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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Organic Photonics: Organic Optical Functional Materials and Devices
edited by Yaoxing Bian, Xiaoyu Shi and Junhua Tong
submission deadline 30 Jun 2025 | 4 articles | Viewed by 7050 | Submission Open
Keywords: micro- and nano-cavity lasers; random laser; light-emitting materials and devices; photophysics and spectroscopy for light-emitting materials; photodetection techniques; sensors; micro-nano structured organic semiconductor materials and devices; non-Hermitian; parity– time symmetry; organic flexible driving material; organic smart material
(This special issue belongs to the Section Organic Crystalline Materials)
Metamaterials and Their Devices, Second Edition
edited by
submission deadline 30 Jun 2025 | 5 articles | Viewed by 4799 | 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)
Recent Advances in the Mechanical Properties of Fiber Composite Materials
edited by Shouzheng Sun and Zhenyu Han
submission deadline 30 Jun 2025 | 3 articles | Viewed by 4447 | Submission Open
Keywords: resin-based composites; fiber-reinforced polymers; biocomposites  ; nanocomposites  ; manufacturing methods  ; process research  ; mechanical properties; natural fibers
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Design and Synthesis of Functional Crystal Materials
edited by Lili Li
submission deadline 30 Jun 2025 | 3 articles | Viewed by 2077 | Submission Open
Keywords: crystal structure; synthesis and preparation of functional crystals; applications of functional crystals; theoretical design; electronic structure and optical properties; piezoelectric; semiconductor; nonlinear optical; and thermoelectric materials
(This special issue belongs to the Section Inorganic Crystalline Materials)
Advances in Solid Electrolytes for Solid-State Batteries
edited by Ruijie Ye and Daisuke Mori
submission deadline 30 Jun 2025 | Viewed by 183 | Submission Open
Keywords: solid electrolytes; solid-state batteries; synthesis and preparation methods; ceramic processing; inorganics– polymer composites; electrode– electrolyte interfaces; defect chemistry; solid-state ionics; ionic conduction; solid-state NMR; operando characterization
(This special issue belongs to the Section Materials for Energy Applications)
Advanced Materials for Thermoelectric Energy Conversion
edited by Zhenhong Dai and Yinchang Zhao
submission deadline 30 Jun 2025 | Viewed by 157 | Submission Open
Keywords: thermoelectric materials; density functional theory and first-principles calculations; dynamics of anharmonic lattices; phonon coherence effect; lattice heat transport and electronic transport
(This special issue belongs to the Section Materials for Energy Applications)
Lanthanide Coordination Complexes: Advances in Ligand Design, Structure, and Luminescent Applications
edited by Nawal Al-Rasbi
submission deadline 5 Jul 2025 | Viewed by 239 | 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)
Shape Memory Alloys: Recent Advances and Future Perspectives
edited by , Chong Gao and
submission deadline 10 Jul 2025 | 3 articles | Viewed by 6644 | Submission Open
Keywords: shape memory alloys; shape memory effect; smart materials; microstructures; mechanical properties; phase transformations; 3D/4D printing; grains; textures; programmed morphing
(This special issue belongs to the Section Crystalline Metals and Alloys)
Structural and Characterization of Composite Materials
edited by , and Karolina Ewelina Mazur
submission deadline 10 Jul 2025 | 5 articles | Viewed by 5675 | Submission Open
Keywords: properties of composite materials; manufacturing considerations; reinforcements; matrix materials; polymer matrix composites; mechanical and physical properties of composites; polymer matrix composite applications; metal matrix composite applications; carbon matrix composite applications; ceramic matrix composite applications
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Structure & Properties of Novel Ferroelectric Liquid Crystals
