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Applied Sciences
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Synthesis and Characterization of Nanomaterials: Latest Advances and Prospects
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Synthesis and Characterization of Nanomaterials: Latest Advances and Prospects

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: closed (30 March 2022) | Viewed by 5640

Special Issue Editor

Prof. Dr. Jaime Santoyo-Salazar

E-Mail Website
Guest Editor
Physics Department, Center for Research and Advanced Studies of the National Polytechnic Institute, CINVESTAV-IPN, Ciudad de México 07360, Mexico
Interests: solid state physics; synthesis of nanoparticles; theranostics; electron microscopy; scanning probe microscopy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue of Applied Sciences aims to cover the synthesis of nanomaterials by physical, chemical, and biological routes, as well as promote the emerging interdisciplinary advances to control nanomaterials processing, functionalization, and coating, including their formation mechanisms.

The characterization of nanomaterials properties involves the correlations between atomic structure, composition, dimension, size, morphology, shape, surface, coating, stability, and self-assembly, among others, with their physical, chemical, and biological responses as function of time and environment.

This issue ponders the latest advances and prospects in the synthesis and modification of nanomaterials through improved properties. These features open unlimited possibilities for potential applications in different areas.

This invitation is open to submit high-quality contributions for this Special Issue. Reviews and original research articles are welcome. Potential topics include but are not limited to:

  1. Synthesis and characterization of nanomaterials from low dimension to 3D.
  2. Latest advances in microfluidics, microwave, ultrasound, thermal decomposition, laser ablation, ecofriendly synthesis, etc.
  3. Organic and inorganic functional nanomaterials: core-shell, thin films, coatings, decorated surfaces, and biomimetics.
  4. Novel and easy forms of synthesis of nanomaterials.
  5. Semiconductor nanomaterials as nano-optics, nano-optoelectronics, and nano-photonics: photovoltaics devices, LEDs, optical sensors, biomarkers, electronic devices and photocatalysis.
  6. Smart nanomaterials.
  7. Photothermal and photodynamic nanomaterials.
  8. Magnetic nanomaterials: technological applications, drug release, hyperthermia, diagnosis and theranostics.
  9. Bio-nanomaterials: medical technology, regenerative medicine, biosensors, biomarkers, antimicrobial surfaces, etc.
  10. Properties, regulation and nanotoxicity.

Prof. Dr. Jaime Santoyo-Salazar
Guest Editor

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. Applied Sciences 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 2400 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

  • synthesis and characterization
  • biomimetics nanoparticles
  • semiconductor nanomaterials
  • smart nanomaterials
  • bio-nanomaterials
  • magnetic nanomaterials
  • nanotoxicity

Published Papers (3 papers)

