Application of bare gold nanoparticles in open-tubular CEC separations of polyaromatic hydrocarbons and peptides

2011 ◽  
Vol 35 (1) ◽  
pp. 73-78 ◽  
Author(s):  
Pavel Řezanka ◽  
Sille Ehala ◽  
Jakub Koktan ◽  
David Sýkora ◽  
Pavel Žvátora ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Polyaromatic Hydrocarbons ◽  
Bare Gold

Bare gold nanoparticles as facile and sensitive colorimetric probe for melamine detection

The Analyst ◽  
2012 ◽  
Vol 137 (22) ◽  
pp. 5382 ◽  
Author(s):  
Wei Chen ◽  
Hao-Hua Deng ◽  
Lei Hong ◽  
Zeng-Qiang Wu ◽  
Sheng Wang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Probe ◽  
Bare Gold

Continuous flow synthesis and characterization of tailor-made bare gold nanoparticles for use in SERS

2014 ◽  
Vol 181 (9-10) ◽  
pp. 1101-1108 ◽  
Author(s):  
Ángela I. López-Lorente ◽  
Miguel Valcárcel ◽  
Boris Mizaikoff
Keyword(s):  
Gold Nanoparticles ◽  
Continuous Flow ◽  
Synthesis And Characterization ◽  
Flow Synthesis ◽  
Bare Gold

Quick and Sensitive Detection of Prion Disease-Associated Isoform (PrPSc) Using a Novel Gold Surface/PrPSc/Gold Nanoparticles Sandwich SPR Detection Assay

2017 ◽  
Vol 48 ◽  
pp. 18-28 ◽  
Author(s):  
Zhi Chao Lou ◽  
Jin Qiang Sun ◽  
Jin Feng Wan ◽  
Xiao Hong Zhang ◽  
Hai Qian Zhang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Surface Plasmon ◽  
Prion Disease ◽  
Gold Surface ◽  
Disease Diagnosis ◽  
Detection Range ◽  
Detection Assay ◽  
Linear Detection ◽  
Presymptomatic Stage ◽  
Bare Gold

Prion protein has drawn great attention due to its pathological potential to prion diseases. Discriminate and detection of the trace quantities PrPSc is an important measure for prion disease diagnosis at the presymptomatic stage. In this study, we developed a novel sandwich surface plasmon resonance (SPR) assay for the detection of PrPSc, involving bare gold surfaces and bare gold nanoparticles. PrPSc can be captured by the SPR sensing surface via a surface assisted coupling reaction between its intra-molecular disulfide bond and the gold atoms, while PrPC cannot bind to the gold surface strongly. The gold nanoparticles were proved to amplify the SPR detection signals via the coupling of their localized surface plasmon (LSP) with the propagating plasmon on the SPR gold surface. Our results confirmed that the bare SPR gold surface successfully captured the PrPSc from the solution with a LOD of 0.5ng/mL and a linear detection range from 0.5ng/mL to 500ng/mL. Injecting the gold nanoparticles after PrPSc yielded a dramatic enhancement of signal, with a lower LOD of 0.001ng/mL and a linear detection range from 0.001ng/mL to 10ng/mL. The gold nanoparticles permitted 4 to 322-fold increase of the signals. The required detection time was controlled in 15 min. PrPC, cys-protein G and their mixtures with PrPSc, were also detected via this sandwich SPR detection assay. Atomic force microscope (AFM) was used to evaluate the surface morphology of the SPR gold substrate after the detection. All the obtained results suggested that this novel SPR sandwich detection assay in our work was efficient, sensitive and specific for the detection of trace PrPSc

Thermally treated bare gold nanoparticles for colorimetric sensing of copper ions

2014 ◽  
Vol 181 (9-10) ◽  
pp. 911-916 ◽  
Author(s):  
Hao-Hua Deng ◽  
Guang-Wen Li ◽  
Ai-Lin Liu ◽  
Wei Chen ◽  
Xin-Hua Lin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Copper Ions ◽  
Colorimetric Sensing ◽  
Bare Gold ◽  
Thermally Treated

SERS detection of polycyclic aromatic hydrocarbons using a bare gold nanoparticles coupled film system

The Analyst ◽  
2016 ◽  
Vol 141 (14) ◽  
pp. 4359-4365 ◽  
Author(s):  
Hai-Xin Gu ◽  
Kai Hu ◽  
Da-Wei Li ◽  
Yi-Tao Long
Keyword(s):  
Gold Nanoparticles ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Sers Substrate ◽  
Film System ◽  
System P ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Polycyclic Aromatic ◽  
Bare Gold

A facile approach based on a bare gold nanoparticles (Au NPs) coupled film system as the surface-enhanced Raman scattering (SERS) substrate was developed for the effective detection of polycyclic aromatic hydrocarbons (PAHs).

Characterization of stainless steel assisted bare gold nanoparticles and their analytical potential

Talanta ◽  
2014 ◽  
Vol 118 ◽  
pp. 321-327 ◽  
Author(s):  
A.I. López-Lorente ◽  
B.M. Simonet ◽  
M. Valcárcel ◽  
S. Eppler ◽  
R. Schindl ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Stainless Steel ◽  
Analytical Potential ◽  
Bare Gold
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