Nanosensing platforms: physics, technology, and applications

Edwin T. Carlen; Songyue Chen; Mingliang Jin; Arpita De; Jan van Nieuwkasteele; Johan Bomer

doi:10.1117/12.920540

4 May 2012 Nanosensing platforms: physics, technology, and applications

Edwin T. Carlen, Songyue Chen, Mingliang Jin, Arpita De, Jan van Nieuwkasteele, Johan Bomer

Proceedings Volume 8371, Sensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring II; and Biometric Technology for Human Identification IX; 837110 (2012) https://doi.org/10.1117/12.920540
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

Novel nanotextured Au surfaces are presented with periodically self-aligned nanopyramid structures with precisely defined pitch that are closely packed with 2 nm separation gaps over large areas and form high-density (~1 km cm^-2) arrays of hot-spot scattering sites ideally suited for surface-enhanced Raman scattering (SERS) and Raman spectroscopy. Average Raman enhancement factors from physically adsorbed rhodamine 6G on patterned Au surfaces resulted in EF~10⁶. The Raman average EF has been characterized over large areas using benzenethiol monolayers chemisorbed on the Au nanopyramid surfaces. From the 1074 cm^-1 ring mode of BT on surfaces with 200 nm pitch the EF=(0.8±0.04)×10⁶, and for surfaces with 500 nm pitch the EF=(0.32±0.01)×10⁷ from over 99% of the imaged area. Maximum EF>10⁸ have been measured in both cases.

Citation Download Citation

Edwin T. Carlen, Songyue Chen, Mingliang Jin, Arpita De, Jan van Nieuwkasteele, and Johan Bomer "Nanosensing platforms: physics, technology, and applications", Proc. SPIE 8371, Sensing Technologies for Global Health, Military Medicine, Disaster Response, and Environmental Monitoring II; and Biometric Technology for Human Identification IX, 837110 (4 May 2012); https://doi.org/10.1117/12.920540

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KEYWORDS

Raman spectroscopy

Molecules

Gold

Raman scattering

Metals

Nanostructures

Surface enhanced Raman spectroscopy

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