Crystal Research and Technology最新文献

Study on the Influence of Iron-Based Catalysts on the Planarization of GaN Wafers During Electro-Fenton Assisted CMP Polishing 电fenton辅助CMP抛光过程中铁基催化剂对GaN晶片平面化影响的研究

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-15 DOI: 10.1002/crat.70097

Wenjie Lv, Guomei Chen, Zifeng Ni, Shikun Zheng, Kai Chen, Xueyu Lu

{"title":"Study on the Influence of Iron-Based Catalysts on the Planarization of GaN Wafers During Electro-Fenton Assisted CMP Polishing","authors":"Wenjie Lv, Guomei Chen, Zifeng Ni, Shikun Zheng, Kai Chen, Xueyu Lu","doi":"10.1002/crat.70097","DOIUrl":"https://doi.org/10.1002/crat.70097","url":null,"abstract":"<div>\u0000 \u0000 Electro-Fenton assisted chemical mechanical polishing (CMP) has been demonstrated as an effective technique for enhancing the surface oxidation efficiency of gallium nitride (GaN) substrates, where the valence and phase states of iron-based catalysts directly determine the oxidation capability of the system. Herein, the effects of three types of iron-based catalysts (i.e., homogeneous ferrous sulfate (FeSO4), homogeneous iron sulfate (Fe2(SO4)3), and heterogeneous ferroferric oxide (Fe3O4)) on the performance of electro-Fenton assisted GaN CMP were systematically investigated. ·OH generation kinetics and the formation behavior of the oxide layer were comprehensively characterized through fluorescence spectrophotometry, potentiodynamic polarization tests, and X-ray photoelectron spectroscopy (XPS). Iron cycling mechanisms in the electro-Fenton system were examined through elemental analysis of iron deposition on GaN surfaces. Experimental results indicated significant differences in polishing performance among the catalyst systems, with clear linear relationships observed among ·OH concentration, corrosion potential, and material removal rate (MRR). Based on these findings, an oxidation kinetics model of the GaN surface was established to elucidate the origin of these linear correlations.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solution Growth and Optical Properties of Lead-Free Single MACu2I3 Crystals with 1D Structure 一维结构无铅MACu2I3单晶的溶液生长和光学性质

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-14 DOI: 10.1002/crat.70099

Hanning Zou, XinXin Chen, Jiali Han, Can Chen, Yizhe Hu, Shangke Pan, Jianguo Pan

{"title":"Solution Growth and Optical Properties of Lead-Free Single MACu2I3 Crystals with 1D Structure","authors":"Hanning Zou, XinXin Chen, Jiali Han, Can Chen, Yizhe Hu, Shangke Pan, Jianguo Pan","doi":"10.1002/crat.70099","DOIUrl":"https://doi.org/10.1002/crat.70099","url":null,"abstract":"<div>\u0000 \u0000 Lead halide perovskite has attracted extensive attention in the field of photoelectric conversion and detection due to its excellent photoelectric properties. However, the toxicity of lead and environmental pollution will affect the practical application. By substituting Cu+ for Pb2+ and MA+ for Cs+, a new organic–inorganic hybrid copper (I) halide MACu2I3 single crystal with 1D structure was successfully prepared by slow evaporation of solvent. The results show that the crystal belongs to the monoclinic system (P21/m), and the MACu2I3 single crystal is a direct band gap material with a direct band gap of 2.09 eV. The photoluminescence spectrum shows that the excitation peak of the MACu2I3 crystal is 330 nm, and the emission peaks are 415 and 610 nm, respectively, with the corresponding fluorescence decay times being 0.21 and 329 ns, indicating that the MACu2I3 single crystal exhibits ultrafast luminescence decay behavior. Therefore, this work highlights the potential of the MACu2I3 single crystal in the field of ultrafast optics.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Raman Observation of the Chemical State of Ru/CeO2 Catalysts Ru/CeO2催化剂化学状态的拉曼观察

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-10 DOI: 10.1002/crat.70096

Oleksii Bezkrovnyi, Maciej Ptak, Mirosława Pawlyta, Michael Vorochta, Iva Matolínová

