A Reproducible SERS Substrate Based on Electrostatically Assisted APTES-Functionalized Surface-Assembly of Gold Nanostars
Citations Over TimeTop 10% of 2011 papers
Abstract
A SERS active gold nanostar layer on the surface of ITO glass slip has been prepared by a low-cost electrostatically assisted APTES-functionalized surface-assembly method for SERS analysis. The two-dimensional morphology of the SERS substrate was examined by scanning electron microscopy. Comparative analysis revealed that the optical characteristics and SERS efficiency of these substrates varied as a function of nanostar morphology. It was found that the substrate assembled with the longest branches of nanostars generated the best SERS efficiency, whether the excitation source is 785 or 633 nm. The potential use of these substrates in detection applications was also investigated by using Nile blue A and Rhodamine 6G. The detection limits are 5 × 10(-11) M and 1 × 10(-9) M, respectively, when using the 785 nm excitation source. Apart from this high enhancement effect, the substrate here also shows extremely good reproducibility at the same time. All of these indicate that gold nanostars are a very good structure for SERS substrate assembly.
Related Papers
- → Preparation, characterization of Rhodamine 6G nanocomposites and their application in labelling cancer cells(2016)7 cited
- → Formation of nano‐dots of phenylazomethine dendrimers with Rhodamine 6G on mica(2004)11 cited
- → Rhodamine 6G (RH 6G)(2015)
- Study on the Surfactant Feature of Rhodamine 6G(2000)
- Efeito de nanopartículas metálicas na criação de agregados e nas características ópticas de Rodamina 6G(2020)