TY - JOUR
T1 - Heterogeneity in Dynamic Metamolecules
AU - Lee, Sunghee
AU - Ibrahim, Omar
AU - Fakhraai, Zahra
AU - Park, So Jung
N1 - Funding Information:
S.-J.P. acknowledges financial support from the National Research Foundation (NRF) of Korea (NRF-2018R1A2B3001049) and the Science Research Center (SRC) funded by the NRF (NRF-2017R1A5A105365). Electron microscope imaging was carried out with support from a Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education (NRF-2020R1A6C101B194). Z.F. and O.I. acknowledge partial funding from the Penn Laboratory for Research in Structure of Matter (LRSM) funded by the National Science Foundation NSF MRSEC grant (DMR-1720530) and the Department of Chemistry of University of Pennsylvania (summer fellowship for O.I.).
Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/4/21
Y1 - 2022/4/21
N2 - Here, we fabricated spherical assemblies of metal nanobeads with size or material heterogeneity to study how the mismatch in the strength and energy of surface plasmon resonance (SPR) of nanobead building blocks affects the global magnetic resonance modes. In binary metamolecules (BMMs) composed of 15 and 45 nm Au beads, small 15 nm beads can act as the medium between sparsely placed large nanobeads and enhance the overall plasmon coupling, resulting in a strong and narrow magnetic dipole resonance. In BMMs made of Au and Ag nanobeads of the same size, the coupling between Au and Ag nanobeads significantly contributes to the magnetic resonance modes, affecting both their strength and position, while it does not significantly affect electric modes. These results provide valuable guidelines for the fabrication of colloidal metamolecules with desired metamaterial properties.
AB - Here, we fabricated spherical assemblies of metal nanobeads with size or material heterogeneity to study how the mismatch in the strength and energy of surface plasmon resonance (SPR) of nanobead building blocks affects the global magnetic resonance modes. In binary metamolecules (BMMs) composed of 15 and 45 nm Au beads, small 15 nm beads can act as the medium between sparsely placed large nanobeads and enhance the overall plasmon coupling, resulting in a strong and narrow magnetic dipole resonance. In BMMs made of Au and Ag nanobeads of the same size, the coupling between Au and Ag nanobeads significantly contributes to the magnetic resonance modes, affecting both their strength and position, while it does not significantly affect electric modes. These results provide valuable guidelines for the fabrication of colloidal metamolecules with desired metamaterial properties.
UR - http://www.scopus.com/inward/record.url?scp=85128516151&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.2c01214
DO - 10.1021/acs.jpcc.2c01214
M3 - Article
AN - SCOPUS:85128516151
SN - 1932-7447
VL - 126
SP - 6668
EP - 6677
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 15
ER -