Special Issues

Crystals publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Microstructure and Mechanical Behaviour of Structural Materials: 3rd Edition
edited by Saif Haider Kayani and Byung-Joo Kim
submission deadline 20 Mar 2026 | Viewed by 84 | Submission Open
Keywords: Fe alloys and steels; lightweight alloys; powder metallurgy; microstructural analysis; deformation analysis
(This special issue belongs to the Section Crystalline Metals and Alloys)
Nanocrystalline Materials Processing and Characterization submission deadline 30 Mar 2026 | Viewed by 354 | Submission Open
Keywords: nanomaterials; nanostructures; advanced materials; additive manufacturing; mechanical alloying; spark plasma sintering; functional materials; biomaterials; annealing; simulation and modelling
Structural Studies in Drug Discovery and Development: From the Lead to the Pharmaceutical Form, 2nd Edition submission deadline 31 Mar 2026 | 3 articles | Viewed by 4656 | Submission Open
Keywords: single-crystal X-ray diffraction; structural analysis; spectroscopic methods; spectrometric methods; pharmaceutical compounds; biologically active molecules; organic molecules; metal complexes; synthetic intermediates; atropisomers; absolute configuration; asymmetric synthesis; catalysis; mechanistic investigations; polymorphism; co-crystals; solubility
(This special issue belongs to the Section Crystal Engineering)
Polymorphism and Phase Transitions in Crystal Materials submission deadline 31 Mar 2026 | 3 articles | Viewed by 3530 | Submission Open
Keywords: polymorph; polymorphism; phase transition; form change; crystal; cocrystal; solid; pharmaceutical; solid state
(This special issue belongs to the Section Crystal Engineering)
Research in Ferromagnetic Materials submission deadline 31 Mar 2026 | Viewed by 904 | Submission Open
Keywords: ferromagnetic materials; external magnetic field; magnetization; Curie temperature; hysteresis; magnetocaloric effect; modeling methods; innovative applications
Nanostructured Functional Materials: Structure, Properties, and Emerging Applications submission deadline 31 Mar 2026 | Viewed by 263 | Submission Open
Keywords: nanostructured materials; structure– property relationships; advanced functional materials; biomedical and environmental applications; materials for water treatment and energy
Density Functional Theory in Optoelectronic Materials submission deadline 31 Mar 2026 | Viewed by 227 | Submission Open
Keywords: first-principles study; electrodeposition technique; thin-film deposition; electronic structure; optical properties; metal oxide semiconductors; quantum mechanical modeling; 2D materials; XRD analysis; SEM/EDX characterization
Advances in Photocatalytic Technology and Materials submission deadline 31 Mar 2026 | Viewed by 156 | Submission Open
Keywords: photocatalytic materials; nanostructured photocatalysts; scalable solar fuel production; hydrogen generation; photoelectrochemical; charge transfer separation; CO2 valorization; semiconductor interfaces; photocatalytic structural modification; photocatalytic reforming
(This special issue belongs to the Section Materials for Energy Applications)
Microstructural Engineering in Powder Metallurgy and Additive Manufacturing Alloys
edited by José M. Mendoza-Duarte, and
submission deadline 10 Apr 2026 | Viewed by 220 | Submission Open
Keywords: aluminum-based alloys; metal matrix composites; high-energy ball milling; powder metallurgy; high frequency induction sintering; precipitation kinetics and phase transformations; high-frequency induction sintering; environmental adsorbents; microstructure– mechanical properties relationships
(This special issue belongs to the Section Crystalline Metals and Alloys)
Functional Thin Films: Growth, Characterization, and Applications
edited by and Dominika Majchrzak
submission deadline 10 Apr 2026 | Viewed by 200 | Submission Open
Keywords: functional and functionalized thin films; thin film growth and fabrication; 2D materials and layered structures; thin film characterization techniques; modeling and simulations of thin films; surface modification and interface engineering; functional thin films for catalysis; electronics; optics; sensors; coatings; biotechnology; medicine and micromechanical applications
