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Nanomaterials
Special Issues
Recent Developments in Luminescent Nanomaterials
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Recent Developments in Luminescent Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanocomposite Materials".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 4984

Special Issue Editors

Prof. Laeticia Petit

E-Mail Website
Guest Editor
Photonics Laboratory, Tampere University, Korkeakoulunkatu 3, 33720 Tampere, Finland
Interests: glass; glass-ceramic; luminescence; fiber; film; crystals
Special Issues, Collections and Topics in MDPI journals
Dr. Rajesh Komban

E-Mail Website
Co-Guest Editor
Fraunhofer Center for Applied Nanotechnology CAN (a research division of Fraunhofer-IAP, Golm, Germany)Address: Grindelallee -117, 20146 Hamburg, Germany
Interests: chemical nanotechnology; development of new materials; luminescent nanomaterials; functionalization and nanocomposites

Special Issue Information

Dear Colleagues,

Nanotechnology is a multidisciplinary science that deals with physics, chemistry, materials science, and other engineering sciences. Research on the development of new nanosystems based on luminescent nanomaterials has been considered important in recent years from a technological point of view, as their application has spread in almost all branches of science and technology, due to the distinct spectroscopic properties of the lanthanide/rare earth ions present in the luminescent nanomaterials, such as the down shifting, down converting, upconverting, and persistent nanomaterials which can contribute profusely in this regard. In general, these luminescent nanomaterials have found applications in classic technologies such as in fluorescent lamps, light-emitting diodes, emission displays, X-ray detectors, in life science applications, and in tomography.

Research studies on the nanosystems of luminescent nanoparticles including (but not limited to) rare-earth-based luminescent nanomaterials in polymers, glasses, and as composites, and their synthesis methods, integration, and characterization techniques are invited to this Special Issue. Papers may also contain any aspects related to technologies and the fabrication/testing of new devices—especially in applications such as security, biological labelling, sensing, photovoltaics, and other innovative applications.

Prof. Laeticia Petit
Dr. Rajesh Komban
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • new luminescent nanomaterials
  • persistent luminescent nanomaterials
  • upconversion nanomaterials
  • nanophosphors
  • luminescent nanomaterials in polymers, glasses, and as composites
  • advanced processing and integration
  • nanomaterials-based devices

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Published Papers (3 papers)

