Preparation of Ag<sub>2</sub>S Nanocrystals of Predictable Shape and Size

Lim, Wen Pei; Zhang, Zhihua; Low, Hong Yee; Chin, Wee Shong

doi:10.1002/ange.200460566

Cited by 24 publications

(10 citation statements)

References 34 publications

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“…Dong et al [12] synthesized cubic Ag 2 S via hydrothermal method by using CTAB as a surfactant. Chin et al [13] used various stabilizing agent such as hexadecylamine (HDA), octylamine (OA), ethylenediamine (EDA) and dioctylamine (DOA) to synthesize stable Ag 2 S NPs. Most of the previous studies in which has a remarkable effect on adjusting the Ag 2 S morphology focus on the choice of stabilizers or surfactants, but the reaction condition and process to are complicated.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Synthesis and characterization of silver sulfide nanoparticles for photocatalytic and antimicrobial applications

Kumari

Chandran

Khan

2014

Journal of Photochemistry and Photobiology B: Biology

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Section: Introductionmentioning

confidence: 99%

RETRACTED: Synthesis and characterization of silver sulfide nanoparticles for photocatalytic and antimicrobial applications

Kumari

Chandran

Khan

2014

Journal of Photochemistry and Photobiology B: Biology

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“…Recently, Pei et al 25 reported several hollow or core-centered polyhedral structures for many gold-sulde cluster anions (Au m S n À ). 29,30 However, the structures of Au 2 S nanoparticles are very different from those of Cu 2 S and Ag 2 S nanoparticles, which show crosssheet-like or plate-like superstructures. However, the gold-to-sulfur ratio is usually 3 : 2 in hollow polyhedral structures.…”

Section: Introductionmentioning

confidence: 99%

Structural evolution of (Au₂S)_n (n = 1–8) clusters from first principles global optimization

Feng

Cheng

2015

RSC Adv.

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We explore the structural evolution of (Au 2 S) n (n ¼ 1-8) clusters using a first principles global minimization technique, namely, a genetic algorithm from density functional theory geometry optimization (GA-DFT).The growth sequence and pattern for n from 1 to 8 are analyzed from the perspective of geometric shell formation. The average binding energy, HOMO-LUMO energy gaps, vertical electron affinity, and vertical ionization potential are examined as a function of the cluster size. The global minimum structures are planar at n ¼ 1-3, three-dimensional at n ¼ 4-8. The formation of these structures are attributed to the high stability of S-Au-S structural unit and particularly the Au 3 S 3 and Au 4 S 4 rings. Chemical bonding analysis reveals that the three-dimensional clusters (n ¼ 4-8) can be viewed as [Au 2nÀx S n ] xÀ $xAu + in electronic structure. The Au + cations are not involved in any S-Au covalent bond, however, are attracted by only Au/Au aurophilic interactions. Direct evidence for the Au/Au aurophilicity are given by a noncovalent interaction index analysis. Such Au/Au aurophilic interactions play an important role in the stability of (Au 2 S) n clusters. † Electronic supplementary information (ESI) available: AdNDP localized bonding patterns of (Au 2 S) n (n ¼ 5-8) and atomic coordinates (inÅ) of the global minimum structures. See Fig. 1 The global minimum and low-energy isomers and the bonding framework of (Au 2 S) n (n ¼ 1-8) clusters at the TPSS/LanL2DZ/6-31G* level. Labelled are the point groups and relative energies in eV. (Au yellow, S purple). This journal is

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“…It should be mentioned that metallic or ionic Ag, which will be investigated in the present work, is a toxic element to microorganisms and shows prominent bactericidal activity against as many as 12 species of bacteria including Escherichia coli 2425. On the other hand, Ag 2 S is both a direct narrow-band-gap semiconducting metal sulfide and an effective ionic semiconductor in which Ag + ions behave just like free electrons in metals resulting in cationic vacancy rich Ag 2 S phase3940. Such unique chemical and structural properties could endow it as an excellent host mediator for preparation of Ag 2 S-based heterodimers with improved properties36373842434445.…”

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confidence: 98%

Ag nanoprisms with Ag2S attachment

Xiong

Zhang

Chen

et al. 2013

Sci Rep

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Triangular Ag nanoprisms are a type of most-studied noble-metal nanostructures over the past decade owing to their special structural architecture and outstanding optical and catalytic properties for a wide range of applications. Nevertheless, in contrast to active research for the synthesis of phase-pure Ag nanoprisms, no asymmetric heterodimers containing Ag prisms have been developed so far, probably due to lack of suitable synthetic methods. Herein, we devise a simple ion-exchange method to synthesize Ag2S/Ag heterodimers at room temperature, through which Ag nanoprisms with controllable size and thickness can be fabricated. Formation chemistry and optical properties of the heterodimers have been investigated. These semiconductor/metal heterodimers have exhibited remarkable bactericidal activity to E. coli cells under visible light illumination.

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Preparation of Ag₂S Nanocrystals of Predictable Shape and Size

Cited by 24 publications

References 34 publications

RETRACTED: Synthesis and characterization of silver sulfide nanoparticles for photocatalytic and antimicrobial applications

RETRACTED: Synthesis and characterization of silver sulfide nanoparticles for photocatalytic and antimicrobial applications

Structural evolution of (Au₂S)_n (n = 1–8) clusters from first principles global optimization

Ag nanoprisms with Ag2S attachment

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Preparation of Ag2S Nanocrystals of Predictable Shape and Size

Cited by 24 publications

References 34 publications

RETRACTED: Synthesis and characterization of silver sulfide nanoparticles for photocatalytic and antimicrobial applications

RETRACTED: Synthesis and characterization of silver sulfide nanoparticles for photocatalytic and antimicrobial applications

Structural evolution of (Au2S)n (n = 1–8) clusters from first principles global optimization

Ag nanoprisms with Ag2S attachment

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Product

Resources

About

Preparation of Ag₂S Nanocrystals of Predictable Shape and Size

Structural evolution of (Au₂S)_n (n = 1–8) clusters from first principles global optimization