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Surface Modification of Nanostructured Materials
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Surface Modification of Nanostructured Materials

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 13379

Special Issue Editors

Dr. Xiao Tong

E-Mail Website
Guest Editor
Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973-5000, USA
Interests: surface science; nanoscience; scanning probe microscope; electronic/vibrational spectroscopy
Dr. Ioana Daniela Dulama

E-Mail
Guest Editor
Institute of Multidisciplinary Research for Science and Technology, Valahia University of Targoviste, 130004 Targoviste, Romania
Interests: high precision and sensibility techniques (SEM-EDS, ICP-MS, AAS) used for material characterization and monitoring environmental pollution (soil, water, air, vegetation) with heavy metals; short and long-term biomonitoring using different plants/fungi; fitoremediation capacity of plants/fungi
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your research work to our Special Issue on “Surface Modification of Nanostructured Materials”. Nanostructured materials, compared to their bulk counterparts, exhibit novel physical, chemical, and biological properties mainly due to quantum confinement effects and enhanced surface to volume ratios at the nanometer scale. Owing to the significant surface effects in nanostructured materials’ properties, surface modification can improve, tune, and realize desired characteristic properties/functionalities of nanostructured materials such as surface atomic/electronic structure, morphology, chemical composition/state, surface charge/energy, hydrophilicity, biocompatibility, and catalytic reactivity/selectivity. The surface modification can be done in a well-controlled manner to produce nanoscale functional features through various methods and techniques, such as in situ surface reconstruction, film deposition, nanocoating, atom/ion doping, and integration of functional groups. This approach may be used in a wide range of advanced technological applications, such as nanoelectronics, memory, chemical sensors and biosensors, quantum computations/communications, catalysis, biological and medical products, clean energy and environmental industries, and so on.

This Special Issue will cover a wide range of recent experimental and computational progress in the design, fabrication, and characterization of innovative nanostructured materials that have had their surfaces modified with the aim of improving their nanostructure properties and functional performance, as well as new insights on physical principles underlying their properties and enormous potential applications. Because of the multidisciplinary nature of this research field, we welcome submissions from all relevant disciplines such as surface physics, surface chemistry, nanoscience and technology, topological quantum materials, anticorrosion materials, material science and engineering, nanocatalysis, renewable energy, biology, medications, and so on. 

The topics of interest include but are not limited to:

  1. Fabrication/synthesis of nanostructured materials with controlled surface structures, or compositions, or properties via bottom–up or top–down methods;
  2. Surface modifications on nanostructured materials such as 3D nanoparticles/clusters, 2D materials (graphene, phosphorene, transition metal dichalcogenide monolayers), or 1D materials (nanotubes, nanorods, and nanowires), with the aim of improving the nanomaterial’s properties or performance;
  3. Nanoengineering on surfaces of bulk materials or films at nanoscale to form nanotextured/nanofunctionalized surfaces, with the aim of bringing novel properties or functionalities over their bulk counterparts;
  4. Geometric/electronic structure characterization, elemental analysis, physical/chemical property, and functionality evaluation of the above nanostructured materials;
  5. Exploration of structure–property relationships of the above nanostructured materials;
  6. Theoretical calculations/simulation/prediction for understanding the properties/functionalities of the above nanostructured

Dr. Xiao Tong
Dr. Ioana Daniela Dulama
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. Coatings is an international peer-reviewed open access monthly 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

  • nanostructured materials
  • surface modification
  • nanoengineering
  • nanostructure–properties relationship
  • synthesis
  • characterization

Published Papers (5 papers)

