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Improved thermoelectric properties of the β-Cu2+xSe/CuInSe2 multilayer films by layer interface scattering 通过层界面散射改善 β-Cu2+xSe/CuInSe2 多层薄膜的热电性能
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-19 DOI: 10.1016/j.cap.2024.11.010
Yu Chen, Guihong Song, Zhihao Ben, Yusheng Wu, Junhua You
{"title":"Improved thermoelectric properties of the β-Cu2+xSe/CuInSe2 multilayer films by layer interface scattering","authors":"Yu Chen,&nbsp;Guihong Song,&nbsp;Zhihao Ben,&nbsp;Yusheng Wu,&nbsp;Junhua You","doi":"10.1016/j.cap.2024.11.010","DOIUrl":"10.1016/j.cap.2024.11.010","url":null,"abstract":"<div><div>The β-Cu<sub>2+x</sub>Se/CuInSe<sub>2</sub> multilayer films with different modulation period were prepared and studied. The results showed that the deposited films possessed obvious layered structure. The room temperature carrier concentration, mobility, electrical conductivity and thermal conductivity decreased, but the Seebeck coefficient and power factor and relative thermoelectric figure of merit increased with reducing modulation period of deposited β-Cu<sub>2-x</sub>Se/CuInSe<sub>2</sub> multilayer films. The linear reduction of carrier concentration and mobility and the decrease in thermal conductivity with modulation period was attributed to the scattering of carriers and phonons by layer interface and grain boundary, respectively. The sample with the smallest modulation period (160 nm) possessed the highest power factor of ∼0.74 at room temperature and ∼1.56 mW m<sup>−1</sup> K<sup>−2</sup> at 405 °C. The insertion of heterogeneous layer into films is an effective method to increase Seebeck coefficient and decrease thermal conductivity, thus increasing thermoelectric figure of merit of films.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"70 ","pages":"Pages 1-10"},"PeriodicalIF":2.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact analysis of various types of simulated multiple scattering matrices on the numerical simulation of high-resolution imaging in scattering media 各类模拟多重散射矩阵对散射介质中高分辨率成像数值模拟的影响分析
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-19 DOI: 10.1016/j.cap.2024.11.004
Ye-Ryoung Lee
{"title":"Impact analysis of various types of simulated multiple scattering matrices on the numerical simulation of high-resolution imaging in scattering media","authors":"Ye-Ryoung Lee","doi":"10.1016/j.cap.2024.11.004","DOIUrl":"10.1016/j.cap.2024.11.004","url":null,"abstract":"<div><div>Optical techniques are essential in biomedical research, enabling high-resolution, non-invasive imaging of biological tissues. However, imaging depth in optical microscopy is limited by multiple scattering in scattering media, such as biological tissues. Various methods have been developed to overcome this limitation, and numerical simulations have played an important role in developing new imaging techniques. Traditional simulations often use simple random matrices to represent multiple-scattered waves, which overly simplifies their behavior and may impact the accuracy of image quality assessments. In this study, we introduce various types of simulated multiple scattering matrices to better capture the characteristics of scattered waves. We systematically analyze the correlation properties of these matrices and evaluate their impact on high-resolution imaging quality. This work provides a foundation for selecting appropriate matrix types for simulating multiple scattering effects, aiding in the effective testing and validation of new microscopy techniques in scattering media.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"70 ","pages":"Pages 21-26"},"PeriodicalIF":2.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Near-field infrared spectroscopy: Advanced research method in thin film analysis 近场红外光谱仪：薄膜分析中的先进研究方法
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-16 DOI: 10.1016/j.cap.2024.11.002
Jiho Kim , Boknam Chae , Sangsul Lee
