Crystal Research and Technology最新文献_第6页

Elimination of Edge Defects in SiC Crystals Grown Through Physical Vapor Transport Method 物理气相输运法生长SiC晶体边缘缺陷的消除

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-04-21 DOI: 10.1002/crat.202500028

Jingcheng Feng, Hao Xue, Gang Dong, Yujian Wang, Chengyuan Sun, Yunfei Shang, Zuotao Lei, Dalei Meng, Chunhui Yang, Yingmin Wang

引用次数: 0

Issue Information: Crystal Research and Technology 4'2025 发行信息：晶体研究与技术4'2025

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-04-09 DOI: 10.1002/crat.1574

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Nucleation Control and Separation of Ethyl Maltol Polymorphs II and III from Water-Ethanol Solvent Mixtures 水-乙醇混合物中乙基麦芽醇多形物II和III的成核控制和分离

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-04-07 DOI: 10.1002/crat.202400274

Anitha Thirumalaisamy, Srinivasan Karuppannan

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On the Existence of Triglycine Acetate, Triglycine Phosphate, Triglycine Oxalate and Triglycine Formate 论乙酸甘油三酯、磷酸甘油三酯、草酸甘油三酯和甲酸甘油三酯的存在

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-04-07 DOI: 10.1002/crat.202400210

Aram M. Petrosyan, Bikshandarkoil R. Srinivasan

{"title":"On the Existence of Triglycine Acetate, Triglycine Phosphate, Triglycine Oxalate and Triglycine Formate","authors":"Aram M. Petrosyan, Bikshandarkoil R. Srinivasan","doi":"10.1002/crat.202400210","DOIUrl":"https://doi.org/10.1002/crat.202400210","url":null,"abstract":"The authors of a recent paper (Cryst. Res. Technol. 2022, 57, 2100130) report to have grown crystals of triglycine acetate (TGAc) by slow evaporation of an aqueous solution containing glycine and acetic acid in 3:1 molar ratio. The infrared spectrum and unit cell data of the so-called TGAc crystal confirm that it is, in fact, α-glycine. The non-formation of any TGAc is due to no chemical reaction occurring between glycine and acetic acid. Another publication (Cryst. Res. Technol. 2022, 57, 2100262) describes the growth and characterization of a so-called triglycine oxalate (TGO) crystal. The unit cell data and infrared spectrum of the TGO crystal reveal that the crystal grown is, in fact, the well-known glycinium hydrogen oxalate. A critical analysis of the publications reporting on the growth of triglycine phosphate (TGP) and triglycine formate (TGF) crystals reveals that these are not what the authors claim them to be. Despite their names, the TGAc or TGP or TGO or TGF crystals are not analogs of the triglycine sulfate (TGS) crystal but serve as examples to highlight the importance of single-crystal structure refinement to avoid improper characterization.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 6","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256220","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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Investigating the Influence of Morphologies and Structural Modifications on the Photoelectric Properties of TiOPc for Improved Photodetection 研究形貌和结构修饰对TiOPc光电性能的影响以改进光探测

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-04-01 DOI: 10.1002/crat.202400247

Yanshu Shi, Mengke Guo, Yiqian Wang, Xuekun Wang, Jile Wang, Xiaoyun Qin, Yumin Song, Tingting Guo

{"title":"Investigating the Influence of Morphologies and Structural Modifications on the Photoelectric Properties of TiOPc for Improved Photodetection","authors":"Yanshu Shi, Mengke Guo, Yiqian Wang, Xuekun Wang, Jile Wang, Xiaoyun Qin, Yumin Song, Tingting Guo","doi":"10.1002/crat.202400247","DOIUrl":"https://doi.org/10.1002/crat.202400247","url":null,"abstract":"The unique morphology and structure significantly enhance the performance of photoelectric detection. Herein, titanyl phthalocyanine (TiOPc) coarse crystal and microspheres are obtained by a simple physical vapor deposition (PVD) method designed to produce TiOPc structures that undergo significant changes in the crystal structure. The photoelectric experimental results show that the photocurrent of TiOPc coarse crystal and microspheres increases with the increase of voltage and exhibits better stability compared to the raw materials. Under a bias voltage of 10 V, the photoresponsivity of microspheres reaches the maximum, which is 77 times that of raw materials. Under different monochromatic lights, the raw materials are most sensitive to red light (850 nm), with a photocurrent of 1.3556 × 10−6 mA, but the coarse crystal/microspheres are most sensitive to blue light (455 nm) with photocurrents of 1.281 × 10−5 mA/2.609 × 10−5 mA, respectively. It is worth mentioning that although the photocurrent and responsivity of coarse crystal are slightly lower than those of microspheres, the response speed is faster, with a rise/fall time is 271 and 194 ms, respectively. The good photoelectric properties indicate the potential research value of TiOPc coarse crystal and microspheres in the field of photoelectric detection.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930273","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

