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Materials, Volume 18, Issue 6

March-2 2025 - 201 articles

Cover Story: UV-stimulated optoelectronic synaptic devices based on ZnO nanoparticles (NPs) on sapphire substrates exhibit promising synaptic behavior for neuromorphic computing. Thermal annealing in different atmospheres significantly influences device performance. In particular, nitrogen annealing enhances synaptic characteristics by increasing oxygen vacancy concentration, leading to stronger excitatory postsynaptic currents (EPSCs), enhanced persistent photoconductivity (PPC), and improved memory retention. In contrast, oxygen annealing reduces defect states, resulting in faster signal decay and limited PPC. These findings demonstrate that nitrogen-treated ZnO NPs provide superior optoelectronic synaptic performance, highlighting their potential as key materials for next-generation light-driven neuromorphic systems. View this paper
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Articles (201)

  • Article
  • Open Access
836 Views
15 Pages

Physical and Mechanical Properties of Cement Mortars with Recycled Polyethylene Terephthalate: Influence of Grain Size and Composition

  • Andrea Petrella,
  • Francesco Todaro,
  • Pravendra Yadav,
  • Jennifer Gubitosa and
  • Michele Notarnicola

20 March 2025

Polyethylene terephthalate (PET) with different grain size after grinding (fine and coarse) was recycled and used as aggregate for non-conventional lightweight cement mortars. The physical and mechanical characteristics were compared to conventional...

  • Review
  • Open Access
21 Citations
5,535 Views
58 Pages

Reviewing Additive Manufacturing Techniques: Material Trends and Weight Optimization Possibilities Through Innovative Printing Patterns

  • Arturo Ramos,
  • Virginia G. Angel,
  • Miriam Siqueiros,
  • Thaily Sahagun,
  • Luis Gonzalez and
  • Rogelio Ballesteros

20 March 2025

Additive manufacturing is transforming modern industries by enabling the production of lightweight, complex structures while minimizing material waste and energy consumption. This review explores its evolution, covering historical developments, key t...

  • Article
  • Open Access
5 Citations
938 Views
16 Pages

Three-Dimensional-Printed Biomimetic Structural Ceramics with Excellent Tribological Properties

  • Zhaozhi Wang,
  • Yajie Liu,
  • Biao Jiang,
  • Zhiheng Xin and
  • Zhibin Jiao

20 March 2025

Inspired by the ventral scale structure of the oriental sand boa, this study successfully fabricated multiscale bioinspired alumina (Al2O3) ceramics by combining the excellent mechanical properties, high-temperature resistance, and high hardness of c...

  • Article
  • Open Access
1 Citations
761 Views
13 Pages

Thermoelectric Properties of Tetrahedrites Produced from Mixtures of Natural and Synthetic Materials

  • Beatriz A. Santos,
  • Luís Esperto,
  • Isabel Figueira,
  • João Mascarenhas,
  • Elsa B. Lopes,
  • Rute Salgueiro,
  • Teresa P. Silva,
  • José B. Correia,
  • Daniel de Oliveira and
  • António P. Gonçalves
  • + 1 author

20 March 2025

Thermoelectric materials have considerable potential in the mitigation of the global energy crisis, through their ability to convert heat into electricity. This study aims to valorize natural resources, and potentially reduce production costs, by inc...

  • Article
  • Open Access
960 Views
17 Pages

Research on Dynamic Mechanical Properties of Silicon Carbide-Modified Concrete

  • Tao Chen,
  • Qingwei Chen,
  • Yang Yu,
  • Erlei Bai,
  • Li Wang,
  • Yanqin Guo and
  • Ang Li

20 March 2025

This research investigates the dynamic mechanical properties of silicon carbide-modified concrete using a ∅ 100 mm large-diameter split Hopkinson pressure bar (SHPB). The effects of silicon carbide content, particle size, and strain rate on dyn...

  • Article
  • Open Access
1 Citations
682 Views
16 Pages

20 March 2025

Abundant valuable metals such as manganese and cobalt are present in cobalt-rich slags from the hydrometallurgical zinc industry. However, due to the high cost of traditional hydrometallurgical separation methods, these metals cannot be effectively r...

  • Article
  • Open Access
2 Citations
846 Views
16 Pages

Al Doping Effect on Enhancement of Nonlinear Optical Absorption in Amorphous Bi2Te3 Thin Films

  • Tengfei Zhang,
  • Shenjin Wei,
  • Shubo Zhang,
  • Menghan Li,
  • Jiawei Wang,
  • Jingze Liu,
  • Junhua Wang,
  • Ertao Hu and
  • Jing Li

20 March 2025

Bismuth telluride (Bi2Te3) has attracted significant attention due to its broadband ultrafast optical response and strong nonlinearity at high laser fluence in the field of optoelectronic materials. The objective of this work is to study the effect o...

  • Feature Paper
  • Article
  • Open Access
1 Citations
946 Views
11 Pages

20 March 2025

The dehydration of methanol to produce light olefins and gasoline, known as MTO (methanol-to-olefins) process requires acidic catalysts that maintain their acidity at reaction temperatures. Zeolites, such as SAPOs and ZSM-5, are commonly used for thi...

  • Article
  • Open Access
1,711 Views
16 Pages

Aging Effect on Push-Out Bond Strength of Six Resin Cements: An In Vitro Study

  • Eugenia Baena,
  • Nuria Escribano,
  • Victoria Fuentes,
  • Isabel Reche and
  • Laura Ceballos

20 March 2025

The number of resin cements marketed for fiber post cementation has increased significantly. This study compared the push-out bond strength (PBS) of self-adhesive and universal resin cements used to lute fiber posts at 24 h and after 6 months of agin...

  • Article
  • Open Access
1 Citations
725 Views
21 Pages

Prediction Models for Radiological Characterization of Natural Aggregates Based on Chemical Composition and Mineralogy

  • Andrés Caño,
  • María del Mar Alonso,
  • Alicia Pachón-Montaño,
  • Queralt Marzal,
  • Guillermo Hernáiz,
  • Luís Sousa and
  • José Antonio Suárez-Navarro

20 March 2025

The radiological characterization of aggregates used in construction materials is essential to determine their suitability from a radiological protection perspective and to ensure their safety for health and the environment. While the activity concen...

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Materials - ISSN 1996-1944