Intercalated oligomer doubles plasticity for strong and conductive graphene papers and composites

Shen, Kai; Lin, Jiahao; Wang, Ziqiu; Cai, Gangfeng; Ming, Xin; Liu, Yingjun; Gao, Chao; Xu, Zhen

doi:10.1016/j.carbon.2023.03.036

Cited by 6 publications

(3 citation statements)

References 58 publications

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“…At 480 K, DF emission became dominant, which can be attributed to the promotion of non-radiative transitions at high temperatures, thus weakening RTP emission (Figure 10a). Similarly, Shen et al [187] used ciprofloxacin and boric acid (BA) as precursors to obtain CDsbased long afterglow materials with dual-mode emission when heated at 180 °C. The study revealed that the emission at 438 nm belongs to DF, while the emission at 490 nm belongs to RTP.…”

Section: Temperature Dependencementioning

confidence: 99%

Multicolor Afterglow from Carbon Dots: Preparation and Mechanism

Ran,

Liu,

Zhuang

et al. 2023

Small Methods

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Carbon dots (CDs), as emerging long afterglow luminescent material, have attracted the attention of researchers and become one of the hot topics in long afterglow materials. In recent years, researchers have obtained a series of CDs‐based long afterglow materials with different properties utilizing matrix‐assisted and self‐protective methods. To meet diverse application needs, the development of multicolor CDs‐based long afterglow materials is a focus and challenge in this field. Most of the previously reported CDs‐based long afterglow materials generally emit blue or green afterglow. Recently, some multicolor systems have been discovered, and the emission range can extend from ultraviolet to near‐infrared. However, there is a lack of systematic and in‐depth analysis regarding the preparation strategy and luminescence mechanism of multicolor afterglow from CDs‐based long afterglow materials. Based on this, this review summarizes the preparation strategies of multicolor afterglow from raw materials and reaction parameters. Then, the luminescence mechanisms of multicolor afterglow are analyzed from seven factors, including carbonization degree, surface state, aggregation degree, temperature dependence, excitation dependence, multi‐emission center, and energy transfer. Moreover, the applications of multicolor afterglow from CDs‐based long afterglow materials are introduced. Finally, the problems and challenges in this field are discussed, and the future development directions are analyzed.

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Section: Temperature Dependencementioning

confidence: 99%

Multicolor Afterglow from Carbon Dots: Preparation and Mechanism

Ran,

Liu,

Zhuang

et al. 2023

Small Methods

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“…Carbon-based materials [ 33 – 44 ], such as highly thermally conductive graphitic film (GF) with the combined merits of low density, outstanding flexibility, low thermal expansion coefficient, and intrinsic chemical resistance offer a promising alternative to traditional thermal conductive materials [ 45 – 48 ]. At present, there are two main ways to achieve high structure stability and performance at room temperature, including the interlayer crosslinking strategy [ 49 , 50 ] and the plasticizing orientation method [ 51 , 52 ]. However, utilizing cross-linked polymers would reduce the thermal conductivity, and plasticization stretching could only eliminate the partial internal defects of films, but its intrinsic structural instability could not be solved under extreme conditions.…”

Section: Introductionmentioning

confidence: 99%

Highly Thermally Conductive and Structurally Ultra-Stable Graphitic Films with Seamless Heterointerfaces for Extreme Thermal Management

Zhang,

Hao,

Shi

et al. 2023

Nano-Micro Lett.

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Highly thermally conductive graphitic film (GF) materials have become a competitive solution for the thermal management of high-power electronic devices. However, their catastrophic structural failure under extreme alternating thermal/cold shock poses a significant challenge to reliability and safety. Here, we present the first investigation into the structural failure mechanism of GF during cyclic liquid nitrogen shocks (LNS), which reveals a bubbling process characterized by “permeation-diffusion-deformation” phenomenon. To overcome this long-standing structural weakness, a novel metal-nanoarmor strategy is proposed to construct a Cu-modified graphitic film (GF@Cu) with seamless heterointerface. This well-designed interface ensures superior structural stability for GF@Cu after hundreds of LNS cycles from 77 to 300 K. Moreover, GF@Cu maintains high thermal conductivity up to 1088 W m−1 K−1 with degradation of less than 5% even after 150 LNS cycles, superior to that of pure GF (50% degradation). Our work not only offers an opportunity to improve the robustness of graphitic films by the rational structural design but also facilitates the applications of thermally conductive carbon-based materials for future extreme thermal management in complex aerospace electronics.

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“…In-plane stretching is a practical way to decrease interlayer misalignment while keeping or increasing sheet density ( 1 , 13 ). However, an in-plane stretch can introduce in-plane sheet anisotropy, which decreases the mechanical and electrical properties in sheet directions that are orthogonal to the draw direction ( 15 , 16 ).…”

mentioning

confidence: 99%

Water-induced strong isotropic MXene-bridged graphene sheets for electrochemical energy storage

Yang,

Li,

Fang

et al. 2024

Science

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Graphene and two-dimensional transition metal carbides and/or nitrides (MXenes) are important materials for making flexible energy storage devices because of their electrical and mechanical properties. It remains a challenge to assemble nanoplatelets of these materials at room temperature into in-plane isotropic, free-standing sheets. Using nanoconfined water-induced basal-plane alignment and covalent and π-π interplatelet bridging, we fabricated Ti 3 C 2 T x MXene-bridged graphene sheets at room temperature with isotropic in-plane tensile strength of 1.87 gigapascals and moduli of 98.7 gigapascals. The in-plane room temperature electrical conductivity reached 1423 siemens per centimeter, and volumetric specific capacity reached 828 coulombs per cubic centimeter. This nanoconfined water-induced alignment likely provides an important approach for making other aligned macroscopic assemblies of two-dimensional nanoplatelets.

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Intercalated oligomer doubles plasticity for strong and conductive graphene papers and composites

Cited by 6 publications

References 58 publications

Multicolor Afterglow from Carbon Dots: Preparation and Mechanism

Multicolor Afterglow from Carbon Dots: Preparation and Mechanism

Highly Thermally Conductive and Structurally Ultra-Stable Graphitic Films with Seamless Heterointerfaces for Extreme Thermal Management

Water-induced strong isotropic MXene-bridged graphene sheets for electrochemical energy storage

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