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30 results on '"De Matteis, Valeria"'

1. Shape-Driven Response of Gold Nanoparticles to X-rays

Author

Tarantino, Simona, primary, Capomolla, Caterina, additional, Carlà, Alessandra, additional, Giotta, Livia, additional, Cascione, Mariafrancesca, additional, Ingrosso, Chiara, additional, Scarpa, Edoardo, additional, Rizzello, Loris, additional, Caricato, Anna Paola, additional, Rinaldi, Rosaria, additional, and De Matteis, Valeria, additional

Published
2023
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28. Investigation of the Effects of Pulse-Atomic Force Nanolithography Parameters on 2.5D Nanostructures’ Morphology

Author

Paolo Pellegrino, Isabella Farella, Mariafrancesca Cascione, Valeria De Matteis, Alessandro Paolo Bramanti, Antonio Della Torre, Fabio Quaranta, Rosaria Rinaldi, Pellegrino, Paolo, Farella, Isabella, Cascione, Mariafrancesca, DE MATTEIS, Valeria, Bramanti, ALESSANDRO PAOLO, Della Torre, Antonio, Quaranta, Fabio, and Rinaldi, Rosaria

Subjects
AFM-based nanofabrication, atomic force-nanolithography, pulse-atomic force nanolithography, atomic force microscopy, General Chemical Engineering, AFM-based nanofabrication, atomic force microscopy, atomic force-nanolithography, pulse-atomic force nanolithography, General Materials Science
Abstract

In recent years, Atomic Force Microscope (AFM)-based nanolithography techniques have emerged as a very powerful approach for the machining of countless types of nanostructures. However, the conventional AFM-based nanolithography methods suffer from low efficiency, low rate of patterning, and high complexity of execution. In this frame, we first developed an easy and effective nanopatterning technique, termed Pulse-Atomic Force Lithography (P-AFL), with which we were able to pattern 2.5D nanogrooves on a thin polymer layer. Indeed, for the first time, we patterned nanogrooves with either constant or varying depth profiles, with sub-nanometre resolution, high accuracy, and reproducibility. In this paper, we present the results on the investigation of the effects of P-AFL parameters on 2.5D nanostructures’ morphology. We considered three main P-AFL parameters, i.e., the pulse’s amplitude (setpoint), the pulses’ width, and the distance between the following indentations (step), and we patterned arrays of grooves after a precise and well-established variation of the aforementioned parameters. Optimizing the nanolithography process, in terms of patterning time and nanostructures quality, we realized unconventional shape nanostructures with high accuracy and fidelity. Finally, a scanning electron microscope was used to confirm that P-AFL does not induce any damage on AFM tips used to pattern the nanostructures.

Published
2022

29. AFM Characterization of Halloysite Clay Nanocomposites’ Superficial Properties: Current State-of-the-Art and Perspectives

Author

Mariafrancesca Cascione, Valeria De Matteis, Francesca Persano, Stefano Leporatti, Cascione, Mariafrancesca, DE MATTEIS, Valeria, Persano, Francesca, and Leporatti, Stefano

Subjects
atomic force microscopy, halloysite clay nanotubes, nanocomposites, surface properties, General Materials Science
Abstract

Natural halloysite clay nanotubes (HNTs) are versatile inorganic reinforcing materials for creating hybrid composites. Upon doping HNTs with polymers, coating, or loading them with bioactive molecules, the production of novel nanocomposites is possible, having specific features for several applications. To investigate HNTs composites nanostructures, AFM is a very powerful tool since it allows for performing nano-topographic and morpho-mechanical measurements in any environment (air or liquid) without treatment of samples, like electron microscopes require. In this review, we aimed to provide an overview of recent AFM investigations of HNTs and HNT nanocomposites for unveiling hidden characteristics inside them envisaging future perspectives for AFM as a smart device in nanomaterials characterization.

Published
2022

30. Noble Metals and Soft Bio-Inspired Nanoparticles in Retinal Diseases Treatment: A Perspective

Author

Valeria De Matteis, Loris Rizzello, De Matteis, Valeria, and Rizzello, Loris

Subjects
0301 basic medicine, Materials science, Metal Nanoparticles, Nanoparticle, Nanotechnology, Review, 02 engineering and technology, General Medicine, bio-inspired NP, 021001 nanoscience & nanotechnology, Polymeric nanoparticles, 03 medical and health sciences, 030104 developmental biology, retinal diseases, bio-inspired nps, lcsh:Biology (General), noble metals nps, drug delivery, Humans, noble metals NP, Nonionic surfactant, 0210 nano-technology, lcsh:QH301-705.5
Abstract

We are witnessing an exponential increase in the use of different nanomaterials in a plethora of biomedical fields. We are all aware of how nanoparticles (NPs) have influenced and revolutionized the way we supply drugs or how to use them as therapeutic agents thanks to their tunable physico-chemical properties. However, there is still a niche of applications where NP have not yet been widely explored. This is the field of ocular delivery and NP-based therapy, which characterizes the topic of the current review. In particular, many efforts are being made to develop nanosystems capable of reaching deeper sections of the eye such as the retina. Particular attention will be given here to noble metal (gold and silver), and to polymeric nanoparticles, systems consisting of lipid bilayers such as liposomes or vesicles based on nonionic surfactant. We will report here the most relevant literature on the use of different types of NPs for an efficient delivery of drugs and bio-macromolecules to the eyes or as active therapeutic tools.

Published
2020

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