Research Progress and Prospect of the Bulk Single Crystal Growth of β-Ga2O3: from 1964 to 2024 β-Ga2O3块状单晶生长的研究进展与展望：1964 ~ 2024年

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-04-01 DOI: 10.1002/crat.202400255

Xueyi Wang, Xi Chang, Ping Wang, Xiaotian Yang, Long Yuan

{"title":"Research Progress and Prospect of the Bulk Single Crystal Growth of β-Ga2O3: from 1964 to 2024","authors":"Xueyi Wang, Xi Chang, Ping Wang, Xiaotian Yang, Long Yuan","doi":"10.1002/crat.202400255","DOIUrl":"https://doi.org/10.1002/crat.202400255","url":null,"abstract":"β-Ga2O3 is a promising wide band gap material for power device and solar-blind photodector applications. With continuous contribution to the crystal growth of β-Ga2O3, it is important to conclude the progress of crystal growth techniques and the remaining problems of the materials propel the next generation of the power device industry. The size of single crystals becomes larger, the quality of epitaxial films is gradually improved, and the performance of devices has become better. β-Ga2O3 is an oxide semiconductor with a large bandgap width of 4.7–4.9 eV and a high breakdown electric field of ≈8 MV cm−1. In this review, the structure, thermal properties, optical properties, and electronic properties of β-Ga2O3 are introduced first. Then, the growth methods of bulk β-Ga2O3 single crystals are introduced, including the Verneuil method, Czochralski (CZ) method, optical-floating zone (OFZ) method, edge-defined film-fed growth (EFG) method, vertical Bridgman (VB) method, casting method, and the oxide crystal growth from cold crucible (OCCC) method. Crystal growth mechanisms and their respective advantages and disadvantages are discussed. The effects of doping elements on the crystal growth have been highlighted in each method. Finally, the prospect of the growth of large β-Ga2O3 single crystals is discussed.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 6","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256377","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

Switchable Behavior and Applications of Low-Dimensional Halide Perovskites under External Environmental Stimuli 低维卤化物钙钛矿在外界环境刺激下的转换行为及其应用

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-04-01 DOI: 10.1002/crat.202400251

Ruirui Wu, Shunfa Gong, Yijun Wu, Zhiyuan Ren, Huan Liu, Daniela Marongiu, Michele Saba, Rui Chen

{"title":"Switchable Behavior and Applications of Low-Dimensional Halide Perovskites under External Environmental Stimuli","authors":"Ruirui Wu, Shunfa Gong, Yijun Wu, Zhiyuan Ren, Huan Liu, Daniela Marongiu, Michele Saba, Rui Chen","doi":"10.1002/crat.202400251","DOIUrl":"https://doi.org/10.1002/crat.202400251","url":null,"abstract":"The flexibility and adaptability of low-dimensional halide perovskites make them ideal candidates for a wide range of cutting-edge technologies. In addition to their primary applications in photovoltaics, they have recently attracted attention for their potential use in switchable technologies such as smart windows, encrypted messages, and sensors. The interest stems from their switchable properties, which enable them to change their physical properties, in particular photoluminescence and crystal color, in response to external stimuli such as heat, light, pressure, and humidity. This review examines their switchable properties and explores their practical applications in a number of emerging chromic technologies. This paper also provides an in-depth analysis of the reversibility, switchable optical and electrical properties of low-dimensional halide perovskites, and the switching mechanisms involved in the transformations they undergo. In addition, the paper is classified according to different switching mechanisms. To assist the research community in developing new designs for new switchable low-dimensional perovskites, some basic criteria for effective switching materials are outlined here. Finally, the current challenges facing these emerging materials are discussed, and an outlook on future developments and potential breakthroughs in this promising area of research is provided.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930272","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

