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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 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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Pressure-Induced Phase Transformations (Third Edition)

edited by

Daniel Errandonea

and Akun Liang

submission deadline 25 Jan 2025 | 1 articles | Viewed by 588 | Submission Open

Keywords: high-pressure research; phase transitions; structural properties; transition mechanisms; equation of state; symmetry breaking; melting curves

(This special issue belongs to the Section Inorganic Crystalline Materials)

Adsorption Capabilities of Porous Materials

edited by

Wei Wu

submission deadline 25 Jan 2025 | Viewed by 87 | Submission Open

Keywords: adsorption; physio-sorption; chemisorption; porous materials; mesopores; micropores; surface area; molecules; environmental science; nano-science; nanotechnology; biological science; medical science

(This special issue belongs to the Section Inorganic Crystalline Materials)

Crystalline Materials: Polymorphism

edited by

Edward R.T. Tiekink

submission deadline 31 Jan 2025 | 7 articles | Viewed by 10451 | Submission Open

Keywords: polymorphism; pharmaceuticals; crystallisation; structure– property relationships; phase transformations; supramolecular chemistry; crystallography

(This special issue belongs to the Section Crystal Engineering)

Crystallography of Enzymes

edited by

Bo Liang

and

Houfu Guo

submission deadline 31 Jan 2025 | 4 articles | Viewed by 6172 | Submission Open

Keywords: enzyme; structure; function; X-ray crystallography; crystal; crystallization; catalytic mechanism; antagonist

(This special issue belongs to the Section Biomolecular Crystals)

Recent Advances in Zeolite Crystallization for Modern Applications

edited by

Khaled Sebakhy

and

Zhaohui Li

submission deadline 31 Jan 2025 | Viewed by 128 | Submission Open

Keywords: crystallization of zeolites; novel structures of zeolite; synthesis of smart materials; environmental remediation; advanced applications of zeolites; energy storage; green synthesis; porous materials; in situ techniques

Advancements in High-Strength Silicon-Aided Steel and Their Phase Transformations

edited by

Mattia Franceschi

and

Luca Pezzato

submission deadline 1 Feb 2025 | Viewed by 272 | Submission Open

Keywords: bainitic transformation; steels; austempering; quench and partitioning; si-aided steels

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

Graphene-Based Materials and Applications

edited by Lu Qi and

John Parthenios

submission deadline 1 Feb 2025 | Viewed by 110 | Submission Open

Keywords: graphene-based materials; two-dimensional materials; crystal structure; synthesis and characterization techniques

(This special issue belongs to the Section Crystalline Materials)

Crystal Structures and Applications of Perovskite Halides in Solar Cells

edited by Yutong Ren and

Sawanta Mali

submission deadline 6 Feb 2025 | Viewed by 99 | Submission Open

Keywords: crystal structures; perovskite halides; solar cells; X-ray diffraction; transmission electron microscopy; thin films; power conversion efficiency

Corrosion and Mechanical Performance of Magnesium Alloys

edited by

Björn Wiese

Mert Celikin

and Norbert Hort

submission deadline 10 Feb 2025 | 3 articles | Viewed by 6058 | Submission Open

Keywords: mg alloys; magnesium alloys; mg-based materials; processing; microstructure; precipitation; mechanical properties; corrosion; coating; degradation; modelling; simulation

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

Advanced High-Strength Steel

edited by Binbin Wu,

Xuelin Wang

, Xiangyu Xu and Yishuang Yu

submission deadline 10 Feb 2025 | Viewed by 235 | 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)

Microstructural Characterization and Property Analysis of Alloys

edited by Lei Wang

submission deadline 15 Feb 2025 | 1 articles | Viewed by 396 | Submission Open

Keywords: microstructural characterization; alloys; performance analysis; materials science; material performance optimization; crystallography

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

Electrically Active Defects: Studied by Junction Spectroscopy Techniques

edited by Ivana Capan

submission deadline 19 Feb 2025 | Viewed by 230 | Submission Open

Keywords: defects; deep levels; transient spectroscopy; semiconductors; Si; Ge; SiC; GaN; Ga2O3

