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O: Fachverband Oberflächenphysik

O 100: Nanostructures at surfaces: Dots, particles, clusters II

O 100.3: Vortrag

Donnerstag, 15. März 2018, 15:45–16:00, MA 141

Highly reproducible surface-enhanced Raman scattering substrate for detection of phenolic pollutants — •Zhiqiang Zeng^1,2, Rui Xu¹, and Yong Lei¹ — ¹Technische Universität Ilmenau, 98693, Ilmenau, Germany. — ²South China Normal University, 510006,Guangzhou, China.

The ordering degree of nanostructures is the key to determining the uniformity of surface enhanced Raman scattering (SERS). However, fabrication of large-area ordered nanostructures remains a challenge, especially with the ultrahigh-density. Here, we report a fabrication of large-area ultrahigh-density ordered Ag@Al2O3/Ag core-shell nanosphere (NS) arrays with tunable nanostructures. The ultrahigh-density ordered NS arrays over a large-area capability (diameter >4.0 cm) enable the uniform SERS signals with the relative standard deviation of less than 5%. The as-fabricated highly reproducible SERS substrate can be applied to detect trace phenolic pollutants in water. This work does not only provide a new route for synthesizing the ultrahigh-density ordered nanostructures, but also create a new class of SERS substrates with high sensitivity and excellent reproducibility.