Impedance characteristics of carbon nitride films for humidity sensors

Lee, Ji Gong; Lee, Sung Pil

doi:10.1016/j.snb.2005.12.049

Cited by 19 publications

(9 citation statements)

References 14 publications

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“…Using the same method, Lee et al developed a humidity sensor in which carbon nitride films were deposited on a silicon substrate. [239] The surface of the carbon nitride films possesses desirable uniformity with a grain size of approximately 30 nm. The impedance of the sample decreased from 118 k to 4 k over the relative humidity range of 5-95%.…”

Section: Humidity-sensing Applicationsmentioning

confidence: 99%

Host–Guest Recognition on 2D Graphitic Carbon Nitride for Nanosensing

Wang

Zhang

et al. 2019

Adv Materials Inter

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In recent years, graphitic carbon nitride (g-C 3 N 4) has attracted much attention due to its unique properties and excellent performance in the field of sensors, which has inspired the authors to compile this review. Although there are many reviews on the synthesis and applications of g-C 3 N 4 materials, a targeted, systematic, comprehensive summary of applications in sensors and the sensing mechanisms of g-C 3 N 4-based nanomaterials have not been published. In this review, the preparation methods and synthetic conditions for preparing g-C 3 N 4 with different morphologies, such as conventional bulk g-C 3 N 4 , g-C 3 N 4 nanosheets, and g-C 3 N 4 quantum dots, are introduced in detail. By reviewing recent advances in g-C 3 N 4-based nanomaterials in ion sensors, biosensors, gas sensors and humidity sensors, this study provides more comprehensive and in-depth information for the further design of g-C 3 N 4based sensors with enhanced performance. A brief outlook of g-C 3 N 4-based sensors is presented as the conclusion of this review.

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Section: Humidity-sensing Applicationsmentioning

confidence: 99%

Host–Guest Recognition on 2D Graphitic Carbon Nitride for Nanosensing

Wang

Zhang

et al. 2019

Adv Materials Inter

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“…Since the adsorption of H 2 O into layers of g‐CN alters the effective mass and induces tensile or compressive stresses, microelectromechanical humidity nanosensors have been developed . Protons are known to be the dominant carriers responsible for the electrical conductivity of g‐CN nanostructures . Because the electrical conductivity of g‐CN nanostructures is enhanced by H 2 O adsorption via an increase in the concentration of protons on the surfaces of the g‐CN nanostructures, capacitance/impedance‐based humidity nanosensors have been developed .…”

Section: Using G‐cn Nanostructures and Nanocomposites To Construct Chmentioning

confidence: 99%

“…Protons are known to be the dominant carriers responsible for the electrical conductivity of g‐CN nanostructures . Because the electrical conductivity of g‐CN nanostructures is enhanced by H 2 O adsorption via an increase in the concentration of protons on the surfaces of the g‐CN nanostructures, capacitance/impedance‐based humidity nanosensors have been developed . Humidity nanosensors based on both mechanisms have fast response times over a wide humidity range, good long‐term stabilities, and low costs.…”

Section: Using G‐cn Nanostructures and Nanocomposites To Construct Chmentioning

confidence: 99%

Tailored Graphitic Carbon Nitride Nanostructures: Synthesis, Modification, and Sensing Applications

Chen

Song

2017

Adv Funct Materials

164

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donating-driven property (e.g., catalysis and strong affinity to Lewis acid). These unique properties motivated huge activity in sensing applications of g-CN, indicating by the growing collection of publications concerning g-CN-based sensors, as displayed in Figure 3.This article reviews state-of-the-art sensing applications of nanostructured g-CN. We begin with a highlight of the diverse micro/nanostructures and nanocomposites of g-CN that are suitable for sensing applications and summarize the known signaling modes and sensing mechanisms. This is followed by a highlight of several interesting sensing examples. Finally, we also discuss new frontiers in the use of g-CN for sensing applications and identify existing challenges.

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“…Wu et al , 2005 [ 10 ], S. Chakraborty et al , 2006 [ 11 ]), humidity sensor (J. Wang et al , 2009 [ 12 ] and J.G. Lee et al 2006 [ 13 ]), organic solvent vapor sensors (F. Josse et al , 1996 [ 14 ]), engine oil/lubricant sensor (S.S. Wang et al 1997 [ 15 ] and 2001 [ 16 ], B. Jakoby et al 2004 [ 17 ], and V.F. Lvovich et al 2006 [ 18 ]), and corrosion monitoring sensor (I. Shitanda et al 2009 [ 19 ] and S. Li et al 2007 [ 20 ]).…”

Section: Introductionmentioning

confidence: 99%

Microfabricated Thin Film Impedance Sensor & AC Impedance Measurements

Liu

2010

Sensors

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Thin film microfabrication technique was employed to fabricate a platinum based parallel-electrode structured impedance sensor. Electrochemical impedance spectroscopy (EIS) and equivalent circuit analysis of the small amplitude (±5 mV) AC impedance measurements (frequency range: 1 MHz to 0.1 Hz) at ambient temperature were carried out. Testing media include 0.001 M, 0.01 M, 0.1 M NaCl and KCl solutions, and alumina (∼3 μm) and sand (∼300 μm) particulate layers saturated with NaCl solutions with the thicknesses ranging from 0.6 mm to 8 mm in a testing cell, and the results were used to assess the effect of the thickness of the particulate layer on the conductivity of the testing solution. The calculated resistances were approximately around 20 MΩ, 4 MΩ, and 0.5 MΩ for 0.001 M, 0.01 M, and 0.1 M NaCl solutions, respectively. The presence of the sand particulates increased the impedance dramatically (6 times and 3 times for 0.001 M and 0.1 M NaCl solutions, respectively). A cell constant methodology was also developed to assess the measurement of the bulk conductivity of the electrolyte solution. The cell constant ranged from 1.2 to 0.8 and it decreased with the increase of the solution thickness.

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Impedance characteristics of carbon nitride films for humidity sensors

Cited by 19 publications

References 14 publications

Host–Guest Recognition on 2D Graphitic Carbon Nitride for Nanosensing

Host–Guest Recognition on 2D Graphitic Carbon Nitride for Nanosensing

Tailored Graphitic Carbon Nitride Nanostructures: Synthesis, Modification, and Sensing Applications

Microfabricated Thin Film Impedance Sensor & AC Impedance Measurements

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