Optimizing Crystallite Size of Synthesized PbS Nanoparticles Using Response Surface Methodology 利用响应面法优化合成PbS纳米颗粒的晶粒尺寸

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-03-17 DOI: 10.1002/crat.202400220

Bappaditya Chatterjee, Amitava Bandyopadhyay

{"title":"Optimizing Crystallite Size of Synthesized PbS Nanoparticles Using Response Surface Methodology","authors":"Bappaditya Chatterjee, Amitava Bandyopadhyay","doi":"10.1002/crat.202400220","DOIUrl":"https://doi.org/10.1002/crat.202400220","url":null,"abstract":"Lead sulfide (PbS) nanoparticles are used in gas sensing for which it is necessary to achieve smaller PbS crystallite sizes. However, the operating conditions to produce the minimum size of PbS nanoparticles do not seem to be reported so far. In this light, this article discusses the synthesis of PbS nanoparticles using the Response Surface Methodology (RSM) choosing the face-centered central composite design (FC-CCD) for which a total of 20 (twenty) experiments are required to be conducted. X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) are used for synthesized PbS samples’ characterization. The smallest PbS crystallite size, as reveals from XRD analysis, is 14.11 nm. All samples' FTIR spectra verified the distinctive peaks of PbS phase. PbS nanoparticle formation is visible in the SEM images. A reduced quadratic polynomial model as obtained from the optimization is found to be accurate. An experiment carried out under optimum conditions confirms the model’s validity in obtaining PbS nanoparticles' crystallite size of 15.62 nm (deviation = + 3.24 %). It can be concluded that the methodology demonstrated in this article could can be applied to synthesize PbS nanoparticles with a minimum crystallite size for use as gas sensors.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930469","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

Antisolvent Crystallization for the Size Reduction of Cholecalciferol: Parametric and Optimization Study 抗溶剂结晶法降低胆骨化醇粒径：参数化及优化研究

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-03-17 DOI: 10.1002/crat.202400233

Neha Bollineni, Souptik Pal, Krupaben Nanjibhai Vaghamshi, Akash D. Patel, Meghal A. Desai

{"title":"Antisolvent Crystallization for the Size Reduction of Cholecalciferol: Parametric and Optimization Study","authors":"Neha Bollineni, Souptik Pal, Krupaben Nanjibhai Vaghamshi, Akash D. Patel, Meghal A. Desai","doi":"10.1002/crat.202400233","DOIUrl":"https://doi.org/10.1002/crat.202400233","url":null,"abstract":"The active form of vitamin D3, cholecalciferol, is one of the essential constituents that allows most cells to develop and differentiate, and also critical for parathyroid regulation and immune system improvement. Reducing the size of cholecalciferol can offer several benefits, such as improved surface area, enhanced biological activity, and better penetrating power. In this context, antisolvent crystallization is utilized to decrease the particle size of cholecalciferol. The solvent and antisolvent selections are made using Hansen solubility parameters (HSP). The effect of various factors like ratio of antisolvent to solvent (1:1–20:1, v/v), rate of addition (5–40, mL h−1), stirring speed (200–500 rpm), concentration of cholecalciferol (2.5–15, mg mL−1), and temperature (15–30 °C) is assessed using parametric study. The individual and interaction effects are studied using the central composite design (CCD) followed by model formulation and optimization. The lowest particle size (111.6 nm) is obtained at 2.5 mg mL−1 concentration of cholecalciferol, 25 mL h−1 rate of addition, 10:1 (v/v) antisolvent to solvent ratio, 20 °C temperature, and stirring speed of 300 rpm.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 5","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930470","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 3'2025 发行信息：晶体研究与技术3’2025

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-03-11 DOI: 10.1002/crat.1562

引用次数: 0