Special Issue "Functional Nanomaterials for Material Characterization and Chemical Analysis"

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

Deadline for manuscript submissions: 31 March 2022.

Special Issue Editor

Prof. Dr. C. Bor Fuh
E-Mail Website
Guest Editor
National Chi Nan University, Puli, Taiwan
Interests: magnetic immunoassay; multifunctional nanoparticles; thin channel separation; for analytical and biochemical analyses

Special Issue Information

Dear Colleagues,

Functional nanomaterials have developed rapidly and been widely used for various applications in industries, biochemistry, and biomedicine in recent years. The advantages of functional nanomaterials are known to enhance sensitivity, selectivity, and reproducibility with high surface reactivity, size-dependent properties, and thermal stability used in many new applications. Therefore, combing functional nanomaterials with analytical methodology has great potential for material characterization and chemical analysis. Novel Functional nanomaterials including nanoparticles or nanocomposites with different functional properties have been prepared, characterized, and applied in various fields. This Special Issue will provide updated novel functional nanomaterials with an analytical methodology for material characterization and chemical analysis. The Special Issue will provide references for simple, fast, sensitive, and selective chemical analysis and material characterization for particles, proteins, and other materials using functional or multifunctional nanomaterials.

Prof. Dr. C. Bor Fuh
Guest Editor

Manuscript Submission Information

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Keywords

  • functional nanomaterials
  • multifunctional nanomaterials
  • analytical methodology
  • material characterization
  • chemical analysis

Published Papers (4 papers)

