A. Torrisi

Università degli Studi di Enna Kore

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L. Torrisi

University of Messina

133

M. Cutroneo

University of Messina

L. Silipigni

University of Messina

P. Wachulak

Military University of Technology in Warsaw

V. Havránek

Czech Academy of Sciences, Nuclear Physics Institute

Henryk Fiedorowicz

Military University of Technology in Warsaw

Andrzej Bartnik

Military University of Technology in Warsaw

ŁW

Łukasz Węgrzyński

Military University of Technology in Warsaw

Anna Macková

Czech Academy of Sciences, Nuclear Physics Institute

Tomasz Fok

Military University of Technology in Warsaw

Cooperative Institutions

University of Messina

Czech Academy of Sciences

University of Catania

Czech Academy of Sciences, Institute of Physics

Czech Academy of Sciences, Nuclear Physics Institute

Istituto Nazionale di Fisica Nucleare, Sezione di Catania

Institute for Microelectronics and Microsystems

University of Chemistry and Technology, Prague

Istituto Nazionale di Fisica Nucleare

Military University of Technology in Warsaw

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Unveiling the Potential of Vitamin D3 Orodispersible Films: A Comprehensive FTIR and UV–Vis Spectroscopic Study

Molecules (2024)

A. Torrisi M. Cutroneo L. Torrisi Salvatore Lavalle Alessia Forzina

Vitamin D3 is a crucial fat-soluble pro-hormone essential for bolstering bone health and fortifying immune responses within the human body. Orodispersible films (ODFs) serve as a noteworthy formulation strategically designed to enhance the rapid dissolution of vitamin D, thereby facilitating efficient absorption in patients. This innovative approach not only streamlines the assimilation process but also plays a pivotal role in optimizing patient compliance and therapeutic outcomes. The judicious utilization of such advancements underscores a paradigm shift in clinical strategies aimed at harnessing the full potential of vitamin D for improved patient well-being. This study aims to examine the vitamin D3 ODF structure using spectroscopic techniques to analyze interactions with excipients like mannitol. Fourier-transform infrared spectroscopy (FTIR) and ultraviolet–visible (UV–Vis) spectroscopy were utilized to assess molecular composition, intermolecular bonding, and vitamin D3 stability. Understanding these interactions is essential for optimizing ODF formulation, ensuring stability, enhancing bioavailability, and facilitating efficient production. Furthermore, this study involves a translational approach to interpreting chemical properties to develop an administration protocol for ODFs, aiming to maximize absorption and minimize waste. In conclusion, understanding the characterized chemical properties is pivotal for translating them into effective self-administration modalities for Vitamin D films.

10.3390/molecules29163762

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Graphene oxidation and reduction in medium vacuum by an UV lamp at 365 nm wavelength

Radiation effects and defects in solids (2024)

L. Torrisi M. Cutroneo Barbara Fazio Sabrina Conoci G. Salvato

The time-dependent graphene oxide (GO) reduction in medium vacuum under ultraviolet (UV) irradiation at 365 nm has been investigated. We found that GO exposed to UV at room temperature and at a vacuum of about 10−1 mbar shows a notable oxidation for irradiation times up to about 60 min followed by a successive reduction up to 210 min. Characterization measurements have been performed mainly using the Attenuated Total Reflectance (ATR) Fourier Transform Infrared (FTIR) and Raman spectroscopies. ATR-FTIR spectra, acquired in the (400–4000) cm−1 wavenumber range, have indicated an initial decrement of the IR transmission (oxidation process) with the exposure time up to about 60 min and a successive increase of the IR transmission (reduction process) for greater irradiation times up to 210 min. The IR transmission bands are attributed to the oxygen functional groups contained in GO which increase for low UV exposure times and gradually disappear during the UV-induced reduction process. Raman spectra confirm this interpretation showing a decrease of the AD/AG ratio value, with respect to the GO virgin value, for low UV exposure times and an increase for greater times. The GO oxidation and reduction processes, due to the UV GO treatment in medium vacuum conditions, have been also verified by energy dispersive X-ray fluorescence and surface wettability measurements.

