A highly efficient organophosphorus pesticides sensor based on CuO nanowires–SWCNTs hybrid nanocomposite

Acetylcholinesterase inhibition-based ultrasensitive fluorometric detection of malathion using unmodified silver nanoparticles

“…The limit of detection obtained was 0.556 fM, which was determined by using the formula 3/s, where is the standard deviation of ten blank responses and s is the slope of the calibration curve. The sensitivity of the developed method was found to be higher when compared with earlier detection methods, which involve AChE inhibition using a pH-sensitive fluorescence probe [2], AChEbased dipstick assay [23], emissive core-shell silica particles with tetraphenylethylene [24], and CuO nanowires-single-walled carbon nanotubes (CuO-SWCNTs) ( Table 1) [25].…”

Bridged β-cyclodextrin-functionalized MWCNT with higher supramolecular recognition capability: The simultaneous electrochemical determination of three phenols

“…Therefore, considerable efforts have been devoted in this field of supramolecular chemistry to design and synthesize various CD dimers with considerable structural diversity to achieve the cooperative binding processes (Zhang et al, 2013a). Some CD-functionalized CNT composites prepared by various methods, including noncovalent interactions and covalent sidewall coupling reactions have been widely used in electrochemical detection field (Huo et al, 2014;Gao et al, 2012;Ogoshi et al, 2007;Zhu et al, 2012). However, these studies are mainly focused on the natural CDs.…”

A Highly Efficient ZrO2 Nanoparticle Based Electrochemical Sensor for the Detection of Organophosphorus Pesticides

“…The calibration plot was presented in the inset of Figure 4, indicating that the responses were gradually saturated at a higher Omethoate concentration. To build up the calibration equation for real sample detection, a linear fit for the linear range was also presented in inset of obtained based on a signal-to-noise ratio of 3 which is better than that from previous report [6,8,11,12] listed in Table 1. The stability of the ZrO 2 NPs decorated APTES modified electrode could be maintained by storing at 25 ℃ in a dry condition.…”

“…De and Machado [10] used laboratory-prepared gold microelectrodes and square-wave voltammetry (SWV) technique for dichlorvos determination in pure and natural water samples, respectively. Huo et al [11] developed a new electrochemical sensor based on hybrid nanocomposite consisting of copper oxide nanowires (CuO NWs) and single-wall carbon nanotubes (SWCNTs) for the detection of OPs with a detection limit as low as 0.3 nmol•L −1 . Gong et al [12] fabricated a sensitive enzymeless OPs sensor by using Au nanoparticles (AuNPs) decorated graphene nanosheets (GNs) modified glassy carbon electrode to obtain a detection limit of 2.3 nmol•L −1 .…”