Cysteine sensing by plasmons of silver nanocubes

Elfassy, Eitan; Mastai, Yitzhak; Salomon, Adi

doi:10.1016/j.jssc.2016.06.002

Cited by 18 publications

(7 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among others the noble metal nanomaterials were developed by bottom up approach with various morphologies such as spheres, cubes, stars, flowers and wires, showing significant chemical-physical properties that allow to unique interactions with the environment [35][36][37][38][39][40][41][42]. Researchers are amazed by the possibility to produce gold and silver nanoparticles with specific morphology and surface functionalization, leading to new properties [43][44][45]. Moreover, advanced characterization methods allow one to study their capability to respond to changes in pH, redox potentials, temperature, light and magnetic fields [46][47][48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles as Colorimetric Sensors for Water Pollutants

2020

View full text Add to dashboard Cite

This review provides an up-to-date overview on silver nanoparticles-based materials suitable as optical sensors for water pollutants. The topic is really hot considering the implications for human health and environment due to water pollutants. In fact, the pollutants present in the water disturb the spontaneity of life-related mechanisms, such as the synthesis of cellular constituents and the transport of nutrients into cells, and this causes long / short-term diseases. For this reason, research continuously tends to develop always innovative, selective and efficient processes / technologies to remove pollutants from water. In this paper we will report on the silver nanoparticles synthesis, paying attention to the stabilizers and mostly used ligands, to the characterizations, to the properties and applications as colorimetric sensors for water pollutants. As water pollutants our attention will be focused on several heavy metals ions, such as Hg(II), Ni(II),Cu(II), Fe(III), Mn(II), Cr(III/V) Co(II) Cd(II), Pb(II), due to their dangerous effects on human health. In addition, several systems based on silver nanoparticles employed as pesticides colorimetric sensors in water will be also discussed. All of this with the aim to provide to readers a guide about recent advanced silver nanomaterials, used as colorimetric sensors in water.

show abstract

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles as Colorimetric Sensors for Water Pollutants

2020

View full text Add to dashboard Cite

show abstract

“…However, the poor chemical stability limits its application. So far, methods to protect silver film from oxidation and sulfuration mainly involve the use of bimetallic silver/gold layers [ 12 , 13 , 14 , 15 , 16 , 17 ], deposition of dielectric thin films [ 18 , 19 , 20 , 21 , 22 , 23 , 24 ] or polymers [ 25 ], and the use of self-assembled monolayers (SAM) [ 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. In the structure of silver/gold film, the silver was protected by an overlay of ca.15 nm-thick gold film [ 14 ], which is directly connected with the air or the sample solution.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the concentration of thiol molecules in solution could be detected. With the adsorption of cysteine on silver nanocubes, the detection level is down to 10 μM, and the SAM of cysteine is also a protecting layer [ 27 ]. Further, the adsorption of fewer than 60,000 1-hexadecanethiol molecules on a single silver nanoparticles, that is, 100 Zeptomole, is also achieved [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

A Sensitive and Stable Surface Plasmon Resonance Sensor Based on Monolayer Protected Silver Film

Wang

Yang

et al. 2017

Sensors

View full text Add to dashboard Cite

In this paper, we present a stable silver-based surface plasmon resonance (SPR) sensor using a self-assembled monolayer (SAM) as a protection layer and investigated its efficiency in water and 0.01 M phosphate buffered saline (PBS). By simulation, silver-based SPR sensor has a better performance in field enhancement and penetration depth than that of a gold-based SPR sensor, which are 5 and 1.4 times, respectively. To overcome the instability of the bare silver film and investigate the efficiency of the protected layer, the SAM of 11-mercapto-1-undecanol (MUD) was used as a protection layer. Stability experiment results show that the protected silver film exhibited excellent stability either in pure water or 0.01 M PBS buffer. The sensitivity of the silver-based SPR sensor was calculated to be 127.26 deg/RIU (refractive index unit), measured with different concentrations of NaCl solutions. Further, a very high refractive resolution for the silver-based SPR sensor was found to be 2.207 × 10−7 RIU, which reaches the theoretical limit in the wavelength of 632.8 nm for a SPR sensor reported in the literature. Using a mixed SAM of 16-mercaptohexadecanoic acid (MHDA) and a MUD layer with a ratio of 1:10, this immunosensor for the rabbit immunoglobulin G (IgG) molecule with a limit of detection as low as 22.516 ng/mL was achieved.

show abstract

“…† Similar RI sensitivity of Ag nanocubes have been observed earlier reports. In solution, Elfassy et al reported refractive index sensitivity of 125 nm per RIU for silver nanocubes of 50 nm side length 14 whereas RI sensitivity of 158 nm per RIU was observed by Martinsson et al for Ag nanocubes of 35 nm edge-length. 63 …”

Section: Resultsmentioning

confidence: 96%

“…Silver nanocubes (AgNCs) are anisotropic nanoparticles and are widely used in surface enhanced Raman scattering (SERS), 8–10 fluorescence enhancement, 11–13 refractive index based sensing 14–16 due to its strong plasmonic properties. The synthesis of different edge-length nanocube strongly depends on the reaction atmosphere.…”

Section: Introductionmentioning

confidence: 99%