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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Advances in Functional Materials for Lithium Secondary Battery System: Challenge, Opportunities, Solutions and Applications
edited by Jingzheng Weng, Minquan Tian and
submission deadline 28 Feb 2026 | Viewed by 194 | Submission Open
Keywords: functional materials; crystalline materials; polymer conductors; energy materials; electrode materials; solid electrolytes; high-voltage functional materials; lithium battery; next-generation post-lithium battery systems
(This special issue belongs to the Section Materials for Energy Applications)
Microstructure and Mechanical Behavior of Advanced High Strength Steels
edited by Mattia Franceschi
submission deadline 28 Feb 2026 | Viewed by 177 | Submission Open
Keywords: AHSS; quench and partitioning; carbide free bainite; medium manganese steel; TRIP; austenite; bainitic transformation; tensile properties; fatigue; heat treatment
Microstructure Characterization and Design of Alloys, 2nd Edition
edited by , Arnoldo Bedolla-Jacuiende, Jacinto Cortéz Pérez and
submission deadline 28 Feb 2026 | Viewed by 127 | Submission Open
Keywords: microstructural analysis; mechanical properties; tribological behavior of ferrous and non-ferrous alloys
(This special issue belongs to the Section Crystalline Metals and Alloys)
Synthesis, Crystal Structures and Hirshfeld Surface Analysis of Coordination Compounds (3rd Edition) submission deadline 10 Mar 2026 | 4 articles | Viewed by 6937 | Submission Open
Keywords: coordination complexes  ; synthesis  ; crystal and molecular structure  ; hirschfeld surface analysis; non-covalent interactions
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Recent Advances in Microstructure and Properties of Metals and Alloys (2nd Edition) submission deadline 10 Mar 2026 | 1 articles | Viewed by 572 | Submission Open
Keywords: microstructure characterization; phase transformations; material properties; mechanical properties; corrosion resistance; manufacturing technology
Advanced Research on Microstructure Evolution in Crystalline Materials
edited by Andreas Prahs and
submission deadline 10 Mar 2026 | Viewed by 181 | Submission Open
Keywords: microstructure evolution; theoretical modeling; computational simulation; nucleation mechanisms; morphological evolution  
Innovations in Catalytic Materials and Advanced Crystal Engineering
edited by Zhi Gao and
submission deadline 10 Mar 2026 | Viewed by 151 | Submission Open
Keywords: catalytic materials; advanced crystal engineering; crystal structure design; catalytic performance; sustainable technology innovation
(This special issue belongs to the Section Crystal Engineering)
Processing–Structure–Property Relationships in Next-Generation Titanium Alloys
edited by Maria Ntsoaki Mathabathe and Amogelang Sylvester Bolokang
submission deadline 10 Mar 2026 | Viewed by 139 | Submission Open
Keywords: titanium alloys; microstructural evolution; phase transformations; metastable β -titanium alloys; high-entropy Ti-based alloys; additive manufacturing; powder metallurgy; mechanical properties; corrosion resistance; fatigue and creep behaviour; biomedical applications; hydrogen storage; advanced characterization; computational thermodynamics; sustainable processing
(This special issue belongs to the Section Crystalline Metals and Alloys)
Ceramic Matrix Composites for High Temperature Applications
edited by Dustin Gilmer and
submission deadline 10 Mar 2026 | Viewed by 124 | Submission Open
Keywords: ceramic matrix composite; high temperature; oxidation; advanced manufacturing; compositionally complex ceramics; ultra-high temperature ceramics; fiber reinforced composite
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Non-Fourier Thermal Wave Crystals: Fundamentals, Modeling, and Applications
edited by Jesus Manzanares-Martinez
submission deadline 10 Mar 2026 | Viewed by 83 | Submission Open
Keywords: thermal wave crystals; hyperbolic heat conduction; Bloch/Floquet analysis; thermal band gaps; nanoscale heat transfer; phonon hydrodynamics; layered composites; wave-based thermal management
(This special issue belongs to the Section Inorganic Crystalline Materials)
The Cutting Edge of Energy Materials Research Aimed at Practical Application
edited by
submission deadline 15 Mar 2026 | Viewed by 137 | Submission Open
Keywords: perovskite material; battery material (secondary battery; super capacitor; etc.); wide-bandgap semiconductor; thermoelectric materials (solid and liquid); characterization
(This special issue belongs to the Section Materials for Energy Applications)
Structure-Based Drug Design and New Methodologies submission deadline 15 Mar 2026 | Viewed by 103 | Submission Open
Keywords: new drugs; noncovalent interactions; molecular recognition; supramolecular chemistry; PROTAC
(This special issue belongs to the Section Biomolecular Crystals)
Welding and Joining of Metallic Materials: Microstructure and Mechanical Properties, 2nd Edition
edited by and Reza Beygi
submission deadline 20 Mar 2026 | 6 articles | Viewed by 9533 | Submission Open
