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Nanomaterials
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Surface Functionalization on Nanostructured Materials for Multiple Application
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Surface Functionalization on Nanostructured Materials for Multiple Application

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

Deadline for manuscript submissions: closed (15 July 2022) | Viewed by 9976

Special Issue Editors

Dr. Anees Ahmad Ansari

E-Mail Website
Guest Editor
King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia
Interests: fabrication of nanostructured metal oxide based electrochemical biosensors; luminescent lanthanide nanomaterials for biomedical applications
Dr. Abdul K. Parchur

E-Mail Website
Guest Editor
Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
Interests: radiation therapy; nanoparticles; MR-linac; proton therapy; cancer therapy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Luminescent lanthanides nanomaterials have been applied widely in our daily life because of their leading role in material science and biomedical sciences. Efforts are ongoing to enhance luminescence efficiency by manipulating the structure of the nanostructured materials. Core-shell formation is an effective method to improve the solubility character of materials in aqueous solvents and enhance the quantum yield of luminescent materials. This Special Issue on “Surface Functionalization on Nanostructured Materials for Multiple Application” aims to assess the current applications of nanomaterials in drug delivery systems, biotechnology, optoelectronics, photonics, solid-state lasers, and biomedical-imaging-related fields. It represents an opportunity to promote mutual interaction, information dissemination, and exchange between researchers and hence to promote fruitful collaborations on advanced, state-of-the-art luminescence nanomaterials and recent developments, as well as nanomaterials to be used for electrochemical biosensing applications.

Dr. Anees Ahmad Ansari
Dr. Abdul K. Parchur
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

  • core-shell
  • luminescent lanthanide NPs
  • metal oxide
  • bioimaging
  • electrochemical biosensing
  • toxicity
  • NIR imaging

Published Papers (5 papers)