Materials and Devices Grown via Molecular Beam Epitaxy

edited by Daqian Guo, Wuyang Ren and Thorsten Hesjedal

submission deadline 20 Feb 2025 | 4 articles | Viewed by 3974 | Submission Open

Keywords: epitaxy growth; lattice-mismatch epitaxy; heterostructure; superlattice; characterization methods; semiconductor devices

Coordination Complexes with Bio-Based Ligands

edited by

Laurent Plasseraud

submission deadline 20 Feb 2025 | 2 articles | Viewed by 3549 | Submission Open

Keywords: coordination chemistry; ligands; bio-based molecules; chemicals from biomass; biomolecules; green building blocks; metal complexes; coordination polymers; metal– organic materials; X-ray crystal structure determination

(This special issue belongs to the Section Macromolecular Crystals)

Protein Crystallography: The State of the Art

edited by

Vasundara Srinivasan

and Santosh Panjikar

submission deadline 20 Feb 2025 | 3 articles | Viewed by 2450 | 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)

Advances in Microstructure and Plastic Deformation of High-Strength Steels

edited by

Wojciech Borek

submission deadline 20 Feb 2025 | 2 articles | Viewed by 1787 | Submission Open

Keywords: microstructure of high-strength steels; hot working; cold working; plastic deformation; innovative methodology research; new technologies; thermomechanical treatment; physical and numerical simulation of plastic deformation; structure simulation after plastic deformation; structure and mechanical properties.

(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

V. Anil Kumar

submission deadline 20 Feb 2025 | Viewed by 127 | 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

Research and Application of Photoelectrocatalytic Materials

edited by Yanming Fu,

Xiaokang Wan

and Zili Ma

submission deadline 20 Feb 2025 | Viewed by 101 | 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)

Physical Mechanism of Welding of Metallic Materials (2nd Edition)

edited by

Fan Jiang

and

Mingxuan Yang

submission deadline 20 Feb 2025 | Viewed by 83 | Submission Open

Keywords: welds and joints; welding physics; welding modelling and simulation; welding metallurgy; molten pool; solidification and crystallization; microstructure; mechanical properties

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

Electrochemical & Photoelectrochemical Photocatalysts: From Fundamentals to Materials Performance

edited by

Zohreh Masoumi

submission deadline 20 Feb 2025 | Viewed by 65 | 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)

Research on Scintillators

edited by Siqi Li and Zhi Yang

submission deadline 20 Feb 2025 | Viewed by 54 | Submission Open

Keywords: new materials for scintillation; scintillator fabrication techniques; scintillators in medical; environmental; and security; advances in scintillator technology; scintillator modeling and simulation

(This special issue belongs to the Section Inorganic Crystalline Materials)

Sustainable Approaches in Metal Manufacturing and Developing Durable Metallic Alloys

edited by

Farshid Pahlevani

submission deadline 20 Feb 2025 | Viewed by 33 | Submission Open

Keywords: sustainable metal manufacturing; durable metallic alloys; eco-friendly manufacturing; waste reduction; energy-efficient processes; greenhouse gas emissions; corrosion resistance; mechanical properties; metal recycling; circular economy; advanced characterization techniques; microstructural analysis; compositional analysis; life cycle assessment (LCA); environmental impact

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

Synthesis and Characterization of Nanostructural Electrode Materials

edited by

Ahmed M.A. Hashem

and

Likun Zhu

submission deadline 25 Feb 2025 | 1 articles | Viewed by 8955 | Submission Open

Keywords: metal– ion batteries; cathode materials; anode materials; synthesis of electrode materials; characterization of electrode materials; storage materials; nanotechnology and rechargeable batteries

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

Synthesis, Characterization and Applications of Crystalline Electroconductive Polymers

edited by Rocco Carcione,

Silvia Battistoni

, Giorgio Scordo and

Robert A. Jackson

submission deadline 25 Feb 2025 | 2 articles | Viewed by 2238 | Submission Open

Keywords: electroconducting polymer-based materials; nanocomposites; carbon-based nanomaterials; biocomposite materials; polymerization processes; polymer matrix; surface modification; interfacial properties; applications; sensors and devices; morphological and structural characterizations

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

Synthesis and Properties of Photocatalysts

edited by Sulakshana Shenoy and

Chitiphon Chuaicham

submission deadline 25 Feb 2025 | 1 articles | Viewed by 1609 | Submission Open

Keywords: photocatalysts; synthesis; properties; band gap energy tuning; environmental remediation; energy conversion