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Research

Article
Functional Nanoparticles with Magnetic 3D Covalent Organic Framework for the Specific Recognition and Separation of Bovine Serum Albumin
Nanomaterials 2022, 12(3), 411; https://doi.org/10.3390/nano12030411 (registering DOI) - 26 Jan 2022
Abstract
Glutathione functionalized magnetic 3D covalent organic frameworks combined with molecularly imprinted polymer (magnetic 3D COF–GSH MIPs) were developed for the selective recognition and separation of bovine serum albumin (BSA). Ultrasonication was used to prepare magnetic 3D COFs with high porosity (~1 nm) and [...] Read more.
Glutathione functionalized magnetic 3D covalent organic frameworks combined with molecularly imprinted polymer (magnetic 3D COF–GSH MIPs) were developed for the selective recognition and separation of bovine serum albumin (BSA). Ultrasonication was used to prepare magnetic 3D COFs with high porosity (~1 nm) and a large surface area (373 m2 g−1). The magnetic 3D COF–GSH MIP nanoparticles had an imprinting factor of 4.79, absorption capacity of 429 mg g−1, magnetic susceptibility of 32 emu g-1, and five adsorption–desorption cycles of stability. The proposed method has the advantages of a shorter equilibrium absorption time (1.5 h), higher magnetic susceptibility (32 emu g-1), and larger imprinting factor (4.79) compared with those reported from other studies. The magnetic 3D COF–GSH MIPs used with BSA had selectivity factors of 3.68, 2.76, and 3.30 for lysozyme, ovalbumin, and cytochrome C, respectively. The successful recognition and separation of BSA in a real sample analysis verified the capability of the magnetic 3D COF–GSH MIP nanoparticles. Full article
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Article
Rapid Preparation of Fluorescent Carbon Dots from Pine Needles for Chemical Analysis
Nanomaterials 2022, 12(1), 66; https://doi.org/10.3390/nano12010066 - 28 Dec 2021
Viewed by 372
Abstract
Fluorescent carbon dots with blue, green, and red emissions were rapidly prepared from modified pine needles through microwave irradiation in a one-pot reaction. The fluorescence intensity and emission versatility for a carbon source were experimentally optimized. The reaction times were under 10 min [...] Read more.
Fluorescent carbon dots with blue, green, and red emissions were rapidly prepared from modified pine needles through microwave irradiation in a one-pot reaction. The fluorescence intensity and emission versatility for a carbon source were experimentally optimized. The reaction times were under 10 min and the reaction temperatures were lower than 220 °C. Potential applications of magnetic fluorescence-linked immunoassays of carcinoembryonic antigen (CEA) and tumor necrosis factor-alpha (TNF-α) were presented. The detection limits for CEA and TNF-α (3.1 and 2.8 pg mL−1, respectively) are lower than those presented in other reports, whereas the linear ranges for CEA and TNF-α (9 pg mL−1 to 18 ng mL−1 and 8.5 pg mL−1 to 17 ng mL−1, respectively) are wider than those presented in other reports. Magnetic immunoassays with fluorescent CDs prepared from pine needles can enable rapid, sensitive, and selective detections for biochemical analysis. Full article
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Article
Advanced Optical Detection through the Use of a Deformably Transferred Nanofilm
Nanomaterials 2021, 11(3), 816; https://doi.org/10.3390/nano11030816 - 23 Mar 2021
Cited by 2 | Viewed by 686
Abstract
Graphene has been extensively investigated in advanced photodetection devices for its broadband absorption, high carrier mobility, and mechanical flexibility. Due to graphene’s low optical absorptivity (2.3%), graphene-based photodetection research so far has focused on hybrid systems to increase photoabsorption. However, such hybrid systems [...] Read more.
Graphene has been extensively investigated in advanced photodetection devices for its broadband absorption, high carrier mobility, and mechanical flexibility. Due to graphene’s low optical absorptivity (2.3%), graphene-based photodetection research so far has focused on hybrid systems to increase photoabsorption. However, such hybrid systems require a complicated integration process and lead to reduced carrier mobility due to heterogeneous interfaces. Crumpled or deformed graphene has previously been reported in electronics and optoelectronics. However, a depth study on the influence of the morphology of nanofilms (e.g., graphite or graphene) related to light absorption in photodetection devices has not been demonstrated yet. Here, we present an interesting study in terms of the effect of the deformable surface and the smooth surface of a nanofilm transferred onto Si through two transfer strategies using isopropanol injection and nitrogen blowing (to form a deformable nanofilm surface) and deionized water injection and van der Waals interaction (to form a smooth nanofilm surface). As a result, optical detection in the case of the deformable nanofilm surface was enhanced significantly (~100%) compared with that of the smooth nanofilm surface in the visible laser wavelength (532 nm). In addition, evidence from the computational simulation also firmly affirms an advancement in the optical detection of deformed nanofilm-surface-based photodetection devices compatible with the experimental results. Full article
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Article
Fabrication of Magnetic Molecularly Imprinted Beaded Fibers for Rosmarinic Acid
Nanomaterials 2020, 10(8), 1478; https://doi.org/10.3390/nano10081478 - 28 Jul 2020
Cited by 4 | Viewed by 1003
Abstract
The present study describes the fabrication of molecularly imprinted (MI) magnetic beaded fibers using electrospinning. Rosmarinic acid was selected as exemplary yet relevant template during molecular imprinting. A “design of experiments” methodology was used for optimizing the electrospinning process. Four factors, i.e., the [...] Read more.
The present study describes the fabrication of molecularly imprinted (MI) magnetic beaded fibers using electrospinning. Rosmarinic acid was selected as exemplary yet relevant template during molecular imprinting. A “design of experiments” methodology was used for optimizing the electrospinning process. Four factors, i.e., the concentration of the biodegradable polymer (polycaprolactone), the applied voltage, the flow rate, and the collector distance were varied in a central composite design. The production process was then optimized according to the suitability of the beaded fibers during microrobot fabrication, actuation, and drug release. The optimum average fiber diameter of MI beaded fibers was determined at 857 ± 390 nm with an average number of beads at 0.011 ± 0.002 per µm2. In vitro release profiles of the optimized MI beaded fibers revealed a lower burst rate and a more sustained release when compared to control fibers. Magnetic control of the MI beaded fibers was successfully tested by following selected waypoints along a star-shaped predefined trajectory. This study innovatively combines molecular imprinting technology with magnetic microrobots enabling targeted drug delivery systems that offer precise motion control via the magnetic response of microrobots along with selective uptake of a drug into the microrobot using MI beaded fibers in future. Full article
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