(This special issue belongs to the Section Inorganic Crystalline Materials)
Microstructural and Technological Aspects of Directed Energy Deposition
edited by and Alberto Santoni
submission deadline 10 Apr 2026 | Viewed by 122 | Submission Open
Keywords: laser powder directed energy deposition; metals and alloys; ceramics and metal matrix composites; microstructural features; wire arc additive manufacturing; mechanical properties; hierarchical structures; finite element simulations
(This special issue belongs to the Section Inorganic Crystalline Materials)
Recent Progress in Perovskite Materials for Solar Cells and Optoelectronic Devices
edited by Myeongkee Park
submission deadline 10 Apr 2026 | Viewed by 99 | Submission Open
Keywords: perovskite materials; solar cells; optoelectronic devices; optical characterization; electrochemical characterization; stability enhancement; device architecture; organic; halogen; and metal compositional engineering
(This special issue belongs to the Section Materials for Energy Applications)
Polymeric Materials for Sustainable Catalysis and Energy Applications
edited by Salvatore Impemba, , and
submission deadline 15 Apr 2026 | Viewed by 140 | Submission Open
Keywords: polymer; catalyst; biomass; energy; hydrogen; nanoparticles; electrocatalysis
(This special issue belongs to the Section Inorganic Crystalline Materials)
Optical Properties and Applications of 2D Materials
edited by José Guadalupe Murillo-Ramírez and
submission deadline 20 Apr 2026 | 1 articles | Viewed by 2491 | Submission Open
Keywords: monoatomic layers; graphene oxide; photonic materials; heterojunctions; thin films
(This special issue belongs to the Section Inorganic Crystalline Materials)
Advances in Nanoscale Materials for Electrocatalytic and Sensing Applications
edited by Ming Su
submission deadline 20 Apr 2026 | 1 articles | Viewed by 1174 | Submission Open
Keywords: nanoscale materials; synthesis and characterization; nanocrystals; nanocatalysts; electrocatalysis; electrocatalytic mechanisms; nanosensors; sensing applications
(This special issue belongs to the Section Materials for Energy Applications)
Advances in Processing, Simulation and Characterization of Alloys (2nd Edition)
edited by , , Fuyu Dong and
submission deadline 20 Apr 2026 | 1 articles | Viewed by 446 | Submission Open
Keywords: alloy design; process optimization; heat treatments; phase transformations; mechanical; anti-corrosion; soft magnetic and other properties; microstructural characterization; modeling and simulation; Finite Element Analysis (FEA)
(This special issue belongs to the Section Crystalline Metals and Alloys)
Electron Microscopy Characterization of Soft Matter Materials
edited by and
submission deadline 20 Apr 2026 | Viewed by 303 | Submission Open
Keywords: cryo-electron microscopy (cryo-em); low-dose electron microscopy  ; focused ion beam sem (fib-sem); tomography; beam-sensitive materials  ; nanostructure characterization  ; structure-property relationships  ; deep learning segmentation; image processing; 3D reconstruction
Research on Functional Nanomaterials
edited by Erick L. Ribeiro, Zhen Zhang, and Gabriel Adolfo Cabrera-Pasca
submission deadline 20 Apr 2026 | Viewed by 92 | Submission Open
Keywords: nanomaterial synthesis and characterization; nanomaterials for energy and electronics; biomedical nanomaterials; magnetic nanomaterials; nanocatalysis; advanced nanostructures and hybrid nanocomposites; nanoscale surface functionalization; computational modeling of nanomaterials; data-driven materials discovery; optimization algorithms
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Advances in Preparation, Characterization and Application of Hydroxyapatite-Based Materials
edited by Nestor Méndez-Lozano and
submission deadline 20 Apr 2026 | Viewed by 58 | Submission Open
Keywords: hydroxyapatite; synthesis; doping; crystallization process; nucleation mechanisms; crystal growth; crystal structure; morphology; biomaterials; dental applications
