Sammanfattning
Distinguishing structural isomers is a critical and challenging task for biotechnology, chemical industry, and environmental monitoring. Approaches currently available are limited in terms of selectivity and simplicity. In this paper, a highly sensitive organic field-effect transistor (OFET) using the cyclopentadithiophene-benzothiadiazole (CDT-BTZ) copolymers as a semiconductor is presented for easy and selective detection of different families of structural isomers, as well as between different isomers within each family. High accuracy discrimination is achieved over a range of concentrations using only a single sensing parameter derived from the OFET characteristic transfer curve. As a reference, other homopolymer- and donor-acceptor copolymer-based OFET sensors are examined but do not have an equivalent sensing performance to that of the CDT-BTZ-based OFETs. Investigating the link between isomer absorption and swelling, supramolecular order and energy levels of the active layer reveals a unique effect of each isomer on the energy bands of the semiconducting polymer.
Originalspråk | Odefinierat/okänt |
---|---|
Sidor (från-till) | – |
Antal sidor | 8 |
Tidskrift | Advanced Functional Materials |
Volym | 29 |
Utgåva | 9 |
DOI | |
Status | Publicerad - 2019 |
MoE-publikationstyp | A1 Tidskriftsartikel-refererad |
Nyckelord
- donor-acceptor copolymers
- isomers
- xylenes
- organic field-effect transistor