2-Mercaptoethanesulfonate (MES) anion-functionalized silver nanoparticles as an efficient SERS-based sensor of metal cations

Zinc(II) Ion Sensing in Aqueous Micellar Solution Using Modified Bipyridine‐Based “Turn‐On” Fluorescent Probes and its Application in Bioimaging

“…All our fluorescences tudies were thus performed at the optimal pH 6. With an increase in pH, the fluorescencei ntensity decreased, with an interesting observation at pH [8][9][10]. At that pH range, we observed ar edshift in the spectra with sudden decrease in fluorescencei ntensity ( Figure S5).…”

“…Piotrowski et al. have reported the first SERS sensor for alkaline and alkaline earth metals by using 2‐ mercaptoethane sulfonate (MES)‐functionalized silver nanoparticles . The advantage of optical sensors is their high sensitivity, whereas the main drawback is less reproducibility.…”

“…have reportedt he first SERS sensor for alkaline and alkaline earth metals by using 2-mercaptoethane sulfonate (MES)-functionalized silver nanoparticles. [10] The advantage of opticals ensors is their high sensitivity,w hereas the main drawback is less reproducibility.I nf luorescence-based methods, Hu et al have used Fçrster resonance energy transfer (FRET)b etween functionalized quantum dots and rhodamine 6G for the detection of Hg 2 + . [11] Gupta et al also detected Hg 2 + using fluorescence of an itrogen-dopedt hiol-functionalized carbon dot sensor.…”

Plasmonic nanoparticles in chemical analysis

“…For example, Piotrowski and Bukowska showed that silver nanoparticles covered by the monolayer of mercaptoethanesulfonate can serve as a sensor for many metal cations. 101 Sulfonate groups of mercaptoethanesulfonate may form contact-ion pairs with metal cations, and therefore n s (SO 3 À ) band can be split into two components, one at a higher wavenumber (1065 cm À1 ) for sulfonic groups interacting directly with co-adsorbed cations and one at a lower wavenumber (1040 cm À1 ) for sulfonic groups which are not involved in the formation of direct bonds with co-adsorbed cations. Piotrowski and Bukowska demonstrated a big potential of such functionalized Ag nanoparticles for detection of a great variety of cations, including alkaline and alkaline earth metal cations, down to 10 À8 M in the case of Ca 2+ .…”

Catalytic Chemosensing Assay for Selective Detection of Methyl Parathion Organophosphate Pesticide

“…[1] Through the highly selectiveq ualitative and quantitative detection of at arget analyte, its pharmacological activity,c hemical toxicity,a nd bioavailability can be accurately evaluated for various purposes, including medical diagnosis, [2] environmental monitoring, [3] food safety, [4] and drug discovery. [5] As ac ommon designp ractice, ac hemosensor [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] generally comprises ar eceptor and a signaling unit ensemble that operates by either ad isplacement [6][7][8][9][10][11][12] or an intrinsic [13][14][15][16][17][18][19][20][21][22] sensing mechanism.E fforts to optimize chemosensing selectivity have been extensive and generally focused on modifying the design of the receptors to differentiate amongs pecies such as cations, [15][16][17] anions, [10,12,13,…”