edited by Yuri Panarin
submission deadline 10 Jul 2025 | 1 articles | Viewed by 5572 | Submission Open
Keywords: ferroelectric smectic liquid crystals; bent-core liquid crystals; nematic liquid crystals; helix; dynamics; relaxation
(This special issue belongs to the Section Liquid Crystals)
Advanced High-Strength Steel
edited by Binbin Wu, , Xiangyu Xu and
submission deadline 10 Jul 2025 | 4 articles | Viewed by 4576 | Submission Open
Keywords: steel; phase transformations; mechanical properties; fatigue; precipitation; materials characterization; thermodynamic simulations; crystallography; materials processing; additive manufacturing
(This special issue belongs to the Section Crystalline Metals and Alloys)
Graphene-Based Materials and Applications
edited by Lu Qi and
submission deadline 10 Jul 2025 | 2 articles | Viewed by 2295 | Submission Open
Keywords: graphene-based materials; two-dimensional materials; crystal structure; synthesis and characterization techniques
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Advances in High Performance Metal Materials: Preparation, Properties, and Applications
edited by Mingxing Ma, Cong Zhao and Zhixin Wang
submission deadline 10 Jul 2025 | 3 articles | Viewed by 1806 | Submission Open
Keywords: metals/alloys; coatings; nano materials; micro-nano structure; phase transformation; microstructure; mechanical properties; corrosion behavior; first-principles calculation; preparation and applications
(This special issue belongs to the Section Crystalline Metals and Alloys)
Single-Crystalline Composite Materials (Second Edition) submission deadline 10 Jul 2025 | 1 articles | Viewed by 1462 | Submission Open
Keywords: single crystals; composites; crystallization; structural defects; testing methods
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Structural and Mechanical Properties of Novel Mg Alloys
edited by Lei Xiao and Xinkai Ma
submission deadline 10 Jul 2025 | 1 articles | Viewed by 1420 | Submission Open
Keywords: As-cast and wrought Mg alloys; additive manufacturing of Mg alloys; microstructure– property characterizations; simulation and modeling; structure design; alloy development; strengthening and toughening mechanisms
(This special issue belongs to the Section Crystalline Metals and Alloys)
Growth, Structural Identification, and Characterization of Semiconductor Alloys and Low-Dimensional Heterostructures
edited by
submission deadline 10 Jul 2025 | 2 articles | Viewed by 1382 | Submission Open
Keywords: epitaxial growth including (MBE; CVD; MOCVD; etc.); group-IV elemental semiconductors and alloys; III-V; III-N; II-VI; and IV-IV compound semiconductors and alloys; designing low-dimensional heterostructures (MQWs; SLs; etc.) for devices; IR; Raman scattering; photoluminescence; spectroscopic ellipsometry; characterization techniques; etc.; simulations of structural; electronic; vibrational; and thermal transport in MQWs and SLs
(This special issue belongs to the Section Crystalline Metals and Alloys)
Research on the Structural Evolution and Properties of High-Performance Coatings and Thin Films
edited by Jian Peng, Junjun Wang and
submission deadline 10 Jul 2025 | 1 articles | Viewed by 694 | Submission Open
Keywords: high-performance coatings; thin films; structural evolution; advanced fabrication techniques; computational material design
Research on Crystallization of Biomacromolecules
edited by Xiaoxi Yu and
submission deadline 10 Jul 2025 | Viewed by 172 | Submission Open
Keywords: biomolecular crystallization; biomineralization; biomacromolecule purification and extraction; new methodologies
(This special issue belongs to the Section Biomolecular Crystals)
Reviews in Liquid Crystals submission deadline 15 Jul 2025 | 4 articles | Viewed by 11959 | Submission Open
Keywords: computer-aided molecular design; synthesis and characterization; the alignment of liquid crystals; macroscopic and microscopic properties; phase structure and phase transitions; electro- and thermooptical effects; display device architecture; polymeric and biological liquid crystals; the theory of liquid crystals; ferroelectric and antiferroelectric liquid crystals
