Crystal Research and Technology最新文献_第9页

Impact of RF Sputtering Power on AZO Thin Films for Flexible Electro‐Optical Applications 射频溅射功率对柔性电光用AZO薄膜的影响

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-03-15 DOI: 10.1002/crat.202000144

V. Rana, Jeevitesh K. Rajput, T. K. Pathak, P. K. Pal, L. P. Purohit

{"title":"Impact of RF Sputtering Power on AZO Thin Films for Flexible Electro‐Optical Applications","authors":"V. Rana, Jeevitesh K. Rajput, T. K. Pathak, P. K. Pal, L. P. Purohit","doi":"10.1002/crat.202000144","DOIUrl":"https://doi.org/10.1002/crat.202000144","url":null,"abstract":"In the present work, fixed Al (2.5 wt%) doped zinc oxide (ZnO) thin films are fabricated at different radio frequency (RF) power on indium doped tin oxide‐coated polyethylene terephthalate substrate by sputtering techniques. From the X‐ray diffraction (XRD) results it has been observed that all thin films have polycrystalline nature with hexagonal structure. Stress of thin film calculated from XRD measurement is increased from −0.10 × 109 to 0.23 × 109 N m−2 with increase in RF sputtering power. The morphology analyzed by field electron microscopy is observed as irregular sphere for all samples. The estimated values of thickness are 440, 870, 913, and 1086 nm for the films grown at RF sputtering powers 130, 140, 150, and 160 W, respectively. On increasing the RF power from 130 to 160 W, the optical bandgap is decreased from 3.59 to 3.48 eV. The highest conductivity obtained is 2.43 × 102 S m−1 for the sample grown at sputtering power 160 W. The study reveals that there is an impact of sputtering power on the various properties of thin films grown on flexible substrates and these films have wide applications in flexible electro‐optical applications.","PeriodicalId":10797,"journal":{"name":"Crystal Research and Technology","volume":"8 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90038009","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: 4

Li‐Ion Intercalated Exfoliated WS2 Nanosheets with Enhanced Electrocatalytic Hydrogen Evolution Performance 锂离子插层剥脱WS2纳米片的电催化析氢性能

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-03-01 DOI: 10.1002/crat.202000165

L. Tian, H. Qiao, Zongyu Huang, X. Qi

{"title":"Li‐Ion Intercalated Exfoliated WS2 Nanosheets with Enhanced Electrocatalytic Hydrogen Evolution Performance","authors":"L. Tian, H. Qiao, Zongyu Huang, X. Qi","doi":"10.1002/crat.202000165","DOIUrl":"https://doi.org/10.1002/crat.202000165","url":null,"abstract":"Tungsten disulfide (WS2) as a 2D layered material shows good application in the field of electrocatalysis due to its unique 2D structure, excellent electronic properties, and catalytic activity. However, the electrocatalytic performance of bulk WS2 materials is limited due to the lack of active sites. Hence, a few layers of WS2 nanosheets are prepared by a simple method of lithium (Li)‐ion intercalation exfoliation, and enhanced electrocatalytic hydrogen evolution performance is demonstrated compared to bulk WS2. This method can not only realize the large‐scale preparation of WS2 nanosheets, but also the obtained WS2 nanosheets have a larger lateral size, a good lattice structure, and no chemical impurities remain. Most importantly, it is realized that the reduction in the thickness of WS2 nanosheets will generate additional active sites from the ultrathin planar structure, thereby improving electrocatalytic activity. The exfoliated WS2 nanosheets show a smaller overpotential compared to the bulk WS2, the overpotential is about 320 mV at 10 mA cm–2. This work shows that Li‐ion intercalation exfoliated method is an efficient strategy to prepare 2D nanosheets materials and effectively improve its electrocatalytic performance.","PeriodicalId":10797,"journal":{"name":"Crystal Research and Technology","volume":"82 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75679223","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: 6

Masthead: Crystal Research and Technology 3'2021 报头:晶体研究与技术3'2021

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-03-01 DOI: 10.1002/crat.202170015

引用次数: 0

Effect of Atomic Oxygen and Electron Irradiation on the Electronic Structure of KTiOPO4 Crystal 原子氧和电子辐照对KTiOPO4晶体电子结构的影响

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-02-12 DOI: 10.1002/crat.202000175

Jian Liu, Yan Lu, Junying Hao

引用次数: 1

Theoretical Study on the Effect of Solvent Behavior on Ammonium Dinitramide (ADN)/1,4,7,10,13,16‐Hexaoxacyclooctadecane (18‐Crown‐6) Cocrystal Growth Morphology at Different Temperatures 不同温度下溶剂行为对二酰胺铵(ADN)/1,4,7,10,13,16‐六氧环十六烷(18‐Crown‐6)共晶生长形貌影响的理论研究

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-02-12 DOI: 10.1002/crat.202000203