{"title":"Near-field infrared spectroscopy: Advanced research method in thin film analysis","authors":"Jiho Kim ,&nbsp;Boknam Chae ,&nbsp;Sangsul Lee","doi":"10.1016/j.cap.2024.11.002","DOIUrl":"10.1016/j.cap.2024.11.002","url":null,"abstract":"<div><div>This article introduces several cases of s-SNOM (Scattering-type scanning near-field optical microscopy) based on a SPM (Scanning probe microscopy) for chemical thin film. A highly concentrated near-field infrared performs the chemical analysis of s-SNOM at the sharp apex of the metal-coated atomic microscope tip. This attractive technique, which provides both surface morphology and chemical information of the material simultaneously, various studies have been published, including surface polariton propagation, Moire superlattice, and ballistic valley transport. Further, s-SNOM successfully visualized the formation of lamellar nanostructures of BCP and the latent image of photoresist formed by EUV (extreme ultraviolet). These results were cross-validated through traditional GIWAXS (Grazing-incidence wide-angle X-ray scattering) and FTIR (Fourier transform infrared) analysis. s-SNOM is a useful tool for providing new insights into material analysis by visualizing nanoscale chemical information of local regions that conventional measurements could not confirm.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"70 ","pages":"Pages 41-50"},"PeriodicalIF":2.4,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of electron thermal properties in Ar/O2 inductively coupled plasmas: A global model simulation using Langmuir probe data Ar/O2电感耦合等离子体中的电子热特性分析：利用朗缪尔探针数据进行全局模型模拟
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-15 DOI: 10.1016/j.cap.2024.11.003
Hwiwon Seo , Haneul Lee , Ji-Won Kwon , Gwanjoong Kim , Ingyu Lee , Gon-Ho Kim
{"title":"Analysis of electron thermal properties in Ar/O2 inductively coupled plasmas: A global model simulation using Langmuir probe data","authors":"Hwiwon Seo ,&nbsp;Haneul Lee ,&nbsp;Ji-Won Kwon ,&nbsp;Gwanjoong Kim ,&nbsp;Ingyu Lee ,&nbsp;Gon-Ho Kim","doi":"10.1016/j.cap.2024.11.003","DOIUrl":"10.1016/j.cap.2024.11.003","url":null,"abstract":"<div><div>This study investigates the electron thermal properties in Argon and Ar/O2 inductively coupled plasmas using global model based on Langmuir probe data. The sensor-data driven global model (GM) is improved to simulate the power coupling efficiency and an electron energy distribution simultaneously. It reveals that the heating characteristic changes the thermal state and radical generation with input power, pressure and gas mixture ratio. The analysis results of probe data from the global model provide information on the plasma thermal characteristics under efficient operating conditions of process plasma. It provides the advantage of offering insights into the causes of variations in the plasma thermal equilibrium state with operating conditions in ICP, which are limited to obtain from the sensor or the general GM. This makes it highly promising as a simulation method for developing process recipes.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"70 ","pages":"Pages 27-40"},"PeriodicalIF":2.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Highly selective dual gas (NO & NO2) sensing depended on the operating temperature of WO3 thin films sputtered at room temperature 高选择性双气体（NO 和 NO2）传感取决于室温下溅射的 WO3 薄膜的工作温度
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-15 DOI: 10.1016/j.cap.2024.11.009
Charu Dwivedi , Stuti Srivastava , Preetam Singh
{"title":"Highly selective dual gas (NO & NO2) sensing depended on the operating temperature of WO3 thin films sputtered at room temperature","authors":"Charu Dwivedi ,&nbsp;Stuti Srivastava ,&nbsp;Preetam Singh","doi":"10.1016/j.cap.2024.11.009","DOIUrl":"10.1016/j.cap.2024.11.009","url":null,"abstract":"<div><div>We have studied the effect of film thickness (120, 180, and 286 nm) on the dual gas (NO &amp; NO<sub>2</sub>) sensing performance of DC magnetron sputtered WO<sub>3</sub> thin films deposited at room temperature. WO<sub>3</sub> shows strong absorption from visible light to the infrared region. An unusual peak originates at 467.6 nm (film thickness 286 nm) instead of a broadband tail, usually found in WO<sub>3</sub>, which has been linked with oxygen vacancies. A high response of ∼196 at 150 °C for 50 ppm NO and ∼50 at 250 °C for 50 ppm NO<sub>2</sub> is achieved for 286 nm film, which can be associated with Localized Surface Plasmon Resonance while a low response/recovery time of ∼39s/99s is obtained for 120 nm film at 200 °C for NO gas, which is its best operating temperature too (sensor response ∼100). Even under a high humidity (90 %) environment, the sensor detected 50 ppm of NO.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"69 ","pages":"Pages 70-80"},"PeriodicalIF":2.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of ex-situ solid and liquid iodine doping methods at different temperatures to improve electrical properties of polythiophene nanostructure films synthesized by atmospheric pressure plasma process 比较不同温度下原位固态和液态碘掺杂法改善常压等离子工艺合成的聚噻吩纳米结构薄膜的电气性能