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Research

20 pages, 6576 KiB  
Article
Preparation of Powders Containing Sb, Ni, and O for the Design of a Novel CO and C3H8 Sensor
by Jorge Alberto Ramírez-Ortega, José Trinidad Guillén-Bonilla, Alex Guillén-Bonilla, Verónica María Rodríguez-Betancourtt, Lorenzo Gildo-Ortiz, Oscar Blanco-Alonso, Víctor Manuel Soto-García, Maricela Jiménez-Rodríguez and Héctor Guillén-Bonilla
Appl. Sci. 2021, 11(20), 9536; https://0-doi-org.brum.beds.ac.uk/10.3390/app11209536 - 14 Oct 2021
Cited by 2 | Viewed by 1287
Abstract
In this work, powders of NiSb2O6 were synthesized using a simple and economical microwave-assisted wet chemistry method, and calcined at 700, 800, and 900 °C. It was identified through X-ray diffraction that the oxide is a nanomaterial with a trirutile-type [...] Read more.
In this work, powders of NiSb2O6 were synthesized using a simple and economical microwave-assisted wet chemistry method, and calcined at 700, 800, and 900 °C. It was identified through X-ray diffraction that the oxide is a nanomaterial with a trirutile-type structure and space group P42/mnm (136). UV–Vis spectroscopy measurements showed that the bandgap values were at ~3.10, ~3.14, and ~3.23 eV at 700, 800, and 900 °C, respectively. Using scanning electron microscopy (SEM), irregularly shaped polyhedral microstructures with a size of ~154.78 nm were observed on the entire material’s surface. The particle size was estimated to average ~92.30 nm at the calcination temperature of 900 °C. Sensing tests in static atmospheres containing 300 ppm of CO at 300 °C showed a maximum sensitivity of ~72.67. On the other hand, in dynamic atmospheres at different CO flows and at an operating temperature of 200 °C, changes with time in electrical resistance were recorded, showing a high response, stability, and repeatability, and good sensor efficiency during several operation cycles. The response times were ~2.77 and ~2.10 min to 150 and 200 cm3/min of CO, respectively. Dynamic tests in propane (C3H8) atmospheres revealed that the material improved its response in alternating current signals at two different frequencies (0.1 and 1 kHz). It was also observed that at 360 °C, the ability to detect propane flows increased considerably. As in the case of CO, NiSb2O6’s response in propane atmospheres showed very good thermal stability, efficiency, a high capacity to detect C3H8, and short response and recovery times at both frequencies. Considering the great performance in propane flows, a sensor prototype was developed that modulates the electrical signals at 360 °C, verifying the excellent functionality of NiSb2O6. Full article
(This article belongs to the Special Issue Synthesis and Characterization of Nanomaterials: Latest Advances and Prospects)
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15 pages, 2687 KiB  
Article
Electrical Response of the Spinel ZnAl2O4 and Its Application in the Detection of Propane Gas
by Héctor Guillén-Bonilla, José Trinidad Guillén-Bonilla, Verónica María Rodríguez-Betancourtt, Maricela Jiménez-Rodríguez, Alex Guillén-Bonilla, Emilio Huízar-Padilla, María Eugenia Sánchez-Morales, Jorge Alberto Ramírez-Ortega and Oscar Blanco-Alonso
Appl. Sci. 2021, 11(20), 9488; https://0-doi-org.brum.beds.ac.uk/10.3390/app11209488 - 13 Oct 2021
Cited by 3 | Viewed by 1745
Abstract
Nanoparticles of the semiconductor ZnAl2O4 were prepared using a microwave-assisted wet chemistry method in the presence of ethylenediamine and calcination at 250 °C. The material’s crystallinity and purity were verified by X-ray diffraction. The pure phase of the ZnAl2 [...] Read more.
Nanoparticles of the semiconductor ZnAl2O4 were prepared using a microwave-assisted wet chemistry method in the presence of ethylenediamine and calcination at 250 °C. The material’s crystallinity and purity were verified by X-ray diffraction. The pure phase of the ZnAl2O4 presented a cubic crystalline structure with cell parameters a = 8.087 Å and space group Fd-3m (227). Dynamic tests in propane atmospheres were carried out on pellets (~500 µm in diameter) manufactured with ZnAl2O4 powders. In the tests, the oxide showed variations with time in electrical resistance when injecting air-propane at an operating temperature of 250 °C. The pellets showed good stability, high sensitivity, and an optimal dynamic response as a function of time. On the other hand, a mathematical model was proposed to describe the chemical sensor’s dynamic behavior based on the electrical response and linear systems theory. The sensor’s transient response was obtained with the model by exposing the oxide to air and propane gas; its stability was checked, and the stabilization time was calculated. Subsequently, an operating point was selected, and, with it, a propane gas detector was designed. The sensor operated flawlessly at 250 °C at a concentration of 1000 ppm, with a response time of three seconds. The developed device is inexpensive and easy to implement. Full article
(This article belongs to the Special Issue Synthesis and Characterization of Nanomaterials: Latest Advances and Prospects)
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12 pages, 26167 KiB  
Article
Deposition and Characterization of Innovative Bulk Heterojunction Films Based on CuBi2O4 Nanoparticles and Poly(3,4 ethylene dioxythiophene):Poly(4-styrene sulfonate) Matrix
by María Elena Sánchez-Vergara, América R. Vázquez-Olmos, Leon Hamui, Alejandro Rubiales-Martínez, Ana L. Fernández-Osorio and María Esther Mata-Zamora
Appl. Sci. 2021, 11(19), 8904; https://0-doi-org.brum.beds.ac.uk/10.3390/app11198904 - 24 Sep 2021
Cited by 2 | Viewed by 1593
Abstract
This work presents the deposition and study of the semiconductor behavior of CuBi2O4 nanoparticles (NPs) with an average crystallite size of 24 ± 2 nm embedded in poly(3,4 ethylene dioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) films. The CuBi2O4 NP bandgap [...] Read more.
This work presents the deposition and study of the semiconductor behavior of CuBi2O4 nanoparticles (NPs) with an average crystallite size of 24 ± 2 nm embedded in poly(3,4 ethylene dioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) films. The CuBi2O4 NP bandgap was estimated at 1.7 eV, while for the composite film, it was estimated at 2.1 eV, due to PEDOT:PSS and the heterojunction between the polymer and the NPs. The charge transport of the glass/ITO/PEDOT:PSS-CuBi2O4 NP/Ag system was studied under light and dark conditions by means of current–voltage (I–V) characteristic curves. In natural-light conditions, the CuBi2O4 NPs presented electric behavior characterized by three different mechanisms: at low voltages, the behavior follows Ohm’s law; when the voltage increases, charge transport occurs by diffusion between the NP–polymer interfaces; and at higher voltages, it occurs due to the current being dominated by the saturation region. Due to their crystalline structure, their low bandgap in films and the feasibility of integrating them as components in composite films with PEDOT:PSS, CuBi2O4 NPs can be used as parts in optoelectronic devices. Full article
(This article belongs to the Special Issue Synthesis and Characterization of Nanomaterials: Latest Advances and Prospects)
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