Facile Synthesis of Size-Tunable Silver Nanoparticles by Heteroepitaxial Growth Method for Efficient NIR SERS

Tharion, Joseph; Satija, Jitendra; Mukherji, Suparna

doi:10.1007/s11468-014-9862-5

Cited by 13 publications

(6 citation statements)

References 51 publications

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“…Silver nanoparticles were synthesized by heteroepitaxial growth approach as it yields nanoparticles of uniform size and shape (Tharion et al 2015). The silver was grown on seed gold nanoparticles (AuNPs) by modified Tollens' reaction.…”

Section: Synthesis Of Silver Nanoparticlesmentioning

confidence: 99%

Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

et al. 2017

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Mercury and its compounds are widely distributed in the environment and have a significant negative impact on human health. In this paper, we report the development of a rapid and facile method for the detection of mercury ions (Hg 2? ) using heteroepitaxially synthesized unmodified silver nanoparticle-based smart probes using UV-Vis spectrophotometer and also through the naked eye by means of a paper-based sensor strip. The silver nanoparticles were prepared by heteroepitaxial growth method using gold seed nanoparticle of *2.4 nm size as the template. The silver is grown on the seed particles by reducing the silver-ammonia complex using glucose, which resulted in Glu-AgNPs having an average size of 14.65 ± 3.53 nm. The sensing of mercury ions was carried out in aqueous solution and the reaction response was monitored by UV-Vis spectrophotometer. The interaction of Hg 2? with Glu-AgNPs resulted in a significant drop in the absorbance at 402 nm along with a prominent color change (from bright yellow to colorless) and wavelength shift (blue shift). The limit of detection (LOD) of this assay was found to be 100 nM (i.e., 20 ppb) with a good linearity in the concentration range of 100-10 mM. To further ease the detection process and make it field deployable, we attempted to develop a paper-based sensor strip by immobilizing Glu-AgNPs on a paper strip. Upon interaction with mercury solution of varying concentrations, the decoloration of the spots could be observed easily through naked eyes, with the limit of detection under sub-optical conditions being 1 lM.

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Section: Synthesis Of Silver Nanoparticlesmentioning

confidence: 99%

Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

et al. 2017

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“…The return of the electron to its initial state in the metal—i.e., the recombination of the electron and the hole—emits a Raman-shifted photon [19,20,21]. Usually, SERS substrates are fabricated either by immobilizing a colloidal silver nanoparticle (AgNP) on 3-aminopropyltriethoxysilane-coated glass coverslips [22] or by dropping tiny volumes of colloidal AgNPs onto microscope glass coverslips [23,24,25]. Despite the simplicity, such SERS substrates are not stable, and AgNPs are easily displayed by water streams.…”

Section: Introductionmentioning

confidence: 99%

Robust SERS Platforms Based on Annealed Gold Nanostructures Formed on Ultrafine Glass Substrates for Various (Bio)Applications

et al. 2019

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In this study, stable gold nanoparticles (AuNPs) are fabricated for the first time on commercial ultrafine glass coverslips coated with gold thin layers (2 nm, 4 nm, 6 nm, and 8 nm) at 25 °C and annealed at high temperatures (350 °C, 450 °C, and 550 °C) on a hot plate for different periods of time. Such gold nanostructured coverslips were systematically tested via surface enhanced Raman spectroscopy (SERS) to identify their spectral performances in the presence of different concentrations of a model molecule, namely 1,2-bis-(4-pyridyl)-ethene (BPE). By using these SERS platforms, it is possible to detect BPE traces (10−12 M) in aqueous solutions in 120 s. The stability of SERS spectra over five weeks of thiol-DNA probe (2 µL) deposited on gold nano-structured coverslip is also reported.

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“…Pd, [146][147][148] Ag [148][149][150][151][152][153][154][155][156] and PdAg [157][158][159][160][161] nanoparticles have been known for many years and find use in a wide range of applications in their own right, but these uses are beyond the scope of this review and as such are not discussed further. Such particles also find use as precursors to PdAg films, 109,113 and as such an overview of their preparation is presented.…”

Section: Pdag Nanoparticle Preparationmentioning

confidence: 99%

Manufacture, Applications, and Opportunities of Thin Film Palladium-Silver (PdAg) Alloys: A Review

Holdsworth¹

2019

Preprint

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The noble metals palladium and silver find use in many high performance applications, and their alloys (PdAg), known for more than sixty years, are industrially important, finding use in many fields including hydrogen purification and separation, numerous facets of catalysis, and in fuel cells. In recent years, interest in these materials has grown significantly, particularly in energy generating applications and due to their performance as solid-state chemical sensors for a range of small molecules. PdAg thin films can be prepared using traditional physical methods such as cold rolling, or more modern and controllable chemical or physical deposition techniques such as electrodeposition or chemical vapour deposition. Despite the wide-reaching uses of PdAg, several recent advancements in materials preparation, such as additive manufacturing, better known as 3-D printing, remain unexplored for this material due to the differing chemistries of the two elements. In this review, we explore the manufacturing methods commonly employed for the preparation of PdAg thin films, the common and niche applications of these materials, and opportunities for the future development of these two aspects, with an emphasis on how preparation of thin films can utilise additive manufacturing approaches.

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Facile Synthesis of Size-Tunable Silver Nanoparticles by Heteroepitaxial Growth Method for Efficient NIR SERS

Cited by 13 publications

References 51 publications

Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

Robust SERS Platforms Based on Annealed Gold Nanostructures Formed on Ultrafine Glass Substrates for Various (Bio)Applications

Manufacture, Applications, and Opportunities of Thin Film Palladium-Silver (PdAg) Alloys: A Review

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