Tuning interfacial energy barriers in heterojunctions for anti‐interference sensing
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Analytes with similar redox properties are normally difficult to distinguish through classic electrochemical methods. This becomes especially true for the on‐site detection in seawater where the high salinity and complex chemical components can impose severe interference. Hereby introducing numerous nanoscale heterojunctions in the Cu/CuO/reduced graphene oxide (rGO)/polypyrrole (PPy) and Cu/CuO/rGO/chitosan electrochemical sensors, tunable interfacial energy barriers to exponentially regulate the electrochemical signal can be constructed. Importantly, these energy barriers are independent to redox but closely related to the electrostatic interaction from absorbed charged analytes such as Hg2+ and Cu2+. Moreover, the similar sensing principle is also valid for the energy barriers in p‐n junctions as demonstrated in the Ni/NiO/ZnO/PPy sensor. The good anti‐interference properties and ultrahigh sensitivity of this sensing mode offers new opportunities in trace analyte detection in harsh environments such as seawater.
Date Issued
2021-02-10
Date Acceptance
2020-11-03
Citation
Advanced Functional Materials, 2021, 31 (7)
ISSN
1616-301X
Publisher
Wiley
Journal / Book Title
Advanced Functional Materials
Volume
31
Issue
7
Copyright Statement
© 2020 Wiley‐VCH GmbH. This is the accepted version of the following article: Zhao, M., Yu, J., Zhang, X., Li, Z., Ding, Y., Edel, J. B., Ma, Y., Li, H., Tuning Interfacial Energy Barriers in Heterojunctions for Anti‐Interference Sensing. Adv. Funct. Mater. 2020, 2008604, which has been published in final form at https://doi.org/10.1002/adfm.202008604
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Commission of the European Communities
Commission of the European Communities
Identifier
https://onlinelibrary.wiley.com/doi/10.1002/adfm.202008604
Grant Number
EP/L02098X/1
724300
875525
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
energy barriers
heterojunctions
nano‐
interfaces
semiconductors
sensors
GLASSY-CARBON ELECTRODE
ELECTROCHEMICAL DETECTION
VOLTAMMETRIC DETECTION
GRAPHENE OXIDE
HEAVY-METALS
MERCURY(II)
ADSORBENT
REMOVAL
HG(II)
IONS
02 Physical Sciences
03 Chemical Sciences
09 Engineering
Materials
Publication Status
Published
Article Number
ARTN 2008604
Date Publish Online
2020-11-17