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-15 DOI: 10.1016/j.cap.2024.11.007
Habeeb Olaitan Suleiman , Eun Young Jung , Hyojun Jang , Jae Young Kim , Heung-Sik Tae
{"title":"Comparison of ex-situ solid and liquid iodine doping methods at different temperatures to improve electrical properties of polythiophene nanostructure films synthesized by atmospheric pressure plasma process","authors":"Habeeb Olaitan Suleiman ,&nbsp;Eun Young Jung ,&nbsp;Hyojun Jang ,&nbsp;Jae Young Kim ,&nbsp;Heung-Sik Tae","doi":"10.1016/j.cap.2024.11.007","DOIUrl":"10.1016/j.cap.2024.11.007","url":null,"abstract":"<div><div>Despite advancements in research on conducting polymers, obtaining stable conductivity in thin films remains challenging. Although ex-situ iodine (I<sub>2</sub>) doping methods have exhibited promise, they often result in unstable conductivity with increasing exposure time. This study aimed to produce polythiophene (PTh) nanostructure films with stable electrical conductivity through optimized ex-situ I<sub>2</sub>-doping techniques using a newly fabricated atmospheric pressure plasma reactor for PTh deposition. I<sub>2</sub> charge carriers in the form of solid and liquid were separately incorporated into the PTh at room temperatures and 60 °C. FE-SEM, EDS, and FT-IR revealed an enhanced molecular structure, the distribution of element and functional chemical composition of the doped PTh nanostructure films, respectively. Compared to solid I<sub>2</sub> doping, the liquid-doped PTh exhibited improved electrical conductivity and stable conductivity over a long period. The results also proved promising for reliable applications in electronic devices, making ex-situ liquid I<sub>2</sub> doping a good technique.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"70 ","pages":"Pages 11-20"},"PeriodicalIF":2.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Carrier concentration dependence of optical and magnetic properties in epitaxial manganese-doped indium tin oxide films with different manganese concentrations 不同锰浓度的掺杂铟锡氧化物外延薄膜的光学和磁学特性与载流子浓度的关系
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-15 DOI: 10.1016/j.cap.2024.11.008
Saiki Kitagawa , Toshihiro Nakamura
{"title":"Carrier concentration dependence of optical and magnetic properties in epitaxial manganese-doped indium tin oxide films with different manganese concentrations","authors":"Saiki Kitagawa ,&nbsp;Toshihiro Nakamura","doi":"10.1016/j.cap.2024.11.008","DOIUrl":"10.1016/j.cap.2024.11.008","url":null,"abstract":"<div><div>Epitaxial manganese-doped indium tin oxide (Mn-doped ITO) films with different Mn concentrations were deposited on single-crystal yttria-stabilized zirconia substrates using radio-frequency magnetron sputtering. The carrier concentration of the epitaxial Mn-doped ITO films could be controlled by changing the Mn doping concentration. The optical bandgaps of the films increased with the increase in the carrier concentration. Room-temperature ferromagnetism was observed in all films irrespective of the Mn concentration. The saturation magnetizations of the films increased with the increase in the carrier concentration, which suggests that delocalized charge carrier-mediated interaction model is one of the most probable mechanisms of the ferromagnetism in the Mn-doped ITO films. We found that the carrier concentration plays a crucial role in controlling optical and magnetic properties of the Mn-doped ITO films. The results of this study provide useful insight into the application of Mn-doped ITO films to ferromagnetic electrodes in spintronic devices.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"69 ","pages":"Pages 60-69"},"PeriodicalIF":2.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Transient heat-flux method for measuring heat capacity: Examples from Cu and VO2 测量热容量的瞬态热流法：以铜和 VO2 为例
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-13 DOI: 10.1016/j.cap.2024.11.005
Dongjin Jang , Minsik Kong , Jong Mok Ok
