Nanocatalytic resonance scattering spectral analysis

Jiang, Zhiliang; Li, Jishun; Wen, Guiqing; Liu, QingYe

doi:10.1007/s11426-010-0060-9

Cited by 13 publications

(10 citation statements)

References 48 publications

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“…25 Considering the surface plasmon resonances (SPR) absorption of gold nanoparticles, 26 there is a growing interest in the use of gold nanoparticles/biomolecule conjugations as the RLS probes for the analytical purpose. 27 Taking Jiang et al 28 as examples, they developed a series of resonance light scattering spectral immunoassay for protein based on the catalytic effect of antibody attached Au NPs, such as microalbumin, 29 30 complement component 3, 31 and apolipoprotein AI and B. 32 In their experiments, gold nanoparticles were coupled to antibody by physical adsorption.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Resonance Light Scattering of Antibody Covalently Conjugated Gold Nanoparticles Due to Antigen-Antibody Interaction Induced Aggregation

Weng¹,

Li²,

Zhao³

2013

nanosci nanotechnol lett

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Antibody coated nanoparticles have been used extensively in optical immunoassay for detecting various proteins. However, in most cases, the strategies for preparing antibody attached nanoparticles were based on physical adsorption, which is adverse to promote the detection limit and sensitivity of optical immunoassay. In this paper, antibody was covalently conjugated to gold nanospheres using a long chain alkanethiol: 16-mercaptohexadecanoic acid (16-MHDA). 16-MHDA modified gold nanoparticles were more stable and easier to conjugate antibody. Characterized results confirmed that antibody was covalently coated on the surface of gold nanoparticles. Owing to antigen-antibody interaction, the fabricated gold nanoparticles/antibody bioconjugates produced specific aggregation in the presence of antigen, which enhanced the resonance light scattering intensity. The enhanced intensity was highly sensitive to the concentration of antigen. The results suggested that such bioconjugates had great potential in detecting proteins using resonance light scattering with high sensitivity.

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Section: Introductionmentioning

confidence: 99%

Enhanced Resonance Light Scattering of Antibody Covalently Conjugated Gold Nanoparticles Due to Antigen-Antibody Interaction Induced Aggregation

Weng¹,

Li²,

Zhao³

2013

nanosci nanotechnol lett

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“…The absorbance of the three peaks was linearly increased with AgNPB concentration increased. The study of RRS spectra of nanoparticles in liquid phase shown that, their RRS peaks are closely related with the emission intensity of light source and the SPR absorption peaks 56 57 . The light source of model F-7000 Hitachi fluorescence spectrometer has the strongest emission wavelength at 280 nm that cause a scattering peak at 280 nm, and the emission intensity weaken as the increase of the wavelength.…”

Section: Discussionmentioning

confidence: 99%

Autocatalytic Oxidization of Nanosilver and Its Application to Spectral Analysis

Wen

Luo

Liang

2014

Sci Rep

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The stable yellow nanosilver (AgNP) and blue nanosilver (AgNPB) sols were prepared by the NaBH4 procedure. The new nanocatalytic reaction of AgNP-NaCl-H2O2 was investigated by surface plasmon resonance (SPR) absorption, resonance Rayleigh scattering (RRS), surface-enhanced Raman scattering (SERS) and scanning electron microscope (SEM) techniques. The autocatalytic oxidization of Ag on AgNP surface by H2O2 was observed firstly and the AgNP/AgCl nanoparticles were characterized. The [Ag+] from AgNP is different to the Ag+ from AgNO3 that adsorb on the AgNP surface. An autocatalytic oxidization mechanism was proposed to explain experimental phenomena. The relationship between the SPR absorption peaks and the RRS peaks of AgNPB was studied, and three characteristic RRS peaks called as out-of-plane quadrupole, out-of-plane dipole and in-plane dipole RRS peaks were observed firstly. Using AgNP as nanoprobe, a simple, sensitive and selective RRS method was developed for assay of H2O2 in the range of 2.0 × 10−8-8.0 × 10−5 mol/L.

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“…Resonance Rayleigh scattering (or resonance scattering, RS) spectral method is simple, convenient, and sensitive. It has been applied in the analysis of trace inorganic ions such as Hg(II), Cd(II), Pb(II), Mo(VI), and Cr(VI) metal ions, and organic compounds [13][14][15][16][17][18]. Based on the catalytic effect of inorganic metal ions, a catalytic RSS method has been proposed for Se [19].…”

Section: Introductionmentioning

confidence: 99%

A Simple and Selective Nanocatalytic Resonance Rayleigh Scattering Spectral Method for the Determination of Trace Re

Wang

Wen

et al. 2013

Journal of Spectroscopy

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In the HCl medium, rhenium (VII) or Re nanoparticles exhibited strong catalytic effect on the slow Te particle reaction between Te(VI) and Sn(II) at 70°C. The product of formed Te particles shows two strong resonance Rayleigh scattering peaks at 778 nm and 540 nm. The RS intensity at 778 nm enhanced linearly with Re concentration. The enhanced RS intensity was linear Re concentration in the range of 0.01–2.0 nmol·L−1, with a detection limit of 0.005 nmol·L−1Re. This method was applied to the analysis of Re in ore sample, and the results were in agreement with that of the spectrophotometry.

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Nanocatalytic resonance scattering spectral analysis

Cited by 13 publications

References 48 publications

Enhanced Resonance Light Scattering of Antibody Covalently Conjugated Gold Nanoparticles Due to Antigen-Antibody Interaction Induced Aggregation

Enhanced Resonance Light Scattering of Antibody Covalently Conjugated Gold Nanoparticles Due to Antigen-Antibody Interaction Induced Aggregation

Autocatalytic Oxidization of Nanosilver and Its Application to Spectral Analysis

A Simple and Selective Nanocatalytic Resonance Rayleigh Scattering Spectral Method for the Determination of Trace Re

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