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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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Exploring New Materials for the Transition to Sustainable Energy

edited by

Raluca Mereu

submission deadline 29 Dec 2025 | 5 articles | Viewed by 6855 | 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

Hu Li

and

Klaus Leifer

submission deadline 30 Dec 2025 | 11 articles | Viewed by 48269 | 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

edited by

Alessandra Toncelli

Vladimir Chigrinov

José Gavira

Jesús Sanmartín-Matalobos

Zongyou Yin

and

Shujun Zhang

submission deadline 31 Dec 2025 | 20 articles | Viewed by 31119 | 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

Yapeng Ou

Tao Yan

and

Siwei Song

submission deadline 31 Dec 2025 | 5 articles | Viewed by 19454 | 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

Leonid M. Kustov

submission deadline 31 Dec 2025 | 4 articles | Viewed by 4709 | 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

Zhan Chen

submission deadline 31 Dec 2025 | 2 articles | Viewed by 4466 | Submission Open

Keywords: magnesium alloys; aluminium alloys; titanium alloys; microstructure evolution; plastic deformation

(This special issue belongs to the Section Crystalline Metals and Alloys)

Advances and Perspectives in Noble Metal Nanoparticles

edited by

Magdalena Laskowska

and

Agnieszka Karczmarska

submission deadline 31 Dec 2025 | 2 articles | Viewed by 1288 | 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)

Optical Vortices and Solitons

edited by

Valeri Slavchev

and

Francesco Simoni

submission deadline 31 Dec 2025 | Viewed by 369 | Submission Open

Keywords: vortex structures; solitons; nonlinear optics; biophotonics

Advanced Research on Perovskite Solar Cells

edited by Chunyang Zhang,

Sawanta Mali

Guanying Chen

and

Dou Zhang

submission deadline 31 Dec 2025 | Viewed by 304 | 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

Daniel Salvi

and Silvia Vesco

submission deadline 31 Dec 2025 | Viewed by 270 | 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

Youngpak Lee

submission deadline 10 Jan 2026 | 8 articles | Viewed by 13795 | 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 2520 | 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

Katarzyna Pasiut

and Janusz Partyka

submission deadline 10 Jan 2026 | 2 articles | Viewed by 1574 | 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

Yong Wang

, Zongwei Ren and

Jiaqiang Dang

submission deadline 10 Jan 2026 | 1 articles | Viewed by 838 | 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

Jung-Min Choi

submission deadline 10 Jan 2026 | 1 articles | Viewed by 693 | Submission Open

Keywords: enzyme structure; biocatalysis; structure– function relationship; X-ray crystallography; artificial intelligence in structural biology

2D Crystalline Nanomaterials (2nd Edition)

edited by Yao Yao

submission deadline 10 Jan 2026 | Viewed by 177 | Submission Open

Keywords: 2D crystalline nanomaterial; device; electronic

Synchrotron X-Ray Techniques in the Study of Nanomaterials

edited by Lucas Atila Bernardes Marçal, Ângelo Malachias de Souza and

Yen-Po Liu

submission deadline 10 Jan 2026 | Viewed by 172 | Submission Open

Keywords: X-ray diffraction; crystallography; synchrotron radiation; nanomaterials; crystal dynamics; X-ray spectroscopy; nano-device characterization

Mechanical Properties of Light Alloys

edited by Wenjie Song and

Marek Sroka

submission deadline 10 Jan 2026 | Viewed by 164 | 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

Ismail Özdemir

submission deadline 15 Jan 2026 | 2 articles | Viewed by 5513 | 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 435 | 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

edited by

Adnan Syed

Adrianus Indrat Aria

and

Juho Lehmusto

submission deadline 15 Jan 2026 | Viewed by 264 | 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

Marlon Andrés Osorio-Delgado

submission deadline 15 Jan 2026 | Viewed by 151 | 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

edited by

Mariya Aleksandrova

and

Ivaylo Pandiev

submission deadline 15 Jan 2026 | Viewed by 86 | 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

edited by

Jorge Manuel Silva-Jara

Diego Eloyr Navarro-López

Luis Miguel Anaya-Esparza

and Miguel Angel López-Alvarez

submission deadline 20 Jan 2026 | 2 articles | Viewed by 6448 | 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

Balázs Zsirka

submission deadline 20 Jan 2026 | 4 articles | Viewed by 5860 | 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

Jane S. Murray

submission deadline 20 Jan 2026 | 4 articles | Viewed by 2816 | 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

Yury Ryabchikov

submission deadline 20 Jan 2026 | 2 articles | Viewed by 1276 | 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

Qingfeng Guo

submission deadline 20 Jan 2026 | Viewed by 184 | Submission Open

Keywords: mineral crystallography; mineral materials; solid waste valorization; AI-driven material design

Microstructure Analysis, Phase Composition and Properties of Steels

edited by

Mehmet Erdi Korkmaz

submission deadline 20 Jan 2026 | Viewed by 110 | Submission Open

Keywords: advanced characterization of steel microstructures (SEM; TEM; EBSD; XRD; etc.); phase transformations and kinetics in alloyed steels; relationships between microstructure and mechanical properties; heat treatment; thermomechanical processing; and surface modification; modeling and simulation of microstructural evolution; correlation of crystal structure and anisotropy with physical properties; steel behavior under extreme environments (e.g.; cryogenic; high temperature; corrosive); novel alloying concepts and high-performance steel grades (e.g.; AHSS; TRIP; TWIP; maraging)

