Probing the dispersivity of tunable refractive index in the visible range by sensitive localized surface plasmon resonance inflection points in single gold nanorods

2020 ◽  
Vol 749 ◽  
pp. 137416
Author(s):  
Philippe Vuka Tsalu ◽  
Seong Woo Moon ◽  
Zephyrin Gushimana Yav ◽  
Ji Won Ha
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Visible Range ◽  
Inflection Points ◽  
Tunable Refractive Index

Enhanced detection sensitivity of the chemisorption of pyridine and biotinylated proteins at localized surface plasmon resonance inflection points in single gold nanorods

The Analyst ◽  
2021 ◽  
Author(s):  
Kyeong Rim Ryu ◽  
Ji Won Ha
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Detection Sensitivity ◽  
Localized Surface Plasmon ◽  
Chemical Adsorption ◽  
Long Wavelength ◽  
Inflection Points

The homogeneous localized surface plasmon resonance (LSPR) inflection points (IFs) located at the long wavelength side of the LSPR scattering peak exhibited the highest sensitivity for the detection of chemical adsorption with respect to the counterpart LSPR peak maxima.

scholarly journals Shape Effect on the Refractive Index Sensitivity at Localized Surface Plasmon Resonance Inflection Points of Single Gold Nanocubes with Vertices

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hui Bin Jeon ◽  
Philippe Vuka Tsalu ◽  
Ji Won Ha
Keyword(s):  
Gold Nanoparticles ◽  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Shape Effect ◽  
Frequency Shifts ◽  
Inflection Points

Abstract Plasmonic gold nanoparticles with sharp tips and vertices, such as gold bipyramids (AuBPs) and gold nanocubes (AuNCs), have been widely used for high-sensitivity localized surface plasmon resonance (LSPR) sensing. However, conventional LSPR sensors based on frequency shifts have a major disadvantage: the asymmetry and broadening of LSPR peaks because of instrumental, environmental, and chemical noises that limit the precise determination of shift positions. Herein, we demonstrated an alternative method to improve the efficiency of the sensors by focusing on homogeneous LSPR scattering inflection points (IFs) of single gold nanoparticles with a single resonant mode. In addition, we investigated the effect of the shape and vertices of AuNCs on the refractive index (RI) sensitivity of homogeneous LSPR IFs by comparing with gold nanospheres (AuNSs) of similar size. The results show that for both AuNCs and AuNSs, tracking homogeneous LSPR IFs allows for higher RI sensitivity than tracking the frequency shifts of the LSPR peaks. Furthermore, single AuNCs with vertices exhibited higher RI sensitivity than single AuNSs of similar size in the homogeneous LSPR IFs. Therefore, we provided a deeper insight into the RI sensitivity of homogeneous LSPR IFs of AuNCs with vertices for their use in LSPR-based biosensors.

Effects of refractive index of mixed solution on localized surface plasmon resonance

2013 ◽  
Vol 25 (2) ◽  
pp. 500-504
Author(s):  
张杨 Zhang Yang ◽  
彭杨 Peng Yang ◽  
侯静 Hou Jing ◽  
姜宗福 Jiang Zongfu
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Mixed Solution

Plasmon-enhanced electrocatalytic hydrogen/oxygen evolution by Pt/Fe–Au nanorods

2018 ◽  
Vol 6 (17) ◽  
pp. 7364-7369 ◽  
Author(s):  
Xia Guo ◽  
Xiaotong Li ◽  
Shufang Kou ◽  
Xianfeng Yang ◽  
Xi Hu ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Oxygen Evolution ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Plasmon Resonance ◽  
Electrocatalytic Activity ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Au Nanorods ◽  
Spr Effect

Plasmonic dumbbell-like gold nanorods were selected as models to further investigate the SPR effect on electrocatalysis. Under the excitation of localized surface plasmon resonance of Pt/Fe–Au gold nanorods, the electrocatalytic activity of this catalyst for HER and OER was well improved.

Analysis of Localized Surface Plasmon Resonance in Ag/ITO/CdS/SiO2 Multilayered Nanostructured Composite

NANO ◽  
2015 ◽  
Vol 10 (08) ◽  
pp. 1550117
Author(s):  
Chao Liu ◽  
Jingwei Lv ◽  
Famei Wang ◽  
Qiang Liu ◽  
Haiwei Mu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Surrounding Medium ◽  
Blue Shift ◽  
Red Shift ◽  
Localized Surface Plasmon ◽  
Extinction Spectra

Multilayered nanoshells have attracted much attention due to their unique optical, electronic and magnetic properties. In this work, numerical calculation using discrete dipole approximation (DDA) is conducted to investigate the quad-layered metal nanoshell consisting of a particle with a dielectric silica (SiO2) core, inner cadium sulfide (CdS) shell, middle indium tin oxide (ITO) shell and outer metal silver (Ag) shell. The phenomenon is interpreted by plasmon hybridization theory and the Ag–ITO–CdS–SiO2 multilayered nanoshells are studied by extinction spectra of localized surface plasmon resonance. The variation in the spectrum peak with nanoparticle thickness and refractive index of the surrounding medium is derived. The electric field enhancement contour around the nanoparticles under illumination is analyzed at the plasmon resonance wavelength. The [Formula: see text], [Formula: see text], and [Formula: see text] modes red-shift with the refractive index of the surrounding medium and increase in the layer thickness causes either blue-shift or red-shift as shown by the extinction spectra. The mechanism of the red-shift or blue-shift is discussed. The [Formula: see text] mode blue-shifts and furthermore, the [Formula: see text] and [Formula: see text] modes of the Ag coated multilayered nanostructure are noticeable by comparing the extinction efficiency spectra of the Au–ITO–CdS–SiO2 and Ag–ITO–CdS–SiO2 multilayered nanoshells.

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