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Crystal Structure, Thermal Stability, Supercapacitor, and Nonlinear Optical Behavior in β-Alanine Sodium Nitrate Crystals β-丙氨酸硝酸钠晶体的晶体结构、热稳定性、超级电容器和非线性光学行为

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-09 DOI: 10.1002/crat.70095

V. Mamitha, S. Lincy Mary Ponmani, S. C. Vella Durai

{"title":"Crystal Structure, Thermal Stability, Supercapacitor, and Nonlinear Optical Behavior in β-Alanine Sodium Nitrate Crystals","authors":"V. Mamitha, S. Lincy Mary Ponmani, S. C. Vella Durai","doi":"10.1002/crat.70095","DOIUrl":"10.1002/crat.70095","url":null,"abstract":"<div>\u0000 \u0000 β-Alanine sodium nitrate mixed single crystals were successfully grown using the slow evaporation solution growth technique and systematically examined for multifunctional applications. Single-crystal X-ray diffraction analysis confirmed the crystalline nature, phase purity, and good structural perfection of the grown crystals. FTIR spectroscopy was used to identify the characteristic vibrational frequencies corresponding to the functional groups present in the crystal lattice. The elemental composition and chemical purity were validated through Energy Dispersive X-ray Analysis (EDAX). Scanning electron microscopy revealed well-defined crystalline morphology with smooth facets and uniform distribution, indicating high crystal quality and the absence of significant surface defects. Optical properties were investigated using UV–Vis–NIR spectroscopy, and the optical band gap was determined. The observed wide band gap confirms the suitability of the material for optoelectronic device applications. Thermal stability was assessed by thermogravimetric analysis (TGA) and differential thermal analysis (DTA), showing stability up to 150°C. Electrochemical studies demonstrated high specific capacitance with stable charge–discharge behavior. Third-order nonlinear optical parameters (χ3, n2, and β), determined using the Z-scan technique, revealed a strong nonlinear response and effective optical limiting behavior, highlighting the potential of β-alanine sodium nitrate crystals for optoelectronic, energy storage, and nonlinear photonic applications.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Issue Information: Crystal Research and Technology 4'2026 发行信息：晶体研究与技术4'2026

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-03-31 DOI: 10.1002/crat.70098

引用次数: 0

Temperature-Modulated Nanoarchitectonics on the Electrochemical Performance of High Energy Supercapacitor Electrodes Derived From Mango Seeds 温度调制纳米结构对芒果籽制备的高能超级电容器电极电化学性能的影响

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-03-31 DOI: 10.1002/crat.70094

Gokulapriya Baskar, Gokul Jayavel, Suji Saravanan, Selvapandiyan Marimuthu

{"title":"Temperature-Modulated Nanoarchitectonics on the Electrochemical Performance of High Energy Supercapacitor Electrodes Derived From Mango Seeds","authors":"Gokulapriya Baskar, Gokul Jayavel, Suji Saravanan, Selvapandiyan Marimuthu","doi":"10.1002/crat.70094","DOIUrl":"10.1002/crat.70094","url":null,"abstract":"<div>\u0000 \u0000 Biomass-derived activated carbon are emerging as a sustainable electrode for high-performance supercapacitors. Mango seed-derived activated carbon was synthesized using chemical activation with H3PO4 as an activating agent. Brunauer Emmett Teller (BET) analysis of MSAC@800 revealed a high specific surface area of 818 m2/g, providing abundant active sites for ion adsorption. XRD and Raman analyses confirmed that the activated carbon is partially graphitized structure, which improves the electrical conductivity. FE—SEM showed a well-developed porous structure that facilitates efficient ion transport. Fourier Transform Infrared (FTIR) analysis confirmed the presence of a functional group that enhances the electrochemical performance. MSAC@800 electrode exhibited a specific capacitance of 336.94 ± 0.16 F/g and an energy density of 46.76 ± 0.09 Wh/kg at a current density of 2 A/g. The capacitive-controlled contribution reached 85 %, this enhancing the overall capacitance and energy storage. This study demonstrates that mango seed-derived activated carbon is a cost-effective and high-performance electrode material for supercapacitor applications.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147669000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Y2O3 Addition on the Microstructure and Mechanical Properties of Additive Manufactured Ti6Al4V 添加Y2O3对添加剂制备Ti6Al4V显微组织和力学性能的影响

