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Applications of Advanced Nanomaterials
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Applications of Advanced Nanomaterials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 16078

Special Issue Editors

Prof. Nag Jung Choi

E-Mail Website
Guest Editor
Jeonbuk National University
Special Issues, Collections and Topics in MDPI journals
Dr. Jun Cong Ge

E-Mail Website
Guest Editor
Division of Mechanical Design Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Republic of Korea
Interests: alternative fuels; diesel engine; combustion; emission; particle morphology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the rapid development in science and technology, nanotechnology is constantly being updated, and people are paying more and more attention to nanomaterials. Nanomaterials, as contemporary emerging materials, have excellent physicochemical properties, such as huge surface-to-volume ratio and very high porosity and reactivity. Based on the above advantages, nanomaterials have been widely used in different fields, such as information technology, homeland security, medicine, transportation, energy storage, food safety, and environmental remediation. The physical and chemical characteristics of nanoparticles and nanofibers, including their sizes, shapes, chemical compositions, physical and chemical stability, crystal structures, surface areas, surface energy, and surface roughness, play an important role in the application of functional nanomaterials. Therefore, the Special Issue aims to study the physicochemical properties of nanomaterials and the effects of their unique characteristics on applications. In the future, nanomaterials will develop in an all-round way towards lighter, smaller, stronger, cleaner, greener, safer, more efficient, and multifunctional integration. This is a very interesting and novel topic. Hereby, we sincerely welcome all colleagues at home and abroad to submit your contributions to this Special Issue.

Topics for this Special Issue include but are not limited to the following:

  • Nanomaterials for Air Purification
  • Nanomaterials for Water Treatment
  • Nanomaterials for Energy Storage
  • Nanomaterials for Battery
  • Nanomaterials for Sensors
  • Nanomaterials for Healthcare
  • Nanomaterials for Catalysis
  • Nanomaterials for Antimicrobial Agents
  • Other Functional Nanocomposites
Prof. Dr. Nag Jung Choi
Prof. Dr. Jun Cong Ge
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. Applied Sciences 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

  • nanotechnology
  • nanomaterials
  • multifunctional nanocomposites
  • nanoparticles
  • nanofibers

Published Papers (5 papers)