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Research

13 pages, 2258 KiB  
Article
Stability of Polyethylene Glycol-Coated Copper Nanoparticles and Their Optical Properties
by Deborah Okyere, Ryan H. Manso, Xiao Tong and Jingyi Chen
Coatings 2022, 12(6), 776; https://doi.org/10.3390/coatings12060776 - 4 Jun 2022
Cited by 1 | Viewed by 3136
Abstract
Oxidation is a corrosion reaction where the corroded metal forms an oxide. Prevention of oxidation at the nanoscale is critically important to retain the physicochemical properties of metal nanoparticles. In this work, we studied the stability of polyethylene glycol (PEG) coated copper nanoparticles [...] Read more.
Oxidation is a corrosion reaction where the corroded metal forms an oxide. Prevention of oxidation at the nanoscale is critically important to retain the physicochemical properties of metal nanoparticles. In this work, we studied the stability of polyethylene glycol (PEG) coated copper nanoparticles (PEGylated CuNPs) against oxidation. The freshly-prepared PEGylated CuNPs mainly consist of metallic Cu which are quite stable in air although their surfaces are typically covered with a few monolayers of cuprous oxide. However, they are quickly oxidized in water due to the presence of protons that facilitate oxidation of the cuprous oxide to cupric oxide. PEG with carboxylic acid terminus could slightly delay the oxidation process compared to that with thiol terminus. It was found that a solvent with reducing power such as ethanol could greatly enhance the stability of PEGylated CuNPs by preventing further oxidation of the cuprous oxide to cupric oxide and thus retain the optical properties of CuNPs. The reducing environment also assists the galvanic replacement of these PEGylated CuNPs to form hollow nanoshells; however, they consist of ultra-small particle assemblies due to the co-reduction of gold precursor during the replacement reaction. As a result, these nanoshells do not exhibit strong optical properties in the near-infrared region. This study highlights the importance of solvent effects on PEGylated nonprecious metal nanoparticles against oxidation corrosion and its applications in preserving physicochemical properties of metallic nanostructures. Full article
(This article belongs to the Special Issue Surface Modification of Nanostructured Materials)
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19 pages, 12677 KiB  
Article
Novel Structures of Functionalized Graphene Oxide with Hydrazide: Characterization and Bioevaluation of Antimicrobial and Cytocompatibility Features
by Irina Zarafu, Carmen Limban, Cristiana Radulescu, Ioana Daniela Dulama, Diana Camelia Nuta, Cornel Chirita, Mariana Carmen Chifiriuc, Carmellina Daniela Badiceanu, Marcela Popa, Coralia Bleotu, Laura Denisa Dragu, Raluca Maria Stirbescu, Ioan Alin Bucurica, Sorina Geanina Stanescu and Petre Ionita
Coatings 2022, 12(1), 45; https://doi.org/10.3390/coatings12010045 - 31 Dec 2021
Cited by 3 | Viewed by 2021
Abstract
Graphite was oxidized to graphene oxide and activated by thionyl chloride, for further covalently linking three hydrazides with potential biological activity. The obtained materials were characterized by scanning electron microscopy with energy dispersive spectroscopy, Fourier-transform infrared and Raman spectroscopies. The presence of various [...] Read more.
Graphite was oxidized to graphene oxide and activated by thionyl chloride, for further covalently linking three hydrazides with potential biological activity. The obtained materials were characterized by scanning electron microscopy with energy dispersive spectroscopy, Fourier-transform infrared and Raman spectroscopies. The presence of various functional groups specific to graphene oxide (GO) functionalized with different hydrazides was confirmed by spectral data. The ratio between D- and G-bands, observed in Raman spectra, allowed for an evaluation of the disorder degree and the mean crystallite size of the samples. The micrographs highlighted that the samples lead to the occurrence of disorders, probably caused by the sp3 carbons, the formation of oxygen-containing functional groups in the basal planes, and by various structural defects. The new graphene oxide–hydrazide derivatives were tested for their antimicrobial and cytotoxicity activity. Their antimicrobial activity against planktonic and biofilm-embedded cells was inferior to that of free hydrazides, except for GO-3 against planktonic Escherichia coli and GO-2 against Pseudomonas aeruginosa biofilm, demonstrating that further optimization is needed to be able to exploit the huge potential of GO for developing potent antimicrobials. Full article
(This article belongs to the Special Issue Surface Modification of Nanostructured Materials)
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8 pages, 954 KiB  
Article
Clinical Application of Silver Nanoparticles Coated by Benzalkonium Chloride
by Shakeel Ahmed Ansari and Asim Muhammed Alshanberi
Coatings 2021, 11(11), 1382; https://doi.org/10.3390/coatings11111382 - 11 Nov 2021
Cited by 2 | Viewed by 1814
Abstract
The present study investigates the surface modification of AgNPs (synthesized by neem leaves) by benzalkonium chloride (BAC). It was observed that 22 × 109 CFU were formed at 0.25 mM AgNPs concentration. However, it was reduced to 14 × 109 CFU [...] Read more.