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Optoelectronic Materials: Properties and Applications
edited by
submission deadline 20 Apr 2026 | Viewed by 46 | Submission Open
Keywords: optoelectronic materials; light-emitting devices; organic semiconductors
(This special issue belongs to the Section Materials for Energy Applications)
State of the Art of Crystalline Metals and Alloys
edited by Roberto Martínez-Sánchez and
submission deadline 22 Apr 2026 | Viewed by 69 | Submission Open
Keywords: metals; alloys; solidification; grains; textures; dislocations; phase transformations; twinning; precipitation; martensite; X-ray diffraction; electron microscopy; casting; rolling; welding; additive manufacturing; mechanical properties
(This special issue belongs to the Section Crystalline Metals and Alloys)
Research and Applications of ZnO Thin Films
edited by , António F. da Cunha and
submission deadline 24 Apr 2026 | Viewed by 183 | Submission Open
Keywords: ZnO thin films; plasma-assisted deposition; magnetron sputtering; defect engineering; transparent conductive oxides; UV optoelectronics; flexible and wearable devices; energy harvesting; aerospace and environmental applications
(This special issue belongs to the Section Inorganic Crystalline Materials)
Innovations in Magnetic Composites: Synthesis to Application
edited by Izabella Crăciunescu
submission deadline 10 May 2026 | 3 articles | Viewed by 2308 | Submission Open
Keywords: magnetic nanomaterials; composites; hybrid nanostructures; magnetoresponsive systems; applications
Microstructure, Properties and Characterization of Aluminum Alloys submission deadline 10 May 2026 | 1 articles | Viewed by 549 | Submission Open
Keywords: aluminum alloys; microstructure evolution; mechanical properties; corrosion resistance; precipitation strengthening; advanced characterization; additive manufacturing; thermomechanical processing; phase transformation; structure– property relationships
(This special issue belongs to the Section Crystalline Metals and Alloys)
Computational Phase Stabilities and Phase Tailoring of Alternative and Sustainable Hard Magnetic Materials
edited by and Thorsten Klüner
submission deadline 10 May 2026 | Viewed by 83 | Submission Open
Keywords: hard magnetic materials; computational materials design; computational phase stability; sustainable magnets; rare-earth-free magnets; rare-earth-lean magnets; thermodynamic modeling; computational material discovery; materials informatics
(This special issue belongs to the Section Inorganic Crystalline Materials)
Advances in Electrocatalyst Materials for Sustainable Applications
edited by and César A. Zúñiga
submission deadline 10 May 2026 | Viewed by 61 | Submission Open
Keywords: crystals; carbon nanomaterials; electrocatalysts; sustainability; circular; energy conversion devices; hydrogen economy; renewable sources
(This special issue belongs to the Section Materials for Energy Applications)
Properties and Applications of 3D Printed Titanium Alloys
edited by
submission deadline 10 May 2026 | Viewed by 56 | Submission Open
Keywords: additive manufacturing; 3D printing; titanium and titanium alloys; performance; mechanical properties; corrosion resistance; fatigue behavior; surface characteristics; application; biomaterials
(This special issue belongs to the Section Crystalline Metals and Alloys)
Metallurgy-Processing-Properties Relationship of Metallic Materials
edited by
submission deadline 15 May 2026 | 3 articles | Viewed by 2141 | Submission Open
Keywords: metallurgy; phase transformation; phase diagram; material processing; alloy development; mechanical properties; microstructural analysis; simulation; characterization techniques
(This special issue belongs to the Section Crystalline Metals and Alloys)
Advances in New Functional Biomaterials for Medical Applications, Second Edition submission deadline 20 May 2026 | 2 articles | Viewed by 4383 | Submission Open
Keywords: new biomaterials; characterization; metallic biomaterials; bio interactive; resorbable biomaterials; controlled reactions
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Advances in High-Performance Alloys
edited by Huihui Zhi, Cheng Wen and
