Abstract
An ultrasensitive micro sensor for the detection of trace lead (II) is fabricated by mixed dispersion solution of bismuth nanoparticles (Bi NPs) and PDDA, and layer-by-layer self-assembled (LBL SA) with graphene (G) suspension solution on a micro gold electrode. The LBL SA G-Bi NPs sensor performance has been greatly enhanced in determination of Pb (II) using anodic stripping voltammetry (ASV). Compared with a sensor without surface modification, the sensor's stripping peak potential decreased from -0.520 V to -0.564 V, and its peak current increased from 1.227 μA to 8.372 μA. Compared with a sensor modified by LBL SA G (without Bi NPs), stripping peak potential decreased from -0.548 V to -0.572 V, the sensor's peak current increased from 0.284 μA to 1.263 μA. This sensor's limit of detection (LOD) of Pb (II) was achieved as 0.078 ppb with a sensitivity of 1.061 μA/ppb. This simple but effective graphene-metal nanocomposites construction method can be widely used in the development of highly sensitive ion sensor.
| Original language | English (US) |
|---|---|
| Title of host publication | 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems, MEMS 2017 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 1083-1086 |
| Number of pages | 4 |
| ISBN (Electronic) | 9781509050789 |
| DOIs | |
| State | Published - Feb 23 2017 |
| Event | 30th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2017 - Las Vegas, United States Duration: Jan 22 2017 → Jan 26 2017 |
Publication series
| Name | Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS) |
|---|---|
| ISSN (Print) | 1084-6999 |
Other
| Other | 30th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2017 |
|---|---|
| Country/Territory | United States |
| City | Las Vegas |
| Period | 1/22/17 → 1/26/17 |
Bibliographical note
Publisher Copyright:© 2017 IEEE.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.