Special Issue "Nano-hybrids: Synthesis, Characterization and Applications"

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

Deadline for manuscript submissions: 31 October 2020.

Special Issue Editor

Dr. Marcin Wysokowski
E-Mail Website
Guest Editor
Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland & Institut für Elektronik- und Sensormaterialien, 09599 Freiberg, Germany
Interests: biomaterials; bioinspired materials; biomimetics; extreme biomimetics; biomineralization; chitin; solvothermal synthesis; nanostructured metal oxides
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Nanotechnology and nanomaterials are common words these days, and they have an astonishing impact on our daily lives. Rapid technological development and miniaturization require simultaneous advances in materials science in order to meet the growing performance demands. Nanohybrids have been attracting much attention for the creation of a new generation of high-performance materials due to their extraordinarily high synergetic and complementary behavior between two or more component materials on the nanolevel. This Special Issue is focused on the synthesis, characterization, and application of nanohybrid materials, including nanoparticles and ultrathin films. Consequently, this Special Issue will collect original reviews and novel research papers that cover the current state-of-the-art as well as recent advances in the field materials composed of organic and/or inorganic materials at the nanolevel.

Dr. Marcin Wysokowski
Guest Editor

Manuscript Submission Information

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Keywords

  • Biohybrids
  • Hybrid biomaterials
  • Nanocomposites
  • Bio-nanocomposites
  • Nanofibers
  • Nanoparticles
  • Thin films
  • Nanocoatings
  • Colloids
  • Metal oxides
  • Metallic nanoparticles
  • Carbon-based materials
  • Graphene
  • Catalysts
  • Fuel cells
  • Energy storage
  • Chemo/Biosensors
  • Drug delivery systems
  • Nanomedicine
  • Biolabeling
  • Toxicity

Published Papers (4 papers)

