Patterning and photoluminescence of CdS nanocrystallites on silk fibroin fiber
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CdS nanocrystallites could be formed and assembled into nanoparticle strings and hexagons on natural silk fibroin fiber (SFF) through a room-temperature bio-inspired process. Herein, the biomaterial SFF served as reactive substrate, not only provides the in situ formation sites for CdS nanocrystallites, but also directs the arrangement of nanocrystalline CdS simultaneously. The photoluminescence (PL) of the resulting nanocomposites CdS/SFF is investigated extensively. The PL peaks observed from CdS nanoparticle strings are similar to those of separate CdS nanoparticles, corresponding to the band-edge emission of their individual building blocks (QD-CdS). Moreover, CdS nanoparticle hexagons perform a red-shifted and broadened emission peak.
KeywordsChalcogenides Nanostructures Chemical synthesis Photoluminescence spectroscopy Bio-inspired Quantum dots
Financial supports from the national Science Foundations of China (no. 50671065, no. 30870682) and the Major Fundamental Research Project of Shanghai Science and Technology Committee (no. 07DJ14001, no. 08ZR1411100) are gratefully acknowledged. The authors also thank SJTU Instrument Analysis Center for the measurements.
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