Preparation of wearable strain sensor based on PVA/MWCNTs hydrogel composite

Dong, Xiaoxv; Song, Tao; Ren, Dongdong; Dai, Kun; Leng, Yuting; Wang, Tiantian; Wang, Yanxin; Sun, Manman; Liu, Donghang; Zhang, Qingtao; Zhang, Jin; Li, Qian; Wang, Shiwei

doi:10.1016/j.mtcomm.2022.103278

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…Polymerization occurred during the freezing cycle. Ice formed in the amorphous region connected to the polymer chains and formed cross-links via hydrogen bonds on other polymer chains as well as on hydroxyl and carboxyl groups of the functionalized MWCNT nanofillers . Thereafter, the sublimation of water crystals during the thawing process resulted in the formation of a 3D network without the use of cross-linking agents .…”

Section: Resultsmentioning

confidence: 99%

“…Ice formed in the amorphous region connected to the polymer chains and formed cross-links via hydrogen bonds on other polymer chains as well as on hydroxyl and carboxyl groups of the functionalized MWCNT nanofillers. 59 Thereafter, the sublimation of water crystals during the thawing process resulted in the formation of a 3D network without the use of cross-linking agents. 60 Moreover, a Raman analysis was performed to characterize the carbon-based electrode by observing the peaks assigned to tangential vibration modes at an excitation wavelength of 785 nm.…”

Section: Optimization Of the Screen-printed Carbonmentioning

confidence: 99%

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MWCNTs/PVA Hydrogel-Modified Electrochemical Sensors for Ex Vivo and In Vivo Detection of Pyocyanin Biomarker for Pseudomonas aeruginosa Wound Infection

Thirabowonkitphithan

Phuengmaung

Leelahavanichkul

et al. 2023

ACS Appl. Electron. Mater.

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Pseudomonas aeruginosa is the most prevalent cause of diabetic wound infection and amputation. Pyocyanin is one of the popular markers to identify Pseudomonas infections. However, no existing sensors are on the verge of being used as a suitable sensor for detecting pyocyanin in real-world applications. This study employed a physically cross-linked approach to decorate the surface of a working electrode with a multiwalled carbon nanotube (MWCNTs/PVA) nanocomposite, which increases electron transport, sample absorption, and biocompatibility. Under optimal conditions, the electrochemical behavior of a pyocyanin sensor was investigated using cyclic voltammetry and square wave voltammetry. The developed pyocyanin sensor demonstrated an excellent analytical range covering a clinically relevant range of 1–100 μM pyocyanin in various sample matrices including phosphate buffer, Lysogeny broth, simulated wound exudate, and Mueller–Hinton broth, showing a detection limit of 0.48, 0.10, 1.63, and 0.39 μM, respectively, with R 2 > 0.99. The sensor’s potential wearability and point-of-care capability were demonstrated by detecting pyocyanin in wounds on ex vivo porcine skin and an in vivo animal model with excellent biocompatible property, achieving cell viability of L-929 > 80%. The detection could be performed directly in various sample matrices without any preparation processes. The sensor demonstrated high selectivity and sensitivity in the presence of common wound interferences. As a result, the proposed method has the potential to be a promising sensor for the early detection of P. aeruginosa infection in wounds in the perspective of wound care technology in the future.

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Section: Resultsmentioning

confidence: 99%

Section: Optimization Of the Screen-printed Carbonmentioning

confidence: 99%

MWCNTs/PVA Hydrogel-Modified Electrochemical Sensors for Ex Vivo and In Vivo Detection of Pyocyanin Biomarker for Pseudomonas aeruginosa Wound Infection

Thirabowonkitphithan

Phuengmaung

Leelahavanichkul

et al. 2023

ACS Appl. Electron. Mater.

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show abstract

“…, hydrogen bonds) with hydrogels. 35,36 Based on the nano-enhancement effect and conductivity of MXenes, the mechanical properties and conductivity of the hydrogel will be further improved. 37–39…”

Section: Introductionmentioning

confidence: 99%