Special Issue "Synthesis and Functionalization of Colloidal Nanoparticles"

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

Deadline for manuscript submissions: 20 February 2022.

Special Issue Editors

Dr. Elisabetta Fanizza
E-Mail Website
Guest Editor
Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy
Interests: inorganic nanoparticles synthesis; nanoparticle size and shape regulation; luminescent semiconductors; plasmonic nanoparticles; optical and morphological characterization; nanoheterostructures
Dr. Nicoletta Depalo
E-Mail Website
Guest Editor
National Research Council, Institute for Chemical-Physical Processes (CNR-IPCF), 70126 Bari, Italy
Interests: colloidal inorganic nanomaterials functionalization; lipid- and polymer-based nanosystems; drug delivery nanovectors; multifunctional targeted nanostructures; theranostics

Special Issue Information

Dear Colleagues,

Colloidal nanoparticles are transforming many research fields, from energy conversion to biomedicine. The size/shape- and composition-dependent physicochemical properties of inorganic materials and their large surface area, which regulates interaction at the interface, highlight the strong relationship between structure and property (hence function) at the nanoscale and push towards a selective design of the materials. In this regard, colloidal nanoparticles that are synthesized in solution can take advantage of the principles of colloidal chemistry for the development of synthetic strategies able to offer a high control of their morphology, composition, and surface chemistry. Since these artificial colloidal nanoparticles are dispersible in solution, they can be manipulated like molecules, and molecular reaction or interaction can be specifically exploited for the material’s surface functionalization. In this regard, this Special Issue aims at highlighting diverse aspects of materials at the nanoscale, spanning from the synthesis of different classes of colloidal nanoparticles to their surface engineering, towards properly designed nanostructures with tailored functional properties and, consequently, as active components that can be useful for applications in the field of energy conversion, catalysis, sensing, and biomedicine. We want to encourage scientists of diverse backgrounds (material science, inorganic chemistry, biochemistry, biology) to contribute cutting-edge research papers, communications, and review articles to this Special Issue of Nanomaterials.

Dr. Elisabetta Fanizza
Dr. Nicoletta Depalo
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 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. 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 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

  • colloidal nanoparticles
  • properties at the nanoscale
  • inorganic and organic nanostructures
  • nanoparticles engineering
  • multifunctional nanosystems

Published Papers (3 papers)

