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dc.contributor.authorPeng, Boen
dc.contributor.authorLi, Guangyuanen
dc.contributor.authorLi, Dehuien
dc.contributor.authorDodson, Stephanieen
dc.contributor.authorZhang, Qingen
dc.contributor.authorZhang, Junen
dc.contributor.authorLee, Yih Hongen
dc.contributor.authorDemir, Hilmi Volkanen
dc.contributor.authorLing, Xing Yien
dc.contributor.authorXiong, Qihuaen
dc.identifier.citationPeng, B., Li, G., Li, D., Dodson, S., Zhang, Q., Zhang, J., et al. (2013). Vertically Aligned Gold Nanorod Monolayer on Arbitrary Substrates: Self-Assembly and Femtomolar Detection of Food Contaminants. ACS Nano, 7(7), 5993-6000.en
dc.description.abstractPublic attention to the food scandals raises an urgent need to develop effective and reliable methods to detect food contaminants. The current prevailing detections are primarily based upon liquid chromatography, mass spectroscopy, or colorimetric methods, which usually require sophisticated and time-consuming steps or sample preparation. Herein, we develop a facile strategy to assemble the vertically aligned monolayer of Au nanorods with a nominal 0.8 nm gap distance and demonstrate their applications in the rapid detection of plasticizers and melamine contamination at femtomolar level by surface-enhanced Raman scattering spectroscopy (SERS). The SERS signals of plasticizers are sensitive down to 0.9 fM concentrations in orange juices. It is the lowest detection limit reported to date, which is 7 orders of magnitude lower than the standard of United States (6 ppb). The highly organized vertical arrays generate the reproducible “SERS-active sites” and can be achieved on arbitrary substrates, ranging from silicon, gallium nitride, glass to flexible poly(ethylene naphthalate) substrates.en
dc.relation.ispartofseriesACS nanoen
dc.titleVertically aligned gold nanorod monolayer on arbitrary substrates : self-assembly and femtomolar detection of food contaminantsen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen
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