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 polices 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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New Insights into Photonic Crystal Fibers: From Fundamentals to Materials Performance submission deadline 20 Dec 2024 | Viewed by 38 | 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)
Structural and Mechanical Properties of Novel Mg Alloys
edited by Lei Xiao and Xinkai Ma
submission deadline 20 Dec 2024 | Viewed by 16 | 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)
Advanced Laser Crystals and Ceramic Materials
edited by Chao Feng, Liang Gao, Yunzheng Wang, Junlei Wang, and Feifei Chen
submission deadline 24 Dec 2024 | Viewed by 210 | Submission Open
Keywords: ultrafast lasers; ceramic lasers; ceramic nonlinear optics; nanomaterials; optical nano-manipulation; laser crystals; NOL crystals; crystal growth
(This special issue belongs to the Section Polycrystalline Ceramics)
Advanced Materials for Applications in Water Splitting
edited by Zhiyi Pan
submission deadline 25 Dec 2024 | 1 articles | Viewed by 563 | 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)
Plastic Deformation and Welding on Metallic Materials submission deadline 30 Dec 2024 | 1 articles | Viewed by 426 | Submission Open
Keywords: plastic deformation; hot working; cold working; welding; innovative methodology research; new technologies; physical and numerical simulation of plastic deformation; structure and mechanical properties
(This special issue belongs to the Section Crystalline Metals and Alloys)
Reviews of Crystal Engineering submission deadline 31 Dec 2024 | 3 articles | Viewed by 10051 | 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)
Feature Papers on "Hybrid and Composite Crystalline Materials" 2023–2024
edited by
submission deadline 31 Dec 2024 | 5 articles | Viewed by 8351 | 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
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Modern Technologies in the Manufacturing of Metal Matrix Composites
edited by
submission deadline 31 Dec 2024 | 4 articles | Viewed by 3839 | Submission Open
Keywords: metal matrix composites; additive manufacturing; friction stir processing; aluminum; copper; nickel; titanium alloys and steels; selective laser melting; electron beam additive manufacturing; selective laser sintering; coatings
(This special issue belongs to the Section Crystalline Metals and Alloys)
X-ray Protein Crystallography
edited by
submission deadline 31 Dec 2024 | 3 articles | Viewed by 3139 | Submission Open
Keywords: protein crystallography; X-ray crystallography; serial crystallography; structure determination; crys-tallization; data processing; radiation damage
(This special issue belongs to the Section Macromolecular Crystals)
Solution Processing and Properties of Oxide Films and Nanostructures
edited by , Chin-Hau Chia and
submission deadline 31 Dec 2024 | 1 articles | Viewed by 956 | Submission Open
Keywords: solution; synthesis; oxide; nanostructure
(This special issue belongs to the Section Inorganic Crystalline Materials)
Crystallization of High Performance Metallic Materials (II)
edited by and
submission deadline 31 Dec 2024 | 1 articles | Viewed by 792 | 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)
New Advanced Functional-Material-Based Photocatalysts
edited by Siming Wu, Yi Lu and
submission deadline 31 Dec 2024 | Viewed by 380 | Submission Open
Keywords: nanomaterials; semiconductors; functional materials; energy conversion; photocatalysis; water splitting; CO2 reduction; photodegradation
(This special issue belongs to the Section Materials for Energy Applications)
Microstructure and Properties of Metals and Alloys
edited by Zhongquan Zhang, and Ze Chai
submission deadline 31 Dec 2024 | Viewed by 185 | Submission Open
Keywords: metals/alloys; bulk materials; coatings; films; microstructure; phase; grain; interface; lattice; dislocation; vacancy; diffusion; mechanical property; strengthening; deformation; strain; electrical property; anti-corrosive property; magnetic property
(This special issue belongs to the Section Crystalline Metals and Alloys)
Emerging 2D Materials for Catalytic Water Splitting and Carbon Dioxide Reduction
edited by Sanjit Saha, and Tapas Kuila
submission deadline 31 Dec 2024 | Viewed by 71 | Submission Open
Keywords: two-dimensional materials; synthesis method; photocatalytic properties; catalytic mechanism; oxygen reduction reaction; hydrogen evolution reaction; CO2 reduction reaction; spectro-electrochemistry; in-situ electrochemistry; in-situ microscopy; gas separation; hybrid 2D material; 2D interfaces; surface adsorption; electrolyzer design
(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)
Molecular Beam Epitaxy of Metal Oxides Thin Films
edited by
submission deadline 31 Dec 2024 | Viewed by 70 | Submission Open
Keywords: molecular beam epitaxy (MBE); metal oxide thin films; growth mechanisms and kinetics; in situ characterization; oxide heterostructures; strain engineering; electronic devices; optoelectronics
(This special issue belongs to the Section Materials for Energy Applications)
Recent Advances in Non-destructive Testing Methods
edited by , and Hong Tang
submission deadline 31 Dec 2024 | Viewed by 62 | Submission Open
Keywords: silicon solar cell; composite materials; microwave detection; THz detection; iInfrared detection; ultrasound detection; iInfrared thermography; photoluminescence/electroluminescence; defect detection; reliability diagnosis; machine learning; signal and imaging processing.
