Magnetic, Optical, and Electrical Transport Properties of Novel Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 2757

Special Issue Editors


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Guest Editor
Department of Chemical Engineering, Faculty of Engineering, Ariel University, Ariel 4076414, Israel
Interests: nanotubes; van der Waals materials; 2D materials
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Chemical Engineering, Faculty of Engineering, Ariel University, Ariel 4076414, Israel
Interests: perovskites; alumina membrane; H2 production; Raman spectroscopy; UV photodetector

Special Issue Information

Dear Colleagues,

Nanomaterials have a broad area of development owing to their novel and significantly unique physical and chemical properties in comparison to their bulk counterparts. The importance of nanomaterials in various applications and their different properties are reported elsewhere following tremendous scientific developments. The large surface area and confinement (quantum) effects of nanomaterials lead to greater chemical reactivity that determines the properties and characteristics of materials at the nanometer scale, which results in new optical, electrical, and magnetic behaviors. The precise control over the optical, magnetic, chemical, biological, electrical, and other properties at the nanoscale has led to significant research activity on nanostructures in novel nanomaterials research. Hence, intelligent design and synthesis of new nanomaterials with controlled size, morphology, dimensionality, and novel properties are yielding innovative applications. The use of materials chemistry, especially the chemical principles to control the synthesis of novel nanomaterials, is a key aspect to modify the properties of nanomaterials and thus create new technological applications. Additionally, the understanding of magnetic, optical, and electrical transport properties of novel nanomaterials is a comprehensive study on cutting-edge progress in the synthesis and characterization of nanomaterials. Hence, the study of these properties of novel nanomaterial is crucial to tailor the development of optoelectronic devices and other subsequent advances in many different applications. The impact of novel nanomaterials with desirable magnetic and optoelectronic properties on commercial applications is inevitable and hence has a significant role in the development of scientific and engineering technologies at the nanoscale.

Covering novel nanomaterials and their key points of interest, this Special Issue aims to collect studies on the development of novel nanomaterials, and this issue will cover the magnetic, optical, and electrical transport properties of novel nanomaterials and their frontier applications in different fields. This Special Issue will be vital to academic researchers and engineers working with novel nanomaterials.

We welcome the submission of full research papers, communications, as well as review articles in the Special Issue “Magnetic, Optical, and Electrical Transport Properties of Novel Nanomaterials”. Potential topics include but are not limited to:

  • New/developed synthesis methodologies for the preparation of novel nanomaterials;
  • Structural, optical, magnetic, and electronic properties of nanomaterials;
  • Nanomaterials in optoelectronic device applications (photodetectors, sensors, solar cells, etc.);
  • Nanomaterials in energy storage and other commercial applications.

We look forward to your submissions.

Dr. Lena Yadgarov
Dr. Neena Prasad
Guest Editors

Manuscript Submission Information

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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

  • novel nanomaterials
  • optical properties
  • magnetic properties
  • optoelectronic applications
  • electrical transport

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Published Papers (2 papers)

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Research

15 pages, 892 KiB  
Article
Incidence of the Brownian Relaxation Process on the Magnetic Properties of Ferrofluids
by Lili Vajtai, Norbert Marcel Nemes, Maria del Puerto Morales, Kolos Molnár, Balázs Gábor Pinke and Ferenc Simon
Nanomaterials 2024, 14(7), 634; https://doi.org/10.3390/nano14070634 - 5 Apr 2024
Viewed by 975
Abstract
Ferrofluids containing magnetic nanoparticles represent a special class of magnetic materials due to the added freedom of particle tumbling in the fluids. We studied this process, known as Brownian relaxation, and its effect on the magnetic properties of ferrofluids with controlled magnetite nanoparticle [...] Read more.
Ferrofluids containing magnetic nanoparticles represent a special class of magnetic materials due to the added freedom of particle tumbling in the fluids. We studied this process, known as Brownian relaxation, and its effect on the magnetic properties of ferrofluids with controlled magnetite nanoparticle sizes. For small nanoparticles (below 10 nm diameter), the Néel process is expected to dominate the magnetic response, whereas for larger particles, Brownian relaxation becomes important. Temperature- and magnetic-field-dependent magnetization studies, differential scanning calorimetry, and AC susceptibility measurements were carried out for 6 and 13.5 nm diameter magnetite nanoparticles suspended in water. We identify clear fingerprints of Brownian relaxation for the sample of large-diameter nanoparticles as both magnetic and thermal hysteresis develop at the water freezing temperature, whereas the samples of small-diameter nanoparticles remain hysteresis-free down to the magnetic blocking temperature. This is supported by the temperature-dependent AC susceptibility measurements: above 273 K, the data show a low-frequency Debye peak, which is characteristic of Brownian relaxation. This peak vanishes below 273 K. Full article
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13 pages, 3189 KiB  
Article
Plasmon-Enhanced Perovskite Solar Cells Based on Inkjet-Printed Au Nanoparticles Embedded into TiO2 Microdot Arrays
by Sofia Rubtsov, Albina Musin, Viktor Danchuk, Mykola Shatalov, Neena Prasad, Michael Zinigrad and Lena Yadgarov
Nanomaterials 2023, 13(19), 2675; https://doi.org/10.3390/nano13192675 - 29 Sep 2023
Cited by 1 | Viewed by 1411
Abstract
The exceptional property of plasmonic materials to localize light into sub-wavelength regimes has significant importance in various applications, especially in photovoltaics. In this study, we report the localized surface plasmon-enhanced perovskite solar cell (PSC) performance of plasmonic gold nanoparticles (AuNPs) embedded into a [...] Read more.
The exceptional property of plasmonic materials to localize light into sub-wavelength regimes has significant importance in various applications, especially in photovoltaics. In this study, we report the localized surface plasmon-enhanced perovskite solar cell (PSC) performance of plasmonic gold nanoparticles (AuNPs) embedded into a titanium oxide (TiO2) microdot array (MDA), which was deposited using the inkjet printing technique. The X-ray (XRD) analysis of MAPI (methyl ammonium lead iodide) perovskite films deposited on glass substrates with and without MDA revealed no destructive effect of MDA on the perovskite structure. Moreover, a 12% increase in the crystallite size of perovskite with MDA was registered. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM) techniques revealed the morphology of the TiO2_MDA and TiO2-AuNPs_MDA. The finite-difference time-domain (FDTD) simulation was employed to evaluate the absorption cross-sections and local field enhancement of AuNPs in the TiO2 and TiO2/MAPI surrounding media. Reflectance UV-Vis spectra of the samples comprising glass/TiO2 ETL/TiO2_MDA (ETL—an electron transport layer) with and without AuNPs in TiO2_MDA were studied, and the band gap (Eg) values of MAPI have been calculated using the Kubelka–Munk equation. The MDA introduction did not influence the band gap value, which remained at ~1.6 eV for all the samples. The photovoltaic performance of the fabricated PSC with and without MDA and the corresponding key parameters of the solar cells have also been studied and discussed in detail. The findings indicated a significant power conversion efficiency improvement of over 47% in the PSCs with the introduction of the TiO2-AuNPs_MDA on the ETL/MAPI interface compared to the reference device. Our study demonstrates the significant enhancement achieved in halide PSC by utilizing AuNPs within a TiO2_MDA. This approach holds great promise for advancing the efficiency and performance of photovoltaic devices. Full article
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