Electrochemical enantiorecognition of tryptophan enantiomers based on graphene quantum dots–chitosan composite film

Ou, Jie; Tao, Yongxin; Xue, Jingjing; Kong, Yong; Dai, Jiangying; Deng, Linhong

doi:10.1016/j.elecom.2015.04.004

Cited by 95 publications

(31 citation statements)

References 20 publications

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“…Recently, Trojanowicz [7] reported that combination of multi-walled carbon nanotubes (CNTs) and optically active substances can achieve recognition of chiral compounds, suggesting the feasibility of GQDs-based enantiorecognition because both GQDs and CNTs are carbon nanomaterials. Another recent work by our group also verified the possibility of GQDs-based chiral recognition, in which Trp isomers were recognized by the nanocomposites of GQDs and chitosan, a natural polysaccharide having plenty of chiral centers [8].…”

Section: Introductionmentioning

confidence: 80%

Graphene quantum dots/β-cyclodextrin nanocomposites: A novel electrochemical chiral interface for tryptophan isomer recognition

Zhu

Kong

et al. 2015

Electrochemistry Communications

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Section: Introductionmentioning

confidence: 80%

Graphene quantum dots/β-cyclodextrin nanocomposites: A novel electrochemical chiral interface for tryptophan isomer recognition

Zhu

Kong

et al. 2015

Electrochemistry Communications

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“…Researchers demonstrated that the crystal density of generated GNPs increases by shifting toward negative electrodeposition potentials from 0.3 to -0.3 V on an ITO electrode, because of the increase in nucleation rate when oversaturation occurs at higher overpotentials. 44 The reduction of AuCl4initiates at 0.15 V, leading to full nucleation at E = 0.20 V, therefore, the potential was adjusted on E = 0 V where no reaction occurs. 44 For electrodeposition of gold nanoseeds on the surface of GCE pre-modified by P-Cys-GQDs, the electrodeposition of metallic gold ions by chronoamperometry technique was carried out in the cell containing a triple solution of 20 mM HAuCl4, 500 mM H2SO4 and 50 mM arginine.…”

Section: Electrodeposition Of Gnps On the Surface Of P-cys-gqd Modifimentioning

confidence: 99%

Non-enzymatic Determination of L-Proline Amino Acid in Unprocessed Human Plasma Sample Using Hybrid of Graphene Quantum Dots Decorated with Gold Nanoparticles and Poly Cysteine: A Novel Signal Amplification Strategy

2018

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An innovative electrochemical interface for quantitation of L-proline (L-Pro) based on ternary amplification strategy was fabricated. In this work, gold nanoparticles prepared by soft template methodology were immobilized onto green and biocompatible nanocomposite containing poly as a conductive matrix and graphene quantum dots as the amplification element. Therefore, a novel multilayer film based on poly-L-cysteine, graphene quantum dots (GQDs), and gold nanoparticles (GNPs) was exploited to develop a highly sensitive electrochemical sensor for the detection of L-Pro. Fully electrochemical methodology was used to prepare a new transducer on a glassy carbon electrode, which provided a high surface area towards sensitive detection of L-Pro. The prepared electrode was employed for the detection of L-Pro. Under optimized conditions, the calibration curve for L-Pro concentration was linear in 0.5 nM - 10 mM with a low limit of quantification of 0.1 nM. The practical analytical utility of the modified electrode was illustrated by determination of L-Pro in unprocessed human plasma samples.

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“…Although these methods are routinely used for accurate determination, they still suffer from some drawbacks such as long response time, high instrument cost, and sophisticated operation procedure. On the other hand, the electrochemical approach can be considered as an alternative method for enantiorecognition due to its high sensitivity, fast response, and low cost [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

β-Cyclodextrin-Immobilized Ni/Graphene Electrode for Electrochemical Enantiorecognition of Phenylalanine

et al. 2020

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In this work, a Ni/graphene (Ni/G) electrode was designed and fabricated by plasma-enhanced chemical vapor deposition (PECVD) for the ultrasensitive recognition of d-and l-phenylalanine. Through a single-step PECVD process, the Ni/G electrode can achieve better hydrophilicity and larger catalytic surface area, which is beneficial for the electrochemical recognition of bio-objects. After surface modification with β-cyclodextrin, the Ni/G electrode can distinguish d-phenylalanine from l-phenylalanine according to a 0.09 V peak shift in differential pulse voltammetry tests. Moreover, this Ni/G electrode achieved a detection limit as low as 1 nM and a wide linear range from 1 nM to 10 mM toward l-phenylalanine, with great storage stability and working stability.

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Electrochemical enantiorecognition of tryptophan enantiomers based on graphene quantum dots–chitosan composite film

Cited by 95 publications

References 20 publications

Graphene quantum dots/β-cyclodextrin nanocomposites: A novel electrochemical chiral interface for tryptophan isomer recognition

Graphene quantum dots/β-cyclodextrin nanocomposites: A novel electrochemical chiral interface for tryptophan isomer recognition

Non-enzymatic Determination of L-Proline Amino Acid in Unprocessed Human Plasma Sample Using Hybrid of Graphene Quantum Dots Decorated with Gold Nanoparticles and Poly Cysteine: A Novel Signal Amplification Strategy

β-Cyclodextrin-Immobilized Ni/Graphene Electrode for Electrochemical Enantiorecognition of Phenylalanine

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