Densification of MXene films by sequential bridging

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Voids are an essential scientific issue when it comes to traditional composite materials,because they greatly de-grade the latter\'s properties and usually cause catastrophic failure [1].Many characterization methods,such as mi-croscale X-ray computed tomography and ultrasonic attenuation,have been de-veloped to detect the void microstructure in composites [1].However,because nanoscale voids cannot be observed by the above methods,nanocomposites are usually considered compact ma-terials.Although fractured samples of nanocomposites are often used to char-acterize their microstructure,the true microstructure cannot be observed from them [2-4].Thus,void microstructure has long been ignored in assembled nanocomposites.
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