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Research

11 pages, 3000 KiB  
Article
CuInS2 Nanocrystals Embedded PMMA Composite Films: Adjustment of Polymer Molecule Weights and Application in Remote-Type White LEDs
by Qingchao Zhou and Zhongyi Shang
Nanomaterials 2023, 13(6), 1085; https://doi.org/10.3390/nano13061085 - 17 Mar 2023
Cited by 2 | Viewed by 1508
Abstract
The commercial application of colloidal semiconductor nanocrystals has been realized owing to the development of composite film technology. Here, we demonstrated the fabrication of green and red emissive CuInS2 nanocrystals embedded polymer composite films of equal thickness by using a precise solution [...] Read more.
The commercial application of colloidal semiconductor nanocrystals has been realized owing to the development of composite film technology. Here, we demonstrated the fabrication of green and red emissive CuInS2 nanocrystals embedded polymer composite films of equal thickness by using a precise solution casting method. The impacts of polymer molecular weight on the dispersibility of CuInS2 nanocrystals were then systematically studied through evaluating the decrease in transmittance and red shift of emission wavelength. The composite films made from PMMA of small molecular weights exhibited higher transmittance. Applications of these green and red emissive composite films as color converters in remote-type light-emitting devices were further demonstrated. Full article
(This article belongs to the Special Issue Recent Developments in Luminescent Nanomaterials)
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14 pages, 2060 KiB  
Article
Europium (II)-Doped CaF2 Nanocrystals in Sol-Gel Derived Glass-Ceramic: Luminescence and EPR Spectroscopy Investigations
by Corina Secu, Arpad-Mihai Rostas and Mihail Secu
Nanomaterials 2022, 12(17), 3016; https://doi.org/10.3390/nano12173016 - 31 Aug 2022
Cited by 3 | Viewed by 1746
Abstract
The remarkable properties of Eu2+-activated phosphors, related to the broad and intense luminescence of Eu2+ ions, showed a high potential for a wide range of optical-related applications. Oxy-fluoride glass-ceramic containing Europium (II)-doped CaF2 nanocrystals embedded in silica matrix were [...] Read more.
The remarkable properties of Eu2+-activated phosphors, related to the broad and intense luminescence of Eu2+ ions, showed a high potential for a wide range of optical-related applications. Oxy-fluoride glass-ceramic containing Europium (II)-doped CaF2 nanocrystals embedded in silica matrix were produced in two steps: glass-ceramization in air at 800° with Eu3+-doped CaF2 nanocrystals embedded followed by Eu3+ to Eu2+ reduction during annealing in reducing atmosphere. The broad, blue luminescence band at 425 nm and with the long, weak tail in the visible range is assigned to the d → f type transition of the Eu2+ located inside the CaF2 nanocrystals in substitutional and perturbed sites, respectively; the photoluminescence quantum yield was about 0.76. The X-ray photoelectron spectroscopy and Electron paramagnetic spectroscopy confirmed the presence of Eu2+ inside the CaF2 nanocrystals. Thermoluminescence curves recorded after X-ray irradiation of un-doped and Eu2+-doped glass-ceramics showed a single dominant glow peak at 85 °C related to the recombination between F centers and Eu2+ related hole within the CaF2 nanocrystals. The applicability of the procedure can be tested to obtain an oxy-fluoride glass-ceramic doped with other divalent ions such as Sm2+, Yb2+, as nanophosphors for radiation detector or photonics-related applications. Full article
(This article belongs to the Special Issue Recent Developments in Luminescent Nanomaterials)
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13 pages, 3134 KiB  
Article
Efficient Near-Infrared-Activated Photocatalytic Hydrogen Evolution from Ammonia Borane with Core-Shell Upconversion-Semiconductor Hybrid Nanostructures
by Andrew J. Evangelista, Mariia Ivanchenko and Hao Jing
Nanomaterials 2021, 11(12), 3237; https://doi.org/10.3390/nano11123237 - 29 Nov 2021
Cited by 4 | Viewed by 3472
Abstract
In this work, the photocatalytic hydrogen evolution from ammonia borane under near-infrared laser irradiation at ambient temperature was demonstrated by using the novel core-shell upconversion-semiconductor hybrid nanostructures (NaGdF4:Yb3+/Er3+@NaGdF4@Cu2O). The particles were successfully synthesized [...] Read more.
In this work, the photocatalytic hydrogen evolution from ammonia borane under near-infrared laser irradiation at ambient temperature was demonstrated by using the novel core-shell upconversion-semiconductor hybrid nanostructures (NaGdF4:Yb3+/Er3+@NaGdF4@Cu2O). The particles were successfully synthesized in a final concentration of 10 mg/mL. The particles were characterized via high resolution transmission electron microscopy (HRTEM), photoluminescence, energy dispersive X-ray analysis (EDAX), and powder X-ray diffraction. The near-infrared-driven photocatalytic activities of such hybrid nanoparticles are remarkably higher than that with bare upconversion nanoparticles (UCNPs) under the same irradiation. The upconverted photoluminescence of UCNPs efficiently reabsorbed by Cu2O promotes the charge separation in the semiconducting shell, and facilitates the formation of photoinduced electrons and hydroxyl radicals generated via the reaction between H2O and holes. Both serve as reactive species on the dissociation of the weak B-N bond in an aqueous medium, to produce hydrogen under near-infrared excitation, resulting in enhanced photocatalytic activities. The photocatalyst of NaGdF4:Yb3+/Er3+@NaGdF4@Cu2O (UCNPs@Cu2O) suffered no loss of efficacy after several cycles. This work sheds light on the rational design of near-infrared-activated photocatalysts, and can be used as a proof-of-concept for on-board hydrogen generation from ammonia borane under near-infrared illumination, with the aim of green energy suppliers. Full article
(This article belongs to the Special Issue Recent Developments in Luminescent Nanomaterials)
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