MOF-Based Nanocomposites: Pioneering Developments in Photo-Electrocatalysis and Biosensing Technologies
edited by , Ravindranadh Koutavarapu and Ramachandra Naik
submission deadline 31 Dec 2024 | Viewed by 62 | Submission Open
Keywords: metal– organic frameworks (MOFs); nanocomposites; photo-electrocatalysis; biosensing technologies; nanomaterial integration; synthesis techniques
Nanoelectronics and Bioelectronics
edited by Abu Ul Hassan Sarwar Rana, and
submission deadline 31 Dec 2024 | Viewed by 50 | Submission Open
Keywords: nano-biotechnology; nanoelectronics; nanofabrication; crystalline materials; biosensors; nanomedicine; nanotechnology; functional materials; materials synthesis; wearable sensors; medical diagnostics
Crystallization Process and Simulation Calculation, Third Edition
edited by
submission deadline 31 Dec 2024 | Viewed by 30 | Submission Open
Keywords: nucleation and growth; agglomeration and breakage; process analytical technology; process intensification; continuous crystallization; spherical crystallization; molecular dynamics simulation; hydrodynamics simulation
(This special issue belongs to the Section Industrial Crystallization)
Nanotech Horizons: Innovating Water Remediation through Nanomaterial Applications
edited by
submission deadline 10 Jan 2025 | Viewed by 68 | Submission Open
Keywords: nanotechnology; environmental engineering; sustainable solutions; advanced filtration; pollution control; water treatment technologies; remediation techniques; nanoengineering; environmental impact; water purification
(This special issue belongs to the Section Inorganic Crystalline Materials)
Superalloy: Processing, Characterization and Performance
edited by Chuan Guo, Sheng Li, Jingchen Wang and Zhen Xu
submission deadline 15 Jan 2025 | Viewed by 43 | Submission Open
Keywords: high-temperature strength; thermal stability; oxidation resistance; corrosion resistance; nickel-based alloys; cobalt-based alloys; iron-based alloys; alloy composition; creep resistance; fatigue resistance; tensile strength; yield strength; impact resistance; toughness; hardness; elasticity; casting processes; forging processes; powder metallurgy; additive manufacturing; microstructural analysis; grain structure; phase composition; aerospace applications; jet engine components; gas turbine engines; power generation; nuclear applications
(This special issue belongs to the Section Crystalline Metals and Alloys)
Advances in Magnetic Functional Materials
edited by Yue Wang and Jie Chen
submission deadline 16 Jan 2025 | Viewed by 61 | Submission Open
Keywords: magnetic functional materials; novel material design and synthesis methods; characterization techniques; microstructural engineering; magnetic properties optimization; permanent magnet materials; skyrmion; magnetic semiconductors; magnetic shape memory alloys; giant magnetoresistive materials
(This special issue belongs to the Section Crystalline Metals and Alloys)
New Trends in Materials for Permanent Magnets submission deadline 20 Jan 2025 | Viewed by 162 | 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)
Advancements in High-Strength Silicon-Aided Steel and Their Phase Transformations submission deadline 1 Feb 2025 | Viewed by 207 | Submission Open
Keywords: bainitic transformation; steels; austempering; quench and partitioning; si-aided steels
(This special issue belongs to the Section Crystalline Metals and Alloys)
Additive Manufacturing: From Fundamentals to Materials Performance and Applications
edited by Sankaranarayanan Seetharaman and
submission deadline 20 Feb 2025 | Viewed by 71 | Submission Open
