Colloidal Gold Nanocups with Orientation-Dependent Plasmonic Properties

Ruibin Jiang; Feng Qin; Yejing Liu; Xing Yi Ling; Jun Guo; Minghua Tang; Si Cheng; Jianfang Wang

doi:10.1002/adma.201601442

Colloidal Gold Nanocups with Orientation-Dependent Plasmonic Properties

Adv Mater. 2016 Aug;28(30):6322-31. doi: 10.1002/adma.201601442. Epub 2016 May 11.

Authors

Ruibin Jiang^{1

2}, Feng Qin¹, Yejing Liu³, Xing Yi Ling³, Jun Guo⁴, Minghua Tang⁴, Si Cheng⁵, Jianfang Wang¹

Affiliations

¹ Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, SAR China.
² School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China.
³ Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore.
⁴ Testing & Analysis Center, Soochow University, Suzhou, 215123, China.
⁵ College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.

PMID: 27167721
DOI: 10.1002/adma.201601442

Abstract

Colloidal gold nanocups are synthesized through single-vertex-initiated gold deposition on PbS nanooctahedrons and subsequent selective dissolution of the PbS component. They possess strong magnetic plasmon resonance and exhibit remarkable orientation-dependent plasmonic properties when deposited on flat substrates. They can also effectively couple s-polarized light into the interfacial region between the nanocup and substrate.

Keywords: PbS nanocrystals; gold nanocups; heteronanostructures; plasmon resonance; surface-enhanced Raman scattering.