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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Crystallization and Purification
edited by Kangli Li, and Keke Zhang
submission deadline 20 Dec 2025 | 5 articles | Viewed by 20591 | Submission Open
Keywords: crystallization technology; separation and purification; polymorph regulation; crystal habit
(This special issue belongs to the Section Industrial Crystallization)
Advanced Materials for Applications in Water Splitting
edited by Zhiyi Pan
submission deadline 20 Dec 2025 | 4 articles | Viewed by 7935 | Submission Open
Keywords: hydrogen energy; advanced electrocatalyst; water splitting; material design; structural characterization; simulated calculation; structure– activity relationship; mechanism
(This special issue belongs to the Section Materials for Energy Applications)
The Synthesis and Prospects of Magnetic Materials
edited by Jiayi He, Xuefeng Liao and Jiasheng Zhang
submission deadline 20 Dec 2025 | 3 articles | Viewed by 5204 | Submission Open
Keywords: magnetism; magnetic material; magnetic device; micromagnetic simulation; electromagnetic simulation; machine learning
(This special issue belongs to the Section Crystalline Metals and Alloys)
Recent Advances in Metal-Organic Frameworks: Synthesis, Characterization and Application
edited by Sumei Li
submission deadline 20 Dec 2025 | 2 articles | Viewed by 4472 | Submission Open
Keywords: metal organic framework; CO2 capture; adsorption; catalysis; sample preparation; sensors
(This special issue belongs to the Section Organic Crystalline Materials)
Functional Acoustic Metamaterials
edited by
submission deadline 20 Dec 2025 | 1 articles | Viewed by 1610 | Submission Open
Keywords: anisotropy; acoustic(s); metamaterial; metasurface; cloak; stealth; supersonic(s); ultrasonic(s); off-diagonal element
Growth and Properties of Photovoltaic Materials
edited by Mahmoud H. Hammouri and
submission deadline 20 Dec 2025 | 1 articles | Viewed by 1361 | Submission Open
Keywords: photovoltaic materials; solar energy; crystal growth; semiconductor properties; energy conversion
(This special issue belongs to the Section Materials for Energy Applications)
Nanoelectronics and Bioelectronics submission deadline 20 Dec 2025 | 1 articles | Viewed by 1346 | Submission Open
Keywords: nano-biotechnology; nanoelectronics; nanofabrication; crystalline materials; biosensors; nanomedicine; nanotechnology; functional materials; materials synthesis; wearable sensors; medical diagnostics
Research Progress on Thermoelectric Materials
edited by and
submission deadline 20 Dec 2025 | 1 articles | Viewed by 815 | Submission Open
Keywords: thermoelectric material  ; thermoelectric efficiency; X-ray diffraction; electrical conductivity  ; Seebeck coefficient  ; thermal conductivity  ; ZT value; band gap; phonon engineering; microstructure  ; sustainable materials  ; energy harvesting
New Insights in Electro- and Photo-Catalytic Performance of Biomimetics Composites submission deadline 20 Dec 2025 | Viewed by 537 | Submission Open
Keywords: photoredox; wastewater treatment; metal– organic framework; electrochemical water splitting; hydrogen production; photocatalytic degradation; electrodes development; biomimetic composite; energy storage; self-cleaning materials
(This special issue belongs to the Section Organic Crystalline Materials)
Advanced Research in Biomineralization submission deadline 20 Dec 2025 | Viewed by 218 | Submission Open
Keywords: pathological mineralization; spontaneous precipitations; kinetics of precipitation; additives; biomineralization; crystallization; in vivo/in vitro microbiological studies; nanomaterials
(This special issue belongs to the Section Biomolecular Crystals)
Structure and Properties of Macrocycle-Based Molecular (Co-)Crystals
edited by Bin Li, , Zhongwu Wang and Yiliang Wang
submission deadline 20 Dec 2025 | Viewed by 207 | Submission Open
Keywords: macrocycle crystals; macrocycle co-crystals; room temperature phosphorescence; thermally activated delay fluorescence  ; circularly polarized luminescence; semiconductor; stimuli responsiveness; adsorption/separation; optoelectronic materials
Advances in Functional Materials for Biomedical Applications
edited by
submission deadline 20 Dec 2025 | Viewed by 162 | Submission Open
Keywords: biocompatible materials; crystalline materials; nanocrystals; nanomaterials; composites; surface engineering; biomedicinal applications
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Crystal Structure and Characterization of Minerals and Related Nanomaterials
edited by
submission deadline 25 Dec 2025 | 2 articles | Viewed by 1641 | Submission Open
Keywords: mineral; crystal; crystal structure; new mineral species and mineral groups; crystal chemistry and properties of minerals and related nanomaterials; chemical variability; homogeneity; advanced minerals and nanomaterials characterization
