L. Torrisi, V. Havranek, P. Malinsky, A. Mackova, D. Manno, A. Serra, A. Torrisi, M. Cutroneo
{"title":"Visible fluorescence in carbon dots deposited on silicon under energetic proton beams excitation","authors":"L. Torrisi, V. Havranek, P. Malinsky, A. Mackova, D. Manno, A. Serra, A. Torrisi, M. Cutroneo","doi":"10.1007/s11051-025-06255-9","DOIUrl":null,"url":null,"abstract":"<div><p>Carbon dots (CDs) have been obtained by laser ablation of charcoal in a biocompatible liquid and deposited as a thin film on a silicon substrate. A ns-pulsed Nd:YAG laser, operating at 1064 nm of wavelength, irradiates for times up to 3 h the solid carbon target placed into a phosphate-buffered saline (PBS) solution and distilled water, to prepare the CDs dispersion. The prepared thin film on silicon, under a UV lamp at 365 nm in air generates fluorescence in the visible region, with a band around 470 nm, with a blue color. Further investigations concern the thin-film irradiation using 0.8–3.0 MeV protons with 3 nA current in a vacuum, showing also fluorescence in the visible region, from about 400 up to 700 nm, as recorded by a suitable optical spectrometer. The practical applications of CDs are also presented especially in the biomedical field and in the dosimetry ambit, where they can be employed for bioimaging, diagnostics, and therapy.</p></div>","PeriodicalId":653,"journal":{"name":"Journal of Nanoparticle Research","volume":"27 3","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nanoparticle Research","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11051-025-06255-9","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Carbon dots (CDs) have been obtained by laser ablation of charcoal in a biocompatible liquid and deposited as a thin film on a silicon substrate. A ns-pulsed Nd:YAG laser, operating at 1064 nm of wavelength, irradiates for times up to 3 h the solid carbon target placed into a phosphate-buffered saline (PBS) solution and distilled water, to prepare the CDs dispersion. The prepared thin film on silicon, under a UV lamp at 365 nm in air generates fluorescence in the visible region, with a band around 470 nm, with a blue color. Further investigations concern the thin-film irradiation using 0.8–3.0 MeV protons with 3 nA current in a vacuum, showing also fluorescence in the visible region, from about 400 up to 700 nm, as recorded by a suitable optical spectrometer. The practical applications of CDs are also presented especially in the biomedical field and in the dosimetry ambit, where they can be employed for bioimaging, diagnostics, and therapy.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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