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Research

Open AccessArticle
Surface-Dependent Osteoblasts Response to TiO2 Nanotubes of Different Crystallinity
Nanomaterials 2020, 10(2), 320; https://doi.org/10.3390/nano10020320 - 13 Feb 2020
Abstract
One of the major challenges of implantology is to design nanoscale modifications of titanium implant surfaces inducing osseointegration. The aim of this study was to investigate the behavior of rat osteoblasts cultured on anodized TiO2 nanotubes of different crystallinity (amorphous and anatase [...] Read more.
One of the major challenges of implantology is to design nanoscale modifications of titanium implant surfaces inducing osseointegration. The aim of this study was to investigate the behavior of rat osteoblasts cultured on anodized TiO2 nanotubes of different crystallinity (amorphous and anatase phase) up to 24 days. TiO2 nanotubes were fabricated on VT1–0 titanium foil via a two-step anodization at 20 V using NH4F as an electrolyte. Anatase-phase samples were prepared by heat treatment at 500 °C for 1 h. VT1–0 samples with flat surfaces were used as controls. Primary rat osteoblasts were seeded over experimental surfaces for several incubation times. Scanning electron microscopy (SEM) was used to analyze tested surfaces and cell morphology. Cell adhesion and proliferation were investigated by cell counting. Osteogenic differentiation of cells was evaluated by qPCR of runt-related transcription factor 2 (RUNX2), osteopontin (OPN), integrin binding sialoprotein (IBSP), alkaline phosphatase (ALP) and osteocalcin (OCN). Cell adhesion and proliferation, cell morphology and the expression of osteogenic markers were affected by TiO2 nanotube layered substrates of amorphous and anatase crystallinity. In comparison with flat titanium, along with increased cell adhesion and cell growth a large portion of osteoblasts grown on the both nanostructured surfaces exhibited an osteocyte-like morphology as early as 48 h of culture. Moreover, the expression of all tested osteogenic markers in cells cultured on amorphous and anatase TiO2 nanotubes was upregulated at least at one of the analyzed time points. To summarize, we demonstrated that amorphous and anodized TiO2 layered substrates are highly biocompatible with rat osteoblasts and that the surface modification with about 1500 nm length nanotubes of 35 ± 4 (amorphous phase) and 41 ± 8 nm (anatase phase) in diameter is sufficient to induce their osteogenic differentiation. Such results are significant to the engineering of coating strategies for orthopedic implants aimed to establish a more efficient bone to implant contact and enhance bone repair. Full article
(This article belongs to the Special Issue Nano-hybrids: Synthesis, Characterization and Applications)
Open AccessArticle
Dual-Functionalized Pesticide Nanocapsule Delivery System with Improved Spreading Behavior and Enhanced Bioactivity
Nanomaterials 2020, 10(2), 220; https://doi.org/10.3390/nano10020220 - 27 Jan 2020
Abstract
The prevention and control of pests and diseases are becoming increasingly difficult owing to extensive pesticide resistance. The synergistic use of pesticides for disease control is an effective way of slowing pesticide resistance, reducing the number of pesticide applications, and protecting the environment. [...] Read more.
The prevention and control of pests and diseases are becoming increasingly difficult owing to extensive pesticide resistance. The synergistic use of pesticides for disease control is an effective way of slowing pesticide resistance, reducing the number of pesticide applications, and protecting the environment. In this study, a dual-functionalized pesticide nanocapsule delivery system loaded with two active ingredients (AIs)—validamycin and thifluzamide—was developed to prevent and control rice sheath blight; the nanocapsule system was based on a water–oil–water double emulsion method combined with high-pressure homogenization technology. Our results showed that the dual-functionalized pesticide nanocapsules were monodisperse spheres with a mean particle size of ~260 nm and had good storage stability. Compared with commercial formulations, the dual-functionalized pesticide nanocapsules exhibited good foliar spread owing to their small size, which is beneficial for reducing the loss of pesticides on the leaves. The 50% median effect concentration and synergistic ratio against Rhizoctonia solani of the dual-functionalized pesticide nanocapsules and commercial formulation were 0.0082 and 0.0350 μg/mL, and 2.088 and 0.917, respectively. These findings indicate that the bioactivity of the dual-functionalized system was significantly better than that of the commercial formulations and that the dual-functionalized system demonstrated a clear synergistic effect between the two AIs. The system presented here is simple, fast, and capable of dual-pesticide loading with significant synergistic effects. Our findings could help to facilitate the improvement of pesticides efficiency and the slowing of pesticide resistance. Full article
(This article belongs to the Special Issue Nano-hybrids: Synthesis, Characterization and Applications)
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Open AccessArticle
Sensitive Voltammetric Sensor for Tryptophan Detection by Using Polyvinylpyrrolidone Functionalized Graphene/GCE
Nanomaterials 2020, 10(1), 125; https://doi.org/10.3390/nano10010125 - 09 Jan 2020
Abstract
In this paper, an electrochemical method for the measurement of tryptophan (Trp) was developed based on a glassy carbon electrode modified with polyvinylpyrrolidonefunctionalized graphene (PVP-GR)/glassy carbon electrode (GCE). In 0.1 M phosphate buffer solution (PBS, pH = 2.2), compared with bare GCE, PVP/GCE, [...] Read more.
In this paper, an electrochemical method for the measurement of tryptophan (Trp) was developed based on a glassy carbon electrode modified with polyvinylpyrrolidonefunctionalized graphene (PVP-GR)/glassy carbon electrode (GCE). In 0.1 M phosphate buffer solution (PBS, pH = 2.2), compared with bare GCE, PVP/GCE, and GR/GCE, the oxidation peak current of Trp increased dramatically at PVP-GR/GCE. The oxidation mechanism of Trp on the PVP-GR/GCE was discussed and the experimental conditions were optimized. Under the best experimental conditions, the oxidation peak current of Trp was proportional to its concentration in the range of 0.06 µM–10.0 µM and 10.0–100.0 µM, and the limit of detection (LOD) was 0.01 µM (S/N = 3). The target modified electrode with excellent repeatability, stability and selectivity, was successfully applied to detectTrp in drugs and biological samples. Full article
(This article belongs to the Special Issue Nano-hybrids: Synthesis, Characterization and Applications)
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Open AccessArticle
Silica-Coated Magnetic Iron Oxide Nanoparticles Grafted onto Graphene Oxide for Protein Isolation
Nanomaterials 2020, 10(1), 117; https://doi.org/10.3390/nano10010117 - 08 Jan 2020
Abstract
In this study, silica-coated magnetic iron oxide nanoparticles ([email protected]2) were covalently conjugated onto graphene oxide (GO/[email protected]2) for protein isolation. First, MNPs were precisely coated with a silica layer on the surface by using the reverse microemulsion method, followed by [...] Read more.
In this study, silica-coated magnetic iron oxide nanoparticles ([email protected]2) were covalently conjugated onto graphene oxide (GO/[email protected]2) for protein isolation. First, MNPs were precisely coated with a silica layer on the surface by using the reverse microemulsion method, followed by incubation with 3-glycidyloxypropyltrimethoxysilane (GPTS) to produce the GPTS-functionalized [email protected]2 (GPTS-coated [email protected]2) that display epoxy groups on the surface. The silica shell on the MNPs was optimized at 300 µL of Igepal®CO-520, 5 mg of MNP, 100 µL of TEOS, 100 µL of NH4OH and 3% of 3-glycidyloxypropyltrimethoxysilane (GPTS). Simultaneously, polyethyleneimine (PEI) was covalently conjugated to GO to enhance the stability of GO in aqueous solutions and create the reaction sites with epoxy groups on the surface of GPTS-coated [email protected]2. The ratio of PEI grafted GO and GPTS-coated [email protected]2 (GO/MNP ratio) was investigated to produce GO/[email protected]2 with highly saturated magnetization without aggregation. As a result, the GO/MNP ratio of 5 was the best condition to produce the GO/[email protected]2 with 9.53 emu/g of saturation superparamagnetization at a magnetic field of 2.0 (T). Finally, the GO/[email protected]2 were used to separate bovine serum albumin (BSA) to investigate its protein isolation ability. The quantity of BSA adsorbed onto 1 mg of GO/[email protected]2 increased sharply over time to reach 628 ± 9.3 µg/mg after 15 min, which was 3.5-fold-higher than that of GPTS-coated [email protected]2. This result suggests that the GO/[email protected]2 nanostructure can be used for protein isolation. Full article
(This article belongs to the Special Issue Nano-hybrids: Synthesis, Characterization and Applications)
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