Nanomaterials and Energy最新文献_第3页

Influence investigation of the melt track geometry during selective laser melting of CuSn10 CuSn10选择性激光熔化过程中熔化轨迹几何形状的影响研究

IF 1.1

Nanomaterials and Energy Pub Date : 2023-06-01 DOI: 10.1680/jnaen.23.00008

F. Foadian, A. T. Tabrizi, R. Kremer, H. Aghajani

引用次数: 0

Design technique co-optimization approach to GAA FETs for inverter design at advanced technology node 用于先进技术节点逆变器设计的GAA-FET设计技术协同优化方法

IF 1.1

Nanomaterials and Energy Pub Date : 2023-06-01 DOI: 10.1680/jnaen.23.00029

E. Mohapatra, J. Jena, Devika Jena, Sanghamitra Das, Tara Prasanna Dash

引用次数: 0

Mechanical properties of aluminum through electronic- and atomic-scale simulations 通过电子和原子尺度模拟铝的机械性能

IF 1.1

Nanomaterials and Energy Pub Date : 2023-06-01 DOI: 10.1680/jnaen.23.00017

S. Khani, H. Palkowski

{"title":"Mechanical properties of aluminum through electronic- and atomic-scale simulations","authors":"S. Khani, H. Palkowski","doi":"10.1680/jnaen.23.00017","DOIUrl":"https://doi.org/10.1680/jnaen.23.00017","url":null,"abstract":"Implementing the integrated computational materials engineering methodology in modeling plastic deformation processes and associated phenomena can provide a unique opportunity for a deeper study of material behavior at smaller scales and result in more precise and accurate predictions. This study presents a multiscale modeling framework linking two different length scales – namely, the electronic and the atomic scale – to investigate the mechanical properties of pure aluminum (Al) and to achieve the required parameters and information for higher scales. At the electronic scale, the elastic properties and interfacial energies for aluminum were garnered from density functional theory simulations to calibrate the modified embedded atom method (MEAM) potentials required for atomic simulations. The calculation for the generalized stacking fault energy resulted in an intrinsic stacking fault energy of 185.5 mJ/m2. Using the parameter calculated at the electronic scale as well as the MEAM potential parameters, the edge dislocation mobility of aluminum from molecular dynamics simulations was calculated at the atomic scale (nano). A drag coefficient of 7.3 × 10−5 Pa s was computed at 300 K. The dependency of the drag coefficient on the temperature was also studied, and the results showed that the velocity linearly depended on τ/T up to 0.4 MPa/K.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42312922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal fatigue testing with repeatable temperature cycles on thermomechanical simulator Gleeble 1500D 在热机械模拟器Gleeble 1500D上进行可重复温度循环的热疲劳试验

IF 1.1

Nanomaterials and Energy Pub Date : 2023-06-01 DOI: 10.1680/jnaen.23.00012

P. Fajfar, D. Bombač, G. Kugler, M. Tercelj

{"title":"Thermal fatigue testing with repeatable temperature cycles on thermomechanical simulator Gleeble 1500D","authors":"P. Fajfar, D. Bombač, G. Kugler, M. Tercelj","doi":"10.1680/jnaen.23.00012","DOIUrl":"https://doi.org/10.1680/jnaen.23.00012","url":null,"abstract":"This paper presents two thermal fatigue tests developed to simulate the typical thermal fatigue behavior of hot work tools and rolls. The tests were carried out on the Gleeble 1500D thermomechanical simulator with computer-controlled heating and cooling of the test specimens. In the first test, internal cooling of the specimens is performed, and in the second test, an external one. This allows constant test conditions and the collection of reliable experimental data on the thermal fatigue behaviour. The internally cooled test rig is used for testing the thermal fatigue properties of bulk materials. ICDP cast iron was used to present the basic capabilities of the test. At the material, the cracks take flattened graphite – cementite pathways. The external cooling test rig, on the other hand was designed for comparative testing of four surface simultaneously. Thus, the capabilities of the second test were presented in the comparative testing of three different laser-welded functionally graded material surface layers and the basic H13 tool steel, simultaneously. The highest thermal fatigue resistance exhibited the weld with the lowest Si content. A quantitative evaluation of thermal fatigue resistance as well as following of degradation processes at both tests is enabled.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42563952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green emission and photoelectrical properties of low concentration Mn doped CsPbBr3 nanocrystals 低浓度Mn掺杂CsPbBr3纳米晶体的绿色发射和光电性能