(This special issue belongs to the Section Mineralogical Crystallography and Biomineralization)
Phase Transformation and Microstructure Evolution of Alloys
edited by Bo Wang, Yuantao Xu and
submission deadline 25 Dec 2025 | 1 articles | Viewed by 1036 | Submission Open
Keywords: metals and alloys; phase transformation; hydrogen embrittlement; microstructure evolution; stress corrosion cracking; mechanical property; strengthening and toughening; precipitates; surface engineering; corrosion; thermodynamics
(This special issue belongs to the Section Crystalline Metals and Alloys)
Metal Coordination Complexes for Optical and Chirooptical Applications submission deadline 25 Dec 2025 | Viewed by 241 | Submission Open
Keywords: chirality; supramolecular chemistry; computational chemistry; metal coordination complexes; X-ray characterization
Modified Semiconductors: Synthesis, Structure and Advanced Applications
edited by Nivaldo Freire Andrade Neto
submission deadline 25 Dec 2025 | Viewed by 134 | Submission Open
Keywords: nanomaterials and nanotechnology; semiconductors; photocatalytic applications; electrochemical applications; crystallography; spectroscopy
(This special issue belongs to the Section Inorganic Crystalline Materials)
Exploring New Materials for the Transition to Sustainable Energy
edited by
submission deadline 29 Dec 2025 | 6 articles | Viewed by 8377 | Submission Open
Keywords: structural characterization; nanocrystalline materials; thermal behavior; design materials; electronic structures (interface electronic structure); photocatalytic (materials; behavior; degradation); solar energy (solar cells; energy conversion); energy storage (electrolytes; energy storage materials; batteries); transport properties; electrochemical energy systems (battery; supercapacitor); functional materials; sustainable materials; electrochemical materials; materials for energy
Advances in Low-Dimensional Materials for Electronics and Sensing Applications
edited by and
submission deadline 30 Dec 2025 | 11 articles | Viewed by 50436 | Submission Open
Keywords: low-dimensional materials; low-dimensional devices; medical diagnosis; gas sensors; flexible electronics; optoelectronics; nanodevices; nanomechanics; MEMS/NEMS
(This special issue belongs to the Section Inorganic Crystalline Materials)
Celebrating the 10th Anniversary of International Crystallography submission deadline 31 Dec 2025 | 20 articles | Viewed by 35791 | Submission Open
Keywords: crystals; crystal growth; characterization techniques; crystalline; structure properties and applications of crystalline materials
Co-Crystals and Polymorphic Transition in Energetic Materials
edited by , and
submission deadline 31 Dec 2025 | 5 articles | Viewed by 20850 | Submission Open
Keywords: energetic co-crystals; crystal phases control; polymorphic transition inhibition; crystal structure prediction
(This special issue belongs to the Section Crystal Engineering)
Feature Papers on “Hybrid and Composite Crystalline Materials” 2025
edited by
submission deadline 31 Dec 2025 | 4 articles | Viewed by 5583 | Submission Open
Keywords: hybrid materials; composite materials; intermolecular interactions; molecular crystals; coordination polymers; metal– organic frameworks; covalent organic frameworks; hierarchical zeolites; zeolite-like materials; organic– inorganic hybrids; graphene; carbon nitride; layered sulfides; metal nanoparticles; metal oxide nanoparticles; metal chalcogenide nanoparticles; metal pnictide nanoparticles; MXenes
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Microstructure Evolution and Deformation Mechanisms in Lightweight Alloys
edited by Song Tang, Yuze Li, Zongde Kou and
submission deadline 31 Dec 2025 | 2 articles | Viewed by 4844 | Submission Open
Keywords: magnesium alloys; aluminium alloys; titanium alloys; microstructure evolution; plastic deformation
(This special issue belongs to the Section Crystalline Metals and Alloys)
Optical Vortices and Solitons submission deadline 31 Dec 2025 | Viewed by 387 | Submission Open
Keywords: vortex structures; solitons; nonlinear optics; biophotonics
Advanced Research on Perovskite Solar Cells
edited by Chunyang Zhang, , and
submission deadline 31 Dec 2025 | Viewed by 382 | Submission Open
Keywords: perovskite; solar cell; carbon-based; stable; cost; efficient; energy; structural design
(This special issue belongs to the Section Materials for Energy Applications)
Graphene-Related and Graphene-Like Reinforcements in Composites: Manufacturing and Applications
edited by and Silvia Vesco
submission deadline 31 Dec 2025 | Viewed by 310 | Submission Open
Keywords: two-dimensional materials; polymer composites; metal matrix composites; coatings; particle reinforcement; green manufacturing; lightweighting; wear resistance; mechanical performances; conductivity
