Facile Approach to Synthesize Au@ZnO Core–Shell Nanoparticles and Their Application for Highly Sensitive and Selective Gas Sensors

2015 ◽  
Vol 7 (18) ◽  
pp. 9462-9468 ◽  
Author(s):  
Sanjit Manohar Majhi ◽  
Prabhakar Rai ◽  
Yeon-Tae Yu
Keyword(s):  
Gas Sensors ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Highly Sensitive ◽  
Core Shell Nanoparticles

Au@Pd core–shell nanoparticles-decorated reduced graphene oxide: a highly sensitive and selective platform for electrochemical detection of hydrazine

RSC Advances ◽  
2015 ◽  
Vol 5 (64) ◽  
pp. 51690-51700 ◽  
Author(s):  
Soumen Dutta ◽  
Chaiti Ray ◽  
Sourav Mallick ◽  
Sougata Sarkar ◽  
Anindita Roy ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrochemical Detection ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Low Level ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
Core Shell Nanoparticles

An Aucore–Pdshell-decorated reduced graphene oxide nanocomposite is successfully employed for the electrochemical detection of low-level hydrazine in an aqueous solution.

Highly-sensitive label-free immunosensor for tumor necrosis factor α based on Ag@Pt core–shell nanoparticles supported on MWCNTs as an efficient electrocatalyst nanocomposite

RSC Advances ◽  
2015 ◽  
Vol 5 (87) ◽  
pp. 70781-70786 ◽  
Author(s):  
Mohammad Mazloum-Ardakani ◽  
Laleh Hosseinzadeh
Keyword(s):  
Electrochemical Immunosensor ◽  
Core Shell ◽  
Label Free ◽  
Shell Nanoparticles ◽  
Tnf Α ◽  
Highly Sensitive ◽  
Factor Α ◽  
Core Shell Nanoparticles ◽  
Necrosis Factor

A novel label-free electrochemical immunosensor for enzyme-free determination of TNF-α biomarker was fabricated based on bimetallic Ag@Pt core–shell nanoparticles supported on MWCNTs as a desirable immunosensor platform.

A highly sensitive and quantitative detection method for bisphenol A (BPA) by competitive immunoassay based on surface-enhanced Raman spectroscopy

2018 ◽  
Vol 47 (1) ◽  
pp. 38-46 ◽  
Author(s):  
Zhang Lei ◽  
Yingshan Chen ◽  
Zhiwen Liu ◽  
Wenjin Ji ◽  
Suqing Zhao
Keyword(s):  
Bisphenol A ◽  
Core Shell ◽  
Competitive Immunoassay ◽  
Shell Nanoparticles ◽  
Content Type ◽  
Coating Antigen ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Core Shell Nanoparticles

Purpose In this study, a highly sensitive and quantitative analysis method using surface-enhanced Raman scattering (SERS)-labeled immunoassay is adopted for bisphenol A bisphenol A (BPA) detection in water samples. Design/methodology/approach Primarily, an excellent SERS immuno-nanoprobe is prepared, which relays on Au/Ag core-shell nanoparticles tagged 4-mercaptobenzoic acid (4MBA) and labeled with specific antibody against BPA. Second, the coating antigen of 4,4-Bis(4-hydroxyphenol) valeric acid (BVA) coupling poly-L-lysine (PLL) conjugate (BVA-PLL) is fastened on the substrate. Based on competitive immunoassay, the antibody labeled on SERS immuno-nanoprobe will bind with the free BPA and BVA-PLL competitively. Findings A calibration curve was obtained by plotting the intensity of SERS signal of 4MBA at 1007 cm−1 versus the concentration of BPA. The results indicated that the limit of detection (LOD) for BPA is 1 ng/mL and present a great capacity for higher sensitivity. Furthermore, the method was able to quantitatively detect BPA in water samples, which was validated by high performance liquid chromatography (HPLC). Originality/value The method was developed based on competitive immunoassay, and the conjugate (BVA-PLL) was chosen as the coating antigen. Au/Ag core-shell nanoparticles played as the SERS active substrate and were labeled with Raman reporter. The value of this paper is supplying a wide potential for analysis of target analytes in the environmental monitoring and food safety.

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