Highly sensitive strain sensors with wide operation range from strong MXene-composited polyvinyl alcohol/sodium carboxymethylcellulose double network hydrogel

Kong, Deshuo; El‐Bahy, Zeinhom M.; Algadi, Hassan; Li, Tuo; El‐Bahy, Salah M.; Nassan, Mohamed A.; Li, Jiongru; Faheim, Abeer A.; Li, Ang; Xu, Chunjing; Huang, Mina; Cui, Dapeng; Wei, Huige

doi:10.1007/s42114-022-00531-1

Cited by 151 publications

(68 citation statements)

References 71 publications

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“…171,172 The detection of gaseous components from industrial and manufacturing processes, 173,174 and use as biosensors for glucose, peroxidase and protein estimation [175][176][177][178] are some of the incredible applications of sensors. The materials constituting a sensor can include semiconductor metal oxides [179][180][181][182] and carbon-based materials 183,184 with functionality ranging from mechanical stimuli [185][186][187][188][189][190][191] to environmental monitoring. 192,193 The quantitative detection and sensing of gaseous pollutants is vital in the industrial and manufacturing arena to safeguard human health.…”

Section: Sensing Applications Of Hapmentioning

confidence: 99%

Hydroxyapatite coatings: a critical review on electrodeposition parametric variations influencing crystal facet orientation towards enhanced electrochemical sensing

et al. 2022

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Section: Sensing Applications Of Hapmentioning

confidence: 99%

Hydroxyapatite coatings: a critical review on electrodeposition parametric variations influencing crystal facet orientation towards enhanced electrochemical sensing

et al. 2022

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“…With the recent surge in the usage of electronic devices, − electromagnetic interference (EMI) poses a serious threat. Unwanted electromagnetic (EM) waves not only interfere with the normal functioning of electronic components, but certain studies suggest that it is a serious threat to human health. , EMI shielding is a technique to block undesired EM radiation by designing a material that either reflects or absorbs the incoming EM waves.…”

Section: Introductionmentioning

confidence: 99%

Absorption Dominated Directional Electromagnetic Interference Shielding through Asymmetry in a Multilayered Construct with an Exceptionally High Green Index

Sushmita

Ghosh

Nilawar

et al. 2022

ACS Appl. Mater. Interfaces

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Fabricating green electromagnetic interference (EMI) shields is the need of the hour because strong secondary reflections in the vicinity of the shield adversely affect the environment and the reliability of the neighboring devices. To this end, the present work aims to maximize the absorption-based EMI shielding through a multilayered construct comprising a porous structure (pore size less than λ/5), a highly conducting entity, and a layer to match the impedance. The elements of this construct were positioned so that the incoming electromagnetic (EM) radiation interacts with the other layers of the construct before the conducting entity. This positioning of the layers in the construct offers a high green shielding index (g s) and low reflection coefficient (R ∼ 0.1) with an exceptionally high percent absorption (up to 99%). Polyurethane (PU) foams were fabricated using the salt-leaching technique and strategically positioned with carbon nanotube (CNT) papers and polycarbonate (PC)-based films to obtain symmetric and asymmetric constructs. These structures were then employed to gain mechanistic insight into the directional dependency of shielding performance, g s, and heat dissipation ability. Interestingly, maximum total shielding effectiveness (SET) of −52 dB (88% absorption @8.2 GHz) and specific shielding effectiveness/thickness (SSEt) of −373 dB/cm2g were achieved for a symmetric construct whereas, for the asymmetric construct, the SET and SSEt were −37 dB and −280 dB/cm2g, respectively, with an exceptionally high g s of 8.6, the highest reported so far. The asymmetricity in the construct led to directional dependence of the absorption component (% SEA, shielding effectiveness due to absorption) and heat dissipation, primarily governed by the electrical and thermal conductivity gradient, respectively. This study opens new avenues in this field and reports constructs with an exceptionally high green index.

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“…By taking advantage of the inherent stress and temperature field during FDM printing, in situ chemical foaming can be triggered in the heating channel, and thus a 3D part with hierarchical porous structure can be fabricated . Moreover, given the fact that the piezoelectric effect strongly depends on the orientation of the dipoles, conductive fillers also shed some light on another route to enhance piezoelectric properties. , The conductive filler can form microcapacitors with the piezoelectric polymer which improve the current transmission, polling efficiency and the resultant piezoelectric properties. , It is notable that during the cell growth, the stretching and squeezing enable the conductive fillers to be dispersed around the cells and promote the accumulation of charges around the cells to form electrets. , It is rational to deduce that the synergetic effect from both structural design and electret effect, which can further improve the performance of 3D piezoelectric devices as well as sensors. − …”

Section: Introductionmentioning

confidence: 99%

Toward Balanced Piezoelectric and Mechanical Performance: 3D Printed Polyvinylidene Fluoride/Carbon Nanotube Energy Harvester with Hierarchical Structure

Zheng

Song

et al. 2022

Ind. Eng. Chem. Res.

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With rapid consumption of fossil energy and its impact on the environment, the desire for clean energy is gradually increasing around the world, and piezoelectric polymers have received extensive attention owing to their capability to harvest discrete mechanical energy in the environment. However, the existing piezoelectric devices are mostly low-dimensional fibers or films, making it difficult to achieve a good balance between mechanical robustness and piezoelectric output. Herein, a polyvinylidene fluoride (PVDF)/multiwalled carbon nanotube (MWCNT) scaffold with a hierarchical porous structure and geometry was fabricated by chemical-foaming-assisted fused deposition modeling (FDM). Chemical foaming was triggered by the heat accompanied during FDM molding, where a microporous structure was formed inside the part without affecting the geometric design to realize strain accumulation in normal space. Moreover, the conductive MWCNT formed discontinuous and parallel morphology around the pores, which not only promotes the polling process and formation of electrets, but also avoids the electrical breakdown caused by the formation of the conductive network. Accordingly, the combined effect of hierarchical structure and incorporation of MWCNT leads to a balanced piezoelectric (open circuit voltage of 8.46 V and short circuit current of 157 nA) and mechanical performance (compressive modulus of 14.07 MPa). These excellent properties all demonstrate the potential capabilities of the developed piezoelectric nanogenerators in the field of self-powered nanosensors and portable devices.

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Highly sensitive strain sensors with wide operation range from strong MXene-composited polyvinyl alcohol/sodium carboxymethylcellulose double network hydrogel

Cited by 151 publications

References 71 publications

Hydroxyapatite coatings: a critical review on electrodeposition parametric variations influencing crystal facet orientation towards enhanced electrochemical sensing

Hydroxyapatite coatings: a critical review on electrodeposition parametric variations influencing crystal facet orientation towards enhanced electrochemical sensing

Absorption Dominated Directional Electromagnetic Interference Shielding through Asymmetry in a Multilayered Construct with an Exceptionally High Green Index

Toward Balanced Piezoelectric and Mechanical Performance: 3D Printed Polyvinylidene Fluoride/Carbon Nanotube Energy Harvester with Hierarchical Structure

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