(This special issue belongs to the Section Liquid Crystals)
Crystallization of High Performance Metallic Materials (2nd Edition)
edited by and
submission deadline 15 Jul 2025 | 7 articles | Viewed by 10709 | Submission Open
Keywords: solidification of steels and alloys; casting process; solid phase transformation; high-performance metallic materials; in-situ characterization; nucleation and growth in metals; inclusion/precipitate engineering in steels and alloys; slag and flux engineering; thermodynamics and kinetics of crystallization; process– structure– property correlation in alloys; simulations
(This special issue belongs to the Section Crystalline Metals and Alloys)
High-Performance Metallic Materials
edited by Yunwei Gui, Lingxiao Ouyang and Sanbao Lin
submission deadline 15 Jul 2025 | 4 articles | Viewed by 6619 | Submission Open
Keywords: superalloys; light metals; additive manufacturing; severe plastic deformation; computer simulations
(This special issue belongs to the Section Crystalline Metals and Alloys)
Crystallisation Advances submission deadline 15 Jul 2025 | 6 articles | Viewed by 3826 | Submission Open
Keywords: nucleation; crystal growth; industrial crystallisation; crystallisation processes
(This special issue belongs to the Section Industrial Crystallization)
New Insights into Perovskite Materials: From Fundamental Science to Applications
edited by Tengteng Li, Shiqi Li and
submission deadline 15 Jul 2025 | 1 articles | Viewed by 2030 | Submission Open
Keywords: perovskite materials; perovskite solar cells; perovskite light-emitting diodes; perovskite photodetectors; perovskite lasers; perovskite-based new theory; perovskite-based applications
(This special issue belongs to the Section Materials for Energy Applications)
Mechanical Properties and Friction Behavior of Metal Alloys and Their Composites
edited by Jingwen Qiu
submission deadline 15 Jul 2025 | 1 articles | Viewed by 459 | Submission Open
Keywords: mechanical properties; friction and wear; lubrication; steel; aluminum alloy; titanium alloy; magnesium alloy; high-entropy alloy; composites; EBSD; TEM; APT
(This special issue belongs to the Section Crystalline Metals and Alloys)
The Development and Applications of Femtosecond Lasers
edited by
submission deadline 15 Jul 2025 | Viewed by 267 | Submission Open
Keywords: femtosecond laser sources; ultrafast spectroscopy; electron and phonon dynamics; multiphoton imaging; nonlinear optical imaging; ultrafast all-optical signal processing; femtosecond laser irradiation and micromachining; laser-based surgery
Mechanical Properties of Microcrystalline Glass
edited by
submission deadline 16 Jul 2025 | 1 articles | Viewed by 1433 | Submission Open
Keywords: mechanical properties; crystalline glass; glass; glass-ceramic; hardness; crack resistance; fracture toughness; X-ray diffraction; optical properties; theoretical models
Advances in Functional Inorganic Materials Prepared by Wet Chemical Methods (Third Edition) submission deadline 20 Jul 2025 | 4 articles | Viewed by 6414 | Submission Open
Keywords: multifunctional materials; magnetic materials; ferroelectric materials; piezoelectric materials; optical materials; processing routes; ceramics
(This special issue belongs to the Section Inorganic Crystalline Materials)
Nanomaterials for Environmental and Solar Energy Applications
edited by Sofia Stefa and
submission deadline 20 Jul 2025 | 2 articles | Viewed by 3584 | Submission Open
Keywords: nanomaterial synthesis; physicochemical properties; band gap energy tuning; solar energy; environmental remediation; energy conversion; photocatalysis; thermochromic coatings; solar cells; batteries
(This special issue belongs to the Section Materials for Energy Applications)
Advanced Research of Silicon Photonics and Optoelectronics Devices
edited by Nicola Peserico and Martin Thomaschewski
submission deadline 20 Jul 2025 | 1 articles | Viewed by 2598 | Submission Open
