Open AccessSeeded Growth of Uniform Ag Nanoplates with High Aspect Ratio and Widely Tunable Surface Plasmon Bands
Author(s) -
Qiao Zhang,
Yongxing Hu,
Shirui Guo,
James Goebl,
Yadong Yin
Publication year - 2010
Publication title -
nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.853
H-Index - 488
eISSN - 1530-6992
pISSN - 1530-6984
DOI - 10.1021/nl1032233
Subject(s) - surface plasmon resonance , materials science , aspect ratio (aeronautics) , plasmon , nanotechnology , enhanced data rates for gsm evolution , surface plasmon , pulmonary surfactant , adhesion , optoelectronics , chemical engineering , nanoparticle , composite material , telecommunications , computer science , engineering
Silver nanoplates with an extremely high aspect ratio (up to over 400) and a widely tunable surface plasmon resonance (SPR) band have been successfully synthesized by combining the concepts of selective ligand adhesion and seeded growth. Citrate ligands are used as the sole surfactant to effectively block overgrowth on the basal {111} facets and only allow growth in the lateral direction. By slowing down the reaction rate using Ag-citrate complex as precursor, the thin nature of Ag nanoplates is maintained with the edge length grown up to 4 μm, which ensures the high aspect ratio and the widely tunable SPR band. We also observe a size distribution focusing effect that helps to produce uniform nanoplates as well as narrow SPR bands over a wide range, which is important in many practical applications.