Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 64, Issue 3, Pages 596-607Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.5b05495
Keywords
zein; SERS; surface adsorption; self-aggregation
Funding
- University Grants Commission's Scheme of University With Potential for Excellence
- CAS agreement of WLU, Waterloo
- Research and Development Council (RDC) of Newfoundland and Labrador
- NSERC
- Office of Applied Research at CNA
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Zein, an industrially important protein, is characterized in terms of its food and pharmaceutical coating applications by using surface enhanced Raman spectroscopy (SERS) on Au, Ag, and PbS nanoparticles (NPs). Its specific surface adsorption behavior on Ag NPs produced self-assembled zein nanocubes which demonstrated on and off SERS activity. Both SERS characterization as well as nanocube formation of zein helped us to understand the complex protein aggregation behavior in shape controlled morphologies, a process with significant ramifications in protein crystallization to achieve ordered morphologies. Interestingly, nanocube formation was promoted in the presence of Ag rather than Au or PbS NPs under in situ synthesis and discussed in terms of specific adsorption. Zein fingerprinting was much more clear and enhanced on Au surface in comparison to Ag while PbS did not demonstrate SERS due to its semiconducting nature.
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