A nanofabricated plasmonic core-shell-nanoparticle library
Artikel i vetenskaplig tidskrift, 2019

Three-layer core-shell-nanoparticle nanoarchitectures exhibit properties not achievable by single-element nanostructures alone and have great potential to enable rationally designed functionality. However, nanofabrication strategies for crafting core-shell-nanoparticle structure arrays on surfaces are widely lacking, despite the potential of basically unlimited material combinations. Here we present a nanofabrication approach that overcomes this limitation. Using it, we produce a library of nanoarchitectures composed of a metal core and an oxide/nitride shell that is decorated with few-nanometer-sized particles with widely different material combinations. This is enabled by resolving a long-standing challenge in this field, namely the ability to grow a shell layer around a nanofabricated core without prior removal of the lithographically patterned mask, and the possibility to subsequently grow smaller metal nanoparticles locally on the shell only in close proximity of the core. Focusing on the application of such nanoarchitectures in plasmonics, we show experimentally and by Finite-Difference Time-Domain (FDTD) simulations that these structures exhibit significant optical absorption enhancement in small metal nanoparticles grown on the few nanometer thin dielectric shell layer around a plasmonic core, and derive design rules to maximize the effect by the tailored combination of the core and shell materials. We predict that these structures will find application in plasmon-mediated catalysis and nanoplasmonic sensing and spectroscopy.

Författare

Arturo Susarrey- Arce

Chalmers, Fysik, Kemisk fysik

K. M. Czajkowski

Uniwersytet Warszawski

Iwan Darmadi

Chalmers, Fysik, Kemisk fysik

Sara Nilsson

Chalmers, Fysik, Kemisk fysik

Irem Tanyeli

Chalmers, Fysik, Kemisk fysik

Svetlana Alekseeva

Chalmers, Fysik, Kemisk fysik

Tomasz Antosiewicz

Chalmers, Fysik, Bionanofotonik

Christoph Langhammer

Chalmers, Fysik, Kemisk fysik

Nanoscale

20403372 (eISSN)

Vol. 11 44 21207-21217

Styrkeområden

Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)

Ämneskategorier

Materialkemi

Annan fysik

Den kondenserade materiens fysik

Infrastruktur

Chalmers materialanalyslaboratorium

Nanotekniklaboratoriet

DOI

10.1039/c9nr08097j

PubMed

31663581

Mer information

Senast uppdaterat

2020-08-27