Honglu Xie, Rui‐jun Gou, Shuhai Zhang

{"title":"Theoretical Study on the Effect of Solvent Behavior on Ammonium Dinitramide (ADN)/1,4,7,10,13,16‐Hexaoxacyclooctadecane (18‐Crown‐6) Cocrystal Growth Morphology at Different Temperatures","authors":"Honglu Xie, Rui‐jun Gou, Shuhai Zhang","doi":"10.1002/crat.202000203","DOIUrl":"https://doi.org/10.1002/crat.202000203","url":null,"abstract":"The cocrystal of ammonium dinitramide (ADN)/1,4,7,10,13,16‐hexaoxacyclooctadecane (18‐Crown‐6) has effectively reduced the hygroscopicity of ADN. In order to understand the effect of solvent on the crystal growth, the interfacial models of ADN/18‐Crown‐6–ethanol are built and simulated by the molecular dynamics (MD) method at different temperatures (293–323 K, 10 K intervals). The energy, mass density, radial distribution function, and diffusion capacity of solvent are analyzed. The modified attachment energy (MAE) model is employed to study the solvent effect on cocrystal morphology. Results of MD simulation show that ADN/18‐Crown‐6 cocrystal has four important growth surfaces in vacuum, i.e., (2 0 0), (0 0 2), (1 1 0), and (2 0 −2). The binding energy of cocrystal and the absorbed energy of cocrystal–solvent are larger at 293 K than other temperatures. Hydrogen bonding interactions are formed between ADN/18‐Crown‐6 and solvent. More ethanol molecules adsorb on the crystal surface at lower temperatures, and hence the interaction between cocrystal and solvent is stronger. The morphology of ADN/18‐Crown‐6 cocrystal is different at various temperatures. The predicted morphology at 303 K is consistent with experimental shape. Moreover, cocrystal morphology at 293 K is a sphere‐like shape, which may reduce the hygroscopicity of ADN/18‐Crown‐6 cocrystal.","PeriodicalId":10797,"journal":{"name":"Crystal Research and Technology","volume":"32 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89756740","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: 9

Growth Kinetics Analysis and Morphological Characterization by Electron Microscopy of Anhydrous Uric Acid Crystals 无水尿酸晶体生长动力学分析及电镜形态表征

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-02-10 DOI: 10.1002/crat.202000164

Jesús Chávez‐Reyes, Eduardo Hernández-Cuellar, H. A. González-Ponce, M. G. Rodríguez

引用次数: 0

Prediction of Particle Number Density in Suspension by Measuring the Sizes of Bubbles Generated During Microwave Irradiation 通过测量微波辐照过程中产生的气泡大小来预测悬浮液中的颗粒数密度

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-02-08 DOI: 10.1002/crat.202000160

Y. Asakuma, A. Shibatani, Haruka Kan, A. Saptoro

引用次数: 1

Photoluminescence Mechanism in Heavily Si‐Doped GaAsN 重Si掺杂GaAsN的光致发光机理

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-02-08 DOI: 10.1002/crat.202000143

Takashi Tsukasaki, Ren Hiyoshi, M. Fujita, T. Makimoto

引用次数: 2

Modulation on Radiative Recombination Rate of CdS Nanobelts by Selective Rare Earth Ions 选择性稀土离子对CdS纳米带辐射复合速率的调制

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-02-08 DOI: 10.1002/crat.202000170

Xu Ji, Shuang Cheng

引用次数: 0

Self‐Assembly Method for Insensitive DAAF/FOX‐7 Composite Crystals with Microspheres Structure 微球结构不敏感DAAF/FOX - 7复合晶体的自组装方法

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2021-02-08 DOI: 10.1002/crat.202000194

Shujie Liu, Bidong Wu, Jia-ni Xie, Zhimin Li, Chongwei An, Jingyu Wang, Xiaodong Li

{"title":"Self‐Assembly Method for Insensitive DAAF/FOX‐7 Composite Crystals with Microspheres Structure","authors":"Shujie Liu, Bidong Wu, Jia-ni Xie, Zhimin Li, Chongwei An, Jingyu Wang, Xiaodong Li","doi":"10.1002/crat.202000194","DOIUrl":"https://doi.org/10.1002/crat.202000194","url":null,"abstract":"Highly efficient design for the formulation of explosives is desired for accelerating the development of energetic materials. These investigations are focused on the preparation of the compounds 3,3′‐diamino‐4,4′‐azoxyfurazan (DAAF) and 1,1‐diamino‐2,2‐dinitroethylene (FOX‐7). DAAF/FOX‐7 microspheres are prepared via the self‐assembly method using different mass ratios of DAAF and FOX‐7. Materials Studio is used to analyze the intermolecular binding energy (Ebind) of the composite system. DAAF/FOX‐7 with a mass ratio of 90:10 shows a higher Ebind (183.24 kJ mol−1) and peak temperature at the heating rate of 0 °C min−1 (266.2 °C) than DAAF/FOX‐7 with a mass ratio of 70:30 and DAAF/FOX‐7 with a mass ratio of 80:20; this indicates that DAAF/FOX‐7 (90:10) shows better thermal stability. EXPLO5 is used to analyze the detonation velocity of the composite system, and the detonation velocity of DAAF/FOX‐7 microspheres increase by 0.5 km s−1 compared to that of DAAF. The characteristic drop height of impact sensitivity is more than 100 cm, and this demonstrates that the microspheres exhibit good safety performance. The morphology, crystal structure, thermal decomposition property, and impact sensitivity of the microspheres are investigated and compared. X‐ray diffraction and Fourier transform infrared spectroscopy results indicate that the structure of the DAAF/FOX‐7 composite is not changed compared to that of the raw material.","PeriodicalId":10797,"journal":{"name":"Crystal Research and Technology","volume":"7 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82204499","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: 4