{"title":"Transient heat-flux method for measuring heat capacity: Examples from Cu and VO2","authors":"Dongjin Jang ,&nbsp;Minsik Kong ,&nbsp;Jong Mok Ok","doi":"10.1016/j.cap.2024.11.005","DOIUrl":"10.1016/j.cap.2024.11.005","url":null,"abstract":"<div><div>Many quantum materials undergo phase transitions above room temperature. However, thermodynamic evidence of these phase transitions is relatively scarce. For instance, detailed specific heat anomalies have rarely been reported for the transitions. In addition to considering intrinsic factors that obscure the thermodynamic manifestation of relevant degrees of freedom, it is also important to revisit measurement techniques based on firmly established physical principles. In this study, we introduce a transient heat-flux method for measuring heat capacity of solids, and report a specific heat anomaly in VO<sub>2</sub>, along with the reproduction of the standard specific heat capacity data of Cu. At present, our method is capable of measuring heat capacities ranging from 1 J/mol⋅K to 400 J/mol⋅K with an uncertainty of 5% across a temperature range from room temperature to 100 °C.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"69 ","pages":"Pages 55-59"},"PeriodicalIF":2.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interplay of surface plasmon and Fabry-Perot resonances in metallic hole arrays on dielectric layers 介电层上金属孔阵列中表面等离子体与法布里-珀罗共振的相互作用
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-13 DOI: 10.1016/j.cap.2024.11.006
J. Jeon , H.J. Kim , B.S. Chun , S.J. Lee
{"title":"Interplay of surface plasmon and Fabry-Perot resonances in metallic hole arrays on dielectric layers","authors":"J. Jeon ,&nbsp;H.J. Kim ,&nbsp;B.S. Chun ,&nbsp;S.J. Lee","doi":"10.1016/j.cap.2024.11.006","DOIUrl":"10.1016/j.cap.2024.11.006","url":null,"abstract":"<div><div>This study investigates the resonant behavior of a nanostructured absorber consisting of a metal hole array (MHA) on a dielectric layer (BCB) forming a cavity on a metal ground plane (MGP). By varying the thickness of the BCB layer, the resonance spectra were analyzed under different conditions. Our simulations reveal the intricate interplay between surface plasmon and Fabry-Perot resonances within the MHA-BCB-MGP structure. We observe that as the dielectric thickness changes, the resonance peaks shift, exhibiting phenomena such as Rabi splitting and bifurcation. These features are particularly pronounced under transverse magnetic polarization, indicating the complex interaction between different resonance modes and polarization states. In addition, changes in MHA diameter affected the dominance of either surface plasmon or Fabry-Perot resonances, illustrating the complex relationship between structure and resonance behavior. Reflection spectra under different polarizations and angles of incidence showed agreement between simulation and experiment, validating the proposed model.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"69 ","pages":"Pages 81-87"},"PeriodicalIF":2.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Permeability modulation of Fe-Ni/nanoparticle (Ni, Zn) soft magnetic composites 铁-镍/纳米粒子（镍、锌）软磁复合材料的渗透性调制
IF 2.4 4区 物理与天体物理
Current Applied Physics Pub Date : 2024-11-05 DOI: 10.1016/j.cap.2024.10.016
Sang Woo Kim, Yeon Jun Choi, Ye Rae Kim, Deok Hyeon Kim, Ye Jin In, Tae Han Kim, Bo Wha Lee
{"title":"Permeability modulation of Fe-Ni/nanoparticle (Ni, Zn) soft magnetic composites","authors":"Sang Woo Kim,&nbsp;Yeon Jun Choi,&nbsp;Ye Rae Kim,&nbsp;Deok Hyeon Kim,&nbsp;Ye Jin In,&nbsp;Tae Han Kim,&nbsp;Bo Wha Lee","doi":"10.1016/j.cap.2024.10.016","DOIUrl":"10.1016/j.cap.2024.10.016","url":null,"abstract":"<div><div>In this study, we investigated how adding nanopowders to a micropowder affects the packing fraction and permeability. The micropowder used was a Fe-Ni crystalline alloy, which was sieved to less than 38 μm to minimize the effect of particle size distribution. The nanopowders, magnetic Ni and nonmagnetic Zn, were added to the Fe-Ni at weight ratios of 95:5, 90:10, 85:15, and 80:20. The results showed that the permeability of Fe-Ni was higher when sieved to 38 μm compared to the overall particle size. When the magnetic Ni nanopowder was added to the Fe-Ni powder sieved to 38 μm, both the packing fraction and permeability increased up to a ratio of 85:15 and then decreased. On the other hand, when the nonmagnetic Zn nanopowder was added, the packing fraction increased up to a ratio of 85:15 and then decreased, while the permeability continued to decrease.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"69 ","pages":"Pages 42-46"},"PeriodicalIF":2.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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