Pencil-on-Paper Capacitors for Hand-Drawn RC Circuits and Capacitive Sensing

Thompson, John E.

doi:10.1155/2017/4909327

Cited by 8 publications

(1 citation statement)

References 17 publications

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“…The uses of pencil-on-paper based sensors has been increasing been used in various types of applications such as detecting chemicals [1,2], tactile sensor [3], strain measurement [4,5], and as a capacitor [6]. It gives advantages in terms of light weight, flexible, portable, easy to dispose and environment-friendly.…”

Section: Introductionmentioning

confidence: 99%

Development and Application of a Pencil-on-Paper Strain Sensor for Pressure Measurement

2017

IJSR

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The development and application of a strain sensor using pencil-on-paper is presented in this paper. The use of pencil which contains of graphite create a simple sensing technique that can be used to measure the pressure force. When the pressure force is applied, the beam will deflect and give a change in resistance. A comparison was made using two different types of pencil 2B and 4B. 2B pencil was chosen due to the high sensitivity compared to 4B pencil. Sensitivity of the sensor is obtained 0.65 MΩ/cm based on the deflection and output resistance. For the application, this sensor has been attached to the latex membrane and observation was made for the pressure measurement based on the applied pressure and different surface area.

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Section: Introductionmentioning

confidence: 99%

Development and Application of a Pencil-on-Paper Strain Sensor for Pressure Measurement

2017

IJSR

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Textile Electronics for VR/AR Applications

Liu

Bao

et al. 2020

Adv Funct Materials

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Textile electronics addresses fibers or fiber assemblies with electronic functions to generate, transmit, modulate, and detect electrons. Interactive textile electronic devices may provide suitable platforms for virtual reality (VR)/augmented reality (AR) applications because of their excellent performance and unique immersive features such as lightweight, handiness, flexibility, comfort, and low strain even under high deformations. This paper presents a systematic review of the literature on the state‐of‐the‐art of interactive devices, fabrication technologies, system integration, promising applications, and challenges involved in textile‐based VR/AR systems.

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Hand‐Drawn Resistors, Capacitors, Diodes, and Circuits for a Pressure Sensor System on Paper

Costa

Wishahi

Pouryazdan

et al. 2018

Adv Elect Materials

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containing silver, [11] metallic nanowires, [12] indium-gallium alloys, [13] or carbon nanotubes. [14] In addition, inks containing semiconductors such as zinc oxide [15] or poly-3-octylthiophene [16] have been developed. These materials have been used for the development of electrocardiogram sensors, [17] antennas, [18] displays, [19] and transistors. [20][21][22] Nevertheless, the complex synthesis required to produce such inks limits their widespread use. Graphite, on the other hand, is an abundant and cheap material, and lead pencils have been used to write on paper since the 16th century. [23] More importantly, due to the bulk structure of graphite, which consists of disorganized clusters of stacked graphene sheets connected by Van der Wall bonds, graphite is an electrically conductive material. Hence, commercially available pencils can be used to fabricate pencil-written electronic components, circuits, and sensors. [24][25][26][27][28] In this work, the complexity and functionality of hand-written electronics is moved to a new level through the development of a complete pressure sensor system which also features the first hand-written Schottky diode on paper. The presented system is based on a pen and pencil-written half-wave rectifier, as well as a low-pass filter and percolation force-sensitive resistor. It also includes an off-the-shelf operational amplifier biased using hand-written passive components. The amplifier acts as a sensor conditioning circuit and improves the signal-to-noise ratio of the device. The realization of the system relied on a detailed characterization of the discrete components to evaluate and define the fabrication parameters.Pencils containing different graphite-to-clay ratios allow for the fabrication of thin-film resistors with varied sheet resistances. Changing resistance values is easily achieved by either removing or adding graphite layers to or from the existing structures, making the prototyping process faster. Graphitepaper-graphite parallel plate capacitors demonstrate capacitance values as high as 141 pF cm −2 ; this is three times larger than similar existing paper capacitors. [29] Larger capacitances can only be reached utilizing high-k solutions such as sulfuric acid. [30] Hand-written Schottky diodes on paper exhibiting rectification ratios of 1:8 were also fabricated and studied. All handwritten devices are used to realize circuits including rectifiers and filters for frequencies up to 13.56 MHz. Finally, all presented devices and circuits were tested under tensile and compressive stress. Bending radii down to 100 µm (corresponding -written fabrication techniques offer new ways of developing customizable, biodegradable, and low-cost electronic systems. In this work, a new level of complexity is demonstrated for hand-written electronics by fabricating passive components, circuits, and a sensor system on paper. The system comprises a pencil-written graphite force-sensitive resistor, a pencil-drawn RC filter, a pen-written half-wave rectifier, and a commercial front...

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Pencil-on-Paper Capacitors for Hand-Drawn RC Circuits and Capacitive Sensing

Cited by 8 publications

References 17 publications

Development and Application of a Pencil-on-Paper Strain Sensor for Pressure Measurement

Development and Application of a Pencil-on-Paper Strain Sensor for Pressure Measurement

Textile Electronics for VR/AR Applications

Hand‐Drawn Resistors, Capacitors, Diodes, and Circuits for a Pressure Sensor System on Paper

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