Plasmon–trion and plasmon–exciton resonance energy transfer from a single plasmonic nanoparticle to monolayer MoS2

Mingsong Wang; Wei Li; Leonardo Scarabelli; Bharath Bangalore Rajeeva; Mauricio Terrones; Luis M. Liz-Marzán; Deji Akinwande; Yuebing Zheng

doi:10.1039/C7NR03909C

Plasmon–trion and plasmon–exciton resonance energy transfer from a single plasmonic nanoparticle to monolayer MoS₂†

Mingsong Wang,^a Wei Li,^bcd Leonardo Scarabelli,

^efg Bharath Bangalore Rajeeva,^d Mauricio Terrones,

^hijk Luis M. Liz-Marzán,

^elm Deji Akinwande^bcd and Yuebing Zheng

*^ad

Author affiliations

* Corresponding authors

^a Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA

^b Microelectronics Research Center, The University of Texas at Austin, Austin, TX 78712, USA

^c Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USA

^d Materials Science & and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA
E-mail: zheng@austin.utexas.edu

^e Bionanoplasmonics Laboratory, CIC biomaGUNE Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain

^f Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA

^g California NanoSystems Institute, University of California, Los Angeles, California 90095, USA

^h Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA

ⁱ Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA

^j Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA

^k The Pennsylvania State University Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA 16802, USA

^l Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain

^m Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 20014 Donostia- San Sebastián, Spain

Abstract

Resonance energy transfer (RET) from plasmonic metal nanoparticles (NPs) to two-dimensional (2D) materials enhances the performance of 2D optoelectronic devices and sensors. Herein, single-NP scattering spectroscopy is employed to investigate plasmon–trion and plasmon–exciton RET from single Au nanotriangles (AuNTs) to monolayer MoS₂, at room temperature. The large quantum confinement and reduced dielectric screening in monolayer MoS₂ facilitates efficient RET between single plasmonic metal NPs and the monolayer. Because of the large exciton binding energy of monolayer MoS₂, charged excitons (i.e., trions) are observed at room temperature, which enable us to study the plasmon–trion interactions under ambient conditions. Tuning of plasmon–trion and plasmon–exciton RET is further achieved by controlling the dielectric constant of the medium surrounding the AuNT–MoS₂ hybrids. Our observation of switchable plasmon–trion and plasmon–exciton RET inspires new applications of the hybrids of 2D materials and metal nanoparticles.

This article is part of the themed collection: Editor’s Choice: Optical Spectroscopy of 2D materials

Nanoscale

Plasmon–trion and plasmon–exciton resonance energy transfer from a single plasmonic nanoparticle to monolayer MoS₂†

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