Gap-mode excitation, manipulation, and refractive-index sensing application by gold nanocube arrays

Abstract

The gap mode is manipulated by Au nanocube arrays fabricated by the electrostatic-adhesion method with the application for refractive-index sensing.

Toward high-performance refractive index sensor using single Au nanoplate-on-mirror nanocavity

“…13,24 However, due to the strong radiation loss, the dipole mode has a very broad linewidth, resulting in a small FOM value that limits the sensing performance. To circumvent this obstacle, patterned metallic arrays are used to compress the linewidth of plasmon resonance via coupling between the surface plasmon polariton (SPP) of the array and the LSPR, [25][26][27] rendering a significant promotion of optical sensing. The averaging effect introduced by the plasmonic array nevertheless hampers the detection of the intrinsic signal of a single mole-cule buried in the ensemble response.…”

Unbiased Glucose Biosensing Based on a Schottky Junction Comprised of Au Nanoparticle-Decorated TiO2-Coated Al Films

“…In the early stage, blood glucose monitoring is the preferred method for diabetes diagnosis, but a definite diagnosis cannot be obtained until the level of blood glucose is obviously out of the normal range. At present, the glucose detection technologies include colorimetric, mass spectroscopic, plasmonic, − electrochemical, photoelectrochemical (PEC), , surface-enhanced Raman scattering, and other methods . Among them, mass spectroscopic and surface-enhanced Raman scattering methods are usually regarded as the precise ones, while a complex device is required, and the detectable concentration range is relatively small; colorimetric and plasmonic methods are based on the optical spectrum change, and the selectivity is commonly not satisfactory; an electrochemical method is most widely used for commercial applications, while an external bias is required and the detection of limit is relatively large.…”

Enhanced plasmonic sensing of single gold nanoparticles with narrowed resonance linewidths

“…One option is plasmonic structures made of designed metasurfaces/metamaterials. These delicate structures have been tested to improve the FOM to some extent, 13,[17][18][19][20][21][22][23][24][25][26][27][28][29][30] but at the cost of fabrication complication and high expenses. Another compelling option, as a low-cost and straightforward method, is colloidal plasmonic nanoparticles (NPs).…”