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Nanomaterials
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Mesoporous Silica-Based Materials for Analytical Applications
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Mesoporous Silica-Based Materials for Analytical Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Inorganic Materials and Metal-Organic Frameworks".

Deadline for manuscript submissions: closed (20 January 2024) | Viewed by 4000

Special Issue Editors

Dr. Jiyang Liu

E-Mail Website
Guest Editor
School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
Interests: chemo-/bio-sensors; electrochemistry; electrochemiluminescence; bioanalysis; food analysis; environmental monitoring; noble metal nanomaterials; porous materials; carbon nanomaterials
Special Issues, Collections and Topics in MDPI journals
Dr. Fei Yan

E-Mail Website
Guest Editor
Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, China
Interests: porous materials; electrochemical/electrochemiluminescence sensors; anti-fouling determination; POCT; mass transport in nanochannels
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Mesoporous silica-based materials have attractive features, such as high specific surface areas, ease of functionalization with various organic compounds, and hosting/support properties (for adsorbed species, catalysts, macromolecules, nano-objects, or biomolecules). These features are expected to favor mass transport and/or charge transfer, and could also contribute to improved selectivity of the detection (selective recognition, permselective barrier) as well as long-term durability (mechanical stability of the porous framework), showing promising potential in analytical applications for food safety, environmental monitoring, and medical diagnosis.

This Special Issue titled “Mesoporous silica-based materials for analytical applications” will report the recent developments and advances in the preparation, functionalization, and analytical applications of mesoporous silica-based materials. We welcome the submission of original research, reviews, mini-reviews, and perspective articles on themes.

Dr. Jiyang Liu
Dr. Fei Yan
Guest Editors

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. 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

  • mesoporous silica
  • preparation
  • functionalization
  • food safety
  • environmental monitoring
  • medical diagnosis
  • sensor

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Published Papers (2 papers)

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Research

14 pages, 3479 KiB  
Article
Reagentless Electrochemical Detection of Tumor Biomarker Based on Stable Confinement of Electrochemical Probe in Bipolar Silica Nanochannel Film
by Xile Zhou, Qianqian Han, Jinming Zhou, Chaoxu Liu and Jiyang Liu
Nanomaterials 2023, 13(10), 1645; https://doi.org/10.3390/nano13101645 - 15 May 2023
Cited by 17 | Viewed by 1820
Abstract
The development of simple and probe-integrated aptamer sensors for the electrochemical detection of tumor biomarkers is of great significance for the diagnosis of tumors and evaluation of prognosis. In this work, a probe-integrated aptamer sensor is demonstrated based on the stable confinement of [...] Read more.
The development of simple and probe-integrated aptamer sensors for the electrochemical detection of tumor biomarkers is of great significance for the diagnosis of tumors and evaluation of prognosis. In this work, a probe-integrated aptamer sensor is demonstrated based on the stable confinement of an electrochemical probe in a bipolar nanochannel film, which can realize the reagentless electrochemical detection of the tumor biomarker carcinoembryonic antigen (CEA). To realize the stable immobilization of a large amount of the cationic electrochemical probe methylene blue (MB), a two-layer silica nanochannel array (SNF) with asymmetric charge was grown on the supporting electrode from bipolar SNF (bp-SNF). The inner SNF is negatively charged (n-SNF), and the outer-layer SNF is positively charged (p-SNF). The dual electrostatic interaction including the electrostatic adsorption from n-SNF and the electrostatic repulsion from p-SNF achieve the stable confinement of MB in bp-SNF. The recognitive interface is fabricated by the covalent immobilization of the CEA aptamer on the outer surface of bp-SNF, followed by the blocking of non-specific binding sites. Owing to the stable and abundant immobilized probes and highly specific aptamer interface, the developed aptamer sensor enables the sensitive detection of CEA in the range of 1 pg/mL to 1 μg/mL with a low limit of detection (LOD, 0.22 pg/mL, S/N = 3). Owing to the high selectivity and stability of the developed biosensor, reagentless electrochemical detection of CEA in serum was realized. Full article
(This article belongs to the Special Issue Mesoporous Silica-Based Materials for Analytical Applications)
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12 pages, 1002 KiB  
Article
The Process and Mechanism of Preparing Nanoporous Silicon: Helium Ion Implantation
by Jianguang Wang, Kelin Zhu, Xiaoling Wu, Guoan Cheng and Ruiting Zheng
Nanomaterials 2023, 13(8), 1324; https://doi.org/10.3390/nano13081324 - 10 Apr 2023
Cited by 2 | Viewed by 1688
Abstract
Ion implantation is an effective way to control performance in semiconductor technology. In this paper, the fabrication of 1~5 nm porous silicon by helium ion implantation was systemically studied, and the growth mechanism and regulation mechanism of helium bubbles in monocrystalline silicon at [...] Read more.
Ion implantation is an effective way to control performance in semiconductor technology. In this paper, the fabrication of 1~5 nm porous silicon by helium ion implantation was systemically studied, and the growth mechanism and regulation mechanism of helium bubbles in monocrystalline silicon at low temperatures were revealed. In this work, 100 keV He ions (1~7.5 × 1016 ions/cm2) were implanted into monocrystalline silicon at 115 °C~220 °C. There were three distinct stages in the growth of helium bubbles, showing different mechanisms of helium bubble formation. The minimum average diameter of a helium bubble is approximately 2.3 nm, and the maximum number density of the helium bubble is 4.2 × 1023 m−3 at 175 °C. The porous structure may not be obtained at injection temperatures below 115 °C or injection doses below 2.5 × 1016 ions/cm2. In the process, both the ion implantation temperature and ion implantation dose affect the growth of helium bubbles in monocrystalline silicon. Our findings suggest an effective approach to the fabrication of 1~5 nm nanoporous silicon, challenging the classic view of the relationship between process temperature or dose and pore size of porous silicon, and some new theories are summarized. Full article
(This article belongs to the Special Issue Mesoporous Silica-Based Materials for Analytical Applications)
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