Localized surface plasmon resonance (LSPR) biosensing using gold nanotriangles: detection of DNA hybridization events at room temperature

The Analyst ◽  
2014 ◽  
Vol 139 (19) ◽  
pp. 4964-4973 ◽  
Author(s):  
Leonor Soares ◽  
Andrea Csáki ◽  
Jacqueline Jatschka ◽  
Wolfgang Fritzsche ◽  
Orfeu Flores ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Dna Hybridization ◽  
Localized Surface Plasmon Resonance ◽  
Room Temperature ◽  
Red Shift ◽  
Localized Surface Plasmon ◽  
Target Dna ◽  
Gold Nanotriangles

Hybridization of target DNA to AuNT-probes causes LSPR to red-shift.

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.

Visible surface diffusion of gold nanostructures on a paper at room temperature through localized surface plasmon resonance

MRS Advances ◽  
2019 ◽  
Vol 4 (5-6) ◽  
pp. 325-330
Author(s):  
Nobuko Fukuda ◽  
Sakae Manaka
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Diffusion ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Room Temperature ◽  
Gold Nanostructures ◽  
Localized Surface Plasmon ◽  
Particle Sizes ◽  
Color Changes

ABSTRACTWe visually observed color changes of discontinuous gold surfaces on paper substrates through localized surface plasmon resonance (LSPR) at room temperature due to surface diffusion of gold nanostructures. Isolated nanoparticles and an uncompleted nanosheet of gold were obtained by thermal vapor deposition. After preservation for 8 months in air at room temperature, the particle sizes and shapes remarkably changed with color changes. The surface diffusion of the discontinuous gold on the paper would be derived from solid-state dieting, resulting in the growth of the nanosheet defect and coalescence of the nanoparticles. This is due to the total energy minimization of the surfaces of gold nanostructures and the paper and the interface between gold and the paper.

Near-infrared localized surface plasmon resonance of self-growing W-doped VO2 nanoparticles at room temperature

2017 ◽  
Vol 111 (19) ◽  
pp. 193102 ◽  
Author(s):  
Kazutaka Nishikawa ◽  
Yoshihiro Kishida ◽  
Kota Ito ◽  
Shin-ichi Tamura ◽  
Yasuhiko Takeda
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Room Temperature ◽  
Near Infrared ◽  
Localized Surface Plasmon
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