Design of Pd–Graphene–Au Nanorod Nanocomposite Catalyst for Boosting Suzuki–Miyaura Coupling Reaction by Assistance of Surface Plasmon Resonance

2019 ◽  
Vol 123 (40) ◽  
pp. 24575-24583 ◽  
Author(s):  
Takeharu Yoshii ◽  
Yasutaka Kuwahara ◽  
Kohsuke Mori ◽  
Hiromi Yamashita
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Coupling Reaction ◽  
Nanocomposite Catalyst

Surface Plasmon Resonance Signal Amplification Using Secondary Antibody Interaction for Illegal Compound Detection

2020 ◽  
Vol 845 ◽  
pp. 103-108
Author(s):  
Suherman ◽  
Dulal Chandra Kabiraz ◽  
Kinichi Morita ◽  
Toshikazu Kawaguchi
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Competitive Inhibition ◽  
Coupling Reaction ◽  
Primary Antibody ◽  
Antibody Detection ◽  
Secondary Antibody ◽  
Sensor Surface ◽  
Spr Sensor

The development of highly selective and sensitive surface plasmon resonance (SPR) immunoassay for the rapid detection of illegal compound using secondary antibody interaction labelled nanoparticle was conducted. For the construction of SPR sensor surface, the illegal compound (clenbuterol) was immobilized as antigen onto gold succinimide-terminated monolayer to perform amide-coupling reaction. In order to avoid non-specific reaction, the blocking agent (ethanol amine) was injected to the SPR system. Furthermore, indirect competitive inhibition method was employed in the detection of clenbuterol. In this work, the antibody solution (PBS solution containing clenbuterol antibody) premixed with a sample solution (PBS solution containing antigen) before the injection into the sensing system. As the premixed solution flowed over the sensor surface, the SPR senses the dielectric constant change at the interface due to the binding of the unreacted primary antibody to antigen-immobilized on the sensor surface. After this primary antibody detection, secondary antibody was injected to the SPR sensor surface. Here, we compared the signal difference of secondary antibody injection labelled Au nanoparticles (d = 40 nm). For the regeneration of the sensor surface, 0.1 M NaOH was used, so primary and secondary antibodies could be detached from the sensor surface. According to the indirect competitive inhibition method, it was found that the sensitivity for clenbuterol detection was enhanced from 2.5 ppt to 0.07 ppt.

scholarly journals A novel ultrasensitive surface plasmon resonance-based nanosensor for nitrite detection

RSC Advances ◽  
2019 ◽  
Vol 9 (31) ◽  
pp. 17698-17705 ◽  
Author(s):  
Pandeng Miao ◽  
Zhongdong Liu ◽  
Jun Guo ◽  
Ming Yuan ◽  
Ruibo Zhong ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Detection Limit ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Coupling Reaction ◽  
Eye Detection ◽  
Naked Eye ◽  
Nitrite Detection ◽  
Food Detection ◽  
Naked Eye Detection

A satellite-like AuNP aggregate-based nitrite detection nanosensor was designed via diazotization coupling reaction and can significantly lower the naked-eye detection limit to 3.0 ng mL−1. This nanosensor has important applications in food detection and cancer prevention.

scholarly journals Green synthesis of Au decorated CoFe2O4 nanoparticles for catalytic reduction of 4-nitrophenol and dimethylphenylsilane oxidation

RSC Advances ◽  
2019 ◽  
Vol 9 (38) ◽  
pp. 22116-22123 ◽  
Author(s):  
Samuel Saire-Saire ◽  
Eduardo C. M. Barbosa ◽  
Daniel Garcia ◽  
Leandro H. Andrade ◽  
Sergi Garcia-Segura ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Chemical Synthesis ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Catalytic Reduction ◽  
Synthesis Process ◽  
Hybrid Nanocomposite ◽  
Cofe2o4 Nanoparticles ◽  
Nanocomposite Catalyst ◽  
Reduction And Oxidation

We present a cleaner chemical synthesis process of a magnetic recoverable Au/CoFe2O4 hybrid nanocomposite catalyst that has remarkable activity in catalytic reduction and oxidation, improved by surface plasmon resonance.

Surface plasmon resonance sensor using functionalized alkanethiols monolayer for illegal compound detection

2016 ◽  
Vol 25 (01) ◽  
pp. 1650007 ◽  
Author(s):  
Suherman ◽  
Kinichi Morita ◽  
Toshikazu Kawaguchi
Keyword(s):  
Surface Plasmon Resonance ◽  
Molecular Electronics ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Competitive Inhibition ◽  
Coupling Reaction ◽  
Gold Surface ◽  
Sensor Surface ◽  
Resonance Sensor ◽  
Highly Sensitive Detection

The development of highly sensitive detection of [Formula: see text]-agonists compound by using surface plasmon resonance (SPR) immunoassay functionalized alkanethiols monolayer on gold surface was reported here. For the construction of robust SPR sensor surface, the illegal compound (as antigen) was immobilized onto gold succinimide-terminated monolayer to perform amide-coupling reaction. Structural characteristic of monolayer is an important issue for further application of selt-assembled monolayer (SAM)-based molecular electronics. This study focuses on the relation between structure of alkanethiols SAM of different chain length and its sensitivity of the detection. The surface structure is characterized by electrochemical methods and STM. The target compound in this research is clenbuterol as farmers used illegally to increase their profit gain. For the detection of clenbuterol, indirect competitive inhibition method was used. In this work, the SPR senses the dielectric constant change at the interface from the binding of the unreacted antibody to antigen-immobilized on the sensor surface. By this method, clenbuterol can be detected within ppt level and only requires 5[Formula: see text]min per sample. Furthermore, shorter chain alkanethiol sensor surface produces higher sensitivity in the detection process.

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.

Surface Plasmon Resonance Based Sensitive Immunosensor for Benzaldehyde Detection

2010 ◽  
Vol 130 (7) ◽  
pp. 269-274 ◽  
Author(s):  
Takeshi Onodera ◽  
Takuzo Shimizu ◽  
Norio Miura ◽  
Kiyoshi Matsumoto ◽  
Kiyoshi Toko
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance
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