Microwave-assisted synthesis of BSA-stabilised gold nanoclusters for the sensitive and selective detection of lead(<scp>ii</scp>) and melamine in aqueous solution

Lee, Che Yu; Hsu, Nai Yueh; Wu, Mei; Lin, Yu‐Liang

doi:10.1039/c6ra16043c

Cited by 14 publications

(12 citation statements)

References 56 publications

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“…More recently, Lin and co-workers established the efficiency of egg-white protected gold nanoclusters (ew-Au NCs) through microwave technique [54]. However, the melamine detection by ew-Au NCs displayed the similar Hg(II) mediated approaches as described earlier [49,52]. The reported melamine detection has an LOD of 0.46 µM and recovery percentile range from 92.9 to 106% with RSD of 2.9%.…”

Section: Metal Nanoclusters Towards Melamine Determinationmentioning

confidence: 85%

“…Recoveries of this study in raw milk and milk powder were at the range from 98.5 to 101.5%. The above Hg(II) mediated sensing approach was further modified by Lin and co-workers [52]. They synthesized the BSA-Au NCs by microwave-assisted synthetic path and then applied in melamine detection as reported earlier.…”

Section: Metal Nanoclusters Towards Melamine Determinationmentioning

confidence: 99%

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Review on Nanomaterial-Based Melamine Detection

Shellaiah

Sun

2019

Chemosensors

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Illegal adulteration of milk products by melamine and its analogs has become a threat to the world. In 2008, the misuse of melamine with infant formula caused serious effects on babies of China. Thereafter, the government of China and the US Food and Drug Administration (FDA) limited the use of melamine of 1 mg/kg for infant formula and 2.5 mg/kg for other dairy products. Similarly, the World Health Organization (WHO) has also limited the daily intake of melamine of 0.2 mg/kg body weight per day. Many sensory schemes have been proposed by the scientists for carrying out screening on melamine poisoning. Among them, nanomaterial-based sensing techniques are very promising in terms of real-time applicability. These materials uncover and quantify the melamine by means of diverse mechanisms, such as fluorescence resonance energy transfer (FRET), aggregation, inner filter effect, surface-enhanced Raman scattering (SERS), and self-assembly, etc. Nanomaterials used for the melamine determination include carbon dots, quantum dots, nanocomposites, nanocrystals, nanoclusters, nanoparticles, nanorods, nanowires, and nanotubes. In this review, we summarize and comment on the melamine sensing abilities of these nanomaterials for their suitability and future research directions.

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Section: Metal Nanoclusters Towards Melamine Determinationmentioning

confidence: 85%

Section: Metal Nanoclusters Towards Melamine Determinationmentioning

confidence: 99%

Review on Nanomaterial-Based Melamine Detection

Shellaiah

Sun

2019

Chemosensors

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“…The concentrations of BSA, HAuCl 4 , and NaOH used in this study to synthesize AuNCs@BSA were the same as those used in an earlier study. , However, the domestic MW oven used in the earlier study was replaced. A focused single-mode MW synthesis instrument (300 W) was selected as the MW source to avoid damage to BSA, to ensure efficient production of MW energy, and to provide rapid MW heating.…”

Section: Resultsmentioning

confidence: 99%

“…Microwave (MW) heating was utilized to develop a more efficient method for preparing AuNCs. MW heating not only reduced the reaction time from tens of hours to several minutes but also suppressed side reactions, thereby improving the yield and reproducibility of a specific synthesis protocol. − In addition, because the synthesis of small AuNCs is highly sensitive to reaction conditions, the MW-assisted method could provide a greater control over the growth of AuNCs and correspondingly improve their optical properties. However, AuNCs obtained using this method still exhibited red emission. , …”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Formation of Gold Nanoclusters Capped in Bovine Serum Albumin and Exhibiting Red or Blue Emission

Chuang

Lin

2017

J. Phys. Chem. C

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In this study, a microwave-assisted method for preparing fluorescent gold nanoclusters capped in bovine serum albumin (AuNCs@ BSA) was developed. Through fluorescence spectrometry, transmission electron microscopy, and X-ray photoelectron spectroscopy (XPS), the effect of reaction temperature on the size and oxidation state of AuNCs@ BSA samples was determined. Blue-emitting AuNCs@BSA (B-AuNCs@ BSA), with weak bonds between AuNCs and BSA, were prepared at 135 °C. Red-emitting AuNCs@BSA (R-AuNCs@BSA) were also formed, and their formation was followed by an aggregation of polydispersed AuNCs@ BSA. Through infrared spectrometry and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, it was confirmed that the R-AuNCs@BSA, consisting of 18 Au atoms, was successfully embedded in BSA. In addition, XPS measurements revealed that Au + ions were present only in the R-AuNCs@BSA. Steady-state and lifetime results revealed the importance of the size and oxidation state of Au + in the stabilization of the AuNCs@BSA and in the presence of a long lifetime component.

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“…Sensitive detection of Pb 2+ had versatile applications in modern society. Conventional measurements methods include atomic absorption spectrophotometry, inductively‐coupled‐plasma mass spectrometry, and X‐ray fluorescence spectrometry . Although these methods provide sensitivity and reliability, they are expensive, time‐consuming, and complicated operation .…”

Section: Introductionmentioning

confidence: 99%

Preparation of block copolymers via metal‐free visible‐light‐induced ATRP for the detection of lead ions

Sun

Zhao

et al. 2017

J of Applied Polymer Sci

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Polyacrylamide‐b‐poly(methacrylic acid) was prepared on the surface of Au electrode (Au/PAM/PMAA) for Pb2+ ion electrochemical sensing via metal‐free visible‐light‐induced atom transfer radical polymerization, which was very simple, convenient, and environmentally friendly. Au/PAM/PMAA was carefully examined by cyclic voltammetry, electrochemical impedance spectroscopy, and X‐ray photoelectron spectroscopy. Further, Au/PAM/PMAA was successfully used for the determination of Pb2+ ion by differential pulse anodic stripping voltammetry. Under the optimal conditions, a linear response from 1.0 × 10−11 to 1.0 × 10−4 mol/L with detection limit of 2.5 × 10−12 mol/L (S/N = 3) was achieved from the results of experiments. Comparing with similar Pb2+ sensors, the broader linear range and lower detection limit suggested the promising prospect of Au/PAM/PMAA. In a word, the work of this article had an important significance for the polymer‐modified electrodes and the sensitive detection of Pb2+. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45863.

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Microwave-assisted synthesis of BSA-stabilised gold nanoclusters for the sensitive and selective detection of lead(ii) and melamine in aqueous solution

Abstract: MW-assisted synthesis of fluorescent BSA-AuNCs for the turn-off sensing of Pb(ii) and turn-on sensing of melamine.

Cited by 14 publications

References 56 publications

Review on Nanomaterial-Based Melamine Detection

Review on Nanomaterial-Based Melamine Detection

Microwave-Assisted Formation of Gold Nanoclusters Capped in Bovine Serum Albumin and Exhibiting Red or Blue Emission

Preparation of block copolymers via metal‐free visible‐light‐induced ATRP for the detection of lead ions

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