| Full text | |
| Author(s): |
de Oliveira, Rafael Furlan
[1]
;
Merces, Leandro
[1, 2]
;
Vello, Tatiana Parra
[1, 3]
;
Bof Bufon, Carlos Cesar
[1, 2, 3]
Total Authors: 4
|
| Affiliation: | [1] CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas, SP - Brazil
[2] Univ Estadual Campinas, Inst Phys Gleb Wataghin IFGW, BR-13083859 Campinas, SP - Brazil
[3] Univ Estadual Campinas, Inst Chem IQ, Dept Phys Chem, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | ORGANIC ELECTRONICS; v. 31, p. 217-226, APR 2016. |
| Web of Science Citations: | 15 |
| Abstract | |
The use of aqueous solutions as the gate medium is an attractive strategy to obtain high charge carrier density (10(12) cm(-2)) and low operational voltages (<1 V) in organic transistors. Additionally, it provides a simple and favorable architecture to couple both ionic and electronic domains in a single device, which is crucial for the development of novel technologies in bioelectronics. Here, we demonstrate the operation of transistors containing copper phthalocyanine (CuPc) thin-films gated with water and discuss the charge dynamics at the CuPc/water interface. Without the need for complex multilayer patterning, or the use of surface treatments, water-gated CuPc transistors exhibited low threshold (100 +/- 20 mV) and working voltages (<1 V) compared to conventional CuPc transistors, along with similar charge carrier mobilities (1.2 +/- 0.2) x 10(-3) cm(2) V-1 s(-1). Several device characteristics such as moderate switching speeds and hysteresis, associated with high capacitances at low frequencies upon bias application (3.4 -12 mu F cm(-2)), indicate the occurrence of interfacial ion doping. Finally, water-gated CuPc OTFTs were employed in the transduction of the biospecific interaction between tripeptide reduced glutathione (GSH) and glutathione S-transferase (GST) enzyme, taking advantage of the device sensitivity and multiparametricity. (C) 2016 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 13/22127-2 - Development of novel materials strategic for integrated analytical devices |
| Grantee: | Lauro Tatsuo Kubota |
| Support Opportunities: | Research Projects - Thematic Grants |