Metamaterials and Their Devices, Second Edition
edited by
submission deadline 10 Jan 2026 | 9 articles | Viewed by 17154 | Submission Open
Keywords: metamaterials; lattice metamaterials; crystal materials and structures; plasmonic and dielectric metamaterials; photonic crystals; phononic crystals; metasurfaces; fundamental issues; emerging fields for MMs; electromagnetic response; magnetic-resonance; electric-resonance; numerical methods; applications
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Performance and Processing of Metal Materials
edited by Zhanfeng Wang and Benilde F. O. Costa
submission deadline 10 Jan 2026 | 3 articles | Viewed by 3056 | Submission Open
Keywords: metal materials; high-performance alloys; advanced processing techniques; material behavior modeling; mechanical properties
(This special issue belongs to the Section Crystalline Metals and Alloys)
Advances in Glass-Ceramics
edited by and Janusz Partyka
submission deadline 10 Jan 2026 | 2 articles | Viewed by 1794 | Submission Open
Keywords: glass-ceramics; polycrystalline materials; crystallization of glass; nucleation and crystal growth
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Surface Modification Treatments of Metallic Materials (2nd Edition)
edited by , Zongwei Ren and
submission deadline 10 Jan 2026 | 1 articles | Viewed by 956 | Submission Open
Keywords: surface modification; surface integrity; microstructure; residual stress; surface morphology; microhardness; metallic materials; mechanical property; fatigue; high-performance manufacturing
(This special issue belongs to the Section Crystalline Metals and Alloys)
Structure and Characterization of Enzymes
edited by
submission deadline 10 Jan 2026 | 1 articles | Viewed by 847 | Submission Open
Keywords: enzyme structure; biocatalysis; structure– function relationship; X-ray crystallography; artificial intelligence in structural biology
Synchrotron X-Ray Techniques in the Study of Nanomaterials
edited by Lucas Atila Bernardes Marçal, Ângelo Malachias de Souza and
submission deadline 10 Jan 2026 | Viewed by 195 | Submission Open
Keywords: X-ray diffraction; crystallography; synchrotron radiation; nanomaterials; crystal dynamics; X-ray spectroscopy; nano-device characterization
2D Crystalline Nanomaterials (2nd Edition)
edited by Yao Yao
submission deadline 10 Jan 2026 | Viewed by 191 | Submission Open
Keywords: 2D crystalline nanomaterial; device; electronic
Mechanical Properties of Light Alloys
edited by Wenjie Song and
submission deadline 10 Jan 2026 | Viewed by 183 | Submission Open
Keywords: magnesium; microstructure; mechanical properties; friction stir welding; cast; plastic deformation; hydrogen storage; kinetics; titanium; aluminum; titanium alloy casting; high-performance aluminum alloy; counter-gravity casting; titanium aluminide
Advances in Metal Matrix Composites (Second Edition)
edited by
submission deadline 15 Jan 2026 | 2 articles | Viewed by 5945 | Submission Open
Keywords: metal matrix composites; additive manufacturing; nanocarbons; spark plasma sintering; powder metallurgy; interface control; strengthening mechanism; mechanical response; functional properties
(This special issue belongs to the Section Crystalline Metals and Alloys)
Lanthanide Coordination Complexes: Advances in Ligand Design, Structure, and Luminescent Applications
edited by Nawal Al-Rasbi
submission deadline 15 Jan 2026 | Viewed by 471 | Submission Open
Keywords: lanthanide(III) coordination complexes; crystal structure; ligand’ s design; luminescence properties; light emitting diodes (LEDs); luminescent chemo-sensors; antibacterial and antimicrobial activity
(This special issue belongs to the Section Inorganic Crystalline Materials)
Alloy Materials Degradation and Microstructural Study submission deadline 15 Jan 2026 | Viewed by 321 | Submission Open
Keywords: high-temperature corrosion; material degradation; extreme environment materials; hot corrosion; molten salt corrosion; scanning electron microscopy; mechanical properties; corrosion mechanism; corrosion-resistant alloys; coatings; microstructure characterization
(This special issue belongs to the Section Crystalline Metals and Alloys)
Advances in Crystalline Nanocellulose and Its Derivatives for Sustainable Functional Materials
edited by Carlos Molina-Ramírez and
submission deadline 15 Jan 2026 | Viewed by 184 | 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)
Crystalline Materials for Energy Storage submission deadline 15 Jan 2026 | Viewed by 100 | Submission Open
Keywords: energy storage; solid-state electrolytes; flexible and wearable storage devices; thin-film supercapacitors; integration of harvesting/storage elements
(This special issue belongs to the Section Materials for Energy Applications)
