β-Cyclodextrin/Fe3O4 hybrid magnetic nano-composite modified glassy carbon electrode for tryptophan sensing

Wang, Haixia; Zhou, Yehong; Guo, Yujing; Liu, Wenjuan; Dong, Chuan; Wu, Yuehuan; Li, Songdong; Shuang, Shaomin

doi:10.1016/j.snb.2012.01.031

Cited by 97 publications

(41 citation statements)

References 37 publications

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“…Therefore, this strategy may implicate great promises for the fabrication of other electrochemical sensors. Au-NPs/GCE DPV 2.5 8.0 × 10 −8 [10] Boron doped diamond nanowire modified silicon substrate DPV 11 5 × 10 −7 [34] PAA modified GC DPV 6 5.2 × 10 −6 [35] ERGO/GCE DPV 6.5 0.1 × 10 −6 [14] MWCNT/CoSal-modified carbon paste electrode DPV 4 1.0 × 10 −7 [36] ß-CD-MNPs/GCE DPV 7 5.0 × 10 −7 [9] CS-CNDs/GCE DPV 9 9.0 × 10 −8 Present work …”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, electrochemical method of determination is less expensive, more convenient, easy in handling, as well as with high sensitivity and selectivity. Several studies have been conducted in this area [8][9][10][11][12][13][14]. The results of such studies have revealed that the voltammetric response of the electrochemical process is not satisfactory due to slow heterogeneous electron transfer on the electrode surface and consequent high overpotentials of the electrochemical oxidation [15,16].…”

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confidence: 99%

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Novel electrochemical sensor based on carbon nanodots/chitosan nanocomposite for the detection of tryptophan

Roushani

Sarabaegi

2015

J IRAN CHEM SOC

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formulations to supplement the current typical diet which is deficient in vegetables. Improper metabolization of Trp may lead to a waste product in the brain or cause hallucination and delusion [3]. Hence, the sensitive and selective determination of Trp is highly essential. Several methods have been reported for the determination of Trp in biological and pharmaceutical samples such as high-performance liquid chromatography [4], spectrophotometry [5], fluorimetry [6] and capillary electrophoresis [7]. Although these methods are successfully used to determine Trp, they have several drawbacks including long analysis time, poor reproducibility, pre-cleaning of the matrix, pre-treatment of the sample and low detection limits. On the other hand, electrochemical method of determination is less expensive, more convenient, easy in handling, as well as with high sensitivity and selectivity. Several studies have been conducted in this area [8][9][10][11][12][13][14]. The results of such studies have revealed that the voltammetric response of the electrochemical process is not satisfactory due to slow heterogeneous electron transfer on the electrode surface and consequent high overpotentials of the electrochemical oxidation [15,16]. Therefore, one of the main challenges in this field is to select the suitable materials for the electrode surface modification that can increase the direct electron transfer between the electrode surface and redox molecule.Among different nanomaterials, carbon nanomaterials have attracted great interest in electroanalytical investigations because of their chemical and mechanical properties, wide potential window, and suitability for different types of analysis [17,18]. Given these unique properties, carbon nanomaterials such as carbon nanotubes (CNTs) [19][20][21], fullerene-C 60 [22], carbon nanofibers (CNFs) [23][24][25], and CNDs [26] have been widely used for modification of the electrode's surface. As new and interesting members of carbon family, CNDs have attracted great attention due to their Abstract A modified glassy carbon electrode (GCE) was prepared by incorporating carbon nanodots (CNDs) and chitosan (CS) for the determination of tryptophan (Trp). In this method, the electrochemical response of Trp was examined and the irreversible electrochemical oxidation and two electrons involved in the process of Trp were demonstrated. Because of good conductivity, large surface area, and excellent catalytic activity of CNDs, the CS and CNDs hybrid film extremely increased the electrochemical response of Trp, offering a highly sensitive electrochemical sensor for determination of Trp. The sensor showed a low detection limit of 90 nM and high sensitivity of 4 nA µM −1 . The high stability and simplicity of prepared nanohybrid combined with excellent sensitivity and selectivity of the sensor may bring novel and interesting applications for different diagnoses. As a way forward, the proposed methodology is promised for fabrication of the other effective and sensitive sensors

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Novel electrochemical sensor based on carbon nanodots/chitosan nanocomposite for the detection of tryptophan

Roushani

Sarabaegi

2015

J IRAN CHEM SOC

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“…As shown in Scheme 1, 6-TsO-b-CD was prepared by two steps with reference to our previously reported protocol [19]. First, ptoluenesulfonyl imidazole (Ts-Im) was generated by reacting imidazole with p-toluenesulfonyl chloride in dried CH 2 Cl 2 .…”

Section: Preparationmentioning

confidence: 99%

“…Magnetic nanoparticles Fe 3 O 4 were synthesized based on the reported co-precipitating Fe 2þ and Fe 3þ ions in ammonia solution under hydrothermal conditions [19,20], as shown in Scheme 1. 67 mg of FeCl 2 4H 2 O and FeCl 3 6H 2 O in 1:2 M ratio were dissolved in 200 mL redistilled water with the concentration of iron ions at 0.30 M. Precipitation was generated by adding 25% NH 4 OH solution into Fe 2þ and Fe 3þ solution at 25 C under vigorous stirring.…”

Section: Preparation Of Fe 3 O 4 Magnetic Nanoparticlesmentioning

confidence: 99%

“…Magnetic nanoparticle (3-aminopropyl)triethoxysilane (APTES) functionalized MNPs (AP-MNPs) were prepared as illustrated in Scheme 1 with reference to the reported procedure [19]. 100 mg of Fe 3 O 4 nanoparticles were suspended in 200 mL ethanol and 1.5 mL H 2 O, and sonicated for 30 min in an ultrasonic bath.…”

Section: Preparation Of B-cyclodextrin-functionalized Fe 3 Omentioning

confidence: 99%

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Investigation on the uptake and release ability of β-cyclodextrin functionalized Fe 3 O 4 magnetic nanoparticles by methylene blue

Zhou

Sun

Wang

et al. 2016

Materials Chemistry and Physics

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Exploring the Research Progress about the Applications of Cyclodextrins and Nanomaterials in Electroanalysis

et al. 2022

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Cyclodextrins and nanomaterials are widely used in the achievement of powerful platforms in supramolecular chemistry and nanotechnology. The relatively hydrophobic internal cavity of the CDs selectively retains molecules having the proper geometry, while the hydrophilic exterior allows CDs to improve the dispersibility and molecular recognition. The nanomaterials provide higher surface area, good conductivity, and electrocatalytic effect. The use of nanomaterials and CDs in electrochemical sensors' design allows the development of a large variety of devices, explaining the increasing number of papers in the last years that are discussed in this review.

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β-Cyclodextrin/Fe3O4 hybrid magnetic nano-composite modified glassy carbon electrode for tryptophan sensing

Cited by 97 publications

References 37 publications

Novel electrochemical sensor based on carbon nanodots/chitosan nanocomposite for the detection of tryptophan

Novel electrochemical sensor based on carbon nanodots/chitosan nanocomposite for the detection of tryptophan

Investigation on the uptake and release ability of β-cyclodextrin functionalized Fe 3 O 4 magnetic nanoparticles by methylene blue

Exploring the Research Progress about the Applications of Cyclodextrins and Nanomaterials in Electroanalysis

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