Journal
NANO LETTERS
Volume 11, Issue 1, Pages 257-261Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl103656y
Keywords
Interferometry; real-time detection; sensing; material characterization; nanoparticles; nanofluidic; plasmonics
Categories
Funding
- NIH [1R21AI085543-01A1]
- NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES [R21AI085543] Funding Source: NIH RePORTER
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Detection and classification of nanoparticles are important for environmental monitoring, contamination mitigation, biological label tracking, and biodefense. Detection techniques involve a trade-off between sensitivity, discrimination, and speed. This paper presents a material-specific dual-color common-path interferometric detection system. Two wavelengths are simultaneously used to discriminate between 60 nm silver and 80 nm diameter gold particles in solution with a detection time of tau approximate to 1 ms. The detection technique is applicable to situations where both particle size and material are of interest.
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