submission deadline 20 May 2026 | 4 articles | Viewed by 2167 | Submission Open
Keywords: high-entropy alloys; steels and iron alloys; magnesium alloys; aluminum alloys; copper alloys; titanium alloys; mechanical properties; corrosion resistance properties; hydrogen embrittlement; characterization; machine learning
(This special issue belongs to the Section Crystalline Metals and Alloys)
Research on Electrolytes and Energy Storage Materials (2nd Edition)
edited by and Mengjie Chen
submission deadline 20 May 2026 | 1 articles | Viewed by 530 | Submission Open
Keywords: electrolytes; energy storage materials; batteries; supercapacitors; lithium-ion batteries; solid-state electrolytes; charge– discharge mechanisms; green technology; sustainable materials; next-generation energy storage
(This special issue belongs to the Section Materials for Energy Applications)
Crystaline TiO2 Nanotubes: From Production, Modification, to Innovative Applications
edited by
submission deadline 20 May 2026 | Viewed by 245 | Submission Open
Keywords: crystallization of TiO2 nanotubes; TiO2 nanotubes biomedical applications; TiO2 nanotubes in dye-sensitized solar cells; TiO2 nanotubes drug delivery systems; TiO2 nanotubes antibacterial agents; TiO2 nanotubes self-cleaning substrates
Advances in the Growth and Application of Nitride Crystals
edited by
submission deadline 20 May 2026 | Viewed by 124 | Submission Open
Keywords: gallium nitride; aluminum nitride; boron nitride; crystal growth; substrate processing; hydride vapor phase epitaxy; flux method; high-pressure ammonothermal method; physical vapor transport; chemical mechanical polishing
(This special issue belongs to the Section Inorganic Crystalline Materials)
Advances in Electrocatalyst Materials
edited by and
submission deadline 20 May 2026 | Viewed by 109 | Submission Open
Keywords: electrocatalysis; nanostructured Materials; metal-organic frameworks (MOFs); machine learning potentials (MLPs); density functional theory (DFT); microkinetic modelling; reaction mechanisms; sustainable energy conversion
(This special issue belongs to the Section Materials for Energy Applications)
Recent Advances in the Development and Application of Clay-Based Hybrid and Composite Materials submission deadline 20 May 2026 | Viewed by 90 | Submission Open
Keywords: clay functionalization and intercalation chemistry; structural and morphological characterization; organo-clay nanocomposites; chemical sensors and BioSensors; materials for 3D printing
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Advances and Expansion of Epitaxial Nitride-Based Materials
edited by , Robert A. Makin and
submission deadline 20 May 2026 | Viewed by 77 | Submission Open
Keywords: epitaxy; nitride; heterostructure; doping; electrical transport; magnetism; optical properties; machine learning; artificial intelligence
(This special issue belongs to the Section Inorganic Crystalline Materials)
Electrochemical Preparation of Magnetic Materials
edited by Milica Spasojević Savković and
submission deadline 20 May 2026 | Viewed by 35 | Submission Open
Keywords: electrodeposition; magnetization; electric properties; energy storage; electrochemistry
(This special issue belongs to the Section Materials for Energy Applications)
Advanced Catalytic Materials in Energy and Environment
edited by Wanliang Yang
submission deadline 20 May 2026 | Viewed by 35 | Submission Open
Keywords: crystalline catalysts; crystal facet; defect engineering; in situ XRD; CO2  reduction; water splitting; photocatalysis; electrocatalysis; perovskite; MOF
(This special issue belongs to the Section Materials for Energy Applications)
Synthesis, Properties and Applications of Carbon Nanotubes
edited by Magdalena Kadlecikova
submission deadline 20 May 2026 | Viewed by 21 | Submission Open
Keywords: carbon nanotubes (CNTs); nanocomposites; metal catalyst; minerals; mine waste; Raman spectroscopy
(This special issue belongs to the Section Inorganic Crystalline Materials)
Transition Metal Complexes with Heterocyclic Ligands: Structural Insights, Biological Potential, and Computational Perspectives submission deadline 31 May 2026 | 1 articles | Viewed by 535 | Submission Open
