ZnO nanostructures directly grown on paper and bacterial cellulose substrates without any surface modification layer

Costa, Saionara V.; Gonçalves, Alícia Ferreira; Zaguete, Maria A.; Mazon, Talita; Nogueira, Ana F.

doi:10.1039/c3cc43152e

Cited by 52 publications

(26 citation statements)

References 26 publications

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“…Paper also provides a good support for growing nanostructures by providing a template for orientation and nucleation sites. This has been demonstrated in previous studies including our attempt to grow ZnO nanorods on paper by various protocols 5 6 7 8 . Paper has been widely used as substrate for many μPAD devices and blood plasma separation 9 10 , there are very few studies reporting the use of paper devices for protein preconcentration 11 12 13 .…”

supporting

confidence: 69%

“…Zinc oxide nanorods were grown on a Whatman filter paper no.1 via the standard hydrothermal route 5 . Paper substrate favors the growth of oriented micro or nanostructures due to the inherently oriented and organized cellulose fiber network 6 . Nanostructures based on Zinc oxide (ZnO) have excellent biocompatibility are non-toxic, chemically stabile and have a high isoelectric point i.e.…”

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confidence: 99%

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Zinc oxide nanorods functionalized paper for protein preconcentration in biodiagnostics

Tiwari

Vinchurkar

Rao

et al. 2017

Sci Rep

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Distinguishing a specific biomarker from a biofluid sample containing a large variety of proteins often requires the selective preconcentration of that particular biomarker to a detectable level for analysis. Low-cost, paper-based device is an emerging opportunity in diagnostics. In the present study, we report a novel Zinc oxide nanorods functionalized paper platform for the preconcentration of Myoglobin, a cardiac biomarker. Zinc oxide nanorods were grown on a Whatman filter paper no. 1 via the standard hydrothermal route. The growth of Zinc oxide nanorods on paper was confirmed by a combination of techniques consisting of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS,) scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDX) analysis. The Zinc oxide nanorods modified Whatman filter paper (ZnO-NRs/WFP) was further tested for use as a protein preconcentrator. Paper-based ELISA was performed for determination of pre-concentration of cardiac marker protein Myoglobin using the new ZnO-NRs/WFP platform. The ZnO-NRs/WFP could efficiently capture the biomarker even from a very dilute solution (Myoglobin < 50 nM). Our ELISA results show a threefold enhancement in protein capture with ZnO-NRs/WFP compared to unmodified Whatman filter paper, allowing accurate protein analysis and showing the diagnostic concept.

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confidence: 69%

mentioning

confidence: 99%

Zinc oxide nanorods functionalized paper for protein preconcentration in biodiagnostics

Tiwari

Vinchurkar

Rao

et al. 2017

Sci Rep

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“…The chemical bath deposition (CBD) is a technique that apart from being simple and economic allows synthesizing nanostructures with different morphologies at temperatures around 90 C on various substrates [14,15]. The chemical bath can take place in aqueous solution where the mechanism leading to the formation of ZnO crystals involves the crystallization phenomenon, dissolution, and recrystallization [16].…”

Section: Introductionmentioning

confidence: 99%

ZnO nanorods/graphene oxide sheets prepared by chemical bath deposition for volatile organic compounds detection

Vessalli

Zito

Perfecto

et al. 2017

Journal of Alloys and Compounds

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a b s t r a c tGraphene-based composites have emerged as gas sensor due to the possibility to obtain higher surface area with additional functional groups. In this paper, ZnO nanorods (ZnO-NR) with controlled size and morphology were grown via chemical bath deposition in mild temperature (90 C) over gold interdigital tracks deposited on an alumina substrate. Furthermore, it was also possible to obtain by the same method composites with graphene oxide sheets below ZnO-NR structures (GO/ZnO-NR) or ZnO-NR between GO sheets (GO/ZnO-NR/GO) when GO is placed in the bath during the growth of GO/ZnO-NR. The samples were characterized by Raman spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy. These structures were tested as sensors of volatile organic compounds (VOCs), such as acetone, benzene, ethanol and methanol in the concentration range of 10e500 parts per million (ppm). It was found that the optimum working temperature of all sensors was 450 C. The GO/ ZnO-NR/GO composite showed better selectivity due to GO functional groups. In the case of our welldesigned sensors, we found that the dominant oxygen species (O 2-) on ZnO-NR surface were responsible for the sensors response. These findings offer a new viewpoint for further advance of the sensing performance of one-dimensional ZnO/GO nanocomposites VOCs sensors.

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“…Since it is possible to grow ZnO nanorods on a wide variety of different substrates, it may also be possible to effectively grow our sensors on a wide variety of substrates. An example of this that relates to our sensors specifically could be realized by growing ZnO on a ITO glass slide (as we do) and integrating it into a work bench in a hospital.…”

Section: Discussionmentioning

confidence: 99%

Novel Solid‐State Microbial Sensors Based on ZnO Nanorod Arrays

Landry

Burns

Baerlocher

et al. 2018

Adv Funct Materials

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Gravity and magnetism are implemented to change the morphology of zinc oxide nanorod sensors during synthesis. The effects of gravity and magnetism can translate into future application of these nanorods through cost-effective, environmentally friendly, and easy-to-use biosensor technology with the quickest available sensing. The sensors can pave the way toward detection of both bacteria and fungi present on the surface with high sensitivity. This ability to sense microorganisms in a "non-solution-based" environment represents a key step forward in the fields of health and food safety, as well as solid-state nanomaterial biotechnology applications. Hundreds of thousands of people are affected each year by accidental contamination and current protocols are far from preventative. The results of the magnetic field studies when compared with previous results show that the following factors affect the outcome of applying magnetic field during the growth of nanorods on their morphology: the direction of growth with respect to gravity, the method of seeding, and the substrate.

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ZnO nanostructures directly grown on paper and bacterial cellulose substrates without any surface modification layer

Cited by 52 publications

References 26 publications

Zinc oxide nanorods functionalized paper for protein preconcentration in biodiagnostics

Zinc oxide nanorods functionalized paper for protein preconcentration in biodiagnostics

ZnO nanorods/graphene oxide sheets prepared by chemical bath deposition for volatile organic compounds detection

Novel Solid‐State Microbial Sensors Based on ZnO Nanorod Arrays

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