Leveraging ZnO morphologies in piezoelectric composites for mechanical energy harvesting

Cauda, Valentina; Stassi, Stefano; Lamberti, Andrea; Morello, Marco; Pirri, Candido Fabrizio; Canavese, Giancarlo

doi:10.1016/j.nanoen.2015.10.021

Cited by 41 publications

(26 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the hydrothermal synthesis, the coordination/electrostatic interactions allow hydroxyl groups (OH − ) to bind to Zn 2+ metal cations. The reaction between Zn 2+ ions and OH − groups form the growth unit

, from which ZnO can be obtained by dehydration, is as follows [ 28 ]: Zn 2 + + 2OH − → Zn(OH) 2

…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, it can be easily prepared in several high-surface-area morphologies by low-cost hydrothermal methods [ 17 , 18 ]. Some of them include nanotubes [ 19 ] and nanowires [ 20 , 21 ], nanobelts [ 22 ], nanorings [ 23 ], flower-like particles [ 24 , 25 ], nanosprings [ 26 ], multipods [ 27 , 28 ] and nanoparticles [ 29 ]. ZnO is a “generally recognized as safe” (GRAS), white, odorless inorganic solid compound.…”

Section: Introductionmentioning

confidence: 99%

“…To overcome some of the abovementioned limitations, ZnO has also been incorporated into various polymer materials such as Polyvinyl alcohol (PVA), Poly(methyl methacrylate) (PMMA), Polypropylene (PP), Polystyrene (PS), Polydimethylsiloxane (PDMS) or photocurable resins [ 28 , 33 , 34 , 35 ]. The advantages of this approach are manifold, especially for biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biodegradable and Drug-Eluting Inorganic Composites Based on Mesoporous Zinc Oxide for Urinary Stent Applications

et al. 2020

Self Cite

View full text Add to dashboard Cite

Conventional technologies for ureteral stent fabrication suffer from major inconveniences such as the development of encrustations and bacteria biofilm formation. These drawbacks typically lead to the failure of the device, significant patient discomfort and an additional surgery to remove and replace the stent in the worst cases. This work focuses on the preparation of a new nanocomposite material able to show drug elution properties, biodegradation and eventually potential antibacterial activity. Poly(2-hydroxyethyl methacrylate) or the crosslinked poly(2-hydroxyethyl methacrylate)-co-poly(acrylic acid) hydrogels were prepared by the radical polymerization method and combined with a biodegradable and antibacterial filling agent, i.e., flower-like Zinc Oxide (ZnO) micropowders obtained via the hydrothermal route. The physico-chemical analyses revealed the correct incorporation of ZnO within the hydrogel matrix and its highly mesoporous structure and surface area, ideal for drug incorporation. Two different anti-inflammatory drugs (Ibuprofen and Diclofenac) were loaded within each composite and the release profile was monitored up to two weeks in artificial urine (AU) and even at different pH values in AU to simulate pathological conditions. The addition of mesoporous ZnO micropowders to the hydrogel did not negatively affect the drug loading properties of the hydrogel and it was successfully allowed to mitigate undesirable burst-release effects. Furthermore, the sustained release of the drugs over time was observed at neutral pH, with kinetic constants (k) as low as 0.05 h−1. By exploiting the pH-tunable swelling properties of the hydrogel, an even more sustained release was achieved in acidic and alkaline conditions especially at short release times, with a further reduction of burst effects (k ≈ 0.01–0.02 h−1). The nanocomposite system herein proposed represents a new material formulation for preparing innovative drug eluting stents with intrinsic antibacterial properties.

show abstract

, from which ZnO can be obtained by dehydration, is as follows [ 28 ]: Zn 2 + + 2OH − → Zn(OH) 2

…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biodegradable and Drug-Eluting Inorganic Composites Based on Mesoporous Zinc Oxide for Urinary Stent Applications

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Several research groups showed that the morphological parameters of the NRs have a great influence over their piezoelectric properties: the higher the aspect ratio and/or the NRs density on the substrate, the higher the piezoelectric performance, as demonstrated by both theoretical and experimental investigations . This effect of the aspect ratio has been verified also when the NRs are dispersed as nanofillers in inert matrices, to form composites . Therefore, in order to realize high performance piezoelectric devices based on ZnO nanorods a high aspect ratio of the nanorods is of paramount importance.…”

Section: Introductionmentioning

confidence: 86%

Hydrothermally Grown ZnO Nanorods as Promising Materials for Low Cost Electronic Skin

et al. 2019

View full text Add to dashboard Cite

ZnO nanorods (NRs) are nanomaterials with a wide range of applications (photocatalysis, optoelectronics, catalysis, etc). One peculiar property of ZnO NRs is their piezoelectricity, which opens up a wealth of possibilities in the field of pressure sensors. In fact, thanks also to the recent availability of low cost hydrothermal growth, it is already possible to fabricate flexible, large area, self-powered, distributed pressure sensors, with a high potential for use in robotics and prosthetics as "electronic skins". This review focuses hence on ZnO NRs grown by the hydrothermal method, with an eye on the relationship between the reaction parameters and the resulting NRs morphology, and on their specific application in pressure sensing in terms of device design and performance.

show abstract

“…Accurate manipulation and fabrication of micro/nanomaterials in liquid is fundamental for a range of applications such as micro/nanoelectronics [1,2], biosensors [3,4], biomedicine [5,6], biosensing [7,8] and energy harvesting [9,10]. Various attempts have been made to make that happen.…”

Section: Introductionmentioning

confidence: 99%

A Review on Optoelectrokinetics-Based Manipulation and Fabrication of Micro/Nanomaterials

et al. 2020

View full text Add to dashboard Cite

Optoelectrokinetics (OEK), a fusion of optics, electrokinetics, and microfluidics, has been demonstrated to offer a series of extraordinary advantages in the manipulation and fabrication of micro/nanomaterials, such as requiring no mask, programmability, flexibility, and rapidness. In this paper, we summarize a variety of differently structured OEK chips, followed by a discussion on how they are fabricated and the ways in which they work. We also review how three differently sized polystyrene beads can be separated simultaneously, how a variety of nanoparticles can be assembled, and how micro/nanomaterials can be fabricated into functional devices. Another focus of our paper is on mask-free fabrication and assembly of hydrogel-based micro/nanostructures and its possible applications in biological fields. We provide a summary of the current challenges facing the OEK technique and its future prospects at the end of this paper.

show abstract

Leveraging ZnO morphologies in piezoelectric composites for mechanical energy harvesting

Cited by 41 publications

References 37 publications

Biodegradable and Drug-Eluting Inorganic Composites Based on Mesoporous Zinc Oxide for Urinary Stent Applications

Biodegradable and Drug-Eluting Inorganic Composites Based on Mesoporous Zinc Oxide for Urinary Stent Applications

Hydrothermally Grown ZnO Nanorods as Promising Materials for Low Cost Electronic Skin

A Review on Optoelectrokinetics-Based Manipulation and Fabrication of Micro/Nanomaterials

Contact Info

Product

Resources

About