Assembly of π‐Conjugated Nanosystems for Electronic Sensing Devices

Zhang, Congcong; Wang, Yu; Cheng, Shanshan; Zhang, Xiaotao; Fu, Beibei; Hu, Xiaotian

doi:10.1002/aelm.201700209

Cited by 11 publications

(4 citation statements)

References 103 publications

(274 reference statements)

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“…Subsequently, carriers are injected from the source electrode to the drain electrode under the source-drain voltage (V ds ). 18 To evaluate the performance of OTFTs, several parameters, including μ, I on /I off , and V th are calculated via transfer and output curves. Among these parameters, μ is extracted through transfer curve in either the linear regime (I ds = WμC i (V g − V th )/L) or the saturation regime (I ds = WμC i (V g − V th ) 2 /2 L).…”

Section: The Structure and Operational Mechanism Of Otftsmentioning

confidence: 99%

“…When a gate voltage ( V g ) is applied, carriers are induced at the interface between the OSC layer and dielectric layer, forming a conductive channel. Subsequently, carriers are injected from the source electrode to the drain electrode under the source‐drain voltage ( V ds ) 18 . To evaluate the performance of OTFTs, several parameters, including μ , I on / I off , and V th are calculated via transfer and output curves.…”

Section: The Structure and Operational Mechanism Of Otftsmentioning

confidence: 99%

See 1 more Smart Citation

Organic thin film transistors‐based biosensors

Sun

Wang

Auwalu

et al. 2021

EcoMat

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Organic thin film transistors (OTFTs)-based biosensors are widely applied as advanced biosensing platforms by virtue of their inherent ability to transfer and amplify received biological signals into electrical signals. Nevertheless, the development of OTFTs-based biosensors with excellent sensitivity, selectivity, and stability for specific biological processes remains a major challenge. This mini review focuses on recent achievements in OTFTs-based biosensors since 2010. Specifically, three types of OTFTs, specifically organic field-effect transistors (OFETs), electrolyte-gated OFETs (EGOFETs), and organic electrochemical transistors (OECTs) are summarized in terms of the key strategies required for highperformance bioelectronics. Additionally, various OTFTs-based biosensors, such as ions, glucose, nucleic acids, proteins, and cells are described in terms of their working principles. This mini review highlights the uses of OTFTs for a broad range of research applications with a focus on designing novel OTFTs-based biosensors.

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Section: The Structure and Operational Mechanism Of Otftsmentioning

confidence: 99%

Section: The Structure and Operational Mechanism Of Otftsmentioning

confidence: 99%

Organic thin film transistors‐based biosensors

Sun

Wang

Auwalu

et al. 2021

EcoMat

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“…In recent years, there has been an exponential surge in air pollution due to the extensive establishment of chemical-intensive pharmaceutical and oil-based industries. [1,2] Toxic emissions are one of the grave concerns since it has taken a heavy toll on human well-being and the environment. [3,4] For instance, hydrogen sulfide (H 2 S) is a well-known hazardous gas that inhibits chemical asphyxiation behavior.…”

Section: Introductionmentioning

confidence: 99%

Tris(Keto‐Hydrazone): A Fully Integrated Highly Stable and Exceptionally Sensitive H₂S Capacitive Sensor

Yuvaraja

Bhyranalyar

Bhat

et al. 2021

Adv Elect Materials

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Catalytic gas sensor technology, invented in 1926, is recorded to be the first modern age gas detection system that possesses significant advantages, including affordable, insensitive to humidity, and appreciable reproducibility. [10][11][12] Alongside, the system has certain drawbacks like poor sensing performance and the employed solid-state catalyst are highly poisonous that has the potential to cause severe health concerns when it comes in contact with the users. [10,13] This was followed by electrochemical gas sensors that are commercially available to sense a wide range of gases. [14,10,15,16] This technology has gained increased attention in a short period due to easy tunability of diffusion barriers on the surface of the porous membrane, [17] but poor chemical stability drastically declines its long-term durability. [18] Similarly, metal oxide semiconductor (MOS) sensors achieve high sensing performance only when operated at elevated temperatures that, in turn, requires more operating power. [19][20][21] Given this, it is vital to develop room-temperature operating, low cost, and compact gas sensors with excellent sensing performance and ambient stability. [22,23] Porous organic materials have been used in multiple applications to date. [22,24] One of the porous and multifaceted functional groups in chemistry are hydrazones; these systems can be found in various chemical structures that are being used for a plethora of different technological applications. The diverse behavior of hydrazone arises due to the presence of azomethine (CNN) group, which makes it useful in various fields. [25] A close study of hydrazone structure has revealed that the hydrazone functional group possesses some of the unusual properties such as an exhibition of both electrophilic as well as nucleophilic behavior, the existence of acidic proton on the nitrogen, conformational isomerism at CN bond, etc. [26,27] One crucial member of this hydrazone family is tris(ketohydrazone), a tautomeric structure, first realized by Lee et al., [28] in the early 2000s. These systems, due to their dynamic architecture, are uniquely placed in the hydrazone family. Literature studies have revealed that these systems are capable of undergoing keto-hydrazone tautomerism readily. Due to the presence of their extensive cage-like structures coupled with the electronic properties such as acidity, nucleophilicity, etc. they are highly sought after candidates for different sensing applications. [29,30]

