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Synthesis and Characterization Techniques for Nanomaterials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Materials Characterization".

Deadline for manuscript submissions: 20 January 2025 | Viewed by 1461

Special Issue Editor


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Guest Editor
Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, km 139.7, P-2695-066 Bobadela, Portugal
Interests: nanomaterials; nanoparticles; crystals; nuclear material; nanocrystals; characterization technique

Special Issue Information

Dear Colleagues,

Research on the engineering of materials on a nanometric scale was triggered by a visionary lecture by Richard Feynman, “There’s plenty of room at the bottom”. Nanomaterials are omnipresent and have a wide range of applications in photonics, microelectronics, metallurgy, catalysis, energy, medicine, and many other fields.

Techniques for the synthesis and characterization of nanomaterials are essential for understanding and manipulating materials’ unique properties at the nanoscale. This variety of uses for nanomaterials is mirrored by an equally large diversity of methods of synthesizing them, including top-down methods—e.g., ion implantation, laser ablation, sol–gel, chemical vapor deposition, ball milling, and chemical reactions—or bottom-up approaches such as molecular beam epitaxy and self-controlling growth in solutions. Characterization techniques such as electron microscopy, X-ray diffraction, and spectroscopy are then employed to analyze the size, shape, structure, and composition of nanomaterials. Characterizing the properties of these nanomaterials can be performed using almost all of the techniques available in physics, chemistry, and engineering.

This Special Issue offers authors a platform to present their latest research, as well as comprehensive reviews or articles, on the synthesis and characterization of nanomaterials in any field of application or fundamental investigation.

Dr. Andreas Kling
Guest Editor

Manuscript Submission Information

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Keywords

  • nanomaterials
  • ion implantation
  • laser ablation
  • sol–gel
  • chemical vapor deposition
  • ball milling
  • chemical reactions
  • electron microscopy
  • X-ray diffraction
  • spectral characterization

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Published Papers (2 papers)

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Research

15 pages, 2341 KiB  
Article
Green Synthesis of CuO Nanoparticles—Structural, Morphological, and Dielectric Characterization
by Joana Neiva, Zohra Benzarti, Sandra Carvalho and Susana Devesa
Materials 2024, 17(23), 5709; https://doi.org/10.3390/ma17235709 - 22 Nov 2024
Viewed by 74
Abstract
This study investigates the structural, chemical, and morphological properties of CuO nanoparticles synthesized via a green synthesis route using Opuntia ficus-indica cladode extract, with a focus on the effects of stepwise versus direct calcination. Raman spectroscopy revealed the presence of CuO, [...] Read more.
This study investigates the structural, chemical, and morphological properties of CuO nanoparticles synthesized via a green synthesis route using Opuntia ficus-indica cladode extract, with a focus on the effects of stepwise versus direct calcination. Raman spectroscopy revealed the presence of CuO, Na2CO3, and Na2SO3, with the latter two being associated with elements inherited from the cactus extracts. XRD patterns confirmed the presence of crystalline CuO and Na2CO3 phases, with the low content of Na2SO3 inferred to be amorphous. Rietveld refinement estimated a CuO content of approximately 77% in the stepwise-calcined sample and 75% in the directly calcined sample, with lattice parameters closely aligning with reference values. SEM micrographs revealed a tendency for CuO nanoparticles to aggregate, likely due to high surface energy and interaction with the viscous plant extract used in the green synthesis. Crystallite size estimates, along with morphological observations, suggest that stepwise calcination enhances crystallinity and particle definition without altering the fundamental nanoparticle morphology. These findings highlight the influence of calcination method and natural extracts on the composition and morphology of green-synthesized CuO nanoparticles, offering insights into potential applications, namely in microelectronics, due to their promising dielectric properties. Full article
(This article belongs to the Special Issue Synthesis and Characterization Techniques for Nanomaterials)
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11 pages, 4905 KiB  
Article
Hierarchically Graphitic Carbon Structure Derived from Metal Ions Impregnated Harmful Inedible Seaweed as Energy-Related Material
by Yun-Mi Song, Hui Gyeong Park and Jung-Soo Lee
Materials 2024, 17(18), 4643; https://doi.org/10.3390/ma17184643 - 21 Sep 2024
Viewed by 1047
Abstract
This study explored the development of hierarchical graphitic carbon structures (HGCs) from harmful inedible seaweed waste harvested in the summer. Elevated sea temperatures during the summer increase the cellulose content of seaweeds, making them unsuitable for consumption. By utilizing seaweed biomass, this study [...] Read more.
This study explored the development of hierarchical graphitic carbon structures (HGCs) from harmful inedible seaweed waste harvested in the summer. Elevated sea temperatures during the summer increase the cellulose content of seaweeds, making them unsuitable for consumption. By utilizing seaweed biomass, this study addresses critical marine environmental issues and provides a sustainable solution for promising electrode materials for energy storage devices. The fabrication process involved impregnating seaweed with Ni ions, followed by annealing to create a highly crystalline carbon structure. Subsequent etching produced numerous nano-sized pores and a large surface area (806 m2/g), significantly enhancing the number of electrically active sites. The resulting HGCs exhibited a high capacitance and maintained their capacity even after 10,000 cycles in fast-current systems. This innovative approach not only mitigates the environmental burden of seaweed waste but also offers a sustainable method for converting it into efficient energy storage materials. Full article
(This article belongs to the Special Issue Synthesis and Characterization Techniques for Nanomaterials)
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