Keywords: silicon photonics; optoelectronic devices; photonic integrated circuits; interconnect; optical computing; free-space communications; photonic integration; advanced materials for photonics
(This special issue belongs to the Section Materials for Energy Applications)
Research and Application of Photoelectrocatalytic Materials
edited by Yanming Fu, and Zili Ma
submission deadline 20 Jul 2025 | 2 articles | Viewed by 2320 | Submission Open
Keywords: photoelectrocatalytic; photoelectrode materials; solar energy storage; high-value-added products; structure modulations; surface science
(This special issue belongs to the Section Materials for Energy Applications)
Optical Properties of Crystalline Semiconductors and Nanomaterials
edited by
submission deadline 20 Jul 2025 | 2 articles | Viewed by 1999 | Submission Open
Keywords: semiconductors; optoelectronics; quantum dots; nanoparticles; nanostructures; quantum materials; photoluminescence; photoelectric
(This special issue belongs to the Section Inorganic Crystalline Materials)
New Trends in Materials for Permanent Magnets submission deadline 20 Jul 2025 | 1 articles | Viewed by 1910 | Submission Open
Keywords: permanent magnet; magnetic materials; magnetic properties; maximum energy product; rare earth; nanocomposite; powders; melt-spun ribbons; recycling
(This special issue belongs to the Section Inorganic Crystalline Materials)
Synthesis and Catalytic Performance of Transition Metal Catalysts
edited by and
submission deadline 20 Jul 2025 | 2 articles | Viewed by 1693 | Submission Open
Keywords: transition metal catalysts; metal– organic frameworks; metal oxide; electrocatalysis; doped composites; catalytic performance
(This special issue belongs to the Section Materials for Energy Applications)
Emerging Topics of High-Performance Alloys (2nd Edition)
edited by , , and Chau-Yi Tsai
submission deadline 20 Jul 2025 | 1 articles | Viewed by 1597 | Submission Open
Keywords: smart materials; high-performance alloys; shape memory alloys; high entropy alloys; high-strength aluminum alloys; mechanical property; microstructure characterization
(This special issue belongs to the Section Crystalline Metals and Alloys)
Analysis of Halogen and Other σ-Hole Bonds in Crystals (2nd Edition)
edited by
submission deadline 20 Jul 2025 | 1 articles | Viewed by 1071 | Submission Open
Keywords: halogen bonding; sigma-hole bonding; electrostatic potentials; nature of noncovalent interactions
(This special issue belongs to the Section Crystal Engineering)
New Insights into Photonic Crystal Fibers: From Fundamentals to Materials Performance submission deadline 20 Jul 2025 | Viewed by 364 | Submission Open
Keywords: photonic crystal fibers; microstructured optical fibers; the design and fabrication of photonic crystal fibers; post processing of photonic crystal fibers; optical communication; optical fiber sensors; optical fiber devices; optical fiber interferometers; nonlinear phenomena in optical fibers
(This special issue belongs to the Section Inorganic Crystalline Materials)
Metal Oxide Nanocomposites and Thin Films: Fabrication, Properties, and Applications submission deadline 20 Jul 2025 | Viewed by 291 | Submission Open
Keywords: metal oxide nanocomposites; metal oxide thin films; nanostructures; solution-based processes; sustainable materials; device physics; flexible electronics transparent electronics
Materials Dedicated to Perovskite Optoelectronic Functional Materials and Devices
edited by , Hengwei Qiu and Qixuan Zhong
submission deadline 20 Jul 2025 | Viewed by 169 | Submission Open
Keywords: LEDs; solar cells; nanocrystals; perovskite material; II-IV and III-V compound; advanced characterizations
(This special issue belongs to the Section Inorganic Crystalline Materials)
Properties and Defects of Silicon Carbide
edited by Yingxin Cui and
submission deadline 20 Jul 2025 | Viewed by 138 | Submission Open
Keywords: silicon carbide; electrical properties; doping; thermal conductivity; coefficient of thermal expansion; defects; SiC device