IF 1.1

Nanomaterials and Energy Pub Date : 2023-03-01 DOI: 10.1680/jnaen.22.00062

A. Bhardwaj, A. Kushwaha

{"title":"Green emission and photoelectrical properties of low concentration Mn doped CsPbBr3 nanocrystals","authors":"A. Bhardwaj, A. Kushwaha","doi":"10.1680/jnaen.22.00062","DOIUrl":"https://doi.org/10.1680/jnaen.22.00062","url":null,"abstract":"Doping of Cesium Lead Bromide (CsPbBr3) perovskite nanocrystals offers the effective control on the optical and optoelectrical properties leading to possibilities for several new applications. Herein, CsPbBr3 perovskite nanocrystals are synthesised with low concentration of Manganese (Mn) doping into perovskite lattice using Manganese chloride (MnCl2) precursor. A shift in x-ray diffraction peaks towards higher angles indicates that Mn as a dopant is present inside CsPbBr3 lattice. The change in the MnCl2 precursor concentration from 5 to 10 mmol, results an increment in the atomic percentage (At.%) of Mn from 0.3 to 0.5% into the CsPbBr3 crystal. Low concentration of Mn doping (0.3 At.%) in CsPbBr3 results in enhancement of green emission, while higher Mn doping (0.5 At.%) results in blue emission. The band gap of CsPbBr3 nanocrystals increases from 2.31 eV to 2.53 eV with increase in the concentration of manganese. The dark and photoelectrical conductivity of CsPbBr3 nanocrystals is improved in case of low concentration (0.3 At.%) of Mn doping. The ratio of photocurrent vs. dark current is found to be ∼182 in Mn doped CsPbBr3 crystals film as compared to ∼101 for undoped CsPbBr3 crystals film. The low concentration of Mn doping improves the overall electrical and photoelectrical conductivity of CsPbBr3 perovskite nanocrystals.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67489333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anion/cation substitution in lead-free double-perovskite films: for band-gap optimization 无铅双钙钛矿薄膜中的阴离子/阳离子取代：用于带隙优化

IF 1.1

Nanomaterials and Energy Pub Date : 2023-03-01 DOI: 10.1680/jnaen.23.00001

Bhawna, A. Alam, M. Aslam

{"title":"Anion/cation substitution in lead-free double-perovskite films: for band-gap optimization","authors":"Bhawna, A. Alam, M. Aslam","doi":"10.1680/jnaen.23.00001","DOIUrl":"https://doi.org/10.1680/jnaen.23.00001","url":null,"abstract":"During the past few years, halide double perovskites have been extensively explored for designing eco-friendly and stable perovskite-family absorber materials. In this work, thin films of Cs2AgBiBr6 double perovskites were successfully fabricated with the aim of obtaining a lead-free system. Optical studies confirmed the large band gap of 2.33 eV of Cs2AgBiBr6 films. Post-synthetic vapor treatment of Cs2AgBiBr6 thin films, with tin (IV) iodide (SnI4; SI), was performed to engineer their optical response. Structural and optical studies confirmed the phase purity of the various SI-treated films. X-ray diffraction studies further showed a systematic shift toward lower 2θ values, which signified the expansion of lattice parameters on SI substitution in the Cs2AgBiBr6 structure. The as-prepared pristine and SI-treated films showed good coverage with a reasonably large grain size. Furthermore, the optical studies revealed a 0.47 eV reduction in the band gap of SI-treated films, as opposed to a small band-gap change of approximately 0.22 eV when the pristine Cs2AgBiBr6 film was treated with cesium iodide (CsI). This showed the role of the combined effects of charge-balancing defects and compositional substitution in band-gap lowering in Cs2AgBiBr6. The controlled doping in lead-free double perovskites for improved optical properties might help in strengthening their use for future optoelectronic applications.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42927306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Band-gap-engineered mixed-halide perovskite films through vacuum-based deposition approach 带隙工程混合卤化物钙钛矿薄膜的真空沉积方法

