Adsorbate enrichment on a zeolite surface and assembly of a SERS sensor: a case study with silver nanoparticles and the flavonoid catechin |
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| Authors: | Chia-Chi Huang Chi-Yun Cheng Chao-Ting Chou Wenlung Chen |
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| Affiliation: | Department of Applied Chemistry, National Chiayi University, No. 300 Syuefu Rd, Chiayi City 60004 Taiwan, Fax: +886-5-2717901, +886-5-2717967, +886-5-2717965 |
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| Abstract: | We have studied the adsorption of silver nanoparticles (AgNPs) and catechin on readily available commercial zeolite beads. Both adsorbates became available on the zeolite and were several fold more concentrated after a simple adsorption process, contributing to a 10-times overall increase in the collision probability between the two adsorbates. We were further able to detect AgNP-induced Surface Enhanced Raman Scattering (SERS) of catechin on the zeolite after sequential depositions of AgNPs and catechin on the zeolite using this process. To demonstrate high reproducibility, 93% of the zeolite sensors assembled this way were tested and proved satisfactory, and gave a distinctive catechin SERS signature. Preparation of the zeolite sensor was extremely easy with a nearly 90% yield.Adsorbate enrichment on zeolite surface and assembly of a SERS sensor. |
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