Affiliation:
1. Neuroelectronics – Munich Institute of Biomedical Engineering Department of Electrical Engineering TUM School of Computation Information and Technology Technical University of Munich Hans‐Piloty‐Str. 1 85748 Garching Germany
2. Hoffmann + Krippner GmbH Siemensstrasse 1 74722 Buchen Germany
Abstract
AbstractWith the ever‐growing presence of silver nanoparticles in consumer products, there is a need for cost‐effective and on‐site monitoring of their influence on our environment. Herein, we report the use of screen‐printed and laser‐ablated microelectrode arrays (SPMEAs) for the electrochemical detection of 20 nm‐sized silver nanoparticles (AgNPs) via collision electrochemistry. The electrodes’ morphology is optically analyzed and their electrochemical properties later characterized using cyclic voltammetry and impedance spectroscopy. The SPMEAs are calibrated using a AgNP concentration range of 1 to 100 pM, resulting in a linear dependency of 22 mHz pM−1 for the impact frequency. Finally, to demonstrate the possibility of future on‐site applications, an in‐house built portable nanoparticle detection (POND) device is used to measure Faradaic AgNP impacts on a SPMEA, in a solution contaminated with urea.
Funder
Deutsche Forschungsgemeinschaft
Subject
Industrial and Manufacturing Engineering,Mechanics of Materials,General Materials Science