High-mobility bio-organic field effect transistors with photoreactive DNAs as gate insulators

Abstract

Organic-soluble DNAs bearing chalcone moieties were synthesized by using purified natural sodium DNA. In addition to the chalcone-containing DNA homopolymer (CcDNA), a copolymer (CTMADNA-co-CcDNA) was synthesized. They were employed as gate insulators for fabricating organic thin-film transistors. An organic semiconductor (5,5′-(9,10-bis((4-hexylphenyl)ethynyl)anthracene-2,6-yl-diyl)bis(ethyne-2,1-diyl)bis(2-hexylthiophene; HB-ant-THT) was deposited on the photocrosslinked DNA-based gate insulators via a solution process. Interestingly, the resulting TFT devices had extremely high field-effect mobilities, and their corresponding transfer curves indicated low hysteresis. The carrier mobility of the device with HB-ant-THT deposited on the CTMADNA-co-CcDNA gate insulator was the best, i.e., 0.31 cm2 V−1 s−1 (Ion/Ioff=1.0×104).

DNA as Functional Material in Organic-Based Electronics

“…The mechanism of the memorizing effect caused by the DNA gate dielectrics remains poorly understood. Some of the researchers attribute the hysteresis behavior to the mobile ion impurities [29,30]. However, Liang et al [19] demonstrated the memory window still exists even in a much lower temperature region, as shown in Figure 4.…”

Latest advances in biomaterials: from deoxyribonucleic acid to nucleobases

“…16 Previous work on a crosslinked DNA-based biopolymer, when used as a gate insulator in a thin film transistor (TFT), contributed to the reduction of hysteresis caused by ion migration leading to enhanced device operation. 17,18 We have come up with a new crosslinking method which will be addressed later in this paper.…”

Fabrication and characterization of OTFT memory based on DNA gate dielectric

“…For instance, organic field effect transistors, optical amplifiers 5 , conductive, semiconductive nanowires 6 , and nonlinear optical electro-optic modulators have been fabricated from DNA-based biopolymers. Such devices have demonstrated high performance that exceeds that of state-of-the-art devices made with currently available organic based materials [7][8][9][10][11] . In our study, we have already reported the organic light-emitting diodes fabricated with DNA as a template of charge transport materials and light-emitting materials 12,13 .…”