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

Synthesis and Characterization of Oxide Nanoparticles

edited by

Adriana-Gabriela Schiopu

and

Laura Madalina Cursaru

submission deadline 25 Feb 2025 | Viewed by 145 | Submission Open

Keywords: oxide nanoparticles elaboration; emerging nanostructured materials; morphostructural characterization of nanoparticles; optical applications of nanoparticles; nanostructured thin films; antibacterial properties

(This special issue belongs to the Section Inorganic Crystalline Materials)

Advances in Heavy-Rare-Earth-Free or Lean Permanent Magnets

edited by Chaochao Pan, Tao Jiang and Baozhi Cui

submission deadline 27 Feb 2025 | Viewed by 58 | Submission Open

Keywords: permanent magnets; NdFeB magnets; heavy-rare-earth-free or lean; magnetic properties; critical materials

(This special issue belongs to the Section Inorganic Crystalline Materials)

Advances in New Functional Biomaterials for Medical Applications, Second Edition

edited by

Mădălina Simona Bălțatu

and

Petrica Vizureanu

submission deadline 28 Feb 2025 | 1 articles | Viewed by 712 | 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)

Advances in Computer-Aided Drug Design and Molecular Dynamics Simulations

edited by Xueping Hu,

William J Welsh

and Shaoqing Du

submission deadline 28 Feb 2025 | Viewed by 120 | Submission Open

Keywords: computer-aided drug design; molecular dynamics simulations; biomolecular crystals; structure-based drug design; virtual screening; quantitative structure– activity relationship; free energy calculations; multiscale simulations; enhanced sampling techniques; protein– ligand interactions

(This special issue belongs to the Section Biomolecular Crystals)

Special Issue of the Professional Committee of Key Materials and Technology for Electronic Components (PC-KMTEC)

edited by Feng Shi,

Wen Lei

and

Kang Du

submission deadline 28 Feb 2025 | Viewed by 33 | Submission Open

Keywords: microwave dielectric ceramics; ferroelectric ceramics; piezoelectric ceramics; thermoelectric ceramics; pyroelectric ceramics; sensitive ceramics; transparent ceramics

(This special issue belongs to the Section Polycrystalline Ceramics)

Bioprocessing-Inspired Fabrication of Materials

edited by

Kun Wang

submission deadline 28 Feb 2025 | Viewed by 26 | Submission Open

Keywords: bioprocessing-inspired fabrication; bioprocessing-inspired synthesis; structures and functions; biomineralization-inspired; photosynthesis-inspired; additive manufacturing; microscale additive manufacturing; nanoscale additive manufacturing; bioinspired materials; biostructures; bioproperties and bioperformance; enamel-like nanocomposites; calcium-based minerals; biomineralization of collagen fibrils; kinetics of mineral deposition; artificial mineralization; natural living organism-directed synthesis; protein- or organism-induced synthesis; physiological processes

(This special issue belongs to the Section Mineralogical Crystallography and Biomineralization)

Microstructure Evolution and Mechanical Properties of Steels

edited by

Lei Wang

and

Kehong Wang

submission deadline 1 Mar 2025 | Viewed by 195 | Submission Open

Keywords: steel; microstructure; materials characterization; mechanical Properties; additive manufacturing; welding; casting; numerical simulation

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

Rare Earths-Doped Materials (3rd Edition)

edited by

Maria Milanova

and

Martin Tsvetkov

submission deadline 10 Mar 2025 | 5 articles | Viewed by 4948 | Submission Open

Keywords: rare earth elements; single crystals; bulk crystals; nanocrystals; phosphors; composite materials; semiconductors; insulators

(This special issue belongs to the Section Inorganic Crystalline Materials)

Synthesis and Characterization of Ammonia Synthesis Catalysts

edited by Constantinos D. Zeinalipour-Yazdi

submission deadline 10 Mar 2025 | 2 articles | Viewed by 1997 | Submission Open

Keywords: ammonia synthesis; mechanism; DFT; screening; catalysis

(This special issue belongs to the Section Inorganic Crystalline Materials)

Aggregation, Nucleation and Crystallization—Second Edition

edited by

Vesselin Tonchev

submission deadline 10 Mar 2025 | Viewed by 43 | Submission Open

Keywords: nucleation; aggregation; crystallization; growth modes; growth morphologies and the transitions between them