(This special issue belongs to the Section Inorganic Crystalline Materials)
Design and Energy Conversion of Functional Electrode Materials for Multivalent Ion Batteries
edited by Shunyu Yao
submission deadline 20 Jul 2025 | Viewed by 101 | Submission Open
Keywords: supercapacitors; electrocatalysis; energy density; ion batteries; cation intercalation
(This special issue belongs to the Section Materials for Energy Applications)
Surface Modification Treatments of Metallic Materials (2nd Edition)
edited by , Zongwei Ren and
submission deadline 22 Jul 2025 | 1 articles | Viewed by 414 | 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)
II-VI and III-V Semiconductors for Optoelectronic Devices
edited by and Ziyuan Li
submission deadline 30 Jul 2025 | 4 articles | Viewed by 2731 | Submission Open
Keywords: II-VI semiconductors; III-V semiconductors; solid-state physics; optics; optoelectronics; lasers; detectors; photovoltaic solar cells; ultrafast carrier dynamics
(This special issue belongs to the Section Materials for Energy Applications)
Growth and Properties of Novel Scintillator Crystals submission deadline 30 Jul 2025 | 1 articles | Viewed by 716 | Submission Open
Keywords: novel scintillator crystals; halide scintillator crystals; eutectic scintillator crystals; nanoparticle scintillator crystals; shape-controlled scintillator crystals; novel and modified growth method
(This special issue belongs to the Section Inorganic Crystalline Materials)
Advances and Perspectives in Noble Metal Nanoparticles submission deadline 30 Jul 2025 | 1 articles | Viewed by 464 | 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)
Laser Technology: Numerical and Experimental Investigations of Alloys
edited by
submission deadline 30 Jul 2025 | Viewed by 123 | Submission Open
Keywords: laser processing; alloys; material characterization; numerical simulation
(This special issue belongs to the Section Crystalline Metals and Alloys)
Reviews of Crystal Engineering submission deadline 31 Jul 2025 | 6 articles | Viewed by 21339 | Submission Open
Keywords: inter- and intramolecular interactions; σ -hole and π -hole bonds; molecular crystals; cooperativity effects; structure motifs; molecular geometry; the correlation of parameters describing structures; substituent effects; structures of aromatic compounds; charge density analysis; comparison of various interactions
(This special issue belongs to the Section Crystal Engineering)
Properties of Transition Metals and Their Compounds at Extreme Conditions (2nd Edition) submission deadline 31 Jul 2025 | 6 articles | Viewed by 13282 | 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)
Bioinspired Mineralization of Dental Tissues
edited by
submission deadline 31 Jul 2025 | 1 articles | Viewed by 596 | Submission Open
Keywords: remineralization; biomaterials; crystallization; fluoride
(This special issue belongs to the Section Mineralogical Crystallography and Biomineralization)
Novel Crystalline Catalysts
edited by Lili Wan
submission deadline 31 Jul 2025 | Viewed by 362 | Submission Open
Keywords: synthesis of novel crystals; nanocrystal; nanocluster; single crystal; polycrystal; composite crystal; effect of crystal phase; crystal structure; exposed crystal phase or crystal defects on catalysis; green energy conversion; degradation of pollutant; green synthesis; structure activity relationship
(This special issue belongs to the Section Materials for Energy Applications)
Protein Crystallography: The State of the Art submission deadline 10 Aug 2025 | 5 articles | Viewed by 7078 | Submission Open
Keywords: time-resolved serial crystallography in XFEL and synchrotrons (TR-SFX; TR-SSX); pink beam crystallography; small-angle X-ray scattering (SAXS); structural-based drug discovery; mechanistic enzymology; membrane proteins; macromolecular complexes; software developments for macromolecular crystallography; deep learning and artificial intelligence
(This special issue belongs to the Section Macromolecular Crystals)
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