Carbon-based nanomaterials

Pillai, Premlal Balakrishna; Souza, M.M. De

doi:10.1016/b978-1-78242-228-0.00008-9

Modeling, Characterization, and Production of Nanomaterials 2015

DOI: 10.1016/b978-1-78242-228-0.00008-9

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Carbon-based nanomaterials

Premlal Balakrishna Pillai

M.M. De Souza

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Cited by 2 publications

References 72 publications

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Ultra‐Flexible Biodegradable Pressure Sensitive Field Effect Transistors for Hands‐Free Control of Robot Movements

Paul

Yogeswaran

Dahiya

2022

Advanced Intelligent Systems

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Sensitive flexible pressure sensors are needed in applications such as health monitoring, robotics, and wearable systems. Herein, crumpled graphene flakes network (c‐GFN) channel based highly sensitive pressure sensing field effect transistors (PRESSFETs) are presented. The solution‐processed PRESSFET devices are developed on ultrathin (≈3 μm thick) biodegradable graphene oxide–chitosan (GO–CS) substrate. The distinctive crumpled morphology of GFN leads to a bandgap of 800 meV, which allows the device to have clear ON and OFF electronic states and low subthreshold swing. The presented device can work over a dynamic pressure range (0.5–2 kPa), while exhibiting good electrical stability and repeatability during rapid switching. The application of the presented device is demonstrated by attaching them to the temple regions of the face and pressing them with flexure and relaxation of respective temporalis muscles for hands‐free control of the movements of a robotic device. The pressure sensing device turns ON when the facial temporalis muscle is flexed and returns to the OFF state when it is relaxed. Finally, the degradability of the devices is presented to demonstrate their easy disposability and potential for zero electronic waste.

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Ultra‐Flexible Biodegradable Pressure Sensitive Field Effect Transistors for Hands‐Free Control of Robot Movements

Paul

Yogeswaran

Dahiya

2022

Advanced Intelligent Systems

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Electrochemically Reduced Graphene Oxide as Screen‐printed Electrode Modifier for Fenamiphos Determination

et al. 2020

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In this study, electrochemically reduced graphene oxide (ERGO) was used for the preparation of a screen‐printed modified electrode and applied for the voltammetric determination of fenamiphos (FNP) in tomato samples. Graphene oxide (GO) used for sensor construction was prepared according to an improved Hummers method and characterized by XRD, TEM, and FTIR, which confirmed the nanomaterial obtention. The ERGO formation was carried out from the electrodeposition by cyclic voltammetry, at 50 mV s−1 in the potential range of 0.0 to −1.5 V, during 50 cycles. ERGO‐SPE was used in the evaluation of the voltammetric behavior of FNP. The ERGO‐SPE proposed presented excellent electrochemical performance towards FNP oxidation, promoting an enhance on the anodic peak current and a decrease of peak potential. Under optimized conditions, it was possible to construct an analytical curve, using square wave voltammetry, with a linear region of 0.25 to 25.0 μM, with calculated limits of detection and quantification of 0.067 and 0.22 μM. From this, it was possible to analyze FNP in fortified tomato samples at three concentration levels, which showed recoveries values varying between 82 and 102 %. The ERGO‐SPE device proved useful in determining FNP, where the effect of the electrodeposition of the GO promoted a significant increase in the employability of the printed electrode.

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Carbon-based nanomaterials

Cited by 2 publications

References 72 publications

Ultra‐Flexible Biodegradable Pressure Sensitive Field Effect Transistors for Hands‐Free Control of Robot Movements

Ultra‐Flexible Biodegradable Pressure Sensitive Field Effect Transistors for Hands‐Free Control of Robot Movements

Electrochemically Reduced Graphene Oxide as Screen‐printed Electrode Modifier for Fenamiphos Determination

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