scholarly journals Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kyeong Rim Ryu ◽  
Geun Wan Kim ◽  
Ji Won Ha
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Total Internal Reflection ◽  
Internal Reflection ◽  
Detection Sensitivity ◽  
Localized Surface Plasmon ◽  
Aspect Ratios ◽  
Scattering Spectrum

AbstractPlasmonic gold nanoparticles are widely used in localized surface plasmon resonance (LSPR) sensing. When target molecules adsorb to the nanoparticles, they induce a shift in the LSPR scattering spectrum. In conventional LSPR sensing, this shift is monitored at the maximum of the LSPR scattering peak. Herein, we describe the sensitivity of detecting chemisorption of 1-alkanethiols with different chain lengths (1-butanethiol and 1-haxanethiol) on single gold nanorods (AuNRs) of fixed diameter (25 nm) and three different aspect ratios under a total internal reflection scattering microscope. For single AuNRs of all sizes, the inflection point (IF) at the long-wavelength side (or low-energy side) of the LSPR scattering peak showed higher detection sensitivity than the traditionally used peak maximum. The improved sensitivity can be ascribed to the shape change of the LSPR peak when the local refractive index is increased by chemisorption. Our results demonstrate the usefulness of tracking the curvature shapes by monitoring the homogeneous LSPR IF at the red side of the scattering spectrum of single AuNRs.

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.

Photocurrent enhancement of porphyrin molecules over a wide-wavelength region based on combined use of silver nanoprisms with different aspect ratios

2015 ◽  
Vol 3 (43) ◽  
pp. 11439-11448 ◽  
Author(s):  
Kosuke Sugawa ◽  
Naoto Takeshima ◽  
Koji Uchida ◽  
Hironobu Tahara ◽  
Shota Jin ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Wavelength Range ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Wavelength Region ◽  
Localized Surface Plasmon ◽  
Silver Nanoprisms ◽  
Aspect Ratios ◽  
Combined Use

We succeeded in controlling the wavelength range in which the photocurrent of porphyrin is enhanced by tuning as well as expanding the wavelength ranges in which the localized surface plasmon resonance occurs.

Comparison of sensitivity of the refractometric methods of frustrated total internal reflection and surface plasmon resonance

2020 ◽  
pp. 44-49
Author(s):  
I. N. Pavlov
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Total Internal Reflection ◽  
Resonance Method ◽  
Internal Reflection ◽  
Optical Methods ◽  
Thin Boundary Layer ◽  
Experimental Conditions ◽  
Frustrated Total Internal Reflection

Two optical methods, namely surface plasmon resonance imaging and frustrated total internal reflection, are described in the paper in terms of comparing their sensitivity to change of refractive index of a thin boundary layer of an investigated medium. It is shown that, despite the fact that the theoretically calculated sensitivity is higher for the frustrated total internal reflection method, and the fact that usually in practice the surface plasmon resonance method, on the contrary, is considered more sensitive, under the same experimental conditions both methods show a similar result.

Strain‐Induced Modulation of Localized Surface Plasmon Resonance in Ultrathin Hexagonal Gold Nanoplates

2021 ◽  
pp. 2100653
Author(s):  
Gyeong‐Su Park ◽  
Kyung Suk Min ◽  
Hyuksang Kwon ◽  
Sangwoon Yoon ◽  
Sangwon Park ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon

An Eye-Shaped Ultra-Sensitive Localized Surface Plasmon Resonance–Based Biochemical Sensor

Plasmonics ◽  
2021 ◽  
Author(s):  
Mohammad Rakibul Islam ◽  
Fahim Yasir ◽  
Md. Rakib Hossain Antor ◽  
Mahmudul Hassan Turja ◽  
Ashikur Rahman ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Biochemical Sensor

scholarly journals Localized surface plasmon resonance in deep ultraviolet region below 200 nm using a nanohemisphere on mirror structure

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kohei Shimanoe ◽  
Soshi Endo ◽  
Tetsuya Matsuyama ◽  
Kenji Wada ◽  
Koichi Okamoto
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Ultraviolet Region ◽  
Simple Method ◽  
Thin Film Layer ◽  
Deep Ultraviolet ◽  
Two Peaks

AbstractLocalized surface plasmon resonance (LSPR) was performed in the deep ultraviolet (UVC) region with Al nanohemisphere structures fabricated by means of a simple method using a combination of vapor deposition, sputtering, and thermal annealing without top-down nanofabrication technology such as electron beam lithography. The LSPR in the UV region was obtained and tuned by the initial metal film thickness, annealing temperature, and dielectric spacer layer thickness. Moreover, we achieved a flexible tuning of the LSPR in a much deeper UVC region below 200 nm using a nanohemisphere on a mirror (NHoM) structure. NHoM is a structure in which a metal nanohemisphere is formed on a metal substrate that is interposed with an Al2O3 thin film layer. In the experimental validation, Al and Ga were used for the metal hemispheres. The LSPR spectrum of the NHoM structures was split into two peaks, and the peak intensities were enhanced and sharpened. The shorter branch of the LSPR peak appeared in the UVC region below 200 nm. Both the peak intensities and linewidth were flexibly tuned by the spacer thickness. This structure can contribute to new developments in the field of deep UV plasmonics.

Plasma enhanced label-free immunoassay for alpha-fetoprotein based on a U-bend fiber-optic LSPR biosensor

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 23990-23998 ◽  
Author(s):  
Gaoling Liang ◽  
Zhongjun Zhao ◽  
Yin Wei ◽  
Kunping Liu ◽  
Wenqian Hou ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Fiber Optic ◽  
Cost Effective ◽  
Alpha Fetoprotein ◽  
Localized Surface Plasmon ◽  
Label Free

A simple, label-free and cost-effective localized surface plasmon resonance (LSPR) immunosensing method was developed for detection of alpha-fetoprotein (AFP).

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