The present study investigates the surface modification of AgNPs (synthesized by neem leaves) by benzalkonium chloride (BAC). It was observed that 22 × 109 CFU were formed at 0.25 mM AgNPs concentration. However, it was reduced to 14 × 109 CFU for BAC-coated AgNPs at similar experimental conditions. The enzymatic activity of β-glucosidase was significantly enhanced from 0.0625 mM to 0.5 mM concentration of AgNPs, as well as BAC–AgNPs. However, there was no further change of activity beyond this concentration. ZOI of AgNPs and BAC–AgNPs was measured against E. coli, B. subtilis, P. aeruginosa, and S pneumoniae at 0.25 mM and 0.50 mM concentrations of these bioactive agents. ZOI was 3.45 cm and 3.56 cm for AgNPs and BAC–AgNPs at 0.25 mM of these bioactive agents, respectively, against E. coli. However, these values were 4.28 cm and 4.40 cm, respectively, against B. subtilis. ZOI was obtained at 3.36 cm and 3.47 cm, respectively, against P. aeruginosa under similar experimental concentrations. However, ZOI was achieved at 3.44 cm and 3.62 cm, respectively, against S. pneumonia, under similar experimental conditions. Hence, such research findings can be exploited for potential applications in numerous environmental and biomedical fields. Full article
(This article belongs to the Special Issue Surface Modification of Nanostructured Materials)
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16 pages, 7618 KiB  
Article
Quaternary Holey Carbon Nanohorns/SnO2/ZnO/PVP Nano-Hybrid as Sensing Element for Resistive-Type Humidity Sensor
by Bogdan-Catalin Serban, Cornel Cobianu, Octavian Buiu, Marius Bumbac, Niculae Dumbravescu, Viorel Avramescu, Cristina Mihaela Nicolescu, Mihai Brezeanu, Cristiana Radulescu, Gabriel Craciun, Cosmin Romanitan and Florin Constantin Comanescu
Coatings 2021, 11(11), 1307; https://doi.org/10.3390/coatings11111307 - 27 Oct 2021
Cited by 4 | Viewed by 1802
Abstract
In this study, a resistive humidity sensor for moisture detection at room temperature is presented. The thin film proposed as a critical sensing element is based on a quaternary hybrid nanocomposite CNHox//SnO2/ZnO/PVP (oxidated carbon nanohorns–tin oxide–zinc oxide–polyvinylpyrrolidone) at the w/ [...] Read more.
In this study, a resistive humidity sensor for moisture detection at room temperature is presented. The thin film proposed as a critical sensing element is based on a quaternary hybrid nanocomposite CNHox//SnO2/ZnO/PVP (oxidated carbon nanohorns–tin oxide–zinc oxide–polyvinylpyrrolidone) at the w/w/w/w ratios of 1.5/1/1/1 and 3/1/1/1. The sensing structure consists of a Si/SiO2 dielectric substrate and interdigitated transducers (IDT) electrodes, while the sensing film layer is deposited through the drop-casting method. Morphology and composition of the sensing layers were investigated through scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), X-ray diffraction, and Raman spectroscopy. Each quaternary hybrid nanocomposite-based thin film’s relative humidity (RH) sensing capability was analyzed by applying a direct current with known intensity between two electrodes and measuring the voltage difference when varying the RH from 0% to 100% in a humid nitrogen atmosphere. While the sensor with CNHox/SnO2/ZnO/PVP at 1.5/1/1/1 as the sensing layer has the better performance in terms of sensitivity, the structure employing CNHox//SnO2/ ZnO/PVP at 3/1/1/1 (mass ratio) as the sensing layer has a better performance in terms of linearity. The contribution of each component of the quaternary hybrid nanocomposites to the sensing performance is discussed in relation to their physical and chemical properties. Several alternative sensing mechanisms were taken into consideration and discussed. Based on the measured sensing results, we presume that the impact of the p-type semiconductor behavior of CNHox, in conjunction with the swelling of the hydrophilic polymer, is dominant and leads to the overall increasing resistance of the sensing film. Full article
(This article belongs to the Special Issue Surface Modification of Nanostructured Materials)
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10 pages, 2554 KiB  
Article
Copper Oxide Decorated Zinc Oxide Nanostructures for the Production of a Non-Enzymatic Glucose Sensor
by Chung-En Cheng, Sripansuang Tangsuwanjinda, Hsin-Ming Cheng and Po-Han Lee
Coatings 2021, 11(8), 936; https://doi.org/10.3390/coatings11080936 - 4 Aug 2021
Cited by 11 | Viewed by 3685
Abstract
The glucose concentration in human blood can have a worrisome impact on human health, so the distribution of blood glucose contaminants in the human body is an important indicator that can be used to monitor diabetes. Diabetes affects many parts of the human [...] Read more.
The glucose concentration in human blood can have a worrisome impact on human health, so the distribution of blood glucose contaminants in the human body is an important indicator that can be used to monitor diabetes. Diabetes affects many parts of the human body, such as neurological impairment, erectile dysfunction, and hardening of the arteries resulting in organ loss. In this study, cyclic voltammetry (CV) was used to process the electrical properties of a solution by preparing electrodes with CuO nanoparticles modified ZnO tetrapod nanostructures deposited on fluorine-doped tin oxide glass (CuO/ZnO/FTO). The measurements were processed in glucose solutions of different concentrations purposing for developing the sensitivity of the sensor. Different immersion times in the precursor copper sulfate solution were also used for preparing the electrode and carried out for electrochemical studies to adjust the electrode capability. The modified electrode, which was immersed in copper sulfate for 30 s, was efficient in detecting glucose molecules in different concentrations at the potential of +0.6 V. The rising slope is strongly and positively correlated with the concentration of glucose. One of the significant results is the indication that glucose concentration is linearly proportional to the current value of CV. After the measurement test with the addition of interference, the sensor can still identify the glucose concentration in the solution without being affected. This result proves that the sensor has considerable potential for developing into a high-performance non-enzymatic glucose sensor. Full article
(This article belongs to the Special Issue Surface Modification of Nanostructured Materials)
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