(This special issue belongs to the Section Crystalline Metals and Alloys)

Research and Applications of TiO₂ Nanotube Layers

edited by

Marcela Sepúlveda

and

David Quintero Giraldo

submission deadline 21 Jan 2026 | Viewed by 214 | 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

Karim Chourti

and

Ilyas Jalafi

submission deadline 25 Jan 2026 | 2 articles | Viewed by 1047 | 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 4502 | 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

Theany To

submission deadline 10 Feb 2026 | 1 articles | Viewed by 2522 | 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

edited by

Mohammad Rashed Iqbal Faruque

submission deadline 10 Feb 2026 | 2 articles | Viewed by 2386 | 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 1706 | 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

Shouxun Ji

submission deadline 10 Feb 2026 | 3 articles | Viewed by 1398 | 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)

Density Functional Theory (DFT) in Crystalline Material

edited by

Tarciso Silva Andrade-Filho

, Rodrigo Gester and Mateus Ribeiro Lage

submission deadline 10 Feb 2026 | 1 articles | Viewed by 1289 | Submission Open

Keywords: density functional theory; crystalline materials; electronic structure; defects; phase stability; mechanical properties; surface science; high-throughput screening; machine learning; computational material science

Mechanical Properties and Friction Behavior of Metal Alloys and Their Composites

edited by Jingwen Qiu

submission deadline 10 Feb 2026 | 1 articles | Viewed by 744 | 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)

Crystallization Processes and Simulation Calculations, Fourth Edition

edited by

Mingyang Chen

Jinbo Ouyang

and Mingxuan Li

submission deadline 10 Feb 2026 | 1 articles | Viewed by 456 | 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)

Microstructure Characterization and Design of Advanced Alloys

edited by

Changling Zhuang

and

Patrice Berthod

submission deadline 10 Feb 2026 | 1 articles | Viewed by 435 | Submission Open

Keywords: advanced alloys; microstructure characterization; property optimization; multi-scale analysis; computational modeling

(This special issue belongs to the Section Crystalline Metals and Alloys)

Properties and Synthesis of Luminescent Materials

edited by

Ljubica Đačanin Far

and

Tamara V. Gavrilović

submission deadline 10 Feb 2026 | Viewed by 223 | Submission Open

Keywords: luminescent materials; lanthanide doping; transition metal doping; synthesis; structure– property correlations; optical properties; luminescence thermometry; fluorescence sensors; photocatalysis; defects

(This special issue belongs to the Section Materials for Energy Applications)

Perovskites: Crystal Structure, Properties and Applications

edited by

Kais Iben Nassar

Ben Salem Imen

and

Manuel Pedro Fernandes Graça

submission deadline 10 Feb 2026 | Viewed by 221 | 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)

Synthesis and Structure of Nanocomposites

edited by

Sonia Letichevsky

and Zahra Heydari

submission deadline 10 Feb 2026 | Viewed by 181 | Submission Open

Keywords: nanocomposites; synthesis methods; nanofillers; advanced characterization; nanomaterials engineering

Advances in Self-Assembled Luminescent Materials

edited by Gong Zhang,

Qing Li

and Jianrong Qiu

submission deadline 10 Feb 2026 | Viewed by 157 | Submission Open

Keywords: supramolecular polymers; supramolecular assembly; circularly polarized luminescence; chiral self-assembly; crystal structure; optoelectronic properties; aggregation-induced emission

Crystallization of High-Performance Metallic Materials (3rd Edition)

edited by

Wangzhong Mu

submission deadline 10 Feb 2026 | Viewed by 121 | Submission Open

Keywords: solidification of steel and alloys; casting process; solid phase transformation; high-performance metallic materials; in situ characterization; nucleation and growth in metals; inclusion/precipitate engineering in steel and alloys; slag and flux engineering; thermodynamics and kinetics of crystallization; process– structure– property correlation in alloys

(This special issue belongs to the Section Crystalline Metals and Alloys)

Advances in Zr-Based Alloys (2nd Edition)

edited by Quan Dong and

Jun Tan

submission deadline 10 Feb 2026 | Viewed by 98 | Submission Open

Keywords: microstructure; corrosion resistance; irradiation resistance; strengthening and toughening; mechanical properties; simulation

(This special issue belongs to the Section Crystalline Metals and Alloys)

Emerging Trends in Functional Oxide Ceramics

edited by Victor E. Álvarez-Montaño,

Javier Hernández-Paredes

and Subhash Sharma

submission deadline 17 Feb 2026 | Viewed by 80 | Submission Open

Keywords: functional oxide ceramics; high-entropy ceramics; crystal structure; solid-state synthesis; phase stability; dielectric properties; phase diagrams; complex oxides; structure– property relationships

(This special issue belongs to the Section Polycrystalline Ceramics)

Simulation on Casting and Solidification Process of Crystalline Metals and Alloys

edited by

Srećko Manasijević

submission deadline 25 Feb 2026 | Viewed by 132 | 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)

Machine Learning for Material and Process Optimization in Additive Manufacturing

edited by

Haining Zhang

Joon Phil Choi

and

Xingchen Liu

submission deadline 26 Feb 2026 | 1 articles | Viewed by 935 | 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 Deformation of Advanced Alloys (2nd Edition)

edited by