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-03-31 DOI: 10.1002/crat.70091

Jinyu Zhu, Yangping Dong, Huihua Zhang, Renyi Lu, Wentian Zhao, Shuming Zhao, Pengwei Yang, Guang Yang, Lei Cao, Xin Zhang, Qun Zhang, Liang Zhong

{"title":"Influence of Y2O3 Addition on the Microstructure and Mechanical Properties of Additive Manufactured Ti6Al4V","authors":"Jinyu Zhu, Yangping Dong, Huihua Zhang, Renyi Lu, Wentian Zhao, Shuming Zhao, Pengwei Yang, Guang Yang, Lei Cao, Xin Zhang, Qun Zhang, Liang Zhong","doi":"10.1002/crat.70091","DOIUrl":"10.1002/crat.70091","url":null,"abstract":"<div>\u0000 \u0000 Laser powder bed fusion (LPBF)-fabricated Ti6A4V alloys often suffer from insufficient comprehensive mechanical properties and pronounced anisotropy. In contrast, the introduction of rare earth elements offers a promising approach to performance optimization. In this study, Ti6Al4V-xY2O3 alloys were produced by incorporating different mass fractions of Y2O3 particles into Ti6Al4V powder, followed by LPBF processing, and their microstructural characteristics and mechanical properties were systematically investigated. The results show that the addition of 0.2 wt.% Y2O3 induces significant grain refinement, reducing the β grain size from 92.3 to 60.4 µm and the α′ martensitic lath size from 10.4 to 8.6 µm. At this composition, the alloy achieves an optimal combination of mechanical properties, with the yield strength increased from 1126 to 1208 MPa and the ultimate tensile strength from 1259 to 1331 MPa. This study provides new insights and experimental evidence for tailoring the microstructure and enhancing the mechanical performance of LPBF-processed titanium alloys via rare-earth oxide modification.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crystal Structure Prediction of a Low-Symmetry Molecular Crystal (P1, Z = Z′ = 1) Using Periodic DFT and Cubic Starting Cells: A Case Study on 1-{4-[(prop-2-yn-1-yl)oxy]phenyl}ethan-1-one 低对称分子晶体（P1, Z = Z′= 1）的周期DFT和立方起始单元晶体结构预测——以1-{4-[（prop-2-yn-1-基）氧]苯基}-1- 1为例

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-03-31 DOI: 10.1002/crat.70093

Łukasz Szeleszczuk, Dariusz Maciej Pisklak

{"title":"Crystal Structure Prediction of a Low-Symmetry Molecular Crystal (P1, Z = Z′ = 1) Using Periodic DFT and Cubic Starting Cells: A Case Study on 1-{4-[(prop-2-yn-1-yl)oxy]phenyl}ethan-1-one","authors":"Łukasz Szeleszczuk, Dariusz Maciej Pisklak","doi":"10.1002/crat.70093","DOIUrl":"10.1002/crat.70093","url":null,"abstract":"<div>\u0000 \u0000 Predicting the crystal structure of low-symmetry molecular crystals without experimental input is a challenging task, especially for systems with space group P1 and a single molecule in the unit cell (Z = Z′ = 1). In this study, we explore a simple yet effective crystal structure prediction (CSP) strategy using periodic density functional theory (DFT) with the PBE functional and three dispersion corrections—Tkatchenko–Scheffler (TS), Many-Body Dispersion (MBD*), and DFT-D4. As a case study, we investigate 1-{4-[(prop-2-yn-1-yl)oxy]phenyl}ethan-1-one, a molecule with four conformations and an experimental crystal structure (CCDC refcode ZOWZAP). Each conformation was placed in a cubic unit cell with varying initial edge lengths and fully optimized in CASTEP using the LBFGS minimizer, allowing simultaneous relaxation of lattice parameters and atomic coordinates. Results show that the choice of dispersion correction and initial cell dimensions critically influences prediction success. The DFT-D4 method provided the closest agreement with the experimental structure, correctly identifying the experimentally observed conformation as the lowest-energy arrangement in most cases. The study highlights the feasibility of a minimal-input CSP workflow for P1, Z = Z′ = 1 molecular crystals, offering a reproducible approach for systems where experimental diffraction data are unavailable or challenging to obtain.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, Optical, and Electrical Studies of Maleic Acid Single Crystals for Nonlinear Optical Applications 非线性光学应用中马来酸单晶的结构、光学和电学研究

