Browsing by Author "Lin, Z."
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Item Learning Through Observation or Through Acquisition? Innovation Performance as an Outcome of Internal and External Knowledge Combination(Springer New York LLC, 2019-06-08) Jiang, M. S.; Jiao, J.; Lin, Z.; Xia, Jun; Xia, JunAlthough the importance of external and internal knowledge combination for innovation is well recognized, the effectiveness of different patterns of combination requires further investigation. We consider spillovers of foreign direct investment (FDI) and external research and development (R&D) as two sources of external knowledge to domestic firms and argue that the effectiveness of incorporating the two external sources of knowledge varies conditional upon different levels of internal knowledge development (internal R&D). We argue that learning through observation and learning through acquisition are important mechanisms making such difference. Using a sample of manufacturing firms in China from 2002 to 2007, we find that rhythmic FDI spillover and external R&D positively affect innovation performance. However, the effect of rhythmic FDI spillover is stronger, whereas the effect of external R&D is weaker for firms with a moderate level of internal R&D than firms with a low or high level of internal R&D. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.Item Self-Assembly of a Conjugated Triblock Copolymer at the Air-Water Interface(2013-06-27) Zhao, L.; Feng, C.; Pang, X.; Jung, J.; Stefan, Mihaela C.; Sista, Prakash; Han, R.; Fang, N.; Lin, Z.; Stefan, Mihaela C.Controlling the self-assembly of highly luminescent conjugated polymers is essential for preparing various optoelectronic devices. In this study, a polyisoprene-b-polystyrene-b-poly(3-hexylthiophene) (PI-PS-P3HT) triblock copolymer was synthesized and readily self-assembled into network-like morphologies via dewetting at the air-water interface. Interestingly, the monolayer thick film displayed high photoluminescence (PL) as a result of successfully transferring the amorphous conjugated P3HT chains in the PI-PS-P3HT triblock copolymer from the solution state to the solid state. A model was proposed to illustrate the supramolecular organization of the PI-PS-P3HT monolayer. To the best of our knowledge, this is the first study of a hydrophobic conjugated block copolymer at the air-water interface, from which the conjugated polymer-based monolayer with highly efficient PL formed by dewetting was achieved.