Keywords: additive manufacturing; powder bed fusion; directed energy deposition; selective laser melting; electron beam melting; wire arc additive manufacturing; metal binder jetting; heat treatment; material characterization; feedstock modification; qualification; simulations; microstructure; mechanical properties; alloy systems and alloy development; next-generation 4D printing; innovation in processing strategies; innovation and advancement in powder production; microstructure and property correlation; numerical simulation; defect and failure analysis; industrialization of the process
Electrochemical & Photoelectrochemical Photocatalysts: From Fundamentals to Materials Performance
edited by
submission deadline 20 Feb 2025 | Submission Open
Keywords: electrochemical; photoelectrochemical; photocatalysts; nanomaterials; H2 production; pollutant degradation; CO2 reduction; NH3 production
(This special issue belongs to the Section Materials for Energy Applications)
Advances in New Functional Biomaterials for Medical Applications, Second Edition submission deadline 28 Feb 2025 | Viewed by 37 | 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)
Porous Ceramics and Their Composite Materials
edited by , and Xinxin Jin
submission deadline 20 Mar 2025 | 1 articles | Viewed by 871 | Submission Open
Keywords: porous ceramics and composites; lightweight ceramics; porous geopolymer; ceramics for water purification; 3D-printed porous ceramics; sustainable ceramics derived from solid wastes; glass ceramic foams
(This special issue belongs to the Section Polycrystalline Ceramics)
Synthesis, Crystal Structures and Hirshfeld Surface Analysis of Coordination Compounds (3rd Edition) submission deadline 20 Mar 2025 | Viewed by 125 | 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 Trends in Laser Cladding and Surface Alloying
edited by and Tai-Nan Lin
submission deadline 20 Mar 2025 | Viewed by 92 | Submission Open
Keywords: laser cladding; surface alloying; laser welding; carburizing; nitriding; physical vapor deposition (PVD); chemical vapor deposition (CVD); surface repairing
(This special issue belongs to the Section Crystalline Metals and Alloys)
Metallurgy-Processing-Properties Relationship of Metallic Materials
edited by
submission deadline 20 Mar 2025 | Viewed by 58 | 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 Materials)
Catalyst Materials for Waste Treatment
edited by Hassan Shokry, and Mahmoud Samy
submission deadline 1 May 2025 | Viewed by 117 | Submission Open
Keywords: advanced oxidation processes; degradation of emerging pollutants; industrial waste treatment; nanomaterials; plastic waste; photo-degradation; photo-catalysis
(This special issue belongs to the Section Inorganic Crystalline Materials)
Hybrid Materials for Energy Storage and Conversion submission deadline 10 Jun 2025 | Viewed by 305 | Submission Open
Keywords: hybrid structure; materials engineering; pH; electrochemical  ; energy storage
(This special issue belongs to the Section Materials for Energy Applications)
Research Progress of Crystalline Metamaterials submission deadline 20 Jun 2025 | Viewed by 50 | 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)
Organic Photonics: Organic Optical Functional Materials and Devices
edited by Yaoxing Bian, Xiaoyu Shi and Junhua Tong
submission deadline 30 Jun 2025 | Viewed by 63 | 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)
Structural and Characterization of Composite Materials
edited by , and Karolina Ewelina Mazur
submission deadline 10 Jul 2025 | Viewed by 23 | 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)
State-of-the-Art Liquid Crystals Research in Japan (2nd Edition) submission deadline 30 Sep 2025 | Viewed by 144 | Submission Open
Keywords: liquid crystals; blue phase; stimulus responsiveness; photoalignment control; molecular dynamics simulations; rheology; X-ray diffraction; luminescence; electrical conductivity
(This special issue belongs to the Section Liquid Crystals)
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