Electrochemical sensing platform based on covalent organic framework materials and gold nanoparticles for high sensitivity determination of theophylline and caffeine

Guan, Qixia; Guo, Hao; Xue, Rui; Wang, Mingyue; Wu, Ning; Cao, Yujuan; Zhao, Xin; Yang, Wu

doi:10.1007/s00604-021-04744-x

Cited by 29 publications

(13 citation statements)

References 40 publications

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“…The resulting modified electrode provided excellent electrochemical activity for the simultaneous detection of dopamine and uric acid. Another example of the combination of COF and AuNPs is described by Yang et al [90]. In this work, the condensation between 1,3,6,8-tetra(4formyl phenyl) pyrene (TFPPy) and 2,6-diaminopyridine yield the new DP-Py COF with an unusual wavy topology.…”

Section: Cofs With Metal Nanoparticles And/or Carbon Materialsmentioning

confidence: 70%

Electrochemical (Bio)Sensors Based on Covalent Organic Frameworks (COFs)

Martínez‐Periñán

Martínez-Fernández

Segura

et al. 2022

Sensors

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Covalent organic frameworks (COFs) are defined as crystalline organic polymers with programmable topological architectures using properly predesigned building blocks precursors. Since the development of the first COF in 2005, many works are emerging using this kind of material for different applications, such as the development of electrochemical sensors and biosensors. COF shows superb characteristics, such as tuneable pore size and structure, permanent porosity, high surface area, thermal stability, and low density. Apart from these special properties, COF’s electrochemical behaviour can be modulated using electroactive building blocks. Furthermore, the great variety of functional groups that can be inserted in their structures makes them interesting materials to be conjugated with biological recognition elements, such as antibodies, enzymes, DNA probe, aptamer, etc. Moreover, the possibility of linking them with other special nanomaterials opens a wide range of possibilities to develop new electrochemical sensors and biosensors.

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Section: Cofs With Metal Nanoparticles And/or Carbon Materialsmentioning

confidence: 70%

Electrochemical (Bio)Sensors Based on Covalent Organic Frameworks (COFs)

Martínez‐Periñán

Martínez-Fernández

Segura

et al. 2022

Sensors

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“…In addition, Anastasiadi et al [ 53 ] concluded that in a BR buffer solution at a higher pH value of 8, a larger background current occurs due to the discharge of the electrolyte. Guan et al [ 68 ] showed that the peak potential of CF remained unchanged with the increasing pH of PBS, indicating that protons were not included in the oxidation process.…”

Section: Discussionmentioning

confidence: 99%

“…Depending on the type of sensor used, the researchers had different conclusions. Geto and Brett [ 55 ], Guan et al [ 68 ], Jose et al [ 57 ], and Monteiro et al [ 93 ] noticed a linear relationship between the peak current (I p ) and the square root of the scan rate (v 1/2 ), indicating a diffusion-controlled process. On the other hand, Horst et al [ 62 ] and Varsha et al [ 21 ] observed a linear relationship between the peak current (I p ) and the scan rate (v), suggesting that the process is adsorption-controlled.…”

Section: Discussionmentioning

confidence: 99%

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Recent Advances in Electrochemical Sensors for Caffeine Determination

Tasić

Mihajlović

Simonović

et al. 2022

Sensors

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The determination of target analytes at very low concentrations is important for various fields such as the pharmaceutical industry, environmental protection, and the food industry. Caffeine, as a natural alkaloid, is widely consumed in various beverages and medicines. Apart from the beneficial effects for which it is used, caffeine also has negative effects, and for these reasons it is very important to determine its concentration in different mediums. Among numerous analytical techniques, electrochemical methods with appropriate sensors occupy a special place since they are efficient, fast, and entail relatively easy preparation and measurements. Electrochemical sensors based on carbon materials are very common in this type of research because they are cost-effective, have a wide potential range, and possess relative electrochemical inertness and electrocatalytic activity in various redox reactions. Additionally, these types of sensors could be modified to improve their analytical performances. The data available in the literature on the development and modification of electrochemical sensors for the determination of caffeine are summarized and discussed in this review.

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“…Recently, many researchers have begun to focus on the chemical enhancement mechanism of SERS. − The charge transfer (CT) enhancement related with semiconductor materials is used in these studies. − Because intermolecular interactions can alter the electron density distribution and the Raman scattering cross section, SERS would improve the different Raman vibration modes of probe molecules and detection specificity. − In previous studies, the CT and EM mechanisms were often discussed separately. There has been a lack of effective methodology for combining the two mechanisms into a single-material system to design the most efficient SERS substrate.…”

Section: Introductionmentioning

confidence: 99%

Si/TiO₂/Ag Multistorey Structures with Interfacial Charge Transfer for a Recyclable Surface-Enhanced Raman Scattering Substrate

Cai

Wang

Jia

et al. 2022

ACS Appl. Mater. Interfaces

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In this work, highly ordered TiO2/Ag bilayer structures on p-type silicon (Si) wafers are prepared by photolithography and electrochemical self-assembly methods. The interfacial charge transfer (CT) of this Si/TiO2/Ag multistorey structure with a specially aligned work function is studied. This is important to deduce the interfacial electron migration behavior of SERS. The three-dimensional finite-difference time-domain (3D FDTD) simulation is used to explore the combined CT–EM enhancement mechanism. The result shows that the electron movement under the CT mechanism can induce the resonance effect of free electrons to further improve EM performance. In addition, the effect of agglomerated Ag nanoparticle size distribution on the SERS property and the self-cleaning property of Si/TiO2/Ag multistorey structures is investigated. Finally, this unique structure of highly ordered Si/TiO2/Ag SERS substrate shows superior sensitivity, reproducibility, and stability. Rhodamine 6G (R6G) with trace concentrations as low as 10–15 M can be detected, and the EF is estimated to be about 8.9 × 1013. The relative standard deviation (RSD) at 1511 cm–1 is about 4.7%. These results are very promising for the practical application of the SERS technique in the rapid trace determination in many fields.

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Electrochemical sensing platform based on covalent organic framework materials and gold nanoparticles for high sensitivity determination of theophylline and caffeine

Cited by 29 publications

References 40 publications

Electrochemical (Bio)Sensors Based on Covalent Organic Frameworks (COFs)

Electrochemical (Bio)Sensors Based on Covalent Organic Frameworks (COFs)

Recent Advances in Electrochemical Sensors for Caffeine Determination

Si/TiO₂/Ag Multistorey Structures with Interfacial Charge Transfer for a Recyclable Surface-Enhanced Raman Scattering Substrate

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Electrochemical sensing platform based on covalent organic framework materials and gold nanoparticles for high sensitivity determination of theophylline and caffeine

Cited by 29 publications

References 40 publications

Electrochemical (Bio)Sensors Based on Covalent Organic Frameworks (COFs)

Electrochemical (Bio)Sensors Based on Covalent Organic Frameworks (COFs)

Recent Advances in Electrochemical Sensors for Caffeine Determination

Si/TiO2/Ag Multistorey Structures with Interfacial Charge Transfer for a Recyclable Surface-Enhanced Raman Scattering Substrate

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Product

Resources

About

Si/TiO₂/Ag Multistorey Structures with Interfacial Charge Transfer for a Recyclable Surface-Enhanced Raman Scattering Substrate