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Research

15 pages, 6688 KiB  
Article
On the Critical Heat Flux Assessment of Micro- and Nanoscale Roughened Surfaces
by Uzair Sajjad, Imtiyaz Hussain, Waseem Raza, Muhammad Sultan, Ibrahim M. Alarifi and Chi-Chuan Wang
Nanomaterials 2022, 12(18), 3256; https://doi.org/10.3390/nano12183256 - 19 Sep 2022
Cited by 14 | Viewed by 1742
Abstract
The boiling crisis or critical heat flux (CHF) is a very critical constraint for any heat-flux-controlled boiling system. The existing methods (physical models and empirical correlations) offer a specific interpretation of the boiling phenomenon, as many of these correlations are considerably influenced by [...] Read more.
The boiling crisis or critical heat flux (CHF) is a very critical constraint for any heat-flux-controlled boiling system. The existing methods (physical models and empirical correlations) offer a specific interpretation of the boiling phenomenon, as many of these correlations are considerably influenced by operational variables and surface morphologies. A generalized correlation is virtually unavailable. In this study, more physical mechanisms are incorporated to assess CHF of surfaces with micro- and nano-scale roughness subject to a wide range of operating conditions and working fluids. The CHF data is also correlated by using the Pearson, Kendal, and Spearman correlations to evaluate the association of various surface morphological features and thermophysical properties of the working fluid. Feature engineering is performed to better correlate the inputs with the desired output parameter. The random forest optimization (RF) is used to provide the optimal hyper-parameters to the proposed interpretable correlation and experimental data. Unlike the existing methods, the proposed method is able to incorporate more physical mechanisms and relevant parametric influences, thereby offering a more generalized and accurate prediction of CHF (R2 = 0.971, mean squared error = 0.0541, and mean absolute error = 0.185). Full article
(This article belongs to the Special Issue Surface Functionalization on Nanostructured Materials for Multiple Application)
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20 pages, 6486 KiB  
Article
Multifunctional Zn-Doped ITO Sol–Gel Films Deposited on Different Substrates: Application as CO2-Sensing Material
by Mariuca Gartner, Mihai Anastasescu, Jose Maria Calderon-Moreno, Madalina Nicolescu, Hermine Stroescu, Cristian Hornoiu, Silviu Preda, Luminita Predoana, Daiana Mitrea, Maria Covei, Valentin-Adrian Maraloiu, Valentin Serban Teodorescu, Carmen Moldovan, Peter Petrik and Maria Zaharescu
Nanomaterials 2022, 12(18), 3244; https://doi.org/10.3390/nano12183244 - 19 Sep 2022
Cited by 6 | Viewed by 2159
Abstract
Undoped and Zn-doped ITO (ITO:Zn) multifunctional thin films were successfully synthesized using the sol–gel and dipping method on three different types of substrates (glass, SiO2/glass, and Si). The effect of Zn doping on the optoelectronic, microstructural, and gas-sensing properties of the [...] Read more.
Undoped and Zn-doped ITO (ITO:Zn) multifunctional thin films were successfully synthesized using the sol–gel and dipping method on three different types of substrates (glass, SiO2/glass, and Si). The effect of Zn doping on the optoelectronic, microstructural, and gas-sensing properties of the films was investigated using X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), spectroscopic ellipsometry (SE), Raman spectroscopy, Hall effect measurements (HE), and gas testing. The results showed that the optical constants, the transmission, and the carrier numbers were correlated with the substrate type and with the microstructure and the thickness of the films. The Raman study showed the formation of ITO films and the incorporation of Zn in the doped film (ITO:Zn), which was confirmed by EDX analysis. The potential use of the multifunctional sol–gel ITO and ITO:Zn thin films was proven for TCO applications or gas-sensing experiments toward CO2. The Nyquist plots and equivalent circuit for fitting the experimental data were provided. The best electrical response of the sensor in CO2 atmosphere was found at 150 °C, with activation energy of around 0.31 eV. Full article
(This article belongs to the Special Issue Surface Functionalization on Nanostructured Materials for Multiple Application)
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21 pages, 4487 KiB  
Article
Functionalization with Polyphenols of a Nano-Textured Ti Surface through a High–Amino Acid Medium: A Chemical–Physical and Biological Characterization
by Rafaella C. P. Scannavino, Giacomo Riccucci, Sara Ferraris, Gabriel L. C. Duarte, Paulo T. de Oliveira and Silvia Spriano
Nanomaterials 2022, 12(17), 2916; https://doi.org/10.3390/nano12172916 - 24 Aug 2022
Cited by 5 | Viewed by 1868
Abstract
The study aimed to identify an effective mechanism of adsorption of polyphenols on a nano-textured Ti surface and to evaluate the osteogenic differentiation on it. The source of polyphenols was a natural extract from red grape pomace. A chemical etching was used to [...] Read more.
The study aimed to identify an effective mechanism of adsorption of polyphenols on a nano-textured Ti surface and to evaluate the osteogenic differentiation on it. The source of polyphenols was a natural extract from red grape pomace. A chemical etching was used to form an oxide layer with a nanoscale texture on Ti; this layer is hydrophilic, but without hydroxyl groups with high acidic–basic chemical reactivity. The samples were characterized by electron and fluorescence microscopies, UV–Vis spectroscopy, contact angle measurements, zeta potential titration curves, and Folin–Ciocâlteu test. The presence of an adsorbed layer of polyphenols on the functionalized surface, maintaining redox ability, was confirmed by several tests. Consistent with the surface features, the adsorption was maximized by dissolving the extract in a high–amino acid medium, with respect to an inorganic solution, exploiting the high affinity of amino acids for polyphenols and for porous titanium surfaces. The osteogenic differentiation was assessed on an osteoblastic cell line by immunofluorescence, cell viability, expression of key osteoblast markers, and extracellular matrix mineralization. The surfaces functionalized with the extract diluted in the range 1 × 10−5–1 mg/mL resulted in having a greater osteogenic activity for the highest concentration, with lower values of cell viability; higher expression of alkaline phosphatase, bone sialoprotein, and collagen; and lower levels of osteopontin. In conclusion, the functionalization of a nano-textured Ti surface with polyphenols can potentially favor the osteogenic activity of osseointegrated implants. Full article
(This article belongs to the Special Issue Surface Functionalization on Nanostructured Materials for Multiple Application)
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11 pages, 3464 KiB  
Article
In Situ Formation of Copper Phosphate on Hydroxyapatite for Wastewater Treatment
by Fatemeh Rahmani, Arezoo Ghadi, Esmail Doustkhah and Samad Khaksar
Nanomaterials 2022, 12(15), 2650; https://doi.org/10.3390/nano12152650 - 2 Aug 2022
Cited by 3 | Viewed by 1733
Abstract
Here, we control the surface activity of hydroxyapatite (HAp) in wastewater treatment which undergoes peroxodisulfate (PDS) activation. Loading the catalytically active Cu species on HAp forms a copper phosphate in the outer layer of HAp. This modification turns a low active HAp into [...] Read more.
Here, we control the surface activity of hydroxyapatite (HAp) in wastewater treatment which undergoes peroxodisulfate (PDS) activation. Loading the catalytically active Cu species on HAp forms a copper phosphate in the outer layer of HAp. This modification turns a low active HAp into a high catalytically active catalyst in the dye degradation process. The optimal operational conditions were established to be [Cu–THAp]0 = 1 g/L, [RhB]0 = 20 mg/L, [PDS]0 = 7.5 mmol/L, and pH = 3. The experiments indicate that the simultaneous presence of Cu-THAp and PDS synergistically affect the degradation process. Additionally, chemical and structural characterizations proved the stability and effectiveness of Cu-THAp. Therefore, this work introduces a simple approach to water purification through green and sustainable HAp-based materials. Full article
(This article belongs to the Special Issue Surface Functionalization on Nanostructured Materials for Multiple Application)
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13 pages, 18987 KiB  
Article
Bio-Inspired Surface Modification of Magnetite Nanoparticles with Dopamine Conjugates
by Alexander Volov, Liubov Shkodenko, Elena Koshel and Andrey S. Drozdov
Nanomaterials 2022, 12(13), 2230; https://doi.org/10.3390/nano12132230 - 29 Jun 2022
Cited by 7 | Viewed by 1869
Abstract
Organically-coated nanomaterials are intensively studied and find numerous applications in a wide range of areas from optics to biomedicine. One of the recent trends in material science is the application of bio-mimetic polydopamine coatings that can be produced on a variety of substrates [...] Read more.
Organically-coated nanomaterials are intensively studied and find numerous applications in a wide range of areas from optics to biomedicine. One of the recent trends in material science is the application of bio-mimetic polydopamine coatings that can be produced on a variety of substrates in a cost-efficient way under mild conditions. Such coatings not only modify the biocompatibility of the material but also add functional amino groups to the surface that can be further modified by classic conjugation techniques. Here we show an alternative strategy for substrates modification using dopamine conjugates instead of native dopamine. Compared to the classic scheme, the proposed strategy allows separation of the “organic” and “colloidal” stages, and simplified identification and purification steps. Modification with pre-modified dopamine made it possible to achieve high loading capacities with active components up to 10.5% wt. A series of organo-inorganic hybrids were synthesized and their bioactivity was analyzed. Full article
(This article belongs to the Special Issue Surface Functionalization on Nanostructured Materials for Multiple Application)
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