Direct experimental observation of salt induced aspect ratio tunable PFPT silver-nanowire formation: SERS-based ppt level Hg<sup>2+</sup> sensing from ground water

Bhattacharya, M.; Mandal, Arup; Chakraborty, Saswata; Maiti, Arpan; Maity, Achyut; Кузнецов, Денис; Mondal, Pritiranjan; Senapati, Dulal

doi:10.1039/c6ra02900k

Cited by 5 publications

(3 citation statements)

References 86 publications

(25 reference statements)

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“…The generation of Ag nanorods (only ~0.74 μm) with an extremely small aspect ratio of 15.1 is observed only when the I − is as low as 33.3%. The results indicate that the existence of I − can restrain the formation of AgNWs, being consistent with the reported results [ 44 , 45 ].…”

Section: Resultssupporting

confidence: 93%

Mechanism Understanding for Size Regulation of Silver Nanowires Mediated by Halogen Ions

et al. 2022

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The controllable preparation of silver nanowires (AgNWs) with a high aspect ratio is key for enabling their applications on a large scale. Herein, the aspect ratio regulation of AgNWs mediated by halogen ion composition in ethylene glycol system was systematically investigated and the size evolution mechanism is elaborately understood. The co-addition of Br− and Cl− results in AgNWs with the highest aspect ratio of 1031. The surface physicochemical analysis of AgNWs and the density functional theory calculations indicate that the co-addition of Br− and Cl− contributes to the much-enhanced preferential growth of the Ag(111) crystal plane. At the same time, when Cl− and Br− coexist in the solution, the growth of the Ag(100) crystal plane on the AgNWs was restrained compared with that in the single Cl− system. Resultantly, the enhanced growth of Ag(111) and the inhibited growth of Ag(100) contribute to the formation of AgNWs with a higher aspect ratio in the Cl–Br mixed solution. The results can provide new insights for understanding the morphology and size evolution during the AgNWs preparation in ethylene glycol system.

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Section: Resultssupporting

confidence: 93%

Mechanism Understanding for Size Regulation of Silver Nanowires Mediated by Halogen Ions

et al. 2022

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“…Therefore, the question arises whether it is possible to prepare Au–AgNRs more than 840 nm to maximize this effect. We have previously reported pure Ag nanorods with lengths of more than 10 μm . Bimetallic Au–Ag nanorods of length ∼1.2 μm have also been reported earlier.…”

Section: Resultssupporting

confidence: 69%

“…We have previously reported pure Ag nanorods with lengths of more than 10 μm. 64 Bimetallic Au− Ag nanorods of length ∼1.2 μm have also been reported 65 earlier. Details about the synthesis and control of length, morphology, monodispersity, and efficiency of assembly formation are included in the SI section (Figures S13−S19).…”

Section: Resultsmentioning

confidence: 67%

Au-Seeded Ag-Nanorod Networks for Electrocatalytic Sensing

Kumar

Ray

et al. 2020

ACS Appl. Nano Mater.

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Spherical gold nanoseed (∼5–6 nm)-induced (but not seed-mediated) silver nanorods (Hy-Au@AgNRs) of variable lengths have been synthesized by a new methodology that shows enhancement in catalytic activity as a function of nanorod length. Detailed characterization by atomic-scale resolution spectroscopy, precision scattering measurements, high-resolution microscopy, and theoretical modeling through the density functional theory (DFT) quantifies the presence of an enhanced number of multiple coaxial twin boundaries for longer Hy-Au@AgNRs, which ultimately results in an increased mechanical strain. By considering greater mechanical strain within Hy-Au@AgNRs, the density of states (DOS) calculation shows a prominent shift in electron density toward the Fermi level to assist in the tremendous catalytic activity of the longest nanorod (NR) (Hy-Au@AgNR840). Further assembling of these inherently active Hy-Au@AgNR840s by thiol click chemistry not only efficiently creates multiple low-coordinated crystal sites to improve their catalytic activity but also the resultant uniform two-dimensional (2D) platform shows better adsorptivity and easy moldability on the electrode surface for increased shelf life, a uniform porous structure to trap a large extent of redox systems, enhanced stability in a broad pH and solvent range to increase the applicability, and long-term stability under ambient conditions for safe storing, making this material a unique nonenzymatic scalable universal electrocatalytic platform. The ability of this material to act as a nonenzymatic universal catalytic platform has been verified by applying it for highly specific and ultrasensitive detection of a series of human metabolites, which include different important vitamins, potent endogenous antioxidants, essential amino acids for the biosynthesis of proteins, simple monosaccharides, and essential trace-metal ions. Our study for the first time mechanistically explores the combined role of anisometric seeding to create an intermetallic twin boundary along with its size to control the strain-induced catalytic activity to offer us a universal 2D electrocatalytic sensing platform by a combined approach of experiment and theory.

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Reductant free synthesis of silver-carbon nanocomposite using low temperature carbonized Ipomoea carnea stem carbon and study of its antibacterial property

Saikia

Allou

Sarmah

et al. 2018

Journal of Environmental Chemical Engineering

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Direct experimental observation of salt induced aspect ratio tunable PFPT silver-nanowire formation: SERS-based ppt level Hg²⁺ sensing from ground water

Abstract: A common salt induced aspect ratio tunable PFPT silver nanowire synthesis with a plausible explanation based on real-time direct experimental observation finds application as a potential assay for ppt level Hg(ii) sensing from ground water.

Cited by 5 publications

References 86 publications

Mechanism Understanding for Size Regulation of Silver Nanowires Mediated by Halogen Ions

Mechanism Understanding for Size Regulation of Silver Nanowires Mediated by Halogen Ions

Au-Seeded Ag-Nanorod Networks for Electrocatalytic Sensing

Reductant free synthesis of silver-carbon nanocomposite using low temperature carbonized Ipomoea carnea stem carbon and study of its antibacterial property

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Direct experimental observation of salt induced aspect ratio tunable PFPT silver-nanowire formation: SERS-based ppt level Hg2+ sensing from ground water

Abstract: A common salt induced aspect ratio tunable PFPT silver nanowire synthesis with a plausible explanation based on real-time direct experimental observation finds application as a potential assay for ppt level Hg(ii) sensing from ground water.

Cited by 5 publications

References 86 publications

Mechanism Understanding for Size Regulation of Silver Nanowires Mediated by Halogen Ions

Mechanism Understanding for Size Regulation of Silver Nanowires Mediated by Halogen Ions

Au-Seeded Ag-Nanorod Networks for Electrocatalytic Sensing

Reductant free synthesis of silver-carbon nanocomposite using low temperature carbonized Ipomoea carnea stem carbon and study of its antibacterial property

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Product

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Direct experimental observation of salt induced aspect ratio tunable PFPT silver-nanowire formation: SERS-based ppt level Hg²⁺ sensing from ground water