Abstract

In this work, the use of gold and silver nanoshells was evaluated as a starting point for the establishment of colorimetric sensor platforms. The sensitivity and linearity of the nanoplatforms (${\text{SiO}_2}$ core–metallic shell nanoparticles) were assessed under the influence of the nanoshell configuration, color space, and light source illuminant. A computational procedure for selecting high-performance plasmonic colorimetric sensor platforms is described. The evaluation methodology involves considering five different color spaces and 15 different color components. By exploring crucial figures of merit for sensing, the performance of the plasmonic nanoplatforms was evaluated, exploring Mie theory. We determined that gold nanoshells are highly efficient on colorimetric sensing, while silver nanoshells are a better choice for spectroscopic sensors. Plasmonic nanoplatforms based on nanoshells with 10 nm ${\text{SiO}_2}$ core radii and 5 nm thick Au shells presented sensitivity values up to $4.70 \;{\text{RIU}^{- 1}}$, considering the hue angle of the HSV color space. Color variation of up to 40% was observed, due to the adsorption of a 10 nm thick molecular layer on the gold nanoshell surface. In the search for advances in colorimetric biosensors, the optimization approach used in this work can be extended to different nanostructures.

© 2023 Optica Publishing Group

Graphene coated micro-channel fiber sensor based on localized surface plasmon resonance

Jingao Zhang, Jinhui Yuan, Yuwei Qu, Shi Qiu, Chao Mei, Xian Zhou, Binbin Yan, Qiang Wu, Kuiru Wang, Xinzhu Sang, and Chongxiu Yu
J. Opt. Soc. Am. B 40(4) 695-704 (2023)

Numerical and analytical analysis of an ultrahigh sensitive surface plasmon resonance sensor based on a black phosphorene/graphene heterostructure

Abolfazl Nourizad, Saeed Golmohammadi, Mohammad Reza Tohidkia, and Ayuob Aghanejad
Appl. Opt. 62(25) 6542-6552 (2023)

High sensitivity and stability probe-type refractive index sensor based on an optical fiber metasurface

Xue Zhou, Yiming Wang, Yuanqi Sun, Fang Wang, Xin Yan, Xuenan Zhang, Takenobu Suzuki, Yasutake Ohishi, and Tonglei Cheng
J. Opt. Soc. Am. B 40(8) 1945-1952 (2023)

Research on photonic crystal fiber based on a surface plasmon resonance sensor with segmented silver-titanium dioxide film

Hairui Fang, Chenjing Wei, Dong Wang, Long Yuan, Shengxi Jiao, Zhiyu Bao, and Hanrui Yang
J. Opt. Soc. Am. B 37(3) 736-744 (2020)

Surface plasmon resonance sensor based on a D-shaped hollow microstructured fiber with bimetallic film

Yulai She, Tiansheng Ling, Yuting Zhang, Hao Du, Huajun Lai, and Yi Xu
J. Opt. Soc. Am. B 41(1) 90-97 (2024)