An ultra-sensitive and stable electrochemical sensor with an expanded working range <i>via in situ</i> assembly of 3-D structures based on MXene/GnR nanohybrids

Taromsari, Sara Mohseni; Shi, Haotian Harvey; Habibpour, Saeed; Kiddell, Sophie; Yu, Aiping; Park, Chul; Naguib, Hani E.

doi:10.1039/d2ta07071e

Cited by 7 publications

(2 citation statements)

References 76 publications

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“…For instance, the intercalation of water molecules can introduce additional electron-donating groups, thereby modulating the charge carrier concentration and band structure. 32 Organic molecule intercalation can tailor the electronic properties of MXenes by altering the local chemical environment and introducing functional groups with specific electronic characteristics. 33 These modifications enable fine-tuning of the electronic properties of MXenes to enhance their capabilities, such as facilitating charge transfer at the MXene interface.…”

Section: Mxene Structuresmentioning

confidence: 99%

“…The intercalated species within MXene layers also influence the electronic properties of MXenes. For instance, the intercalation of water molecules can introduce additional electron-donating groups, thereby modulating the charge carrier concentration and band structure . Organic molecule intercalation can tailor the electronic properties of MXenes by altering the local chemical environment and introducing functional groups with specific electronic characteristics .…”

Section: Mxene Structuresmentioning

confidence: 99%

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Thermally Conductive MXene

Safarkhani,

Far,

Huh

et al. 2023

ACS Biomater. Sci. Eng.

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Section: Mxene Structuresmentioning

confidence: 99%

Section: Mxene Structuresmentioning

confidence: 99%

Thermally Conductive MXene

Safarkhani,

Far,

Huh

et al. 2023

ACS Biomater. Sci. Eng.

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The Intersection of Computational Design and Wearable‐Optimized Electrospun Structural Nanohybrids for Electromagnetic Absorption

Salari,

Taromsari,

Habibpour

et al. 2023

Adv Funct Materials

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By leveraging the principles of electromagnetic theory and materials science, the characteristics of dielectric polymer composites can be optimized, eliminating repetitive trial‐and‐error in their application as electromagnetic absorbers (EMAs). Herein, a systematic framework for optimizing the thickness and composition of double‐layer EMAs is proposed, using a combination of transmission line, Debye relaxation, and Maxwell–Garnett theories. Following theoretical optimization, a double‐layered electrospun EMA is fabricated, which comprises a ≈1.17 mm thick matrix of styrene–butadiene–styrene (SBS) decorated with MXene on its fibrous structure. The second SBS layer, with a thickness of ≈0.52 mm, incorporates a hybrid of MXene and graphene nanoribbons (GNR) as conductive additives. The EMA exhibits durable electrical performance after 2000 tensile cycles, owing to the surface chemistry engineering and the novel in situ assembly technique. It is capable of shielding 99.9% of the incident wave and >80% absorptivity (A) over almost the entire Ku‐band. The EMA also exhibits desirable mechanical characteristics, such as >300% stretchability and full twist and wrinkle recoveries, making it an excellent choice for protective attire applications. Additionally, the introduced approach provides solutions for the advancement of tailorable polymer composite EMAs, with respect to specific criteria of the target wave frequency, effective absorption bandwidth, and absorption levels.

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PEDOT:PSS‐Facilitated Directionally 3‐D Assembled MXene‐Based Aerogel for High‐Performance Chemoresistive Sensing & Breath Analysis

Mohseni Taromsari,

Salari,

Shi

et al. 2024

Advanced Materials

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MXene has garnered growing interest in the field of electrochemistry, thanks to its unique electrical and surface characteristics. Nonetheless, significant challenges persist in realizing its full potential in chemoresistive sensing applications. In this study, a novel unidirectional freeze‐casting approach for fabricating a Poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)‐facilitated vertically aligned MXene‐based aerogel with enhanced chemoresistive sensing properties was introduced. Firstly, the persistent challenge of poor gelation in MXene was addressed by formulating a nanohybrid of MXene and PEDOT:PSS, which acted as flexible conductive nanobinder. Employing a unique freeze‐casting method, MXene flakes interconnected by PEDOT:PSS, were stabilized into a flexible, vertically aligned structure, leading to maximum surface exposure and enhanced robustness. The resulting 3‐dimentional (3‐D) aerogel exhibited a fast, heightened chemoresistive response of 7 to 50 parts per million (ppm) acetone and expanded the working range to between 10 parts per billion (ppb)‐8000 ppm. Interfacial heterostructures formed between MXene and PEDOT:PSS, provided active sites, reduced activation energy, and enhanced selectivity. Modulated MXene bandgap, and its electron mobility further facilitated electron transfer, and enhanced signal strength. The sensor showed excellent biocompatibility and was also successfully employed as a breathalyzing tool, for on‐demand alcohol consumption monitoring.

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An ultra-sensitive and stable electrochemical sensor with an expanded working range via in situ assembly of 3-D structures based on MXene/GnR nanohybrids

Abstract: In this study, a multidisciplinary approach was taken to develop an ultrasensitive, mechanically strong, and environmentally stable volatile analytes sensor that can be incorporated into portable devices to provide on-demand...

Cited by 7 publications

References 76 publications

Thermally Conductive MXene

Thermally Conductive MXene

The Intersection of Computational Design and Wearable‐Optimized Electrospun Structural Nanohybrids for Electromagnetic Absorption

PEDOT:PSS‐Facilitated Directionally 3‐D Assembled MXene‐Based Aerogel for High‐Performance Chemoresistive Sensing & Breath Analysis

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