![Author ORCID: We display the ORCID iD icon alongside authors names on our website to acknowledge that the ORCiD has been authenticated when entered by the user. To view the users ORCiD record click the icon. [opens in a new tab]](https://chemrxiv.org/engage/assets/public/chemrxiv/images/logos/orcid.png)
Abstract
Surface Enhanced Raman is a promising analytical method for harmful pesticides detection. Herein, we demonstrate a rapid method to directly monitor 2,4-D pesticide in water without the need of sample pre-treatment by using Silver-Gum Arabic (Ag-GA) electrochemically co-deposited SERS substrates. The facile electrochemical synthesis of the large-area (40 µm x 20 µm) SERS substrates needs only 10 seconds, with 2 μL AgNO3 and Gum Arabic mixed solution. Different mor-phologies including Ag-GA spherical nanoparticles and nano dendrites were synthesized by tuning the deposition parame-ters. This study therefore offers a novel way to fabricate SERS substrates for rapid determination of 2,4-D pesticides down to 1 pM in deionized water and 0.15 nM in commercial bottled and also river water samples
Supplementary materials
Title
Highly Sensitive Pesticide Detection using Electrochemically Prepared Silver-Gum Arabic Nanocluster-based SERS Substrates
Description
SI includes figures about chip fabrication process, electrochemical deposition setup, chip circuit design, saccharides structure in Gum Arabic, SEM images for SERS substrate optimization, current-time plot and optical images for Ag-GA SERS substrate deposition, SERS spectra for Ag-GA bare substrate in air and in DI water, data process by Matlab, the linear calibration for commercial Gum Arabic-Ag SERS substrate, tables for the literature comparison, table for the mineral water composition.
Actions
