Direct observation of Coulomb crystals and liquids in strongly coupled rf dusty plasmas

J. H. Chu, I. Lin

Research output: Contribution to journalArticlepeer-review

1198 Scopus citations

Abstract

The strongly coupled dusty plasmas are formed by suspending negatively charged SiO2 fine particles with 10 m diameter in weakly ionized rf Ar discharges. The Coulomb crystals and liquids are directly observed for the first time using an optical microscope. By properly controlling the system parameters, hexagonal, fcc and bcc crystal structures and solids with coexisting different crystal structures can be formed. Increasing the rf power causes the transition to the more disordered liquid state.

Original languageEnglish
Pages (from-to)4009-4012
Number of pages4
JournalPhysical Review Letters
Volume72
Issue number25
DOIs
StatePublished - 1994

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