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Research

13 pages, 2519 KiB  
Article
Effect of Hydrophobic Silica Nanochannel Structure on the Running Speed of a Colloidal Damper
by Gengbiao Chen and Zhiwen Liu
Appl. Sci. 2021, 11(15), 6808; https://doi.org/10.3390/app11156808 - 24 Jul 2021
Cited by 1 | Viewed by 1488
Abstract
A colloidal damper (CD) can dissipate a significant amount of vibrations and impact energy owing to the interface power that is generated when it is used. It is of great practical significance to study the influence of the nanochannel structure of hydrophobic silica [...] Read more.
A colloidal damper (CD) can dissipate a significant amount of vibrations and impact energy owing to the interface power that is generated when it is used. It is of great practical significance to study the influence of the nanochannel structure of hydrophobic silica gel in the CD damping medium on the running speed of the CD. The fractal theory was applied to observe the characteristics of the micropore structure of the hydrophobic silica gel by scanning electron microscopy (SEM), the primary particles were selected to carry out fractal analysis, and the two-dimensional fractal dimension of the pore area and the tortuous fractal dimension of the hydrophobic silica gel pore structure were calculated. The fractal percolation model of water in hydrophobic silica nanochannels based on the slip theory could thus be obtained. This model revealed the relationship between the micropore structure parameters of the silica gel and the running speed of the CD. The CD running speed increases with the addition of grafted molecules and the reduction in pore size of the silica gel particles. Continuous loading velocity testing of the CD loaded with hydrophobic silica gels with different pore structures was conducted. By comparing the experimental results with the calculation results of the fractal percolation model, it was determined that the fractal percolation model can better characterize the change trend of the CD running velocity for the first loading, but the fractal dimension was changed from the second loading, caused by the small amount of water retained in the nanochannel, leading to the failure of fractal characterization. Full article
(This article belongs to the Special Issue Applications of Advanced Nanomaterials)
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0 pages, 5128 KiB  
Article
RETRACTED: Biomaterial-Modified Magnetic Nanoparticles γ-Fe2O3, Fe3O4 Used to Improve the Efficiency of Hyperthermia of Tumors in HepG2 Model
by Shang Zhao and Seoksoon Lee
Appl. Sci. 2021, 11(5), 2017; https://doi.org/10.3390/app11052017 - 25 Feb 2021
Cited by 7 | Viewed by 3399 | Retraction
Abstract
The main treatments for cancer recorded to date include chemotherapy, radiotherapy, and surgery. Although we have achieved great success in treating certain types of tumors, there are still many incurable even with the help of modern treatments. Currently, the principles of magnetic-induction hyperthermia [...] Read more.
The main treatments for cancer recorded to date include chemotherapy, radiotherapy, and surgery. Although we have achieved great success in treating certain types of tumors, there are still many incurable even with the help of modern treatments. Currently, the principles of magnetic-induction hyperthermia in magnetic nanoparticle hyperthermia are considered an effective treatment for cancer cells. As reported in previous articles, these nanoparticles generate a lot of heat that raises the temperatures of tumors, hence treating the cancer cells. The other significant potential of magnetic nanoparticles is the ability to combine heat and drug release for cancer treatment. However, within the biologically safe range of AC magnetic fields, the lack of induction heating power and the high criteria for biocompatibility in superparamagnetic-nanoparticle hyperthermia agents still make up the key challenges for the successful clinical application of magnetic hyperthermia. In this study, two different types of iron oxide nanoparticles (γ-Fe2O3, Fe3O4) were modified with whey protein isolate (WPI) to form bio-modified superparamagnetic nanoparticles with spherical or diamond-shaped structures and diameters between 20 and 100 nm, which demonstrate excellent stability under different conditions. Adriamycin (ADM) has also been successfully loaded onto these nanoparticles and used in this experiment. In vitro and in vivo experimental studies were performed using these WPI-modified nanoparticles on HepG2 tumor models and mice to assess their bioavailability and biological feasibility. The results prove that these WPI-modified nanoparticles perform satisfactorily in conjunction with hyperthermia to cure tumors completely. Full article
(This article belongs to the Special Issue Applications of Advanced Nanomaterials)
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12 pages, 2094 KiB  
Article
Development of In-Situ Poled Nanofiber Based Flexible Piezoelectric Nanogenerators for Self-Powered Motion Monitoring
by Minjung Kim, Vignesh Krishnamoorthi Kaliannagounder, Afeesh Rajan Unnithan, Chan Hee Park, Cheol Sang Kim and Arathyram Ramachandra Kurup Sasikala
Appl. Sci. 2020, 10(10), 3493; https://doi.org/10.3390/app10103493 - 18 May 2020
Cited by 16 | Viewed by 3232
Abstract
Energy harvesting technologies have found significant importance over the past decades due to the increasing demand of energy and self-powered design of electronic and implantable devices. Herein, we demonstrate the design and application of in situ poled highly flexible piezoelectric poly vinylidene fluoride [...] Read more.
