A “signal-on” photoelectrochemical aptasensor based on graphene quantum dots-sensitized TiO2 nanotube arrays for sensitive detection of chloramphenicol

Qin, Xiaofei; Wang, Qianqian; Geng, Liping; Shu, Xiaoli; Wang, Yan

doi:10.1016/j.talanta.2018.12.103

Cited by 79 publications

(19 citation statements)

References 36 publications

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“…In the latter case, QDs mostly consist of carbon nanomaterials: QDs do not worsen the electroconductivity of the surface layer but improve the surface density of the aptamers on the electrode interface and, hence, increase the signal-to-noise ratio by partial suppression of undesired adsorption of interferences. It seems obvious that the use of QDs was inspired by the undoubted advantages of their applications in optical sensing systems including photochemical sensors [ 197 , 239 , 249 , 256 , 259 ]. More common CdS QDs are also used as passive carriers for aptamers [ 208 ] or sources of Cd ion detection using DPV [ 181 , 182 , 198 ].…”

Section: Electrochemical Aptasensors For Antibiotic Detectionmentioning

confidence: 99%

Electrochemical Aptasensors for Antibiotics Detection: Recent Achievements and Applications for Monitoring Food Safety

Evtugyn

Porfireva

Tsekenis

et al. 2022

Sensors

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Antibiotics are often used in human and veterinary medicine for the treatment of bacterial diseases. However, extensive use of antibiotics in agriculture can result in the contamination of common food staples such as milk. Consumption of contaminated products can cause serious illness and a rise in antibiotic resistance. Conventional methods of antibiotics detection such are microbiological assays chromatographic and mass spectroscopy methods are sensitive; however, they require qualified personnel, expensive instruments, and sample pretreatment. Biosensor technology can overcome these drawbacks. This review is focused on the recent achievements in the electrochemical biosensors based on nucleic acid aptamers for antibiotic detection. A brief explanation of conventional methods of antibiotic detection is also provided. The methods of the aptamer selection are explained, together with the approach used for the improvement of aptamer affinity by post-SELEX modification and computer modeling. The substantial focus of this review is on the explanation of the principles of the electrochemical detection of antibiotics by aptasensors and on recent achievements in the development of electrochemical aptasensors. The current trends and problems in practical applications of aptasensors are also discussed.

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Section: Electrochemical Aptasensors For Antibiotic Detectionmentioning

confidence: 99%

Electrochemical Aptasensors for Antibiotics Detection: Recent Achievements and Applications for Monitoring Food Safety

Evtugyn

Porfireva

Tsekenis

et al. 2022

Sensors

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show abstract

“…The PEC sensors developed in the last five years for chloramphenicol (CAP) sensing have been classified. [111][112][113][114][115][116][117][118] Among the diverse strategies used, biocatalytic precipitation (BCP) has attracted a great deal of attention due to its simplicity and convenience. The insoluble precipitate formed in-situ on the electrode surface can efficiently block the electron transfer, and the photocurrent signal decreases accordingly.…”

Section: Antibioticsmentioning

confidence: 99%

Research progress on photoelectrochemical sensors for contamination analysis in agricultural fields

et al. 2022

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The establishment of rapid and efficient contamination detection methods in agricultural fields is of great significance for safeguarding agricultural production and human health, and for ensuring the healthy development of agricultural industries. As a booming analytical method, photoelectrochemical (PEC) sensors, which combine the advantages of electrochemical analysis and optical analysis, have received increasing research attention. Due to the complete separation of the excitation source (light) and the detection signal (current), the background signal of PEC sensors is greatly decreased, and their sensitivity is high. This review aims to cover the advances in PEC sensors for contamination analysis in agricultural fields over the past five years, including analysis of heavy metals, antibiotics, pesticides, and toxins. The future prospects in this field are also discussed.

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“…All of these methods show satisfactory results for determining this compound. However, the research for the development of novel analytical methods, aiming advantages such as simplicity, practicality, good sensitivity, selectivity and speed in analysis has been the focus of many researcher groups [15,16]. In this context, photoelectrochemical methods (PEC) have stood out intensely in recent years [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…However, the research for the development of novel analytical methods, aiming advantages such as simplicity, practicality, good sensitivity, selectivity and speed in analysis has been the focus of many researcher groups [15,16]. In this context, photoelectrochemical methods (PEC) have stood out intensely in recent years [15][16][17][18]. PEC methods are based on electron transfer between the analyte and a semiconductor surface under a light irradiation generating electron (e À )/hole (h + ) pairs [15,17,18].…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Sensor for Isoniazid: Application in Drugs Used in the Treatment of Tuberculosis

et al. 2021

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The present work describes the development of a photoelectrochemical sensor based on titanium dioxide, cadmium telluride quantum dots and the tris (2,2′‐bipyridyl) ruthenium(II) chloride complex for detection of Isoniazid (INH). The Ru(bpy)32+/CdTe‐QDs/TiO2/FTO photoelectrochemical platform was characterized by scanning electrochemical microscopy, electrochemical impedance spectroscopy and amperometry. The photoelectrochemical sensor presented two linear ranges for INH concentrations ranging from 0.5 to 150 μmol L−1 and 150 to 1270 μmol L−1, with a theoretical detection limit of 0.02 μmol L−1. The sensor was successfully applied for the determination of INH in drugs samples used in the treatment of tuberculosis.

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A “signal-on” photoelectrochemical aptasensor based on graphene quantum dots-sensitized TiO2 nanotube arrays for sensitive detection of chloramphenicol

Cited by 79 publications

References 36 publications

Electrochemical Aptasensors for Antibiotics Detection: Recent Achievements and Applications for Monitoring Food Safety

Electrochemical Aptasensors for Antibiotics Detection: Recent Achievements and Applications for Monitoring Food Safety

Research progress on photoelectrochemical sensors for contamination analysis in agricultural fields

Photoelectrochemical Sensor for Isoniazid: Application in Drugs Used in the Treatment of Tuberculosis

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