l-cysteine protected copper nanoparticles as colorimetric sensor for mercuric ions

Soomro, Razium Ali; Nafady, Ayman; Sirajuddin, Sirajuddin; Memon, Najma; Sherazi, Syed Tufail Hussain; Kalwar, Nazar Hussain

doi:10.1016/j.talanta.2014.07.023

Cited by 118 publications

(43 citation statements)

References 53 publications

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“…While plasmonic nanosensors are almost exclusively made of gold or silver, LSPR sensing applications of other metal and/or metal oxide nanocomposites, e.g., zinc oxide [78][79][80], aluminium [81][82][83][84][85][86][87] and copper [88][89][90][91][92][93][94][95][96], have also been investigated. However, the non-noble metals are susceptible to corrosion in aqueous environments and oxidation in air, both of which significantly diminish refractive index sensitivity [4].…”

Section: Effect Of Nanoparticle Composition Size and Shape On Plasmomentioning

confidence: 99%

Strategies for enhancing the sensitivity of plasmonic nanosensors

et al. 2015

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Based on the localized surface plasmon resonance (LSPR) of metallic nanoparticles, plasmonic nanosensors have emerged as a powerful tool for biosensing applications. Many detection schemes have been developed and the field is rapidly growing to incorporate new methodologies and applications. Amidst all the ongoing research efforts, one common factor remains a key driving force: continued improvement of high-sensitivity detection. Although there are many excellent reviews available that describe the general progress of LSPR-based plasmonic biosensors, there has been limited attention to strategies for improving the sensitivity of plasmonic nanosensors. Recognizing the importance of this subject, this review highlights recent progress on different strategies used for improving the sensitivity of plasmonic nanosensors. These strategies are classified into the following three categories based on their different sensing mechanisms: (1) sensing based on target-induced local refractive index changes, (2) colorimetric sensing based on LSPR coupling, and (3) amplification of detection sensitivity based on nanoparticle growth. The basic principles and cutting-edge examples are provided for each kind of strategy, collectively forming a unifying framework to view the latest attempts to improve the sensitivity of nanoplasmonic sensors. Future trends for the fabrication of improved plasmonic nanosensors are also discussed.

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Section: Effect Of Nanoparticle Composition Size and Shape On Plasmomentioning

confidence: 99%

Strategies for enhancing the sensitivity of plasmonic nanosensors

et al. 2015

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“…The pH of the precursor has been varied from 2 to 8 to obtain colloids E 1 to E 7 . Strong basic medium has been avoided to defy the formation of copper oxides [49]. The UV-vis spectral profiles of A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 14 CuNPs prepared under different pH are shown in figure 3(b).…”

Section: E) Effect Of Ph Of the Precursor Solutionmentioning

confidence: 99%

Microwave-assisted rapid synthesis of copper nanoparticles with exceptional stability and their multifaceted applications

Sreeju¹,

Rufus²,

Philip³

2016

Journal of Molecular Liquids

112

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“…The corresponding inset plot shows an R 2 value of 0.9951 with LOD of 12 nM and LOQ of 40 nM. The LOD and LOQ values were determined by the methods reported previously [9,24]. Although the electrode was checked for 100-3600 nM nitrite concentration and was giving good results but the former range was producing the higher linearity and thus chosen for better accuracy.…”

Section: Amperometric Calibrationmentioning

confidence: 99%

Construction of an Ultrasensitive and Highly Selective Nitrite Sensor Using Piroxicam-Derived Copper Oxide Nanostructures

et al. 2018

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Abstract:In this work, piroxicam-based copper oxide nanostructures (Px-CuO NSs) were synthesized via hydrothermal precipitation in the presence of ammonia. The prepared Px-CuO NSs were subjected to scanning electron microscopy (SEM) and X-ray diffraction (XRD) to obtain morphology and crystallinity, respectively. The SEM study reveals that these Px-CuO NSs are in the form of porous rose-like nanopetals with dotted particles on their surface, while the XRD study confirms their crystalline nature. The Px-CuO NS-based sensors were fabricated by drop-casting them onto the surface of a glassy carbon electrode (GCE) and they were tested for nitrite detection using voltammetry and amperometry. The results show these Px-CuO NSs to be highly stable on the GCE surface with linear amperometric (current vs. time) responses to wide range of nitrite concentrations from 100 to 1800 nM, with limits of detection (LOD) and quantification (LOQ) being 12 nM and 40 nM, respectively. Importantly, the fabricated sensor showed negligible effects for a 10-fold higher concentration of common interfering agents and exhibited excellent selectivity. It was applied successfully for nitrite detection in water samples such as river water, mineral water, and tap water.

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l-cysteine protected copper nanoparticles as colorimetric sensor for mercuric ions

Cited by 118 publications

References 53 publications

Strategies for enhancing the sensitivity of plasmonic nanosensors

Strategies for enhancing the sensitivity of plasmonic nanosensors

Microwave-assisted rapid synthesis of copper nanoparticles with exceptional stability and their multifaceted applications

Construction of an Ultrasensitive and Highly Selective Nitrite Sensor Using Piroxicam-Derived Copper Oxide Nanostructures

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