(This special issue belongs to the Section Industrial Crystallization)

Welding and Joining of Metallic Materials: Microstructure and Mechanical Properties, 2nd Edition

edited by

Ali Khalfallah

and Reza Beygi

submission deadline 10 Mar 2025 | Viewed by 32 | Submission Open

Keywords: friction stir welding; laser welding; electron beam welding; hybrid welding; adhesive bonding; welding-based additive manufacturing (WAAM); gas metal arc welding (GMAW); gas tungsten arc welding (GTAW); shielded metal arc welding (SMAW); welding parameters and optimization; microstructure; post-weld heat treatment; grain structure; phase transformations; precipitates; defects; residual stresses; mechanical properties; non-destructive testing; fatigue analysis; fracture mechanics; weld integrity; reliability assessments

(This special issue belongs to the Section Hybrid and Composite Crystalline Materials)

Advances in Organic Semiconductors

edited by

Youngjun Yun

submission deadline 14 Mar 2025 | 2 articles | Viewed by 2748 | Submission Open

Keywords: small organic molecules/polymeric semiconductors; flexible/stretchable semiconductors; device physics; opto-electronic devices; molecular doping

(This special issue belongs to the Section Organic Crystalline Materials)

State of Art of Excitonic Insulator

edited by Selene Mor,

Igor Yurkevich

and

Qiang Zhang

submission deadline 15 Mar 2025 | Viewed by 272 | Submission Open

Keywords: inorganic crystal growth of new excitonic insulator candidates; layered semiconductors; 2D materials; electron– hole bilayers; electron correlations; collective modes; excitonic fluctuations and structural instabilities; photo-induced phenomena and non-equilibrium physics; steady-state and time-resolved ARPES; transient optical spectroscopy; (time-resolved) Raman spectroscopy; DFT calculations and mean-field theory

(This special issue belongs to the Section Inorganic Crystalline Materials)

Polymorphism in Crystals (2nd Edition)

edited by

Xin Huang

submission deadline 15 Mar 2025 | Viewed by 129 | Submission Open

Keywords: polymorphism; crystal engineering; crystal habit

(This special issue belongs to the Section Crystal Engineering)

Organic Optoelectronic Materials and Applications

edited by Junkai Liu and Bart Kahr

submission deadline 15 Mar 2025 | Viewed by 15 | Submission Open

Keywords: flexible optoelectronics; light-electricity interconversion; advanced device architectures; biocompatible probes; photo-driven theragnosis; crystal structure

(This special issue belongs to the Section Organic Crystalline Materials)

Synthesis, Crystal Structures and Hirshfeld Surface Analysis of Coordination Compounds (3rd Edition)

edited by

Waldemar Maniukiewicz

submission deadline 20 Mar 2025 | 2 articles | Viewed by 2361 | 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)

Porous Ceramics and Their Composite Materials

edited by

Chengying Bai

Hamada Elsayed

and Xinxin Jin

submission deadline 20 Mar 2025 | 1 articles | Viewed by 1401 | 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)

Electrocatalyst Design for the Reduction of Carbon Dioxide

edited by Zhen Zhang

submission deadline 20 Mar 2025 | Viewed by 302 | Submission Open

Keywords: CO2 reduction; electrocatalysts; nanomaterials; carbon conversion and utilization; electrochemistry; energy conversion; electrolyzer

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

Recent Trends in Laser Cladding and Surface Alloying

edited by

Tai-Cheng Chen

and Tai-Nan Lin

submission deadline 20 Mar 2025 | Viewed by 225 | 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

Junjie Shi

submission deadline 20 Mar 2025 | Viewed by 124 | 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)

Computational Research on Crystals

edited by

Łukasz Szeleszczuk

submission deadline 20 Mar 2025 | Viewed by 102 | Submission Open

Keywords: API; co-crystal; polymorphism; drug; medicine; DFT; molecular dynamics simulations; calculations; quantum chemistry; molecular docking; MM/GBSA; QM/MM; computations; molecular mechanics

(This special issue belongs to the Section Biomolecular Crystals)

Friction Stir Welding and Processing of Lightweight Alloys

edited by Fang Chai and