About NANOMS2019 2019 4th International Conference on Nanotechnology and Materials Science (NANOMS2019) (http://www.nanoms.net/2019/en/home) is a platform for academic communications between specialists and scholars in the fields of nanotechnology and materials science. NANOMS2019 will be held in Nanjing, China, during Aug. 14-16, 2019. Nanjing is the capital of Jiangsu province and the second largest city in eastern China (after Shanghai). Publication 2019 4th International Conference on Nanotechnology and Materials Science (NANOMS2019) accepts original and unpublished papers. Both Full paper and Abstract are welcomed. Full papers accepted by the conference will be published online in the following journals of Science Publishing Group (http://www.sciencepublishinggroup.com). The journals have been indexed and abstracted by WorldCat, CrossRef, Electronic Journals Library, CNKI, Zeitschriftendatenbank, EZB, ResearchBib, Polish Scholarly Bibliography, Wissenschaftszentrum Berlin, etc. International Journal of Materials Science and Applications (IJMSA) http://www.sciencepublishinggroup.com/j/ijmsa ISSN Print: 2327-2635 ISSN Online: 2327-2643 Nanoscience and Nanometrology (NSNM) http://www.sciencepublishinggroup.com/j/nsnm ISSN Print: 2472-3622 ISSN Online: 2472-3630 Science Discovery (SD) http://www.sciencepublishinggroup.com/j/sd ISSN Print: 2331-0642 ISSN Online: 2331-0650