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 Nanomaterials and Nanocomposites for Catalytic Applications
edited by
submission deadline 20 Aug 2026 | 4 articles | Viewed by 8465 | Submission Open
Keywords: nanomaterials; nanocomposites; nanocatalysts; catalytic performance; pollutant degradation; energy
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Crystalline Materials for Energy Conversion Applications in Solar Cells
edited by Eros Radicchi and Francesca Lo Presti
submission deadline 20 Aug 2026 | 4 articles | Viewed by 7966 | Submission Open
Keywords: solar cells; up-conversion; down-conversion; down-shifting; cystalline materials
(This special issue belongs to the Section Materials for Energy Applications)
Recent Advances in Scintillator Materials
edited by
submission deadline 20 Aug 2026 | 1 articles | Viewed by 2014 | Submission Open
Keywords: scintillators; crystals; films; ceramics; nanopowders; melt growth; liquid-phase epitaxy; and solid-state reactions; luminescence; energy transfer processes; defects; dopants
(This special issue belongs to the Section Inorganic Crystalline Materials)
Crystallography of Enzymes (2nd Edition)
edited by and
submission deadline 20 Aug 2026 | 2 articles | Viewed by 1589 | Submission Open
Keywords: enzyme structure and function; X-ray and serial crystallography; de novo enzyme design; ancestral reconstruction; protein engineering; catalytic mechanism; structural dynamics; substrate and inhibitor interactions; computational modeling
(This special issue belongs to the Section Biomolecular Crystals)
Research on Liquid Crystal Materials and Optical Devices submission deadline 20 Aug 2026 | Viewed by 524 | Submission Open
Keywords: columnar liquid crystals; self-organizing; optical devices; planar and homeotropic alignment; organic electronics; semiconducting nanoparticles; solar cells; oleds; transistors; displays
(This special issue belongs to the Section Liquid Crystals)
Crystallization and Precipitation in Life-Science, (Bio)polymer and Recycling Industries
edited by , and Vico Tenberg
submission deadline 20 Aug 2026 | 1 articles | Viewed by 439 | Submission Open
Keywords: phase equilibria; recycling processes; circular economy; biopolymer processing and valorization; sustainable process engineering; innovative crystallization and precipitation process concepts; industrial applications
(This special issue belongs to the Section Industrial Crystallization)
Perovskite Materials: Structure, Properties and Applications
edited by Xiangqian Shen, Hua Zhou and
submission deadline 20 Aug 2026 | 1 articles | Viewed by 403 | Submission Open
Keywords: perovskite photoelectric devices; material engineering; scalable manufacturing; clean energy; environmental sustainability
(This special issue belongs to the Section Materials for Energy Applications)
Recent Advances in Graphene and Other Two-Dimensional Materials (2nd Edition) submission deadline 20 Aug 2026 | Viewed by 363 | Submission Open
Keywords: two-dimensional materials; two-dimensional material based membranes; graphene; graphene oxide; transition metal dichalcogenides (TMDCs); graphene-based composites; two-dimensional advanced devices and applications; functionalization of graphene; characterization techniques: electrical; electronic; optical; and mechanical properties
(This special issue belongs to the Section Inorganic Crystalline Materials)
Graphene-Based Nanocomposites
edited by and Tien-Li Chang
submission deadline 20 Aug 2026 | Viewed by 229 | Submission Open
Keywords: graphene nanocomposites; 2D materials; functionalization and defect engineering; laser/photonic processing; additive manufacturing; flexible/wearable sensors; energy storage and conversion; electro/photocatalysis; in situ/operando characterization; machine learning guided materials design
(This special issue belongs to the Section Polycrystalline Ceramics)
Crystal Structures and Electronic Properties Under High Pressure
edited by Zhiying Guo
submission deadline 20 Aug 2026 | Viewed by 112 | Submission Open
Keywords: structural phase transitions; charge density wave; lattice modulations; crystal structure prediction; high pressure
(This special issue belongs to the Section Inorganic Crystalline Materials)
Machine Learning for Material and Process Optimization in Additive Manufacturing submission deadline 30 Aug 2026 | 1 articles | Viewed by 1749 | Submission Open
Keywords: machine learning; additive manufacturing; process optimization; material design; artificial intelligence; material development; digital twins; process control; data-driven modeling; advanced manufacturing; sustainable manufacturing