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Research

Communication
Stable Coloured Micrometric Films from Highly Concentrated Nano-Silver Sols: The Role of the Stabilizing Agents
Nanomaterials 2021, 11(4), 980; https://doi.org/10.3390/nano11040980 - 10 Apr 2021
Cited by 1 | Viewed by 653
Abstract
The synthesis of highly concentrated aqueous silver nanoparticles (NPs), exploiting different types of polymeric stabilizing agents, has been extensively investigated, especially for the stabilization of spherical yellow nanoparticles. In this context, here, a successful and easy wet chemical method was adopted to synthesize [...] Read more.
The synthesis of highly concentrated aqueous silver nanoparticles (NPs), exploiting different types of polymeric stabilizing agents, has been extensively investigated, especially for the stabilization of spherical yellow nanoparticles. In this context, here, a successful and easy wet chemical method was adopted to synthesize concentrated primary colored (yellow, red, blue and green) sols. The influence of polyvinylpyrrolidone (PVP) and polyvinyl alcohol (PVA) in affecting the final stability was finely investigating via UV/Vis spectroscopy, dynamic light scattering, TEM and colorimetric analysis. The next step consisted on the deposition of obtained sols onto a crown-treated polyethylene terephthalate (PET) support to obtain transparent colored micrometric homogeneous films. The fabricated PVP-based Ag films were revealed to be outstandingly UV-stable, contrarily to PVA-based films, probably due to the degradation of the polymer itself. Indeed, after UV aging tests, the PVA macromolecules could be broken and chemically modified (demonstrated by FT-IR analyses). This resulted in there being insufficient macromolecules to efficiently cover the surface of the nanoparticles, meaning that the nanoparticles tended to aggregate with each other, destabilizing the system itself. Hence, the obtained colored films described herein could represent a promising tool for different applications, from color shifting to optoelectronic devices. Full article
(This article belongs to the Special Issue Synthesis and Functionalization of Colloidal Nanoparticles)
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Article
Photosensitive Thin Films Based on Drop Cast and Langmuir-Blodgett Hydrophilic and Hydrophobic CdS Nanoparticles
Nanomaterials 2020, 10(12), 2437; https://doi.org/10.3390/nano10122437 - 05 Dec 2020
Cited by 2 | Viewed by 837
Abstract
Comparative photoelectrochemical studies of cadmium sulfide (CdS) nanoparticles with either hydrophilic or hydrophobic surface properties are presented. Oleylamine organic shells provided CdS nanoparticles with hydrophobic behavior, affecting the photoelectrochemical properties of such nanostructured semiconductor. Hydrophilic CdS nanoparticles were drop-cast on the electrode, whereas [...] Read more.
Comparative photoelectrochemical studies of cadmium sulfide (CdS) nanoparticles with either hydrophilic or hydrophobic surface properties are presented. Oleylamine organic shells provided CdS nanoparticles with hydrophobic behavior, affecting the photoelectrochemical properties of such nanostructured semiconductor. Hydrophilic CdS nanoparticles were drop-cast on the electrode, whereas the hydrophobic ones were transferred in a controlled manner with Langmuir-Blodgett technique. The substantial hindrance of photopotential and photocurrent was observed for L-B CdS films as compared to the hydrophilic, uncoated nanoparticles that were drop-cast directly on the electrode surface. The electron lifetime in both hydrophilic and hydrophobic nanocrystalline CdS was determined, revealing longer carrier lifetime for oleylamine coated CdS nanoparticles, ascribed to the trapping of charge at the interface of the organic shell/CdS nanoparticle and to the dominant influence of the resistance of the organic shell against the flux of charges. The “on” transients of the photocurrent responses, observed only for the oleylamine-coated nanoparticles, were resolved, yielding the potential-dependent rate constants of the redox processes occurring at the interface. Full article
(This article belongs to the Special Issue Synthesis and Functionalization of Colloidal Nanoparticles)
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Article
Synthetic Tuning of CoII-Doped Silica Nanoarchitecture Towards Electrochemical Sensing Ability
Nanomaterials 2020, 10(7), 1338; https://doi.org/10.3390/nano10071338 - 09 Jul 2020
Cited by 4 | Viewed by 1029
Abstract
The present work introduces both synthesis of silica nanoparticles doped with CoII ions by means of differently modified microemulsion water-in-oil (w/o) and Stöber techniques and characterization of the hybrid nanoparticles (CoII@SiO2) by TEM, DLS, XRD, ICP-EOS, SAXS, UV-Vis, [...] Read more.
The present work introduces both synthesis of silica nanoparticles doped with CoII ions by means of differently modified microemulsion water-in-oil (w/o) and Stöber techniques and characterization of the hybrid nanoparticles (CoII@SiO2) by TEM, DLS, XRD, ICP-EOS, SAXS, UV-Vis, and UV-Vis/DR spectroscopy and electrochemical methods. The results reveal the lack of nanocrystalline dopants inside the hybrid nanoparticles, as well as no ligands, when CoII ions are added to the synthetic mixtures as CoII(bpy)3 complexes, thus pointing to coordination of CoII ions with Si-O- groups as main driving force of the doping. The UV-Vis/DR spectra of CoII@SiO2 in the range of d-d transitions indicate that Stöber synthesis in greater extent than the w/o one stabilizes tetrahedral CoII ions versus the octahedral ions. Both cobalt content and homogeneity of the CoII distribution within CoII@SiO2 are greatly influenced by the synthetic technique. The electrochemical behavior of CoII@SiO2 is manifested by one oxidation and two reduction steps, which provide the basis for electrochemical response on glyphosate and HP(O)(OEt)2 with the LOD = 0.1 μM and the linearity within 0.1–80 μM. The Stöber CoII@SiO2 are able to discriminate glyphosate from HP(O)(OEt)2, while the w/o nanoparticles are more efficient but nonselective sensors on the toxicants. Full article
(This article belongs to the Special Issue Synthesis and Functionalization of Colloidal Nanoparticles)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Multifunctional non-epitaxial Nanostructures for diagnosis and therapy
Authors: Elisabetta Fanizza; Nicoletta Depalo
Affiliation: Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Italy; National Research Council, Institute for Chemical-Physical Processes SS Bari, Italy
Abstract: Well-designed combination of two or more inorganic nanoparticles (NPs) in a single hierarchically organized nanostructure allows the simultaneous exploitation of multiple properties, such as luminescence, photo-activity or magnetism, deriving from each component. Two main preparative approaches can been explored for the preparation of the multidomain nanomaterials: the epitaxial growth of a second domain onto seeds of pre-existing one and the non-epitaxial growth. While the epitaxial growth requires advances in solution-based synthesis and heterostructure properties are strongly affected by lattice mismatch at the two domains interface, the non-epitaxial growth generates the complex hybrid nanostructures by simply joining and assembling discrete groups of distinct pre-synthesized NPs, regardless of structural parameters of each single NP. Bridging molecules, interacting surface moieties/ligands, or glues via polymer sections can be used for this purpose. This review intends to give an overview of the main preparative strategies and properties of non-epitaxial nanostructures proposed for applications in biomedicine. Indeed, multicomponent nanostructures can be functionalized with specific biomolecules to achieve original bioconjugates with great potential in diagnosis and/or therapy of several diseases. The NPs properties will be extensively described, to better understand the effective advantage offered by each individual function when integrated in a single nanostructure. Representative examples of bifunctional (magnetic/plasmonic, or magnetic/fluorescent or plasmonic/fluorescent) non epitaxial nanostructures, investigated for diagnosis and therapy of specific diseases, will be presented and listed according to the strategy used to assemble the discrete groups of distinct NPs.

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