Ultrastrong yet Ductile 2D Titanium Nanomaterial for On-Skin Conformal Triboelectric Sensing

Yu, Qing; Wang, Qing; Chen, Chaojie; Zhang, Zhibo; Yang, Ziyin; Chen, Huan; Zeng, Qiaoshi; Zi, Yunlong; Fan, Jun; Yang, Yong

doi:10.1021/acs.nanolett.3c01776

Cited by 6 publications

(13 citation statements)

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“…It is worth noting that the PSBEE-fabricated 2D nanomaterials exhibit a unique nanostructure resulting from plausible chemical reactions between deposited metals (or even ceramics) and polymer chains of PVA. These reactions lead to the incorporation of nonmetallic elements, such as carbon and oxygen, within the PSBEE-fabricated 2D nanomaterials. ,, Figure a depicts a typical mechanochemical process for producing 2D metallic nanomaterials using PSBEE. Through physical vapor deposition, metallic atoms are ejected from their respective targets and experience physical cooling during their flight toward the PVA substrate, due to collision with gas molecules (e.g., Ar) .…”

Section: Fabrication Methodsmentioning

confidence: 99%

“…Subsequently, mechanical exfoliation further modifies the internal nanostructure of the 2D nanomaterials. Consequently, this process leads to the generation of amorphous carbon in 2D gold-based nanomaterials (Figure b), the development of a heterogeneous nanostructure containing nanocrystals of Ti, TiO 2 , and Ti 3 C 2 T x MXene-like phase in 2D titanium-based nanomaterials (Figure c), and the formation of a metal–ceramic dual-phase nanostructure in 2D high-entropy alloy-based nanomaterials (Figure d–e) …”

Section: Fabrication Methodsmentioning

confidence: 99%

Section: Fabrication Methodsmentioning

confidence: 99%

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Polymer-Based Fabrication of 2D Metallic and Ceramic Nanomaterials

Yao,

Zhu,

Teng

et al. 2024

Acc. Mater. Res.

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Metrics & MoreArticle RecommendationsCONSPECTUS: Since the ground-breaking achievement of successfully exfoliating singlelayer graphene in 2004, there has been significant and rapid development in the field of twodimensional (2D) nanomaterials. In the field of materials science, 2D nanomaterials are defined as freestanding nanomembranes with a thickness below 100 nm and other lateral dimensions that can extend to the millimeter scale or beyond. These materials exhibit exceptional mechanical, physical, and chemical properties due to their extremely high surface area to volume ratios, surpassing those of their bulk counterparts. As a result, numerous topdown and bottom-up methods have emerged over the past decades to synthesize novel 2D nanomaterials, catering to diverse applications. In this Account, we review the existing topdown methods, such as mechanical compression and mechanical exfoliation, as well as bottomup methods including hydrothermal induction/solvothermal synthesis, chemical vapor deposition synthesis, etc. We critically discuss the advantages and limitations of each method. Subsequently, we highlight our recently developed method known as polymer surface buckling enabled exfoliation (PSBEE). Unlike previous synthesis techniques, PSBEE is based on the chemical reaction between metals and polymers to fabricate 2D nanomaterials with unique nanostructures. This approach offers a simple, efficient, cost-effective, and environmentally friendly means of achieving large-scale production of 2D nanomaterials, featuring an extremely high lateral size to thickness ratio ranging from 10 6 to 10 7 . Notably, PSBEE eliminates the need for chemical etching and enables precise control over the morphology of the synthesized nanomaterials, allowing for transitions from 2D nanomembranes to 1D nanotubes. Through thermal annealing, some of the PSBEE-fabricated 2D nanomaterials, such as 2D gold nanomaterials, can undergo pyrolysis and transform into 0D gold nanoparticles. Furthermore, the versatility of PSBEE extends beyond 2D metallic nanomaterials to the synthesis of 2D ceramic nanomaterials, showcasing its broad applicability across diverse material systems. The unique nanostructures of PSBEE-fabricated 2D nanomaterials, usually featuring a network of nanosized ceramics and metals, contribute to their exceptional mechanical and functional properties. These include an outstanding elastic strain limit, superb strength, remarkable plasticity, superior fracture toughness, high electrocatalytic properties, and unique triboelectric performance. Consequently, these properties lead to novel applications of the PSBEE-fabricated nanomaterials, such as triboelectric sensing and 2D electrocatalysis. At the same time, the PSBEE method also offers notable advantages in terms of scalable production, high throughput efficiency, and low energy consumption, making it highly suitable for future industrial applications. In general, polymer-based fabrication of 2D nanomaterials opens up possibilities for producing diverse and technologica...

