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- Title
Self-assembled nanoparticle arrays for multiphase trace analyte detection.
- Authors
Cecchini, Michael P.; Turek, Vladimir A.; Paget, Jack; Kornyshev, Alexei A.; Edel, Joshua B.
- Abstract
Nanoplasmonic structures designed for trace analyte detection using surface-enhanced Raman spectroscopy typically require sophisticated nanofabrication techniques. An alternative to fabricating such substrates is to rely on self-assembly of nanoparticles into close-packed arrays at liquid/liquid or liquid/air interfaces. The density of the arrays can be controlled by modifying the nanoparticle functionality, pH of the solution and salt concentration. Importantly, these arrays are robust, self-healing, reproducible and extremely easy to handle. Here, we report on the use of such platforms formed by Au nanoparticles for the detection of multi-analytes from the aqueous, organic or air phases. The interfacial area of the Au array in our system is ?25?mm2 and can be made smaller, making this platform ideal for small-volume samples, low concentrations and trace analytes. Importantly, the ease of assembly and rapid detection make this platform ideal for in-the-field sample testing of toxins, explosives, narcotics or other hazardous chemicals.
- Subjects
MOLECULAR self-assembly; NANOPARTICLES; MULTIPHASE flow; NANOSTRUCTURED materials; SURFACE enhanced Raman effect; MICROFABRICATION; AQUEOUS solutions
- Publication
Nature Materials, 2013, Vol 12, Issue 2, p165
- ISSN
1476-1122
- Publication type
Article
- DOI
10.1038/nmat3488