Plasmon Enhanced Direct Bandgap Emissions in Cu7 S4 @Au2 S@Au Nanorings

Donghwan Yoon; SeokJae Yoo; Kyoung Sik Nam; Hionsuck Baik; Kwangyeol Lee; Q-Han Park

doi:10.1002/smll.201602112

Plasmon Enhanced Direct Bandgap Emissions in Cu₇ S₄ @Au₂ S@Au Nanorings

Small. 2016 Nov;12(41):5728-5733. doi: 10.1002/smll.201602112. Epub 2016 Aug 30.

Authors

Donghwan Yoon^{1

2}, SeokJae Yoo³, Kyoung Sik Nam², Hionsuck Baik⁴, Kwangyeol Lee^{5

6}, Q-Han Park⁷

Affiliations

¹ Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul, 02841, Korea.
² Department of Chemistry, Korea University, Seoul, 02841, Korea.
³ Department of Physics, Korea University, Seoul, 02841, Korea.
⁴ Korea Basic Science Institute (KBSI), Seoul, 02841, Korea.
⁵ Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Seoul, 02841, Korea. kylee1@korea.ac.kr.
⁶ Department of Chemistry, Korea University, Seoul, 02841, Korea. kylee1@korea.ac.kr.
⁷ Department of Physics, Korea University, Seoul, 02841, Korea. qpark@korea.ac.kr.

PMID: 27572500
DOI: 10.1002/smll.201602112

Abstract

Nanostructured copper sulfides, promising earth-abundant p-type semiconductors, have found applications in a wide range of fields due to their versatility, tunable low bandgap, and environmental sustainability. The synthesis of hexagonal Cu₇ S₄ @Au₂ S@Au nanorings exhibiting plasmon enhanced emissions at the direct bandgap is reported. The synthesized Cu₇ S₄ @Au₂ S@Au nanorings show greatly enhanced absorption and emission by local plasmons compared to pure copper sulfide nanoparticles.

Keywords: cation exchanges; copper sulfides; surface plasmons; templates, nanorings.