Oxidation reduction

10.1080/10420150.2024.2346321

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Effects of the ion bombardment on the structure and composition of GO and rGO foils

Materials Chemistry and Physics (2019)

M. Cutroneo V. Havránek Anna Macková P. Malínský L. Torrisi

Elastic recoil detection

Rutherford backscattering spectrometry

Carbon fibers

10.1016/j.matchemphys.2019.04.075

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Citations (26)

Reduction of graphene oxide foils by IR laser irradiation in air

Journal of Instrumentation (2020)

L. Torrisi M. Cutroneo A. Torrisi G. Salvato E. Proverbio

10.1088/1748-0221/15/03/c03006

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Linear Energy Transfer (LET) dependence of graphene oxide dosimeter for different ionizing radiations

Vacuum (2022)

L. Torrisi L. Silipigni M. Cutroneo E. Proverbio A. Torrisi

Linear energy transfer

10.1016/j.vacuum.2022.111240

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Laser and electron beams physical analyses applied to the comparison between two silver tetradrachm greek coins

The European Physical Journal D (2008)

L. Torrisi G. Mondio A. M. Mezzasalma D. Margarone F. Caridi

10.1140/epjd/e2008-00240-x

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Citations (18)

Visible fluorescence in carbon dots deposited on silicon under energetic proton beams excitation

Journal of Nanoparticle Research (2025)

L. Torrisi V. Havránek P. Malínský Anna Macková D. Manno

Carbon fibers

10.1007/s11051-025-06255-9

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Linearity studies of HD-810 dosimeters by light ion beams

Radiation effects and defects in solids (2020)

A. Torrisi V. Havránek M. Cutroneo J. Vacı́k L. Torrisi

Radiochromic films (RCF), also called GafChromic™ films, represent a performant material for accurate quantitative radiation dosimetry. Their compositions allow high dose sensitivity and fewer environmental dependence, giving a good feedback to the absorbed dose value and to the active media absorption, turning color upon being irradiated. The RCF take into account their reduced response near the Bragg peak due to a high linear energy transfer (LET). HD-810 GafChromic™ films are tissue-equivalent, have easy optical readings and can be employed for ion dosimetry in radio diagnostic and therapy and for industrial applications. Such dosimeters were employed at Tandetron-Nuclear Physics Institute (Řež, Czech Republic) to study the responses of helium, proton and carbon beams, commonly employed in radiotherapy and microelectronics. The sensitivity of the detector is low enough to measure multiple-beam exposures. The induced effects by the ions in the energy range of 600 keV to 2.0 MeV were investigated in terms of optical absorbance, measured in the irradiated active region of the polymer. The employed ion dose range was between 40 Gy and 2.5 kGy. The experimental results show that the absorbance increases with the irradiation time (i.e. with the absorbed dose). The absorbance induced in the radio chromic film was measured at 673 nm, at which is observed the highest sensitivity of the films. Such data, together with the dose linearity and the dependence on the ion stopping power will be presented and discussed.

Absorbance

Stopping power

Linear energy transfer

Dose profile

Linearity

10.1080/10420150.2019.1701469

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Lithium encapsulation in etched nuclear pores in polyethylene terephthalate

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms (2020)

G. Ceccio Antonino Cannavò P. Horàk A. Torrisi V. Hnatowicz

Encapsulation

10.1016/j.nimb.2020.02.029

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Nanoimaging Using Soft X-Ray and EUV Sources Based on Double Stream Gas Puff Targets

Acta Physica Polonica A (2018)

P. Wachulak A. Torrisi Mesfin Amaru Ayele Andrzej Bartnik Łukasz Węgrzyński

In this work we present recent results on nanoscale imaging in the extreme ultraviolet and soft X-ray spectral ranges, describing three novel imaging systems dedicated for high spatial resolution imaging of nanoscale objects with the extreme ultraviolet and soft X-ray radiations.The extreme ultraviolet and soft X-ray full field microscopes operate at 13.8 nm and 2.88 nm wavelengths and are capable of imaging of nanostructures with a sub-50 nm spatial resolution.A soft X-ray contact microscope operates in the "water-window" spectral range from 2.3 to 4.4 nm wavelength, to obtain images of an internal structure of the investigated object in a thin surface layer of soft X-ray light sensitive photoresist.The development of such compact imaging systems may, in the near future, be important from the point of view of new research related to biological, material science, and nanotechnology applications.Such preliminary applications are also shown in the studies of biological samples, including carcinoma cells, diatoms, and neurons.

Extreme Ultraviolet Lithography

Soft X-rays

Extreme ultraviolet

10.12693/aphyspola.133.271

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Citations (1)