A brief review for fluorinated carbon: synthesis, properties and applications

Abstract

Fluorinated carbon (CFx), a thriving member of the carbonaceous derivative, possesses various excellent properties of chemically stable, tunable bandgap, good thermal conductivity and stability, and super-hydrophobic due to its unique structures and polar C-F bonding. Herein, we present a brief review of the recent development of fluorinated carbon materials in terms of structures, properties and preparation techniques. Meanwhile, the applications in energy conversions and storage devices, biomedicines, gas sensors, electronic devices, and microwave absorption devices are also presented. The fluorinated carbon contains various types of C-F bonds including ionic, semi-ionic and covalent C-F, C-F2, C-F3 bonds with tunable F/C ratios. The controllable designing of C-F bonding and F/C ratios play a key role to optimize the properties of fluorinated carbon materials. Until now, the potential issues and future opportunities of fluorinated carbon are proposed. The present review will provide a direction for tuning C-F bonding and F/C ratios, developing a safe and efficient fluorination method and popularizing the applications of fluorinated carbon materials.

Theories for triboelectric nanogenerators: A comprehensive review

“…However, the respective effects of oscillation amplitude A, contact area S, and loading period T are not clear from equations (18) and (19) because they are involved in both the combined dimensionless parameter and the normalized electric output. To solve this problem, we can apply some equivalent transformations to equations (18) and (19) and then we will get: Equation (20) can be used to examine the effect of S on the output power, while equations (21) and (22) enable us to investigate the effects of oscillation amplitude and period.…”

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