Designed self-assembled hybrid Au@CdS core–shell nanoparticles with negative charge and their application as highly selective biosensors

Zhang, Wuxiang; Zheng, Jianzhong; Tan, C.Y.; Lin, Xuan; Hu, Shirong; Chen, Jianhua; You, Xiu-Li; Li, Shunxing

doi:10.1039/c4tb01713g

Cited by 49 publications

(30 citation statements)

References 88 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5A), with linear regression equations of I pa (mA) = À0.165C (mM) À 3.226 (R 1 = 0.9981) and I pa (mA) = À0.0333C (mM) À 6.4587 (R 2 = 0.9975). 4 Therefore, the rGON film not only could effectively repel the interference from the anionic electroactive substances (AA and UA), but could attract the positively charged DA analyte by electrostatic interactions and ion-exchange effects, which consequently improve the selectivity towards DA 37 detection. 22 Furthermore, specificity is another important factor to evaluate a biosensor.…”

Section: Calibration Plot and Limit Of Detectionmentioning

confidence: 99%

“…1 Therefore, the rapid, low cost and effective detection of dopamine is very important in biological systems and meaningful for the routine diagnosis and analysis of neurological disorders. Hence, there are several works which report using modified nanomaterials such as metal nanoparticles, 4 quantum dots, 5 metal oxides, 6,7 carbon materials, 8,9 and conducting polymers 10,11 to improve the sensitivity, selectivity and stability of the modified electrode. Among them, the electrochemical method for the determination of DA has been developed as a promising technique and has attracted much more attention owing to its high sensitivity and selectivity, operation simplicity, rapid response and low instrumental expenses.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fabrication of metal–organic single crystalline nanowires and reduced graphene oxide enhancement for an ultrasensitive electrochemical biosensor

et al. 2015

Self Cite

View full text Add to dashboard Cite

A novel strategy is first presented here to design and construct a good selective and highly sensitive dopamine (DA) biosensor based on single-crystalline CuPc nanowires with a reduced graphene oxide-Nafion film (rGON/CuPcNWs). Metal-organic semiconductor single-crystalline CuPc nanowires with excellent electronic properties and large surface-to-volume ratios were prepared using a physical vapor transport technique and modified onto a glassy carbon electrode (GCE), and exhibited high electrocatalytic activity for DA detection by immobilizing it onto a GCE with a film of the rGON composite. The introduction of a rGO-Nafion film can significantly improve the electrochemical signal of the CuPcNWs. The relevant detection limit toward dopamine is 0.3 nM with a wide linear range from 0.001 mM to 200 mM. The results of the demonstrated biosensor could provide important enlightenment for the design of more sensitive electrochemical biosensors.

show abstract

Section: Calibration Plot and Limit Of Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of metal–organic single crystalline nanowires and reduced graphene oxide enhancement for an ultrasensitive electrochemical biosensor

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The development of hierarchical nanomaterials with controllable composition and morphology has provided new opportunities to tune physical/chemical properties, making them promising candidates for both fundamental studies and practical applications . Recently, numerous types of nanomaterials with complex nanostructures (NCSs), such as core–shell, yolk–shell, multishell, and open‐cage/frame architectures, have attracted considerable interests because of their intrinsic properties and potential applications in diverse fields . Prussian blue analogs (PBAs), a subclass of the metal–organic frameworks, are a new platform for the synthesis of NCSs .…”

Section: Introductionmentioning

confidence: 99%

Core–Shell Prussian Blue Analogs with Compositional Heterogeneity and Open Cages for Oxygen Evolution Reaction

et al. 2019

Self Cite

View full text Add to dashboard Cite

Here, a reduction‐cation exchange (RCE) strategy is proposed for synthesizing Fe–Co based bimetallic Prussian blue analogs (PBAs) with heterogeneous composition distribution and open cage nanocage architecture. Specially, bivalent cobalt is introduced into a potassium ferricyanide solution containing hydrochloric acid and polyvinyl pyrrolidone. The uniform PBAs with opened cages are formed tardily after hydrothermal reaction. Time‐dependent evolution characterization on composition elucidating the RCE mechanism is based on the sequential reduction of ferric iron and cation exchange reaction between divalent iron and cobalt. The PBA structures are confirmed by electron tomography technology, and the heterogeneous element distribution is verified by energy‐dispersive X‐ray spectroscopy elemental analysis, leading to the formation of core–shell PBAs with compositional heterogeneity (Fe rich shell and Co rich core) and open cage architecture. When the PBA catalysts are used to boost the oxygen evolution reaction (OER), superior OER activity and long‐term stability (low overpotential of 271 mV at 10 mA cm −2 and ≈5.3% potential increase for 24 h) are achieved, which is attributed to the unique compositional and structural properties as well as high special surface areas (576.2 m 2 g −1 ). The strategies offer insights for developing PBAs with compositional and structural multiplicity, which encourages more practical catalytic applications.

show abstract

“…As a new functional group of porous and crystalline materials, metal organic frameworks (MOFs) represent versatile applications as a gas sensor, heterogeneous catalysis, a proton conductor, etc. [1][2][3][4][5][6]. In this case, the distinct applications, especially as a heterogeneous catalyst, is a consequence of their unique textural properties such as great porosity, crystallinity and thermal stability [7].…”

Section: Introductionmentioning

confidence: 99%

Predominant role of grafted iron(III) Schiff-base complex in oxidation of gaseous and aqueous reactants: A visible light responsive photocatalyst

Tabari

Jamali

2017

Journal of Photochemistry and Photobiology A: Chemistry

View full text Add to dashboard Cite

The visible light response and photocatalytic activities of covalently bonded iron(III)-Schiff base complex is evaluated by photooxidation of nitric oxide under visible light exposure. In addition, this study reports the existing of dominant active sites on the surface of grafted complex toward water adsorption, which leads to the generation of hydroxyl radicals under illumination. Moreover, the morphological analysis exhibits high surface area (575 m 2 /g) with an average pore diameter of 21 nm; in this context, XRD analysis shows that the characteristic peaks of the Schiff-base complex are covered by the amorphous structure of the silica network, however, the microscopic analysis reveals the irregular shape of the grafted catalyst. Furthermore, the catalytic activity was evaluated by photooxidation of reactive blue 13 dye in aqueous solution under ambient light illumination. Also, the reaction variables such as the amount of catalyst, pH value, concentration and temperature of the dye solution were studied and discussed in detail. It seems, the enhanced activity of the photocatalyst toward the dye decolourization is a consequence of its uniform surface, large surface area, fine particles and active surface for the water adsorption.

show abstract

Designed self-assembled hybrid Au@CdS core–shell nanoparticles with negative charge and their application as highly selective biosensors

Abstract: Schematic illustration of the reaction mechanism of Au@CdS core–shell structure with DA in the presence of UA and AA.

Cited by 49 publications

References 88 publications

Fabrication of metal–organic single crystalline nanowires and reduced graphene oxide enhancement for an ultrasensitive electrochemical biosensor

Fabrication of metal–organic single crystalline nanowires and reduced graphene oxide enhancement for an ultrasensitive electrochemical biosensor

Core–Shell Prussian Blue Analogs with Compositional Heterogeneity and Open Cages for Oxygen Evolution Reaction

Predominant role of grafted iron(III) Schiff-base complex in oxidation of gaseous and aqueous reactants: A visible light responsive photocatalyst

Contact Info

Product

Resources

About