AUTHOR=Wang Weiliang TITLE=Editorial: Electronic Properties, Vibrational Properties and Optical Properties of Van der Waals 2D Crystals JOURNAL=Frontiers in Materials VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2022.843290 DOI=10.3389/fmats.2022.843290 ISSN=2296-8016