Microstructure and Mechanical Behavior of Advanced High Strength Steels
edited by Mattia Franceschi
submission deadline 30 Aug 2026 | 2 articles | Viewed by 1453 | Submission Open
Keywords: AHSS; quench and partitioning; carbide free bainite; medium manganese steel; TRIP; austenite; bainitic transformation; tensile properties; fatigue; heat treatment
Modern Gem Crystals: Synthesis, Characterization, Genesis and Intelligent Analysis
edited by , and
submission deadline 31 Aug 2026 | 4 articles | Viewed by 3538 | Submission Open
Keywords: gemology; mineralogy; geographic-origin determination; spectroscopy; synthetic gemstones; treatment detection; artificial intelligence (AI) in gemology; digitalization; non-destructive testing
(This special issue belongs to the Section Mineralogical Crystallography and Biomineralization)
Microstructure and Properties of Steel Materials
edited by , , Qizhe Ye and
submission deadline 31 Aug 2026 | 1 articles | Viewed by 1049 | Submission Open
Keywords: steel; microstructure; phase transformation; mechanical properties; corrosion; hydrogen embrittlement; materials processing; additive manufacturing; machine learning
(This special issue belongs to the Section Crystalline Metals and Alloys)
Functional Nanomaterials for Electrochemical Sensing and Energy Storage submission deadline 31 Aug 2026 | 2 articles | Viewed by 788 | Submission Open
Keywords: graphene-based materials; layered double hydroxide (LDH); conductive polymers; hybrid nanocomposites; electrochemical sensing; energy storage
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Synthesis and Crystal Structures of Novel Solid-State Materials and Their Applications
edited by and Patricia Barahona
submission deadline 10 Sep 2026 | 1 articles | Viewed by 960 | Submission Open
Keywords: solid-state synthesis; crystalline materials; structural characterization; structure– property relationships; application of solid-state materials
(This special issue belongs to the Section Inorganic Crystalline Materials)
Perovskites: Crystal Structure, Properties and Applications submission deadline 10 Sep 2026 | 1 articles | Viewed by 878 | Submission Open
Keywords: perovskite materials; crystal structure; material characterization; energy applications; nanotechnology; computational modeling
(This special issue belongs to the Section Materials for Energy Applications)
Advances in Crystalline Nanocellulose and Its Derivatives for Sustainable Functional Materials
edited by Carlos Molina-Ramírez and
submission deadline 10 Sep 2026 | Viewed by 340 | Submission Open
Keywords: crystalline nanocellulose; cellulose nanocrystals (CNCs); cellulose nanofibrils (CNFs); circular economy; sustainable materials; nanocellulose applications; bio-based composites; structure– property relationships; biodegradable materials; functional nanomaterials
(This special issue belongs to the Section Organic Crystalline Materials)
Advances in Self-Assembled Luminescent Materials
edited by Gong Zhang, and Jianrong Qiu
submission deadline 10 Sep 2026 | Viewed by 307 | Submission Open
Keywords: supramolecular polymers; supramolecular assembly; circularly polarized luminescence; chiral self-assembly; crystal structure; optoelectronic properties; aggregation-induced emission
Microstructure and Characterization of Crystalline Materials submission deadline 20 Sep 2026 | 6 articles | Viewed by 7149 | 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)
Crystallization Processes and Simulation Calculations, Fourth Edition
edited by , and Mingxuan Li
submission deadline 20 Sep 2026 | 2 articles | Viewed by 2681 | Submission Open
Keywords: process analytical technology; process intensification; AI-enhanced crystallization; machine learning; multi-objective optimization; molecular dynamics simulation; hydrodynamics simulation
(This special issue belongs to the Section Industrial Crystallization)
Heterocyclic Compounds in Drug Discovery: Synthesis, X-Ray Crystal Structures, Applications and Computational Approaches submission deadline 20 Sep 2026 | 2 articles | Viewed by 1743 | Submission Open
Keywords: heterocyclic compounds; synthetic methodologies; structural characterization; X-ray crystallography studies; biological properties; computational chemistry
(This special issue belongs to the Section Biomolecular Crystals)
Advances in Photocatalytic Technology and Materials submission deadline 20 Sep 2026 | 1 articles | Viewed by 1433 | 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)
