Manipulation of pH induced sensitivity of a fluorescent probe in presence of silver nanoparticles

Kaçmaz, Sibel; Ertekin, Kadriye; Öter, Özlem; Hızlıateş, Cevher Gündoğdu; Ergün, Yavuz; Çelik, Erdal

doi:10.1016/j.jlumin.2015.07.056

Cited by 3 publications

(5 citation statements)

References 34 publications

(39 reference statements)

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“…The nitroxyl radical of TEMPO was used as a stable form of NO. We constructed optical chemical sensors in the form of thin films and electrospun fibers prepared from different cocktail compositions (P1-P9) of plasticized PVC (see Tables 2 and 3 25 Oter et al designed a gaseous CO 2 sensor by exploiting ionic liquids that enhanced the long-term stability of their sensor. 30 We also tested the sensing agents in three different moieties: ultrapure water, phosphate buffer at pH 7.4, and SDS micelles.…”

Section: Spectral Response Of the Pyrene Dye To Tempo Radicalmentioning

confidence: 99%

“…Our previous studies encouraged us to use ionic liquids and silver nanoparticles as additives for the enhancement of the sensor response. 24,25,30 Ozturk et al utilized silver nanoparticles for oxygen sensing purposes and obtained many advantages such as linear calibration plot, tuned sensitivity, and wide concentration range. 24 Kacmaz et al manipulated the pH induced sensitivity of the sensing agent by utilizing silver nanoparticles.…”

Section: Spectral Response Of the Pyrene Dye To Tempo Radicalmentioning

confidence: 99%

“…24 Kacmaz et al manipulated the pH induced sensitivity of the sensing agent by utilizing silver nanoparticles. 25 Oter et al designed a gaseous CO 2 sensor by exploiting ionic liquids that enhanced the long-term stability of their sensor. 30 We also tested the sensing agents in three different moieties: ultrapure water, phosphate buffer at pH 7.4, and SDS micelles.…”

Section: Spectral Response Of the Pyrene Dye To Tempo Radicalmentioning

confidence: 99%

“…The sensing dyes were entrapped in both thin film and electrospun membranes in the presence and absence of different additives such as nanosized silver and ionic liquids, which are known as effective on the fluorescence characteristics of the sensing agents and facilitate the detection capability of the sensing probe. 25 Thus, these additives were utilized for the first time for nitric oxide sensing purposes and a significant enhancement of sensor response was obtained. The obtained limit of detection values of 10 −7 mol L −1 are less than most of the LOD levels given in the literature for solid phase optical sensors.…”

Section: Introductionmentioning

confidence: 99%

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Development of a nanoscale-based optical chemical sensor for the detection of NO radical

Öter¹,

Aydin²,

Ongun³

et al. 2018

Turk J Chem

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Nitric oxide is one of the most important biochemical parameters in biological processes; it is also known as carcinogenic. There is need for the design of stable and durable solid phase nitric oxide sensors. In this study, we immobilized the nitric oxide sensitive molecules pyrene, tris(2,2'-bipyrdyl)dichlororuthenium(II) hexahydrate (Ru(bipy) 2+3 ) , and magnesium phthalocyanine (Mg-Pc) for the first time in polymeric or glassy matrices. We applied silver nanoparticles and ionic liquids in the fabrication process of polymeric electrospun fibers and thin films. We compared their NO sensitivity in micelle solutions that mimic the cell medium by both steady state and lifetime-based fluorescence measurements. Among the tested dyes, the pyrene exhibited the highest response for radicalic NO. The Mg-Pc dye followed pyrene in terms of sensitivity and exhibited increasing fluorescence intensity and lifetime-based response. Lifetime-based response is advantageous and selective as it is not affected by source variations, photo-bleaching, or leaching effects.Another advantage of Mg-Pc dye is that it is not poisonous for organic systems. Presence of the ionic liquid enhanced the sensor response in all of the test moieties. The obtained limit of detection values for pyrene, Ru(bipy) 2+ 3and Mg-Pc dyes were 0.15 µ M, 1.54 µ M, and 0.78 µ M, respectively.

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Section: Spectral Response Of the Pyrene Dye To Tempo Radicalmentioning

confidence: 99%

Section: Spectral Response Of the Pyrene Dye To Tempo Radicalmentioning

confidence: 99%

Section: Spectral Response Of the Pyrene Dye To Tempo Radicalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of a nanoscale-based optical chemical sensor for the detection of NO radical

Öter¹,

Aydin²,

Ongun³

et al. 2018

Turk J Chem

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“…The decrease in the magnitude of the potential (less negative) with decreasing pH is most likely the result of decreasing OHconcentration which generates a negative surface charge in alkaline pH environments [2]. The charge of the polymer chains can easily be tuned by altering the pH of the solutions with the introducing of silver particles [3].…”

Section: Introductionmentioning

confidence: 99%

Silver Rubber-Hydrogel Nanocomposite as pH-Sensitive Prepared by Gamma Radiation: Part II

El-Sayyad¹

2020

PSPRJ

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Sliver rubber-hydrogel (Natural Rubber Latex/poly acrylamide/poly methacrylic acid)/silver nanocomposites have been fabricated using gamma radiation techniques. The hydride mixtures of natural rubber latex(NRL) and acrylamide/methacrylic acid (AM/MAA) co-monomer dissolved in 50mL of (0.01 mol) AgNO3 solution and irradiated at 20kGy. Gamma radiation induced combined effect, the crosslinking of NRL/AM/MAA and in situ reduction of Ag+ ions at ambient conditions. A silver nanoparticle (AgNPs) was embedded in crosslinking rubber-hydrogel of (NRL/PAM/PMAA) matrices, resulting in a very uniform dispersion with (30nm) diameter. The pH controlled of sliver rubber-hydrogel of (NRL/ PAM/PMAA)/ Agby alternately the swelling degree of hybrid rubber-hydrogel matrices was evaluated. The effect of silver nanoparticles in-situ in (NRL/PAM/PMAA) matrices on the optical properties of composite films is studied experimentally. The (ATR-FTIR) spectrum and thermal analysis (DSC/TGA) results of the prepared rubber hydrogel showed pure one phase suggesting that there are fully miscible between rubber and hydrogel phases.

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Enhanced Luminescence Based Response towards pH in Highly Acidic Environments by the Silver Nanoparticles and Ionic Liquids

et al. 2019

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Manipulation of pH induced sensitivity of a fluorescent probe in presence of silver nanoparticles

Cited by 3 publications

References 34 publications

Development of a nanoscale-based optical chemical sensor for the detection of NO radical

Development of a nanoscale-based optical chemical sensor for the detection of NO radical

Silver Rubber-Hydrogel Nanocomposite as pH-Sensitive Prepared by Gamma Radiation: Part II

Enhanced Luminescence Based Response towards pH in Highly Acidic Environments by the Silver Nanoparticles and Ionic Liquids

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