An Amyloid‐Fibril‐Based Colorimetric Nanosensor for Rapid and Sensitive Chromium(VI) Detection

Leung, Wai Hong; Zou, Li; Lo, Wai Hung; Chan, P.H.

doi:10.1002/cplu.201300267

Cited by 14 publications

(3 citation statements)

References 23 publications

(13 reference statements)

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“…Although proteins such as fibroin are not related to diseases, knowledge regarding their fibrillation is important for the basic studies in this field as well as applications in different areas of nanobiotechnology. Up to now, fibrillation of proteins which are not causing a disease such as casein [45], globulins [46] and lysozyme [47,48] have been studied. Protein fibril formation can be studied from two views of fibril production and structural changes upon and/or during the fibrillation process.…”

Section: Discussionmentioning

confidence: 99%

Study of Nanofibrils Formation of Fibroin Protein in Specific Thermal and Acidity Conditions

2020

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Background: Amyloid fibrils are insoluble arranged aggregates of proteins that are fibrillar in structure and related to many diseases (at least 20 types of illnesses) and also create many pathologic conditions. Therefore understanding the circumstance of fibril formation is very important. Objectives: This study aims to work on fibrillar structure formation of fibroin (as a model protein). Material and Methods: In this experimental study, fibroin was extracted from bombyx mori silk cocoon, and the concentration was obtained by Bradford method. The protein was incubated in a wide range of times (0 min to 7 days) in specific acidity and thermal conditions (pH=1.6, T=70 °C). The assays of UV-vis spectroscopy with congo red, field emission scanning electron microscopy, transmission electron microscopy, atomic force microscopy and circular dichroism spectroscopy were employed to monitor the fibrillation process. Results: Fibroin assemblies were formed upon the process of aggregation and fibril formation with a variety of morphology ranging from nanoparticles to elongated fibrils. Conclusion: The results showed progressive pathway of fibril formation.

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Section: Discussionmentioning

confidence: 99%

Study of Nanofibrils Formation of Fibroin Protein in Specific Thermal and Acidity Conditions

2020

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“…176 Also, an amyloid fibril-based colorimetric nanosensor has been reported for the detection of chromium( vi ) using hen lysosome fibrils and acidified diphenylcarbazide as the colorimetric probe. 177 The hydrogel of α-synuclein amyloid fibrils immobilized with horseradish peroxidase (HRP) enhanced the activity of immobilized HRP by four-fold, suggesting applications of enzyme–amyloid conjugates. 178…”

Section: Application Of Amyloid-based Functional Materialsmentioning

confidence: 99%

Advancements in amyloid-based biological materials for healthcare, environmental and sensing applications

Yadav,

Padhy,

Singh

et al. 2024

Mater. Adv.

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“…6 Guideline values proposed by the World Health Organization (WHO) for total chromium and Cr(VI) in drinking water are 50 ppb and 16 ppb, respectively. 7 Several traditional quantitative techniques have been developed for the detection of Cr(VI); for example, inductively coupled plasma mass spectrometry (ICP-MS), 8 atomic absorption spectroscopy (AAS), 9 and X-ray uorescence (XRF). 10 Although these methods show high accuracy and selectivity for the determination of Cr(VI), most of them require professional operation and sophisticated sample pretreatment, which render them unsuitable for real-time eld monitoring.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric sensing of chromium(vi) ions in aqueous solution based on the leaching of protein-stabled gold nanoparticles

et al. 2016

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Herein, we have developed a simple, sensitive and non-aggregation-based method for the selective colorimetric detection of Chromium (Ⅵ) ions (Cr (VI)) in aqueous solution. In the presence of hydrobromic acid (HBr), the bovine serum albumin stabled gold nanoparticles (BSA-Au NPs) were gradually dissolved by Cr (VI) as the etching process of gold. The leaching of BSA-Au NPs results in rapid and remarkable damping of the surface plasmon resonance (SPR) and hence induces a visible color change.This colorimetric strategy based on the etching process of gold provided a highly sensitive and selective detection method toward Cr (VI). Under optimal conditions, the amount-dependent colorimetric response was linearly correlated with the Cr (VI) concentrations ranging from 0.15µM to 50.0 µM, with a detection limit down to 120 nM measured as 3δ. Moreover, the developed cost-effective probe has been successfully applied to real river samples which demonstrated the potential for field applications.

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An Amyloid‐Fibril‐Based Colorimetric Nanosensor for Rapid and Sensitive Chromium(VI) Detection

Cited by 14 publications

References 23 publications

Study of Nanofibrils Formation of Fibroin Protein in Specific Thermal and Acidity Conditions

Study of Nanofibrils Formation of Fibroin Protein in Specific Thermal and Acidity Conditions

Advancements in amyloid-based biological materials for healthcare, environmental and sensing applications

Colorimetric sensing of chromium(vi) ions in aqueous solution based on the leaching of protein-stabled gold nanoparticles

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