Special Issue "Structural and Optical Properties of Nanostructured Metal Oxides "

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystalline Materials".

Deadline for manuscript submissions: 31 December 2019.

Special Issue Editor

Guest Editor
Prof. Pier Carlo Ricci

Dipartimento di Fisica, Università di Cagliari, 09042 Monserrato, Cagliari, Italy
Website | E-Mail
Interests: metal oxides; phosphors; hybrids of organic/inorganic materials; opteoelectronics

Special Issue Information

Dear Colleagues,

At present, metal oxides play a very important role in many areas of chemistry, physics, and materials science, with reliable applications in several fields, ranging from environmental science to medical technology, energy harvesting, water treatment, and optoelectronics. In fact, depending on the structure assumed, they exhibit a metallic, semiconductor or insulator character. In addition, nanostructured metal oxides present interesting chemical, physical, and electronic properties, which are different from the bulk structure. In this view, they represent a breakthrough in the field of nanotechnology.

In this Special Issue, we are promoting an interdisciplinary platform to discuss nanostructured metal oxides from modeling to synthesis, characterization, processing, and device integration. Authors are encouraged to share their recent research and results on all the aspects of this class of materials: The fundamental science, the synthesis, and the characterization of the physicochemical properties, as well going deeper into the fundamental aspects that determine their growth, the final structure, and optical behavior of these systems. On the other hand, directly applied results are also greatly welcomed: Catalysis and/or photocatalysis in optoelectronic as transparent conductive materials, or photonics and electronics applications are just few main topics that we would cover.

The aim of this issue is to provide a wide forum for discussion of the recent advances in the fields of research related to oxides that can acts as a reference for future studies. As a result, full papers, communications, and reviews are all welcome.

Prof. Pier Carlo Ricci
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 papers will be 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. Crystals is an international peer-reviewed open access monthly 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 1400 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

  • Metal oxides
  • Physicochemical and optical properties
  • Structural and electronic properties
  • Nanosized materials and confinement effects
  • Catalysis, transparent conducting oxide, optical and optoelectronic devices

Published Papers (2 papers)

View options order results:
result details:
Displaying articles 1-2
Export citation of selected articles as:

Research

Open AccessCommunication
Hydrothermal Synthesis of Layered Titanium Phosphate Ti2O2H(PO4)[(NH4)2PO4]2 and Its Potential Application in Cosmetics
Crystals 2019, 9(7), 332; https://doi.org/10.3390/cryst9070332
Received: 7 May 2019 / Revised: 21 June 2019 / Accepted: 25 June 2019 / Published: 28 June 2019
PDF Full-text (28760 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Titanium phosphates were recently revealed as promising cosmetic pigments; however, their photocatalytic activity and sun protective factor (SPF) levels have not been investigated in detail. In this study, we used hydrothermal conditions to prepare nanocrystalline anatase, brookite, and layered titanium phosphate using the [...] Read more.
Titanium phosphates were recently revealed as promising cosmetic pigments; however, their photocatalytic activity and sun protective factor (SPF) levels have not been investigated in detail. In this study, we used hydrothermal conditions to prepare nanocrystalline anatase, brookite, and layered titanium phosphate using the titanium lactate complex, NH4H2PO4, and urea as precursors. The samples were characterized by powder X-ray diffraction (XRD) in addition to Raman spectroscopy, transmission and scanning electron microscopy (TEM, SEM), energy-dispersive X-ray spectroscopy (EDX), and UV-Vis spectroscopy. Furthermore, the photocatalytic activity, sun protective factor, and moisture retention ability were determined for the samples. Brookite exhibited the highest SPF value and anatase the lowest, while Ti2O2H(PO4)[(NH4)2PO4]2 displayed highly promising UV protection and moisture retention properties and, therefore, represents a polyfunctional pigment that is particularly well suited for cosmetic applications. Full article
(This article belongs to the Special Issue Structural and Optical Properties of Nanostructured Metal Oxides )
Figures

Graphical abstract

Open AccessArticle
Growth of Ga2O3 Nanowires via Cu-As-Ga Ternary Phase Diagram
Crystals 2019, 9(3), 155; https://doi.org/10.3390/cryst9030155
Received: 13 February 2019 / Revised: 11 March 2019 / Accepted: 12 March 2019 / Published: 15 March 2019
PDF Full-text (4068 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Currently, it is challenging to develop new catalysts for semiconductor nanowires (NWs) growth in a complementary-metal-oxide-semiconductor (CMOS) compatible manner via a vapor-liquid-solid (VLS) mechanism. In this study, chemically synthesized Cu2O nano cubes are adopted as the catalyst for single crystalline β-Ga [...] Read more.
Currently, it is challenging to develop new catalysts for semiconductor nanowires (NWs) growth in a complementary-metal-oxide-semiconductor (CMOS) compatible manner via a vapor-liquid-solid (VLS) mechanism. In this study, chemically synthesized Cu2O nano cubes are adopted as the catalyst for single crystalline β-Ga2O3 NWs growth in chemical vapor deposition. The growth temperature is optimized to be 750 to 800 °C. The NW diameter is controlled by tuning the sizes of Cu2O cubes in the 20 to 100 nm range with a bandgap of ~4.85 eV as measured by ultraviolet-visible absorption spectroscopy. More importantly, the catalyst tip is found to be Cu5As2, which is distinguished from those Au-catalyzed Au-Ga alloys. After a comprehensive phase diagram investigation, the β-Ga2O3 NWs are proposed to be grown by the ternary phase of Cu-As-Ga diffusing Ga into the growth frontier of the NW, where Ga react with residual oxygen to form the NWs. Afterward, Ga diminishes after growth since Ga would be the smallest component in the ternary alloy. All these results show the importance of the catalyst choice for CMOS compatible NW growth and also the potency of the ternary phase catalyst growth mode in other semiconductor NWs synthesis. Full article
(This article belongs to the Special Issue Structural and Optical Properties of Nanostructured Metal Oxides )
Figures

Figure 1

Crystals EISSN 2073-4352 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top