Multifunctional Applications of Semiconductor-Based Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (30 June 2021) | Viewed by 2394

Special Issue Editor


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Guest Editor
DEMaC & CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
Interests: surface functionalisation of construction materials and coatings to develop novel light-activated multifunctional materials; multifunctional applications of semiconductor-based nanomaterials (photocatalysis, photochromism, electrochromism, light-to-energy functionalisations)

Special Issue Information

Dear Colleagues,

Semiconductors and nanomaterials are key materials in technological progress in the 21st century. Semiconductors play a vital part in the development of technologies spanning (but not limited to) generation, storage, conversion, distribution, and policy. They are also essential materials for the rising digital age—in fact, in a way, their driving force. Nanostructured materials provide solutions to problems that cannot be dealt with using conventional technologies.

In this context, obtaining advanced nanostructured multifunctional semiconducting materials exhibiting several coexisting properties is one of the most exciting and innovative research topics of our times. This Special Issue of Nanomaterials, “Multifunctional Applications of Semiconductor-Based Nanomaterials”, is devoted to research works dealing with nanostructured semiconductor materials having multifunctional applications. A special view will be given to light-activated semiconductor nanomaterials for electronic, sensing, (photo-) and electrocatalytic applications. Those materials are indeed envisioned to be key elements for electronic systems, computing, serving communications, sensors, environmental remediation, green and clean energy generation, and preservation of cultural heritage.

It is thus our pleasure to invite you to contribute to this Special Issue with your research article, communication or review.

Dr. David Maria Tobaldi
Guest Editor

Manuscript Submission Information

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Keywords

  • Multifunctionality
  • Metal oxide semiconductors
  • Light-to-energy
  • Environmental remediation
  • Preserving cultural heritage
  • (Micro-)electronic materials
  • Photocatalysis
  • Nanostructured materials

Published Papers (1 paper)

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Research

13 pages, 2876 KiB  
Article
Elucidation of the Crystal Growth Characteristics of SnO2 Nanoaggregates Formed by Sequential Low-Temperature Sol-Gel Reaction and Freeze Drying
by Saeid Vafaei, Alexander Wolosz, Catlin Ethridge, Udo Schnupf, Nagisa Hattori, Takashi Sugiura and Kazuhiro Manseki
Nanomaterials 2021, 11(7), 1738; https://doi.org/10.3390/nano11071738 - 01 Jul 2021
Cited by 6 | Viewed by 2003
Abstract
SnO2 nanoparticles are regarded as attractive, functional materials because of their versatile applications. SnO2 nanoaggregates with single-nanometer-scale lumpy surfaces provide opportunities to enhance hetero-material interfacial areas, leading to the performance improvement of materials and devices. For the first time, we demonstrate [...] Read more.
SnO2 nanoparticles are regarded as attractive, functional materials because of their versatile applications. SnO2 nanoaggregates with single-nanometer-scale lumpy surfaces provide opportunities to enhance hetero-material interfacial areas, leading to the performance improvement of materials and devices. For the first time, we demonstrate that SnO2 nanoaggregates with oxygen vacancies can be produced by a simple, low-temperature sol-gel approach combined with freeze-drying. We characterize the initiation of the low-temperature crystal growth of the obtained SnO2 nanoaggregates using high-resolution transmission electron microscopy (HRTEM). The results indicate that Sn (II) hydroxide precursors are converted into submicrometer-scale nanoaggregates consisting of uniform SnO2 spherical nanocrystals (2~5 nm in size). As the sol-gel reaction time increases, further crystallization is observed through the neighboring particles in a confined part of the aggregates, while the specific surface areas of the SnO2 samples increase concomitantly. In addition, X-ray photoelectron spectroscopy (XPS) measurements suggest that Sn (II) ions exist in the SnO2 samples when the reactions are stopped after a short time or when a relatively high concentration of Sn (II) is involved in the corresponding sol-gel reactions. Understanding this low-temperature growth of 3D SnO2 will provide new avenues for developing and producing high-performance, photofunctional nanomaterials via a cost-effective and scalable method. Full article
(This article belongs to the Special Issue Multifunctional Applications of Semiconductor-Based Nanomaterials)
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