Electrohydrodynamic jet printed conducting polymer for enhanced chemiresistive gas sensors

Mkhize, Nhlakanipho; Murugappan, Krishnan; Castell, Martin R.; Bhaskaran, Harish

doi:10.1039/d0tc05719c

Cited by 38 publications

(29 citation statements)

References 35 publications

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“…A thorough understanding of its application will open up more creative and interesting applications including displays, [ 148 ] transistors, [ 149 ] lithography, [ 21,150 ] nano electromechanical systems (NEMS)/micro electromechanical systems (MEMS) devices, [ 115 ] sensors, [ 79,151 ] surface functionalization, [ 129 ] wearable electronics, [ 152 ] and so forth. Further, due to its relative ease of operation and set‐up, EHD has the potential to be integrated into larger systems.…”

Section: Discussionmentioning

confidence: 99%

“…The addition of dilute acid or salt solutions to inks has been demonstrated to increase the ionic concentration and thus improve the conductivity. [ 47,77,79–81 ] The addition of acid however, can alter the physical nature of the solution, especially where polymers are involved. For instance, gelation/swelling of polyvinyl alcohol (which can be used as a surfactant) has been observed in the presence of hydrochloric acid.…”

Section: Ink Considerations For Ehd Printingmentioning

confidence: 99%

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Electrohydrodynamic Jet Printing: Introductory Concepts and Considerations

Mkhize

Bhaskaran

2021

Small Science

Self Cite

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Electrohydrodynamic (EHD) jet printing is an emerging technique in the field of additive manufacturing. Due to its versatility in the inks it can print, and most importantly, the printing resolution it can achieve, it is rapidly gaining favor for application in the manufacture of electronic devices, sensors, and displays among others. Although it is an affordable and accessible manufacturing process, it does require excellent operational understanding to achieve high resolution printing of up to 50 nm as reported in literature. In this review, three main aspects are considered, namely, the ink properties, the printer system itself (including design, nozzle dimensions, applied potential, and others), and the substrate onto which printing is being carried out. Knowing how all these factors can be manipulated and brought together allows the users of EHD printing to achieve extraordinary resolution and consistent results. The review is concluded with a brief discussion on where one can see the potential for development in this field of research.

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Section: Discussionmentioning

confidence: 99%

Section: Ink Considerations For Ehd Printingmentioning

confidence: 99%

Electrohydrodynamic Jet Printing: Introductory Concepts and Considerations

Mkhize

Bhaskaran

2021

Small Science

Self Cite

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“…Generally, the size of the area covered with the electrospun fibers decreases with the decreasing nozzle-to-substrate distance, which is accompanied by a reduction of the applied potential to preserve the electric field and prevent the onset of electrical discharges. The near-field electrospinning (NFES) method, also known as the electrohydrodynamic direct-writing (EDW) method, exploits this behavior [181][182][183][184][185][186]. The working principle of EDW is similar to that of the traditional electrospinning but with some distinctive features, namely the small nozzle diameter (<50 μm), the low applied voltage (<1 kV), the short distance between the nozzle and the substrate (0.5-5 mm), and the use of a moving nozzle and/or substrate, which facilitates position-tunable alignment and on-demand patterning of fibers on the substrate.…”

Section: Patterning Methodsmentioning

confidence: 99%

One-Dimensional Metal Oxide Nanostructures for Chemical Sensors

Hontañón¹,

Vallejos²

2022

21st Century Nanostructured Materials - Physics, Chemistry, Classification, and Emerging Applications in Industry, Biomedicine,

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The fabrication of chemical sensors based on one-dimensional (1D) metal oxide semiconductor (MOS) nanostructures with tailored geometries has rapidly advanced in the last two decades. Chemical sensitive 1D MOS nanostructures are usually configured as resistors whose conduction is altered by a charge-transfer process or as field-effect transistors (FET) whose properties are controlled by applying appropriate potentials to the gate. This chapter reviews the state-of-the-art research on chemical sensors based on 1D MOS nanostructures of the resistive and FET types. The chapter begins with a survey of the MOS and their 1D nanostructures with the greatest potential for use in the next generation of chemical sensors, which will be of very small size, low-power consumption, low-cost, and superior sensing performance compared to present chemical sensors on the market. There follows a description of the 1D MOS nanostructures, including composite and hybrid structures, and their synthesis techniques. And subsequently a presentation of the architectures of the current resistive and FET sensors, and the methods to integrate the 1D MOS nanostructures into them on a large scale and in a cost-effective manner. The chapter concludes with an outlook of the challenges facing the chemical sensors based on 1D MOS nanostructures if their massive use in sensor networks becomes a reality.

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“…The printing of these inks over polymer substrates gave rise to the fabrication of flexible gas sensors. 94 2.4. Light-Based 3D Printing.…”

Section: Main Additive Manufacturing and 3dmentioning

confidence: 99%

Additive Manufacturing of Conducting Polymers: Recent Advances, Challenges, and Opportunities

Criado‐Gonzalez

Dominguez‐Alfaro

Lopez‐Larrea

et al. 2021

ACS Appl. Polym. Mater.

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Conducting polymers (CPs) have been attracting great attention in the development of (bio)electronic devices. Most of the current devices are rigid two-dimensional systems and possess uncontrollable geometries and architectures that lead to poor mechanical properties presenting ion/electronic diffusion limitations. The goal of the article is to provide an overview about the additive manufacturing (AM) of conducting polymers, which is of paramount importance for the design of future wearable three-dimensional (3D) (bio)electronic devices. Among different 3D printing AM techniques, inkjet, extrusion, electrohydrodynamic, and light-based printing have been mainly used. This review article collects examples of 3D printing of conducting polymers such as poly(3,4-ethylene-dioxythiophene), polypyrrole, and polyaniline. It also shows examples of AM of these polymers combined with other polymers and/or conducting fillers such as carbon nanotubes, graphene, and silver nanowires. Afterward, the foremost applications of CPs processed by 3D printing techniques in the biomedical and energy fields, that is, wearable electronics, sensors, soft robotics for human motion, or health monitoring devices, among others, will be discussed.

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Electrohydrodynamic jet printed conducting polymer for enhanced chemiresistive gas sensors

Abstract: Electrohydrodynamic Jet Printing (EHD) enables the printing of sub-micron structures using a wide variety of materials and substrates, and thus comparing favorably to many current additive manufacturing techniques. By using...

Cited by 38 publications

References 35 publications

Electrohydrodynamic Jet Printing: Introductory Concepts and Considerations

Electrohydrodynamic Jet Printing: Introductory Concepts and Considerations

One-Dimensional Metal Oxide Nanostructures for Chemical Sensors

Additive Manufacturing of Conducting Polymers: Recent Advances, Challenges, and Opportunities

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