Low cost, flexible and biodegradable touch sensor fabricated by solvent-free processing of graphite on cellulose paper

Kanaparthi, Srinivasulu; Badhulika, Sushmee

doi:10.1016/j.snb.2016.09.172

Cited by 81 publications

(55 citation statements)

References 26 publications

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“…The increasing demand for green exible electronic devices, portable microelectronic products, and wearable devices, as well as environmentally-friendly new energy products, has triggered in-depth studies on low-cost exible electrode materials with high capacity, high speed, long life, high stability, and good biodegradability/biocompatibility. [1][2][3][4][5] Supercapacitors are the most promising solution to the abovementioned requirements and hence have become a hot topic of research. [6][7][8][9][10] A possible strategy to achieve high specic capacitance, high operating potential, and long-term cycle stability of supercapacitors involves hybridizing a double layer capacitance (EDLC) carbon material with a pseudocapacitance conductive polymer material; this method allows for efficient charge transfer and accelerates the reaction kinetics.…”

Section: Introductionmentioning

confidence: 99%

Nanocellulose supported hierarchical structured polyaniline/nanocarbon nanocomposite electrode via layer-by-layer assembly for green flexible supercapacitors

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Nanocellulose supported hierarchical structured polyaniline/nanocarbon nanocomposite electrode via layer-by-layer assembly for green flexible supercapacitors

et al. 2019

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“…e 0 , e 1 , and e 2 are permittivities of free space, air medium and paper respectively, h is the hight of the electrodes, n is the number of electrode fingers, l is the length of electrode fingers, w is the width of electrode fingers and d is the gap between electrode fingers and [12]. From equation (1), it can be deduced that the capacitance of the sensor can be varied with humidity as the dielectric constant of paper is humidity sensitive.…”

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confidence: 99%

Pencil‐drawn Paper‐based Non‐invasive and Wearable Capacitive Respiration Sensor

Kanaparthi

2017

Electroanalysis

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This paper describes a fully‐drawn pencil‐on‐paper based low‐cost capacitive sensor for non‐invasive respiration monitoring. The sensor utilizes the hygroscopic character of the paper to measure the breathing rate and pattern. The adsorption and desorption of water molecules on paper during inhalation and exhalation results in variation in its dielectric constant. This change in dielectric constant during respiration reflects the change in capacitance of the sensor. By interfacing the sensor with the microcontroller, the capacitance data was acquired and transferred to a smartphone through Bluetooth communication. Being a low cost, wearable, non‐invasive and disposable sensor, it holds tremendous potential in healthcare technology and can be commercialized into a viable product for easy‐to‐use diagnostic purpose.

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“…For example, piezoelectric nanomaterials have larger piezoelectric coefficients than bulk materials due to size effect, enhancing the voltage and current generated by pressure 78,159–162. Graphene‐based 2D nanomaterials also improve the mechanical stability of sensors 4,163–166. In addition, when metal nanowires and nanoparticles are combined with flexible polymers, a network of metal nanomaterials is formed in the polymers, which improves both flexibility and conductivity 3,79,167–169.…”

Section: High‐performance Sensors Using Geometrically Structured Nanomentioning

confidence: 99%

Geometrically Structured Nanomaterials for Nanosensors, NEMS, and Nanosieves

Seo

Yoo

et al. 2020

Advanced Materials

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Recently, geometrically structured nanomaterials have received great attention due to their unique physical and chemical properties, which originate from the geometric variation in such materials. Indeed, the use of various geometrically structured nanomaterials has been actively reported in enhanced‐performance devices in a wide range of applications. Recent significant progress in the development of geometrically structured nanomaterials and associated devices is summarized. First, a brief introduction of advanced nanofabrication methods that enable the fabrication of various geometrically structured nanomaterials is given, and then the performance enhancements achieved in devices utilizing these nanomaterials, namely, i) physical and gas nanosensors, ii) nanoelectromechanical devices, and iii) nanosieves are described. For the device applications, a systematic summary of their structures, working mechanisms, fabrication methods, and output performance is provided. Particular focus is given to how device performance can be enhanced through the geometric structures of the nanomaterials. Finally, perspectives on the development of novel nanomaterial structures and associated devices are presented.

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Low cost, flexible and biodegradable touch sensor fabricated by solvent-free processing of graphite on cellulose paper

Cited by 81 publications

References 26 publications

Nanocellulose supported hierarchical structured polyaniline/nanocarbon nanocomposite electrode via layer-by-layer assembly for green flexible supercapacitors

Nanocellulose supported hierarchical structured polyaniline/nanocarbon nanocomposite electrode via layer-by-layer assembly for green flexible supercapacitors

Pencil‐drawn Paper‐based Non‐invasive and Wearable Capacitive Respiration Sensor

Geometrically Structured Nanomaterials for Nanosensors, NEMS, and Nanosieves

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