Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 131, Issue 16, Pages -Publisher
WILEY
DOI: 10.1002/app.40634
Keywords
composites; emulsion polymerization; stimuli-sensitive polymers
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Funding
- National Science Foundation for Distinguished Young Scholars of China [21225626]
- Key Program of the National Natural Science Foundation of China [20936002]
- Program of International ST Cooperation [2012DFA51050]
- project of scientific research innovation of Jiangsu province for doctor [CXZZ12-0437]
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Hybrid nanoparticles composed of polydiacetylene (PDA) and magnetite (Fe3O4) were fabricated by a double-emulsion method. The structure and composite form of the hybrid nanoparticles were investigated with transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, and dynamic light scattering. The successful incorporation of magnetism to an attractive class of colorimetric PDA sensors was demonstrated. Compared with the PDA vesicles, the hybrid nanoparticles showed better colloidal stability with ethanol stimuli. In this study, we explored the colorimetric sensing ability of the hybrid nanoparticles in response to sodium cetyltrimethylammonium bromide (CTAB). The results show a high sensitivity to CTAB with a limit of detection at 30 M. The biotin-streptavidin interaction was used as a sensing model to test ligand-receptor interactions on the hybrid nanoparticles' response. The concentration dependence of the chromic response was observed with the limit of visual detection at 20 g/mL. The Fe3O4-PDA hybrid nanoparticles might have great potential applications in biosensing because of their advantages, including separation and sensing. (c) 2014 Wiley Periodicals, Inc.
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