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“…π-Conjugated polymers (CPs) have seen rapid development since their discovery in the 1970s, and within the past decade of research, key insights have brought them to the cusp of commercial implementation. , Flexible and stretchable field-effect devices, sensors, and thermoelectric devices that are based on these materials have seen significant improvement, and lab-scale CP-based solar cells have demonstrated power conversion efficiencies beyond 14%. − Despite these landmarks, there are still problems that need to be addressed before reproducible, efficient, and effective products can be fully realized.…”

Section: Introductionmentioning

confidence: 99%

Defect Tolerance of π-Conjugated Polymer Crystal Lattices and Their Relevance to Optoelectronic Applications

Tatum¹,

Resing²,

Flagg³

et al. 2019

ACS Appl. Polym. Mater.

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This work seeks to understand the role of structural defects in the polymer chain on the crystallization and crystal lattice of π-conjugated polymers, which is crucial for being able to predict morphology and performance of πconjugated polymer active layers in optoelectronic devices. Such a predictive understanding of device performance has been difficult to establish; however, in this work self-assembled nanowires of poly(3-hexylthiophene) (P3HT) are used to reduce analytical contributions from amorphous domains, allowing a more direct path to probe the effect of regio-defects and chain end-groups on the crystal lattice. By use of P3HT synthesized to have precisely varied defect concentrations, it was demonstrated that these defects can be incorporated into the crystal lattice, particularly regio-defects. However, this incorporation comes with a decrease in electronic properties as a result of diminished short-range order and lattice distortions. Bulky end-groups can be incorporated into the lattice, although there is a preference for their exclusion. However, the use of π−π interacting end-groups, such as toluene, is shown to mitigate disruption to the crystal lattice that results from the endgroup incorporation. In fact, π−π interacting end-groups seem to promote long-range order and crystal growth. Additionally, it was found that tuning the molecular weight of the polymer to an integer multiple of the observed width of the crystal lamellae, l c , can increase the enthalpy of fusion, ΔH f , for the crystal by as much as 20% by facilitating the exclusion of end-groups from the crystal lattice. These results demonstrate that π-conjugated polymer crystal lattices have a high tolerance for disruptions to short-range order so that long-range order can be preserved. In addition, this study underscores the need to consider structural defects in polymer chains and their consequences on the crystal lattice during the design and implementation of π-conjugated polymers.

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Assembly of π‐Conjugated Nanosystems for Electronic Sensing Devices

Cited by 11 publications

References 103 publications

Organic thin film transistors‐based biosensors

Organic thin film transistors‐based biosensors

Tris(Keto‐Hydrazone): A Fully Integrated Highly Stable and Exceptionally Sensitive H₂S Capacitive Sensor

Defect Tolerance of π-Conjugated Polymer Crystal Lattices and Their Relevance to Optoelectronic Applications

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Assembly of π‐Conjugated Nanosystems for Electronic Sensing Devices

Cited by 11 publications

References 103 publications

Organic thin film transistors‐based biosensors

Organic thin film transistors‐based biosensors

Tris(Keto‐Hydrazone): A Fully Integrated Highly Stable and Exceptionally Sensitive H2S Capacitive Sensor

Defect Tolerance of π-Conjugated Polymer Crystal Lattices and Their Relevance to Optoelectronic Applications

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Tris(Keto‐Hydrazone): A Fully Integrated Highly Stable and Exceptionally Sensitive H₂S Capacitive Sensor