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Section: Fabrication Methodsmentioning

confidence: 99%

Section: Fabrication Methodsmentioning

confidence: 99%

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Polymer-Based Fabrication of 2D Metallic and Ceramic Nanomaterials

Yao,

Zhu,

Teng

et al. 2024

Acc. Mater. Res.

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“…According to the working conditions, they can be divided into two types of application areas. The first is the field where the tactile e-skin is attached to the real human skin, − and the second is the field where the tactile e-skin is attached to the surface of bionic human skin. − In fact, the tactile e-skin used in both fields has a high demand for breathability. Currently, there are remarkable application cases of tactile e-skin attached to real skin, − which have different sensing principles, have flexible structures, and are made of functional materials.…”

Section: Introductionmentioning

confidence: 99%

Breathable and Durable Tactile e-Skin Based on S-Shaped Nanofiber Networks by Patterned Additive Manufacturing

Bu,

Song

2024

ACS Appl. Nano Mater.

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Flexible metal-based electrodes with stable resistance and low crack growth rates have important application value in the field of tactile electronic skin, but their breathable performance and durability are at a low level. S-shaped metal nanonetwork electrodes, based on S-shaped nanofiber substrates, are capable of achieving high breathability, excellent electrical properties, and stretch-resistant mechanical properties, simultaneously. Current manufacturing methods of S-shaped nanofiber substrates all suffer from various disadvantages, and they almost all use subtractive fabrications with complex processes and have environmental pollution. Here, in order to prepare durable and breathable tactile e-skin with environmentally friendly, low-cost, and efficient manufacture, a nanofiber-patterned additive manufacturing method is proposed. This additive manufacturing method is based on electrospinning to redesign the collection terminal. Through the design and dimensional optimization of the stacked electrodes, a pronounced electric field gradient forms on the upper surface of the collection terminal. This electric field gradient serves to induce the deposition of nanofibers within the targeted Sshaped pattern area. This one-step additive manufacturing method avoids complex processes, material waste, and chemical pollution, simultaneously enabling nanofibers of S-shaped substrates to have highly integrated structural characteristics. As a result, this durable tactile electronic skin, fabricated by this additive manufacturing method, can achieve sensitive tactile perception while ensuring normal evaporation of sweat on the skin surface and heat dissipation of the body.

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“…Flexible pressure sensors that transduce the external forces into electrical signals endow intelligent robotics, artificial prosthetics, wearable electronics, and human-machine interfaces with mechanosensory functions. − Mechanical inputs from the environment are converted to real-time electrical signals by distinct types of pressure sensors, including capacitive, − piezoelectric, − triboelectric, − and piezoresistive sensors. − A piezoresistive sensor that transduces pressure stimuli to resistance/current signals presents the advantages of simple structures and manufacturing processes, easy signal collection and readout mechanisms, and cost-effectiveness in fabrication. To meet the application requirements in complex scenarios, the pressure sensor often requires high sensitivity, excellent linearity over a broad pressure range, and high pressure resolution. ,,− Much effort has been devoted to engineering the active materials with surface micro/nanostructures, such as dome/pyramid/cone/pillar arrays, for improving the sensitivity and simultaneously broadening the pressure range. − Although encouraging progress has been made, the pressure sensors often possess varying sensitivity values within different pressure ranges due to the structural stiffening of such microstructures and corresponding signal attenuation with increasing pressure.…”

mentioning

confidence: 99%