IF 1.1

Nanomaterials and Energy Pub Date : 2023-03-01 DOI: 10.1680/jnaen.23.00003

Rekha Yadav, Gangadhar Banappanavar, M. Aslam

{"title":"Band-gap-engineered mixed-halide perovskite films through vacuum-based deposition approach","authors":"Rekha Yadav, Gangadhar Banappanavar, M. Aslam","doi":"10.1680/jnaen.23.00003","DOIUrl":"https://doi.org/10.1680/jnaen.23.00003","url":null,"abstract":"Mixed-halide perovskites offer the important characteristic of band-gap tunability, which is essential for tandem solar cells. Herein, the single-source vapor deposition method is reported for MAPbBr2Cl1 (MA (methyl ammonium) = CH3NH3), MAPbBr1.5Cl1.5 and MAPbBr1Cl2 perovskite films utilizing the corresponding mixed-halide perovskite nanoparticles as a source for thermal evaporation. Further, band-gap tuning in vacuum-deposited MAPbBr3 thin films is performed through MACl treatment with successful band-gap tuning from 2.37 to 2.48 eV. The limitation of chlorine (Cl) incorporation into the perovskite structure at room temperature is tackled by MACl treatment of vapor-deposited MAPbBr2Cl1, MAPbBr1.5Cl1.5 and MAPbBr1Cl2 films. The structural properties of MAPbBr3−x Cl x films show a continuous shift in the X-ray diffraction peak toward a higher 2θ value, confirming chlorine incorporation into the perovskite structure. Band-gap tuning in MAPbBr3−x Cl x films, from 2.37 to 2.86 eV, is confirmed by absorption spectroscopy. The mixed-halide perovskite films show an improved microstructure with MACl treatment, as observed from the increased grain size of the films. Further, emission studies show good stability of MAPbBr3−x Cl x films against phase segregation under continuous exposure to 325 nm wavelength illumination of 100 mW/cm2 for more than 60 min. The diminished phase segregation might help in advancing the application of mixed-halide perovskites for reliable optoelectronic devices.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42613759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical investigation of Sol-Gel synthesized and spin-coating SiO2/TiO2 multilayers 溶胶-凝胶合成和旋涂SiO2/TiO2多层膜的光学研究

IF 1.1

Nanomaterials and Energy Pub Date : 2023-03-01 DOI: 10.1680/jnaen.22.00039

S. Saravanan, R. S. Dubey, P. Subbarao

引用次数: 0

Graphene oxide doped poly (styrene-co-maleic anhydride) for high energy supercapacitors 高能超级电容器用氧化石墨烯掺杂聚苯乙烯-共马来酸酐

IF 1.1

Nanomaterials and Energy Pub Date : 2023-03-01 DOI: 10.1680/jnaen.22.00026

Remya Simon, S. Chakraborty, A. V., Elias Jesu Packiam D., M. N. L.

{"title":"Graphene oxide doped poly (styrene-co-maleic anhydride) for high energy supercapacitors","authors":"Remya Simon, S. Chakraborty, A. V., Elias Jesu Packiam D., M. N. L.","doi":"10.1680/jnaen.22.00026","DOIUrl":"https://doi.org/10.1680/jnaen.22.00026","url":null,"abstract":"Reliable energy storage materials which can provide enhanced capacitance with good cycling stability along with improved energy and power densities are exceedingly relevant in the commercial arena to attenuate the prevalent energy shortage. Polymers with structural flexibility and good mechanical and thermal stability can be coupled with carbon-based additives to obtain an electrochemical platform for energy storage without compromising on the required thermal and mechanical attributes. Here, styrene maleic-anhydride copolymer has been modified with a diamine to form a polyimide. These samples have been characterized using UV- Visible, 13C NMR, FTIR, FT Raman spectroscopy, TGA, DSC, BET, SEM, TEM and XRD techniques to understand and substantiate the spectral, morphological and electrochemical characteristics of the polymer nanocomposites. Efficacious intercalation of Graphene oxide has resulted in the formation of polymer nanocomposites which can act as excellent supercapacitor electrodes with a high specific capacitance of 700 F/g at 0.5 A/g and an energy and power density of 129.23 Wh kg−1 and 5572 Wkg−1 respectively.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44628114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tapered substrate thickness to enhance the performance of piezoelectric energy harvester 锥形基板厚度可提高压电能量采集器的性能

IF 1.1

Nanomaterials and Energy Pub Date : 2022-12-01 DOI: 10.1680/jnaen.22.00038

Ashutosh Anand, Manish Kumar

引用次数: 0