Facile synthesis of red-emitting lysozyme-stabilized Ag nanoclusters

Zhou, Tingyao; Huang, Yandong; Li, Wenbin; Cai, Zhiyong; Luo, Feng; Yang, Chaoyong; Chen, Xi

doi:10.1039/c2nr31449e

Cited by 130 publications

(99 citation statements)

References 40 publications

(40 reference statements)

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“…3F, two peaks at 368.2 eV and 374.2 eV were observed in the Ag 3d XPS spectra of (AgNP@Lys/TA) 10 and (AgNP@Lys/TA) 10.5 nanobrous mats corresponding to Ag 3d 5/2 and Ag 3d 3/2 , respectively. These results are in good agreement with the results of Zhou et al 19 The presence of signal at 368.2 eV revealed that Ag + exist in the complex. 34 The Moreover, with the increase of particle size, the binding energy would have a slight blue shi to about 367.7 eV.…”

Section: Surface Composition Analysis Of Agnp-lys/ta Nanobrous Matssupporting

confidence: 95%

Vacuum-assisted layer-by-layer electrospun membranes: antibacterial and antioxidative applications

Zhou

Jin²,

et al. 2014

RSC Adv.

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Layer-by-layer assembled films have been exploited for functional materials. Tannic acid with previously confirmed antibacterial and antioxidant potentials was deposited on cellulose nanofibrous mats. The LbL assembly technique allowed sufficient binding of TA and AgNPs-Lys to the supporting substrate via hydrogen bond and electrostatic interactions. The properties and morphology of the AgNPs-Lys/TA multilayer assembly membranes were characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (FT-IR), wide-angle X-ray diffraction (XRD), and scanning electron microscopy (SEM). The antibacterial and antioxidant activities were examined as well. The hybrid composite films have potential application in food packing and wound dressing, and tissue engineering, etc.

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Section: Surface Composition Analysis Of Agnp-lys/ta Nanobrous Matssupporting

confidence: 95%

Vacuum-assisted layer-by-layer electrospun membranes: antibacterial and antioxidative applications

Zhou

Jin²,

et al. 2014

RSC Adv.

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“…13 Dendrimers, synthetic polymers, biopolymers, thiol ligands, and inorganic matrices have been used as the stabilizing ligands for AgNCs. 6,11,[14][15][16][17] In 2004, Dickson and coworkers first discovered the formation of DNA-templated Ag nanoclusters (DNA-AgNCs) where they showed that DNA acts as a template for the time-dependent and size-specific formation of nanoclusters. 18 Since then, DNA-AgNCs have become a research field of growing interest.…”

Section: Introductionmentioning

confidence: 99%

Research Update: Density functional theory investigation of the interactions of silver nanoclusters with guanine

2017

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Bare and guanine-complexed silver clusters Ag n z (n = 2-6; z = 0-2) are examined using density functional theory to elucidate the geometries and binding motifs that are present experimentally. Whereas the neutral systems remain planar in this size range, a 2D-3D transition occurs at Ag 5 + for the cationic system and at Ag 4 2+ for the dicationic system. Neutral silver clusters can bind with nitrogen 3 or with the pi system of the base. However, positively charged clusters interact with nitrogen 7 and the neighboring carbonyl group. Thus, the cationic silver-DNA clusters present experimentally may preferentially interact at these sites. © 2017 Author (s)

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“…The three silver nanoclusters capped with denatured lysozyme (dLys-AgNCs) were prepared according to the report by Chen et al 28 with some modification. The reactant molar ratio of AgNO 3 to lysozyme was 1:1, 2:1 and 4:1 for synthesizing dLys-AgNCs 1, dLys-AgNCs 2 and dLys-AgNCs 3, respectively.…”

Section: Preparation Of Dlys-agncsmentioning

confidence: 99%

“…Later, some other proteins, like lysozyme 32 , insulin 33 , pepsin 34 , trypsin 35 , as well as horseradish peroxidase 36 and lactotransferrin 37 were also applied as scaffold for the synthesis of metal nanoclusters. The four disulfide bonds in the secondary structure of lysozyme were broken in alkaline conditions during synthesis, and could provide binding sites for Ag nanoclusters and stabilize the nanoclusters 28 .…”

Section: Introductionmentioning

confidence: 99%

“…In order to satisfy the needs of biotechnology and biomedicine, the scaffolds which were used to synthesize AgNCs have been developed from thiols 20 and polymers [21][22][23] to DNA [24][25][26] , peptides 27 and proteins 28,29 . As a stabilizer for metal nanoclusters, proteins are more water soluble and biocompatible compared with macromolecular polymers like PIE or PMAA, and more stable than other small molecular thiol compounds like Cys or GSH and DNA.…”

Section: Introductionmentioning

confidence: 99%

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Lysozyme-stabilized Ag nanoclusters: synthesis of different compositions and fluorescent responses to sulfide ions with distinct modes

Gao

Liu

et al. 2016

RSC Adv.

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In this study, three kinds of red-emitting Ag nanoclusters capped with denatured lysozyme (dLys-AgNCs) were synthesized from different reactant molar ratio of AgNO 3 and lysozyme, called dLys-AgNCs 1, dLys-AgNCs 2 and dLys-AgNCs 3, respectively.The thus synthesized dLys-AgNCs 1 contained only Ag(0), while dLys-AgNCs 2 and dLys-AgNCs 3 contained both Ag(0) and Ag(I). The maximum emission wavelengths of the three dLys-AgNCs were all located near 640 nm when excited at 490 nm, but with different photoluminescence intensity. The photoluminescence properties of these dLys-AgNCs in the presence of common inorganic anions were studied. The three dLys-AgNCs had distinct photoluminescence responding mode to S 2-. The photoluminescence of dLys-AgNCs 1 could be quenched by S 2-, as S 2-destroyed the nanostructure of dLys-AgNCs 1 by forming Ag 2 S. While, the photoluminescence of dLys-AgNCs 3 could be enhanced by S 2-, as S 2-would combine with Ag(I) contained in dLys-AgNCs 3 and altered the ligand-to-metal-metal charge transfer process. For dLys-AgNCs 2, the photoluminescence was enhanced firstly with small amount of S 2-and then quenched with more S 2-added, and this could be due to that S 2-combined with Ag(I) first at low concentration and then with Ag(0) in high concentration. Other anions had no obvious effects except that I -could quench the photoluminescence of these three dLys-AgNCs. The responding mechanisms were further studied by XPS, MS, zeta potential, DLS, and lifetime measurements. Moreover, the as-prepared dLys-AgNCs 1 and dLys-AgNCs 3 were used as fluorescent probe for S 2-

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Facile synthesis of red-emitting lysozyme-stabilized Ag nanoclusters

Abstract: A facile approach was developed to prepare positively charged and red-emitting lysozyme-stabilized Ag nanoclusters (Lys-AgNCs) using NaBH₄ as a reducing agent at room temperature. The Lys-AgNCs can be applied in the highly selective detection of Hg²⁺.

Cited by 130 publications

References 40 publications

Vacuum-assisted layer-by-layer electrospun membranes: antibacterial and antioxidative applications

Vacuum-assisted layer-by-layer electrospun membranes: antibacterial and antioxidative applications

Research Update: Density functional theory investigation of the interactions of silver nanoclusters with guanine

Lysozyme-stabilized Ag nanoclusters: synthesis of different compositions and fluorescent responses to sulfide ions with distinct modes

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