Abstract
We show high-purity synthesis, structural engineering and in situ optical investigation of a 2D plasmonic platform using huge silver nanoplates.
Highlights
Chemical synthesizing and morphology engineering are essential technologies for the achievement of plasmonic nanocrystals with high-quality crystal structures in a rapid and highyield way,[1] meeting the practical requirements of nanophotonic devices and system fabrication.[2]
Silver nanoplates (SNPs) with single-crystalline structures are highly expected building blocks for the construction of a two-dimensional (2D) plasmonic platform regarded as an advanced tool for the development of subwavelength light management technologies
Our achievements indicated that huge silver nanoplates (SNPs) fabricated by low-cost and simple chemical routes can serve as advanced plasmonic platforms and are useful in various elds such as nanoscale light manipulation,[10,11,12,13,14,25,26,27] nonlinear optical enhancement,[28,29] optoelectronic multiplex[30,31] and quantum information transmission.[32,33,34]
Summary
An ultra-high aspect ratio (large size and ultrathin thickness), the advantages of an SNP based 2D plasmonic platform have not been comprehensively explored in experiments. As the anisotropic growth mechanism and simultaneous existing H+ etching behavior during the reaction were clari ed, we proposed the addition of an etching agent of hydrogen peroxide (H2O2) and a protection agent of chloride ions (ClÀ) in different stages of the reaction which greatly improved the effectivity of crystal type self-etching and self-screening behaviors during the growth process With these improvements, the size and thickness limitations of SNP synthesis in aqueous solution were broken through and three types of SNP with wellengineered morphological features were achieved, as illustrated in Scheme 1. The size and thickness limitations of SNP synthesis in aqueous solution were broken through and three types of SNP with wellengineered morphological features were achieved, as illustrated in Scheme 1 They are nano-antennas with controllable localized surface plasmon resonance (LSPR) bands and huge 2D crystal structures having atomically at surfaces or decorated with hot spots. Our achievements indicated that huge SNPs fabricated by low-cost and simple chemical routes can serve as advanced plasmonic platforms and are useful in various elds such as nanoscale light manipulation,[10,11,12,13,14,25,26,27] nonlinear optical enhancement,[28,29] optoelectronic multiplex[30,31] and quantum information transmission.[32,33,34]
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