Keywords: antimicrobial activity; antiproliferative activity; drug development; DFT (density functional theory); in vitro studies; molecular docking; NMR spectroscopy; transition metal complexes; X-ray diffraction (XRD); heterocyclic scaffolds
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Advanced Research in Lithium-Ion Battery Materials
edited by
submission deadline 31 May 2026 | Viewed by 124 | Submission Open
Keywords: lithium metal anodes; electrolyte design solid-state batteries; cathode stabilization; novel characterization methodologies
(This special issue belongs to the Section Materials for Energy Applications)
Advances in Scintillators: Luminescence Properties and Applications submission deadline 11 Jun 2026 | Viewed by 114 | Submission Open
Keywords: scintillator crystals; inorganic scintillators; co-doped scintillators; mixed scintillators; hybrid scintillator materials (inorganic/organic); medical imaging; nuclear imaging detectors
Properties of Transition Metals and Their Compounds at Extreme Conditions (2nd Edition) submission deadline 15 Jun 2026 | 6 articles | Viewed by 15641 | Submission Open
Keywords: extreme conditions research; phase transitions; structural; electronic and magnetic properties; textural evolution; phase diagrams modelling and characterisation; new materials; equation of state; melting curves; symmetry-breaking
(This special issue belongs to the Section Crystalline Metals and Alloys)
Fatigue and Fracture of Crystalline Metal Structures
edited by Xiangnan Pan and
submission deadline 20 Jun 2026 | 9 articles | Viewed by 14431 | Submission Open
Keywords: fatigue and fracture; fatigue regimes; engineering vibration; elastic and plastic waves; metals and alloys; additive manufacturing; microstructure modeling; microstructure characterization; civil engineering; aerospace structure
(This special issue belongs to the Section Crystalline Metals and Alloys)
Advances and Perspectives in Noble Metal Nanoparticles submission deadline 20 Jun 2026 | 2 articles | Viewed by 1439 | Submission Open
Keywords: nanomaterials; nanoparticles; noble metal; AuNPs; AgNPs; PtNPs; platinum group metals; sensing; catalysis; nanomedicine; bioactivity
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Solid-State Batteries: Materials Design and Optimization
edited by Sijie Liu and
submission deadline 20 Jun 2026 | Viewed by 85 | Submission Open
Keywords: solid-state batteries; crystalline materials; electrode materials; solid electrolytes; interface engineering; cell design; energy storage; lithium-ion batteries; thermal stability; ionic conductivity
(This special issue belongs to the Section Materials for Energy Applications)
Preparation and Performance Research of Piezoelectric Ceramics
edited by and Yongcheng Zhang
submission deadline 20 Jun 2026 | Viewed by 60 | Submission Open
Keywords: piezoelectric ceramics; ferroelectric materials; lead-free piezoelectrics; material synthesis; sintering; structure-property relationships; electromechanical properties; actuators and sensors
(This special issue belongs to the Section Polycrystalline Ceramics)
Thin Film Materials for Sensors
edited by Zhihui Liu, , Xue Qi and
submission deadline 20 Jun 2026 | Viewed by 24 | Submission Open
Keywords: thin film; sensors; flexible temperature; temperature measurement; temperature-sensitive materials
(This special issue belongs to the Section Inorganic Crystalline Materials)
Physical and Chemical Nature of Cemented Carbides submission deadline 20 Jun 2026 | Viewed by 7 | Submission Open
Keywords: high-entropy alloys (HEAs); cemented carbides; mechanical milling; sintering techniques (SPS/HIP); microstructural characterization
(This special issue belongs to the Section Crystalline Metals and Alloys)
Recent Research on Piezoelectric Ceramics
edited by and Nengneng Luo
submission deadline 29 Jun 2026 | Viewed by 56 | Submission Open
Keywords: piezoelectric ceramics; manufacture technologies; piezoelectricity; defect; grain
(This special issue belongs to the Section Polycrystalline Ceramics)
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