Metal Oxide-Based Nanomaterials: Advances in Synthesis, Characterization, and Applications submission deadline 20 Jan 2026 | 2 articles | Viewed by 7214 | Submission Open
Keywords: metal-oxide-based nanomaterials; nanocrystals; synthesis techniques; characterization; environmental remediation; catalysis; biomedical applications; green synthesis; toxicity assessment; sustainability; interdisciplinary research; machine learning; innovative research; environmental monitoring; drug delivery; life cycle analysis
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Advances in Nanomaterials and Nanocomposites for Catalytic Applications
edited by
submission deadline 20 Jan 2026 | 4 articles | Viewed by 6507 | Submission Open
Keywords: nanomaterials; nanocomposites; nanocatalysts; catalytic performance; pollutant degradation; energy
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Analysis of Halogen and Other σ-Hole Bonds in Crystals (2nd Edition)
edited by
submission deadline 20 Jan 2026 | 5 articles | Viewed by 4151 | Submission Open
Keywords: halogen bonding; sigma-hole bonding; electrostatic potentials; nature of noncovalent interactions
(This special issue belongs to the Section Crystal Engineering)
Synthesis, Characterization and Applications of Multi-Component Hybrid and Composite Nanostructures
edited by
submission deadline 20 Jan 2026 | 2 articles | Viewed by 2128 | Submission Open
Keywords: multi-component (nano-)structures; inorganic/organic (nano-)structures; synthesis and characterization; healthcare applications
Synergizing Crystallography, Mineral Materials Science and Solid Waste Upcycling for Sustainable Materials Innovation
edited by Limei Wu, Xin Liu and
submission deadline 20 Jan 2026 | 1 articles | Viewed by 422 | Submission Open
Keywords: mineral crystallography; mineral materials; solid waste valorization; AI-driven material design
Research and Applications of TiO2 Nanotube Layers submission deadline 21 Jan 2026 | Viewed by 223 | Submission Open
Keywords: TiO2 nanotube layers; upscaling; bipolar electrochemistry; anodization; photocatalysis; biomedical devices; environmental remediation; energy storage
Ceramic Materials: Structural, Mechanical and Dielectric Properties
edited by and
submission deadline 25 Jan 2026 | 2 articles | Viewed by 1692 | Submission Open
Keywords: dielectric materials; functional ceramics; complex oxides; ferroelectric materials; non-Debye relaxation; solid-state synthesis; sol– gel synthesis; structural characterization (XRD; SEM; Raman; XPS); composition– structure– property relationships; energy storage; microwave devices; flexible electronics; materials for communication systems; multifunctional composites; impedance analyzer; crystallographic; microstructural; optical properties
(This special issue belongs to the Section Polycrystalline Ceramics)
Crystalline Materials for Energy Conversion Applications in Solar Cells
edited by Eros Radicchi and Francesca Lo Presti
submission deadline 10 Feb 2026 | 4 articles | Viewed by 5238 | Submission Open
Keywords: solar cells; up-conversion; down-conversion; down-shifting; cystalline materials
(This special issue belongs to the Section Materials for Energy Applications)
Mechanical Properties of Microcrystalline Glass
edited by
submission deadline 10 Feb 2026 | 1 articles | Viewed by 2818 | Submission Open
Keywords: mechanical properties; crystalline glass; glass; glass-ceramic; hardness; crack resistance; fracture toughness; X-ray diffraction; optical properties; theoretical models
Research Progress of Crystalline Metamaterials submission deadline 10 Feb 2026 | 2 articles | Viewed by 2663 | Submission Open
Keywords: metamaterials; coding metamaterial; metadevices; cloaking; radar cross-section reduction; electromagnetic absorbtion reduction; imaging; sensing
(This special issue belongs to the Section Inorganic Crystalline Materials)
Superconductivity and Condensed Matter Physics
edited by Byungkyun Kang
submission deadline 10 Feb 2026 | 2 articles | Viewed by 2127 | Submission Open
Keywords: superconductors  ; high-temperature superconductivity; low-dimensional crystals; hydrides; spin-triplet superconductor; nanostructure; magnetism  ; topological quantum
(This special issue belongs to the Section Inorganic Crystalline Materials)
Mechanical Properties and Structure of Metal Materials
edited by Xiang Li, Wei Zhang and
submission deadline 10 Feb 2026 | 3 articles | Viewed by 1645 | Submission Open
Keywords: metal; metal-based metamaterials; architected metamaterials; microstructure; pores; honeycomb materials; lattice materials; truss materials; sandwich structure; cellular materials; mechanical property; structural design; application
(This special issue belongs to the Section Crystalline Metals and Alloys)
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