Search results for: Chaogui Chen

Items from 1 to 12 out of 12 results

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Efficient scavenging of uranium (VI) using porous hexagonal boron nitride by a combined process of surface adsorption and induced precipitation crystallization

Li Li, Yin Zhao, Yang Jin, Wensheng Linghu, more

Journal of Radioanalytical and Nuclear Chemistry > 2019 > 321 > 3 > 1035-1044

An ammonium/hydroxyl-enriched p-BN microrods were synthesized and the adsorption behavior of uranyl on p-BN was systematically studied. The adsorption kinetic and isotherm studies revealed the adsorption behavior is independent on electrostatic attraction or chemisorption. The results demonstrate uranyl hydrolyzed precipitated crystals are formed on the surface of p-BN at an optimized pH of 2.86 and...

article

Multiplexed bioactive paper based on GO@SiO2@CeO2 nanosheets for a low-cost diagnostics platform

Liu Deng, Chaogui Chen, Chengzhou Zhu, Shaojun Dong, more

Biosensors and Bioelectronics > 2014 > 52 > Complete > 324-329

In this paper, Graphene oxide@SiO ₂ @CeO ₂ hybrid nanosheets (GSCs) have been successfully synthesized by the wet-chemical strategy. TEM, FITR and XPS were applied to characterize the morphology and composition of the nanosheets. The colorimetric assay of these nanosheets indicated that they possessed high intrinsic peroxidase activity, which should be ascribed to the combination of...

article

A novel electrochemical sensing platform for anions based on conducting polymer film modified electrodes integrated on paper-based chips

Baohua Lou, Chaogui Chen, Zhixue Zhou, Lingling Zhang, more

Talanta > 2013 > 105 > C > 40-45

In this paper, conducting polymer film modified electrodes were applied to fabricate paper-based chips (PCs), and different concentrations of chloride ions (Cl⁻) in water can be selectively detected based on the potential response towards Cl⁻. The three-electrode system was screen-printed on paper and the polypyrrole (PPy) film doped with Cl⁻ was electrochemically polymerized on working electrodes...

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Fabrication of a sensor chip containing Au and Ag electrodes and its application for sensitive Hg(II) determination using chronocoulometry

Chaogui Chen, Yan Du, Jing Li, Xiurong Yang, more

Analytica Chimica Acta > 2012 > 738 > Complete > 45-50

In this work, we explored a novel fabrication method to construct Au and Ag electrodes on chip, utilizing the different solubility of gold and silver in different etching solutions. KI-I ₂ etching solution and 50% HNO ₃ were chosen to dissolve the metal layers alternatively. Planar electrodes with gold and silver could be simultaneously and accurately patterned on chip using photolithographic...

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An electrochemical aptasensor for chiral peptide detection using layer-by-layer assembly of polyelectrolyte-methylene blue/polyelectrolyte-graphene multilayer

Haixia Qin, Jiyang Liu, Chaogui Chen, JiaHai Wang, more

Analytica Chimica Acta > 2012 > 712 > Complete > 127-131

Here we demonstrate for the first time that by physically adsorbing aptamer onto conductive film assembled via alternate adsorption of graphene/polyelectrolyte and methylene blue/polyelectrolyte, a label-free electrochemical aptasensor with high sensitivity and selectivity for peptide detection is constructed. Graphene multilayer derived from layer-by-layer assembly has played significant roles in...

article

Microfluidic Electrochemical Aptameric Assay Integrated On-Chip: A Potentially Convenient Sensing Platform for the Amplified and Multiplex Analysis of Small Molecules

Yan Du, Chaogui Chen, Ming Zhou, Shaojun Dong, more

Analytical Chemistry > 2011 > 83 > 5 > 1523 - 1529

article

Au NPs-enhanced surface plasmon resonance for sensitive detection of mercury(II) ions

Li Wang, Tao Li, Yan Du, Chaogui Chen, more

Biosensors and Bioelectronics > 2010 > 25 > 12 > 2622-2626

We reported a sensitive surface plasmon resonance (SPR) sensor for the detection of Hg ²⁺ in aqueous solution by using a thymine (T)-rich, mercury-specific oligonucleotide (MSO) probe and gold nanoparticles (Au NPs)-based signal amplification. The MSO probe was first immobilized on gold film through formation of Au–S bond between DNA and gold film. In the presence of Hg ²⁺ , the MSO...

article

Integrated Self-Powered Microchip Biosensor for Endogenous Biological Cyanide

Liu Deng, Chaogui Chen, Ming Zhou, Shaojun Guo, more

Analytical Chemistry > 2010 > 82 > 10 > 4283 - 4287

article

Layer-by-layer electrochemical biosensor with aptamer-appended active polyelectrolyte multilayer for sensitive protein determination

Yan Du, Chaogui Chen, Bingling Li, Ming Zhou, more

Biosensors and Bioelectronics > 2010 > 25 > 8 > 1902-1907

Herein, we report two simple label-free electrochemical aptasensors for protein detection using layer-by-layer (LBL) self-assembled multilayers with ferrocene-appended poly(ethyleneimine) (Fc-PEI), carbon nanotubes (CNTs) and aptamer. In one sensing strategy, the Fc-PEI, CNTs and DNA aptamer are LBL assembled on the electrode surface via electrostatic interaction. In the presence of target, the aptamer...