Keywords: friction stir welding; laser welding; electron beam welding; hybrid welding; adhesive bonding; welding-based additive manufacturing (WAAM); gas metal arc welding (GMAW); gas tungsten arc welding (GTAW); shielded metal arc welding (SMAW); welding parameters and optimization; microstructure; post-weld heat treatment; grain structure; phase transformations; precipitates; defects; residual stresses; mechanical properties; non-destructive testing; fatigue analysis; fracture mechanics; weld integrity; reliability assessments
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Microstructure and Characterization of Crystalline Materials submission deadline 20 Mar 2026 | 5 articles | Viewed by 3144 | Submission Open
Keywords: metallic and composite materials; casting; AM; plastic working; SPD; microstructure evolution and characterization; plasticity; mechanical properties; destructive and nondestructive testing; computer simulations; expert systems
(This special issue belongs to the Section Crystal Engineering)
Optical Properties of Crystalline Semiconductors and Nanomaterials
edited by
submission deadline 20 Mar 2026 | 2 articles | Viewed by 2789 | Submission Open
Keywords: semiconductors; optoelectronics; quantum dots; nanoparticles; nanostructures; quantum materials; photoluminescence; photoelectric
(This special issue belongs to the Section Inorganic Crystalline Materials)
Advances in Thin-Film Materials and Their Applications
edited by and Abdessamad Aouni
submission deadline 20 Mar 2026 | 3 articles | Viewed by 2725 | Submission Open
Keywords: thin-film materials; coatings; synthesis and growth; interfacial phenomena
(This special issue belongs to the Section Inorganic Crystalline Materials)
Advances in Wide Bandgap Semiconductor Materials
edited by Sanjie Liu, Xinhe Zheng, and
submission deadline 20 Mar 2026 | Viewed by 150 | Submission Open
Keywords: wide-bandgap semiconductor; crystal growth; MBE; CVD/MOCVD; HVPE; optoelectronics; power electronics; LED; UV; nanostructures; doping; defects; electron mobility; thermal conductivity
(This special issue belongs to the Section Materials for Energy Applications)
Advances in Electrochemical Energy Storage Materials: From Fundamental Mechanisms to Practical Applications
edited by Weiqiang Lv and
submission deadline 20 Mar 2026 | Viewed by 137 | Submission Open
Keywords: electrochemical energy storage; advanced materials; battery; catalysis; in situ characterization; interfacial chemistry; nanomaterials; solid-state electrolytes; mechanism elucidation; device engineering
(This special issue belongs to the Section Materials for Energy Applications)
Research on Complex Oxide Nanomaterials
edited by and Irina D. Stambolova
submission deadline 20 Mar 2026 | Viewed by 117 | Submission Open
Keywords: complex oxide; nanomaterials; composites; synthesis; physicochemical characterization; photocatalysis; application
(This special issue belongs to the Section Materials for Energy Applications)
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 54 | 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 338 | Submission Open
Keywords: nanomaterials; nanostructures; advanced materials; additive manufacturing; mechanical alloying; spark plasma sintering; functional materials; biomaterials; annealing; simulation and modelling
Polymorphism and Phase Transitions in Crystal Materials submission deadline 31 Mar 2026 | 3 articles | Viewed by 3049 | 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 889 | 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 240 | 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 210 | 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 152 | 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 200 | 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 166 | 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 103 | 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 71 | 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 134 | 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 2309 | 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 1027 | 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 345 | 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 268 | 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 62 | 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 53 | 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 33 | 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 53 | 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 157 | 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 2076 | 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 74 | 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 59 | 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 44 | 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 27 | 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 1962 | 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 4108 | 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 the Growth and Application of Nitride Crystals
edited by
submission deadline 20 May 2026 | Viewed by 103 | 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 63 | 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 30 | 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)
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