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-03-31 DOI: 10.1002/crat.70090

Alexandar Antonysamy, Sahaya Infant Lasalle Britto, Muthu Senthil Pandian, Johnson Irudayaraj, Renuka Navaneethan, Shabbir Muhammad

{"title":"Structural, Optical, and Electrical Studies of Maleic Acid Single Crystals for Nonlinear Optical Applications","authors":"Alexandar Antonysamy, Sahaya Infant Lasalle Britto, Muthu Senthil Pandian, Johnson Irudayaraj, Renuka Navaneethan, Shabbir Muhammad","doi":"10.1002/crat.70090","DOIUrl":"10.1002/crat.70090","url":null,"abstract":"<div>\u0000 \u0000 Single crystals of maleic acid (MA) were synthesized and thoroughly characterized to evaluate their structural and various technical characterizations. The nucleation and growth behavior were monitored and recorded via optical microscopy for a better understanding of the crystallization process. PXRD established the crystalline phase and purity of the material, while FTIR spectrographic analysis revealed the existence of functional assemblies, offering insight into molecular interactions within the crystal lattice. UV–vis NIR spectral examination demonstrated good optical transparency, suggesting the crystal's potential for optoelectronic applications. Dielectric measurements provided information on the dielectric constant and loss, which are important for its integration into electronic devices. The photoconductivity study revealed a photo-responsive electrical behavior, and impedance spectroscopy offered valuable data on the charge transport dynamics. Additionally, electrochemical analysis was performed to examine the crystal's stability and reactivity. Importantly, Z-scan measurements confirmed the presence of significant third-order NLO behavior, underscoring its use in advanced photonic and laser-based systems. Overall, these comprehensive characterizations highlight the versatility of maleic acid single crystals for a wide range of NLO and functional device applications.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Fe2+, Zn2+, and Ca2+ on the Solvent-Mediated Phase Transformation of Glycine Fe2+、Zn2+和Ca2+对甘氨酸溶剂介导相变的影响

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-03-31 DOI: 10.1002/crat.70089

Sevgi Polat, Ayşe Öykü Yıldız, Perviz Sayan

{"title":"Effect of Fe2+, Zn2+, and Ca2+ on the Solvent-Mediated Phase Transformation of Glycine","authors":"Sevgi Polat, Ayşe Öykü Yıldız, Perviz Sayan","doi":"10.1002/crat.70089","DOIUrl":"10.1002/crat.70089","url":null,"abstract":"<div>\u0000 \u0000 This study investigated the effects of iron, zinc, and calcium ions (Fe2+, Zn2+, and Ca2+, respectively) on the solvent-mediated polymorphic transformation of glycine and subsequent crystal properties. The transformation from β- into α-glycine was monitored in real time using ultrasonic velocity measurements and revealed that these metal ions delayed the transformation in a concentration-dependent manner, with Fe2+ showing the strongest delay. x-ray diffraction and microscopy analyses confirmed the complete transformation into α-glycine, with significant morphology changes induced by the additives. Scanning electron microscopy and image-based analyses showed that Fe2+ led to compact, agglomerated crystals with irregular shapes, while Zn2+ and Ca2+ caused moderate thickening of the rod-like α-glycine crystals. Zeta potential measurements demonstrated metal ion adsorption on crystal surfaces, reducing surface charge and promoting agglomeration, particularly in the Fe2+ system. Filtration tests revealed a sharp increase in specific cake resistance with Fe2+, while Zn2+ and Ca2+ improved filtration performance. Thermogravimetric analysis and in-situ Fourier transform infrared spectroscopy analyses confirmed a consistent two-step thermal degradation pattern across all samples, with minor variations in decomposition temperatures and evolved gas profiles.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0