing, and oxide that was formed during annealing was removed by sulfurization. The fabricated CIGSSe solar cell showed a conversion efficiency of 4.63% for a 0.44 cm<SUP>2</SUP> area, with <I>V</I><SUB>oc</SUB> = 0.4 V, <I>J</I><SUB>sc</SUB> = 21 mA/cm<SUP>2</SUP>, and FF = 0.53.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-11/am501286d/production/images/medium/am-2014-01286d_0016.gif'></P>