Emerging Nanostructured Powders: Synthesis and Applications submission deadline 20 Sep 2026 | 1 articles | Viewed by 900 | Submission Open
Keywords: nanostructured powders; nanospheres; oxide metal; high-entropy alloys; MXenes; metal– organic frameworks (MOFs); advanced ceramics; energy storage; heterogeneous catalysis; additive manufacturing; functional nanomaterials
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Simulation on Casting and Solidification Process of Crystalline Metals and Alloys submission deadline 20 Sep 2026 | 1 articles | Viewed by 879 | Submission Open
Keywords: casting simulation; solidification modeling; crystalline metals and alloys; microstructure evolution; grain structure prediction; thermal and fluid flow analysis; phase transformation; numerical methods in metallurgy; defect prediction in casting
(This special issue belongs to the Section Crystalline Metals and Alloys)
Advances in Pharmaceutical Crystals: Numerical Simulations and Experimental Investigations submission deadline 20 Sep 2026 | 1 articles | Viewed by 648 | Submission Open
Keywords: pharmaceutical crystals; polymorphism; cocrystals; crystallization process; molecular modeling; process simulation; in situ characterization; crystal engineering; solid-form screening; computational pharmaceutics
(This special issue belongs to the Section Industrial Crystallization)
Advanced Characterization and Crystal Engineering of Coordination Polymers and Hybrid Frameworks
edited by Nomampondo Penelope Magwa and Gareth Mostyn Watkins
submission deadline 20 Sep 2026 | Viewed by 469 | Submission Open
Keywords: coordination compounds; MOFs; hybrid crystalline materials; crystal engineering; X-ray diffraction; spectroscopy; thermal analysis; porosity and BET; computational chemistry (DFT/ML); catalysis; gas separations; bioinorganic materials
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Advances in Electrochemical Energy Storage Materials: From Fundamental Mechanisms to Practical Applications
edited by Weiqiang Lv and
submission deadline 20 Sep 2026 | Viewed by 371 | 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)
Advanced Synthesis of Thin Films for Photonic Applications
edited by , Marian Zamfirescu and
submission deadline 20 Sep 2026 | Viewed by 226 | Submission Open
Keywords: optical devices; thin film; advanced functional materials; strain mediated functionalities; tailored optical and electrical properties
(This special issue belongs to the Section Inorganic Crystalline Materials)
New Horizons in Emerging Electroceramics: From Fundamentals to Next-Generation Devices
edited by and Alexandre Zirpoli Simões
submission deadline 20 Sep 2026 | Viewed by 182 | Submission Open
Keywords: electroceramics; crystal structure and defects; structure– property relationships; thin films and multilayers; energy harvesting and storage; sensors and actuators; power electronics; in situ/operando characterization; microstructure engineering; functional devices
(This special issue belongs to the Section Polycrystalline Ceramics)
Advanced Functional Ceramics for Energy, Dielectric and Electromagnetic Applications
edited by and Ge Wang
submission deadline 20 Sep 2026 | Viewed by 127 | Submission Open
Keywords: energy storage ceramics; energy harvesting ceramics; dielectric ceramics; ferroelectric/multiferroic ceramics; piezoelectric ceramics; solid-state electrolytes; electromagnetic shielding and absorption; wireless communication applications; microstructural engineering; machine learning-assisted materials design
(This special issue belongs to the Section Polycrystalline Ceramics)
Synthesis and Applications of Crystalline Nanoporous Materials submission deadline 22 Sep 2026 | 1 articles | Viewed by 386 | Submission Open
Keywords: nanoporous materials; metal-oxide semiconductors; dealloying processes; top-down synthesis; bottom-up synthesis; amorphous metallic alloys; framework; electrochemical properties; sensor integration; metal– oxide interaction
(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 30 Sep 2026 | 1 articles | Viewed by 1165 | 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)
Crystal Scintillator as Radiation Detector submission deadline 30 Sep 2026 | Viewed by 204 | Submission Open
Keywords: crystal scintillator; radiation detectors; crystal growth and characterization; scintillation properties; low-background detectors; particle and astroparticle physics; medical and imaging application
(This special issue belongs to the Section Inorganic Crystalline Materials)
Polymorphism and Phase Transitions in Crystal Materials submission deadline 10 Oct 2026 | 4 articles | Viewed by 7319 | Submission Open
