35 Result(s)
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English
Chemistry
Analytical Chemistry
Characterization and Evaluation of Materials
Wentao **a
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Article
Novel Method for Spectrophotometric Determination of L-Tryptophan in the Enzymatic Resolution of DL-N-Acetyl-Tryptophan
A novel spectrophotometric method for the determination of tryptophan (Trp) has been proposed. The sensitive and simple method was based upon the finding that NaNO2 and Trp formed a diazotized product in nitric a...
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Article
Molecular imprinting in ionic liquid-modified porous polymer for recognitive separation of three tanshinones from Salvia miltiorrhiza Bunge
Five ionic liquid-modified porous polymers with different imidazolium-based functional groups were obtained. A molecular imprinting technique was introduced to form the ordered functional groups in the porous ...
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Article
Quantitative profiling of tryptophan metabolites in serum, urine, and cell culture supernatants by liquid chromatography–tandem mass spectrometry
A sensitive, selective, and comprehensive method for the quantitative determination of tryptophan and 18 of its key metabolites in serum, urine, and cell culture supernatants was developed. The analytes were s...
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A SERS-based immunoassay for porcine circovirus type 2 using multi-branched gold nanoparticles
We report on a facile immunoassay for porcine circovirus type 2 (PCV2) based on surface enhanced Raman scattering (SERS) using multi-branched gold nanoparticles (mb-AuNPs) as substrates. The mb-AuNPs in the im...
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Article
Efficient carbon dioxide electrolysis based on ceria cathode loaded with metal catalysts
Fluorite-type heterogeneous catalyst ceria is a mixed conductor and widely used as a hydrocarbon-fueled solid oxide fuel cell anode because of its advantage of anti-carbon deposition, redox stability, and ther...
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Article
Colorimetric and visual determination of total nereistoxin-related insecticides by exploiting a nereistoxin-driven aggregation of gold nanoparticles
We describe a method for the visual and colorimetric determination of total nereistoxin-related insecticide residues. It is based on the nereistoxin-induced aggregation of gold nanoparticles (AuNPs). The nerei...
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Article
Fluorescence aggregation assay for the protein biomarker mucin 1 using carbon dot-labeled antibodies and aptamers
We have developed a sensitive fluorescence assay for the protein biomarker mucin 1 (MUC1). It is based on the aggregation of functionalized carbon dots (CDs) in the presence of MUC1. The CDs with a size of ~2 ...
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Synthesis of a graphitic carbon nitride nanocomposite with magnetite as a sorbent for solid phase extraction of phenolic acids
We have developed a facile in-situ growth method for the deposition of magnetite (Fe3O4) particles on the surface of a graphitic carbon nitride (g-C3N4) nanosheet. The material was characterized by X-ray diffract...
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Article
Dual signal amplification strategy for amperometric aptasensing using hydroxyapatite nanoparticles. Application to the sensitive detection of the cancer biomarker platelet-derived growth factor BB
The authors describe a dual signal amplification strategy for improving the sensitivity of electrochemical aptasensor. Hydroxyapatite nanoparticles (HAP-NPs) serve as the support for deposition of the respecti...
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Article
Sensitive immunosensing of the carcinoembryonic antigen utilizing aptamer-based in-situ formation of a redox-active heteropolyacid and rolling circle amplification
A highly sensitive electrochemical scheme for the detection of the cancer biomarker carcinoembryonic antigen (CEA) is reported. An aptamer-based formation of redox-active molybdophosphate is combined with roll...
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Article
Layered vanadium(IV) disulfide nanosheets as a peroxidase-like nanozyme for colorimetric detection of glucose
The authors have discovered that vanadium disulfide (VS2) nanosheets, synthesized by a hydrothermal method, exert stable peroxidase-like activity. The catalytic activity, with H2O2 as a cosubstrate, follows Micha...
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Article
Fluorometric determination of dopamine by using molybdenum disulfide quantum dots
A method is described for the rapid fluorometric determination of dopamine (DA) by using molybdenum disulfide quantum dots (MoS2 QDs) that were fabricated via an ammonium hydroxide etching method. The probe has a...
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Article
Highly sensitive detection of a small molecule by a paired labels recognition system based lateral flow assay
Small molecules are difficult to detect by conventional gold lateral flow assay (GLFA) sensitively because the test system must satisfy the conflict requirements between enough signal intensity and limited ant...
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Article
In-situ construction of NiCo2O4 nanoarrays on La0.8Sr0.2MnO3-δ electrodes for intermediate temperature solid oxide fuel cells
Novel NiCo2O4 nanoarrays have been in-situ grown on a La0.8Sr0.2MnO3-δ(LSM) cathode through a hydrothermal method, which presents the enhanced electrochemical performances of the LSM cathode for the intermediate ...
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Article
Nanozyme Enhanced Colorimetric Immunoassay for Naked-Eye Detection of Salmonella Enteritidis
Salmonella Enteritidis is a major public health threat of global proportions, while it is still a serious challenge to develop point-of-care detection assay. In this study, nanozymes (Fe-MOF nanoparticles) were s...
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Colorimetric detection and ty** of E. coli lipopolysaccharides based on a dual aptamer-functionalized gold nanoparticle probe
A rapid method for identification and ty** of lipopolysaccharides (LPS) was developed by utilizing the different binding affinities between two kinds of gold nanoparticles (AuNPs) functionalized with two apt...
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Article
Rapid and selective fluorometric determination of tannic acid using MoO3-x quantum dots
The authors describe a fluorometric method for the quantification of tannic acid (TA). MoO3-x quantum dots (QDs) can selectively capture TA via the formation of an organic molybdate complex. This causes an electr...
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Article
Characterization and analysis of non-ionic surfactants by supercritical fluid chromatography combined with ion mobility spectrometry-mass spectrometry
Comprehensive separation and analysis of non-ionic surfactants have been conducted by coupling supercritical fluid chromatography (SFC) with ion mobility spectrometry-mass spectrometry (IMS-MS). Representative...
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Article
Signal amplification in immunoassays by using noble metal nanoparticles: a review
This review (with 147 references) summarizes the state of the art in methods for signal amplification in immunoassays by using noble metal nanoparticles (MeNPs). Following an introduction into the field, a fir...
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Article
A colorimetric zinc(II) assay based on the use of hairpin DNAzyme recycling and a hemin/G-quadruplex lighted DNA nanoladder
A method is described for sensitive colorimetric determination of zinc(II) ions that uses (a) a Zn(II)-responsive hairpin DNAzyme that assists target recycling, (b) hybridization chain reaction, and (c) hemin/...