Energy harvesting technologies have found significant importance over the past decades due to the increasing demand of energy and self-powered design of electronic and implantable devices. Herein, we demonstrate the design and application of in situ poled highly flexible piezoelectric poly vinylidene fluoride (PVDF) graphene oxide (GO) hybrid nanofibers in aligned mode for multifaceted applications from locomotion sensors to self-powered motion monitoring. Here we exploited the simplest and most versatile method, called electrospinning, to fabricate the in situ poled nanofibers by transforming non-polar α-phase of PVDF to polar β- phase structures for enhanced piezoelectricity under high bias voltage. The flexible piezoelectric device fabricated using the aligned mode generates an improved output voltage of 2.1 V at a uniform force of 12 N. The effective piezoelectric transduction exhibited by the proposed system was tested for its multiple efficacies as a locomotion detector, bio-e-skin, smart chairs and so on. Full article
(This article belongs to the Special Issue Applications of Advanced Nanomaterials)
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17 pages, 3774 KiB  
Article
Implementation of High Gas Barrier Laminated Films Based on Cellulose Nanocrystals for Food Flexible Packaging
by Ghislain Fotie, Stefano Gazzotti, Marco Aldo Ortenzi and Luciano Piergiovanni
Appl. Sci. 2020, 10(9), 3201; https://doi.org/10.3390/app10093201 - 4 May 2020
Cited by 14 | Viewed by 3772
Abstract
In this work, three types of cellulose nanocrystals (CNCs) were used: CNCSO3H extracted from wood pulp by sulfuric acid (H2SO4), CNCCOOH extracted from cotton linters by ammonium persulfate (APS) and CNCCOOR obtained by esterification of the [...] Read more.
In this work, three types of cellulose nanocrystals (CNCs) were used: CNCSO3H extracted from wood pulp by sulfuric acid (H2SO4), CNCCOOH extracted from cotton linters by ammonium persulfate (APS) and CNCCOOR obtained by esterification of the previous two CNCCOOH and CNCSO3H. For a comparative assessment of gas barrier performance, plastic films such as PLA, PET, PE, PP, OPP and OPA were selected, coated with the three types of CNCs and finally laminated with a solvent-based polyurethanic adhesive. First, all dispersed CNCs were characterized by apparent hydrodynamic diameter and Z potential by means of dynamic light scattering (DLS) and electrophoretic light scattering (ELS) techniques, respectively, followed by the crystallinity index (XRD), thermogravimetric analysis (TGA) and evaluation of Fourier-transform infrared spectroscopy (FTIR), as well as the charges density. The surface chemistry of coated plastics (CNCs-P) was assessed by the Z potential through the electrokinetic technique (streaming potential method) and the optical contact angle (OCA). Lastly, laminated films (P-CNC-P) were evaluated by gas permeability measurements at 23 °C and 50–80% RH. It is worth noting that improvements between 90% and 100% of oxygen barrier were achieved after the lamination. This paper provides insights on the choice of cellulosic nanomaterials for the design and development of advanced and sustainable food packaging materials. Full article
(This article belongs to the Special Issue Applications of Advanced Nanomaterials)
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13 pages, 4285 KiB  
Article
Evaluation of the Food Contact Suitability of Aged Bio-Nanocomposite Materials Dedicated to Food Packaging Applications
by Anaïs Lajarrige, Nathalie Gontard, Sébastien Gaucel and Stéphane Peyron
Appl. Sci. 2020, 10(3), 877; https://doi.org/10.3390/app10030877 - 28 Jan 2020
Cited by 10 | Viewed by 3348
Abstract
Nanocomposite materials based on bio-polyesters (PBSA and PHBV) have been evaluated for their suitability for food contact according to the recommendations defined for non-biodegradable plastic materials, and subsequently, according to accelerated aging treatment. On the basis of the limited number of material/migrant/food simulant [...] Read more.
Nanocomposite materials based on bio-polyesters (PBSA and PHBV) have been evaluated for their suitability for food contact according to the recommendations defined for non-biodegradable plastic materials, and subsequently, according to accelerated aging treatment. On the basis of the limited number of material/migrant/food simulant combinations studied here, the test for migration, using food simulants, appeared directly applicable to testing such materials which are not considered humidity-sensitive materials. Considering the only compliance criterion that must be met by the materials in contact, the materials submitted to the aging processing are not of safety concern and the incorporation of nanoclays in aged biodegradable materials does not interfere with their inertial properties in a dramatic way. At the molecular scale, the UV irradiation proved to induce an increase in the degree of crystallinity, resulting in a modification of transport properties of both packaging materials. The values of overall migration and specific migration were reduced without decreasing the diffusion coefficients of the target additives. The UV treatment and the addition of nanoparticles, therefore, seem to jointly promote the retention of organic compounds in the materials by increasing their affinity for packaging material. Full article
(This article belongs to the Special Issue Applications of Advanced Nanomaterials)
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