Keywords: polymorph; polymorphism; phase transition; form change; crystal; cocrystal; solid; pharmaceutical; solid state
(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 Oct 2026 | 2 articles | Viewed by 1589 | 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)
Recent Progress in Perovskite Materials for Solar Cells and Optoelectronic Devices
edited by Myeongkee Park
submission deadline 10 Oct 2026 | 1 articles | Viewed by 733 | 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)
Grain Boundary Engineering in Metallic Materials
edited by Xinren Chen and
submission deadline 10 Oct 2026 | Viewed by 278 | Submission Open
Keywords: 4DSTEM tomography; atom probe tomography; 3D diffraction; grain boundary engineering
(This special issue belongs to the Section Crystalline Metals and Alloys)
From Processing to Performance: Microstructure Engineering in Advanced Metallic Alloys submission deadline 10 Oct 2026 | Viewed by 200 | Submission Open
Keywords: alloy design; thermomechanical processing; phase transformations; deformation mechanisms; structure– property relationships; high-performance alloys; mechanical properties
(This special issue belongs to the Section Crystalline Metals and Alloys)
Optical Properties and Applications of 2D Materials
edited by José Guadalupe Murillo-Ramírez and
submission deadline 20 Oct 2026 | 1 articles | Viewed by 3211 | Submission Open
Keywords: monoatomic layers; graphene oxide; photonic materials; heterojunctions; thin films
(This special issue belongs to the Section Inorganic Crystalline Materials)
Microstructure and Mechanical Behaviour of Structural Materials: 3rd Edition
edited by Saif Haider Kayani and Byung-Joo Kim
submission deadline 20 Oct 2026 | 4 articles | Viewed by 1953 | 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)
Novel Dental Materials for Caries Prevention
edited by
submission deadline 20 Oct 2026 | 3 articles | Viewed by 1491 | Submission Open
Keywords: bioactive materials; dental composites; smart materials; nanotechnology
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Advanced Research on Microstructure Evolution in Crystalline Materials
edited by Andreas Prahs and
submission deadline 20 Oct 2026 | 2 articles | Viewed by 1418 | Submission Open
Keywords: microstructure evolution; theoretical modeling; computational simulation; nucleation mechanisms; morphological evolution  
Nanocrystalline Materials Processing and Characterization submission deadline 20 Oct 2026 | 2 articles | Viewed by 1186 | Submission Open
Keywords: nanomaterials; nanostructures; advanced materials; additive manufacturing; mechanical alloying; spark plasma sintering; functional materials; biomaterials; annealing; simulation and modelling
Nanostructured Functional Materials: Structure, Properties, and Emerging Applications submission deadline 20 Oct 2026 | 1 articles | Viewed by 1144 | Submission Open
Keywords: nanostructured materials; structure– property relationships; advanced functional materials; biomedical and environmental applications; materials for water treatment and energy
Research and Applications of ZnO Thin Films
edited by , António F. da Cunha and
submission deadline 20 Oct 2026 | 1 articles | Viewed by 1009 | 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)
Applications of Additive Manufacturing and Numerical Simulation in High-Performance Metallic Materials
edited by Yunwei Gui and
submission deadline 20 Oct 2026 | 1 articles | Viewed by 865 | Submission Open
Keywords: additive manufacturing; numerical simulation; high-performance metals; multi-physics modeling; experimental validation; process-microstructure-property relationships; topology optimization; residual stress; digital twin; powder bed fusion
(This special issue belongs to the Section Crystalline Metals and Alloys)
Research on Complex Oxide Nanomaterials
edited by and Irina D. Stambolova
submission deadline 20 Oct 2026 | 1 articles | Viewed by 716 | Submission Open
Keywords: complex oxide; nanomaterials; composites; synthesis; physicochemical characterization; photocatalysis; application
(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 20 Oct 2026 | 1 articles | Viewed by 589 | 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)
Structure-Based Drug Design and New Methodologies submission deadline 20 Oct 2026 | 1 articles | Viewed by 506 | Submission Open
Keywords: new drugs; noncovalent interactions; molecular recognition; supramolecular chemistry; PROTAC
(This special issue belongs to the Section Biomolecular Crystals)
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