Zwitterionic sulfobetaine-containing polyelectrolyte for controlling humidity-sensitivity

Han, Dae-Sang; Gong, Myoung‐Seon

doi:10.1016/j.snb.2009.12.008

Cited by 14 publications

(4 citation statements)

References 32 publications

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“…4,5,[9][10][11][12][13][14] The thickness of the polyelectrolyte closely affects the humidity sensitivities, such as hysteresis and response or recovery time. 15,16 In addition, IDEs-type humidity sensors exhibited a significant change in impedance with a change in the number of fingers and gap size between electrode fingers, which are related to the design of the electrode.…”

Section: -29mentioning

confidence: 99%

AC Complex Impedance Study on the Resistive Humidity Sensors with Ammonium Salt-Containing Polyelectrolyte using a Different Electrode Pattern

Cha¹,

Gong²

2013

Bulletin of the Korean Chemical Society

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We examined the effect of electrode fingers and gaps of coplanar interdigitated electrode (IDE) structures to characterize the ammonium salt-containing polyelectrolyte film of resistance-based humidity sensors. IDEs designed for this purpose were flexible gold electrodes deposited on a polyimide substrate using a printing process because the geometry presents a potential for tunable sensitivity over other electrode designs. The basic design of the sensors consisted of IDEs with a different number of electrode fingers such as 3, 4, and 5 and gap sizes of 310, 360, 410, and 460 µm. Details of the AC complex impedance characteristics such as the Nyquist plot, Bode plot, and activation energy based on electrode construction were investigated.

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Section: -29mentioning

confidence: 99%

AC Complex Impedance Study on the Resistive Humidity Sensors with Ammonium Salt-Containing Polyelectrolyte using a Different Electrode Pattern

Cha¹,

Gong²

2013

Bulletin of the Korean Chemical Society

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“…13 Among them, conjugated polymers have attracted increasing attention due to their structural diversity, tunability, controllable performance and low cost. 14 However, many conjugated polymers suffer from long-time instability and low sensitivity to humidity. 15 Recently, ion-in-conjugation polymers, containing ionic states in the conjugated backbones, were investigated because of their unparalleled physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Noninvasive and point-of-care screening of snoring by breath monitoring using ion-in-conjugation polymer-based humidity sensors

et al. 2023

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“…[1][2][3][4] However, resistive-type sensors offer good interchangeability and are generally cheaper to manufacture than capacitive-type sensors. 5,6 Because of its high molecular weight, polymeric humidity-sensitive polyelectrolyte is limited to the dip-coating and spin-coating method.…”

Section: Introductionmentioning

confidence: 99%

“…[21][22][23][24][25][26] Their ionic moieties, such as cationic, anionic, and amphoteric, and their counter ions were directly related to sensitivity. 2,7,[27][28][29][30][31][32][33][34] In addition, the thickness of the humid membrane closely affects the humidity sensitivities, such as hysteresis and response time or recovery time. 35,36 The sensing characteristics of these humidity sensors are also dependent on the electrode gap size, which is related to the design of the electrode.…”

Section: Introductionmentioning

confidence: 99%

Preparation of flexible resistive humidity sensors with different electrode gaps by screen printing and their humidity-sensing properties

Ahn

Kim

Gong³

2012

Macromol. Res.

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A novel, flexible resistive-type humidity sensor was fabricated through silk-screen printing of a humiditysensitive copolymer of [2-(methacryloyloxy)ethyl] dimethyl benzyl ammonium chloride and methyl methacrylate on a glass epoxy (GE) substrate. The basic structure of the sensor consisted of a 4-fingered interdigital electrode with various gaps (310, 360, 410, and 460 µm). Gold electrodes GE substrate were prepared by first printing silver nanopaste (thickness 6-7 µm), followed by consecutive electroless plating of Cu (5 µm), Ni (2 µm), and then Au (80 nm). The activation energy for ion conduction and the copolymer/substrate interface were used to explain the differences of humidity-sensing characteristics of sensors fabricated on a GE substrate. Electrode construction had a significant influence on the humidity-sensing characteristics of polymeric relative humidity sensors. Details regarding humidity sensor characteristics, including sensitivity, linearity, temperature dependence, hysteresis, and response time depending on electrode construction were compared. The flexible humidity sensor showed acceptable linearity between logarithmic impedance and relative humidity in the range of 20-95%RH, low hysteresis (within 1.5%RH), good response (75 s) and recovery time (95 s), and long-term stability (225 days at least), measured at 1 V, 1 kHz, and 25 o C.

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Zwitterionic sulfobetaine-containing polyelectrolyte for controlling humidity-sensitivity

Cited by 14 publications

References 32 publications

AC Complex Impedance Study on the Resistive Humidity Sensors with Ammonium Salt-Containing Polyelectrolyte using a Different Electrode Pattern

AC Complex Impedance Study on the Resistive Humidity Sensors with Ammonium Salt-Containing Polyelectrolyte using a Different Electrode Pattern

Noninvasive and point-of-care screening of snoring by breath monitoring using ion-in-conjugation polymer-based humidity sensors

Preparation of flexible resistive humidity sensors with different electrode gaps by screen printing and their humidity-sensing properties

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