Peer review declaration

All papers published in this volume of Journal of Physics: Conference Series have been peer reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Single blind • Conference submission management system: via conference website and conference email • Number of submissions received: 263 • Number of submissions sent for review: 233 • Number of submissions accepted: 185 • Acceptance Rate (Number of Submissions Accepted / Number of Submissions Received X 100): 70% • Average number of reviews per paper: 1 • Total number of reviewers involved: 39 • Any additional info on review process: 1. The review process was according to the guidelines given by JPCS. 2. Plagiarism is prohibited. 3. Reviews have been conducted by expert referees, who have been requested to provide unbiased and constructive comments aimed, whenever possible, at improving the work. 4. In all cases at least minor revisions were required. • Contact person for queries: Name : Nor Basid Adiwibawa Prasetya, S.Si., M.Sc., Ph.D. Affiliation : Department of Chemistry, Faculty of Science and Mathematics, Diponegoro University, Indonesia Email : nor.basid.prasetya@live.undip.ac.id