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Nanostructured Porous Silicon: Fundamentals and Applications
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Nanostructured Porous Silicon: Fundamentals and Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Porous Materials".

Deadline for manuscript submissions: closed (20 October 2023) | Viewed by 2903

Special Issue Editor

Dr. Vincent K.S. Hsiao

E-Mail Website
Guest Editor
Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, Puli Township, Nantou 54561, Taiwan
Interests: photoelectrics; thermoelectrics and photothermoelectrics; photoelectrochemistry; laser-assisted fabrication of nanomaterials; laser spectroscopy; triboelectric nanogenerator (TENG)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In 1990, Canham observed the visible photoluminescence phenomenon of nanostructured porous silicon (PSi) at room temperature, the research work was published in the Science journal, and this material gradually derived many applications in optoelectronic devices, such as metal-semiconductor-metal (MSM) photodetectors. Later, by adjusting the parameters of the relevant electrochemical process, including electrolyte composition and manufacturing current density, a variety of nanostructured PSi with different surface morphologies have been proven efficient to increase the functionality in photoanode for water splitting applications. Also nanostructured PSi of a one-dimensional periodic structure could also be used in biosensor devices.

This special issue mainly hopes that researchers can contribute their research work on nanostructured PSi, including fundamental problems and related applications. Since various electrochemical etching processes, such as metal-assisted etching, are used to adjust experimental parameters to obtain nanostructured PSi with various structures. It will be helpful to collect different ways to fabricate nanostructured PSi in one special issue. Also surface-modified PSi with different functionality used in optical measurement systems, such as Raman and biosensor, is another interesting topic here. The research areas of nanostructured PSi with improved photoelectronics, thermoelectrics, and photoelectrochemistry are highly appreciated for contributing to this special issue. Related research on silicon nanostructures, such as silicon nanowires, is also very welcome.

Dr. Vincent K.S. Hsiao
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. Materials 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 2600 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

  • porous silicon
  • silicon nanowire
  • nanomaterials
  • optoelectronic device, biosensor
  • photoelectrochemistry
  • Raman, thermoelectrics
  • photodetector
  • photoanode

Published Papers (2 papers)

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Research

17 pages, 7725 KiB  
Article
Self-Organization Effects of Thin ZnO Layers on the Surface of Porous Silicon by Formation of Energetically Stable Nanostructures
by Danatbek Murzalinov, Ainagul Kemelbekova, Tatyana Seredavina, Yulia Spivak, Abay Serikkanov, Aigul Shongalova, Sultan Zhantuarov, Vyacheslav Moshnikov and Daniya Mukhamedshina
Materials 2023, 16(2), 838; https://doi.org/10.3390/ma16020838 - 15 Jan 2023
Cited by 3 | Viewed by 1508
Abstract
The formation of complex surface morphology of a multilayer structure, the processes of which are based on quantum phenomena, is a promising domain of the research. A hierarchy of pore of various sizes was determined in the initial sample of porous silicon by [...] Read more.
The formation of complex surface morphology of a multilayer structure, the processes of which are based on quantum phenomena, is a promising domain of the research. A hierarchy of pore of various sizes was determined in the initial sample of porous silicon by the atomic force microscopy. After film deposition by spray pyrolysis, ZnO nanoclusters regularly distributed over the sample surface were formed. Using the electron paramagnetic resonance (EPR) method it was determined that the localization of paramagnetic centers occurs more efficiently as a result of the ZnO deposition. An increase in the number of deposited layers, leads to a decrease in the paramagnetic center relaxation time, which is probably connected with the formation of ZnO nanocrystals with energetically stable properties. The nucleation and formation of nanocrystals is associated with the interaction of particles with an uncompensated charge. There is no single approach to determine the mechanism of this process. By the EPR method supplemented with the signal cyclic saturation, spectral manifestations from individual centers were effectively separated. Based on electron paramagnetic resonance and photoluminescence studies it was revealed that the main transitions between energy levels are due to oxygen vacancies and excitons. Full article
(This article belongs to the Special Issue Nanostructured Porous Silicon: Fundamentals and Applications)
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10 pages, 2065 KiB  
Article
Architecture of Nanoantioxidant Based on Mesoporous Organosilica Trp-Met-PMO with Dipeptide Skeleton
by Wanli Zhou, Haohua Ma, Yunqiao Dai, Yijing Du, Cheng Guo and Jianqiang Wang
Materials 2023, 16(2), 638; https://doi.org/10.3390/ma16020638 - 09 Jan 2023
Cited by 1 | Viewed by 1003
Abstract
A nanoantioxidant of mesoporous organosilica (Trp-Met-PMO) based on the framework of tryptophan–methionine dipeptide was first designed and constructed by condensation between self-created dipeptide organosilica precursor (Trp-Met-Si) and tetraethyl orthosilicate (TEOS) in alkaline conditions under the template hexadecyl trimethyl ammonium bromide (CTAB). Trp-Met-Si was [...] Read more.
A nanoantioxidant of mesoporous organosilica (Trp-Met-PMO) based on the framework of tryptophan–methionine dipeptide was first designed and constructed by condensation between self-created dipeptide organosilica precursor (Trp-Met-Si) and tetraethyl orthosilicate (TEOS) in alkaline conditions under the template hexadecyl trimethyl ammonium bromide (CTAB). Trp-Met-Si was prepared by the reaction between dipeptide Trp-Met and conventional organosilicon coupling agent isocyanatopropyltriethoxysilane (IPTES) via a multiple-step reaction method. The material Trp-Met-PMO was confirmed by XRD, FT-IR and N2 adsorption–desorption analysis. The material Trp-Met-5-PMO with low amounts of organosilica precursor remained a mesoporous material with well-ordered 2D hexagonal (P6mm) structure. With increasing amounts of organosilica precursor, a mesoporous structure was still formed, as shown in the material Trp-Met-100-PMO with the highest amounts of organosilica precursor. Moreover, pore size distribution, surface area and porosity of Trp-Met-PMO are regulated with different amounts of organosilica precursor Trp-Met-Si. The antioxidant activity of Trp-Met-PMO was evaluated by ABTS free radical-scavenging assay. The results showed that antioxidant activity was largely enhanced with increasing contents of organosilica precusor Trp-Met-Si in the skeleton. The material Trp-Met-40-PMO exhibited maximum scavenging capacity of ABTS free radicals, the inhibition percent was 5.88%. This study provides a design strategy for nanoantioxidant by immobilizing short peptides within the porous framework of mesoporous material. Full article
(This article belongs to the Special Issue Nanostructured Porous Silicon: Fundamentals and Applications)
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