Nanoimmunosensor based on ZnO nanorods for ultrasensitive detection of 17β-Estradiol

A molecularly imprinted fiber array solid-phase microextraction strategy for simultaneous detection of multiple estrogens

“…A variety of serious adverse effects arise, such as abnormalities in the immune system and disturbance in the balance of the endocrine system, [4][5][6] which lead to sterility and atrophy of the reproductive organs. [7][8][9] In particular, the high activity of E2 may have toxic effects on the organism even at concentrations as low as ng L À1 .…”

“…2,3 However, E2 residues in the environment, eggs, milk and meat possibly get into the human body through the food chain, resulting in bioaccumulation. A variety of serious adverse effects arise, such as abnormalities in the immune system and disturbance in the balance of the endocrine system, 4–6 which lead to sterility and atrophy of the reproductive organs. 7–9 In particular, the high activity of E2 may have toxic effects on the organism even at concentrations as low as ng L −1 .…”

ZnO Nanorod Integrated Flexible Carbon Fibers for Sweat Cortisol Detection

“…19,20 The isoelectric point (IEP) of ZnO is high (9.5) and provides positively charged surfaces for the adsorption of relatively negatively charged enzymes/antibodies (IEP ≃ 4.5). 21,22 Moreover, ZnO has good chemical stability and biocompatibility. ZnO can also absorb oxygen atoms to enhance the charge transfer coefficients and work function with increased active sites for improved sensing performances.…”

“…The functional and mechanical properties of carbon fibers can be enhanced if required by integrating nanostructured materials. For instance, the transition metal oxide/hydroxide integrated carbon cloths have been evaluated for sensing and energy storage performances. , Different types of metal oxide nanostructures such as Fe 2 O 3 , TiO 2 , ZnO, and SnO 2 along with their composites have been widely used in enzymatic biosensors. − Among these, ZnO and its nanocomposites, due to their unique mechanical characteristics and nontoxic properties, have received much attention. , The isoelectric point (IEP) of ZnO is high (9.5) and provides positively charged surfaces for the adsorption of relatively negatively charged enzymes/antibodies (IEP ≃ 4.5). , Moreover, ZnO has good chemical stability and biocompatibility. ZnO can also absorb oxygen atoms to enhance the charge transfer coefficients and work function with increased active sites for improved sensing performances .…”

Recent Progress on Fabrication of Zinc Oxide Nanorod-based Field Effect Transistor Biosensors

“…Many studies on biosensors has utilizing on different morphologies of ZnO nanostructures, such as nanoparticles (Mahmoud et al 2019;Medawar-Aguilar et al 2019), nanofilms (Agarwal et al 2019;Zhai et al Zinc oxide (ZnO) is an attractive biomaterial for its versatile properties such as semiconducting (wide bandgap of 3.37 eV), bio-safe and biocompatible with high isoelectric point of ~9.5. ZnO nanostructures can be prepared using various methods such as spin-coating (Bangbai et al 2013;Mahmood et al 2019), hydrothermal Zhang et al 2019), spray pyrolysis (Dedova et al 2019), radio frequency (RF) magnetron sputtering (Baratto 2018;Ching et al 2014), chemical (Saranya et al 2017;, nanosheets (Ahmad et al 2015) and nanorods (Baratto et al 2018;Fathollahzadeh et al 2018;Mahmood et al 2019) 2019), nanosheets (Yue et al 2019a), nanoflowers (Yue et al 2019b), nanorods (Ahmad et al 2017;Ridhuan et al 2018;Singh et al 2019a) and nanowires (Ditshego 2018). For instance, ZnO nanosheets has been utilized for biosensing matrix to detect uric acid (Ahmad et al 2015a).…”