A report of nano-scale interaction of chloromethane (methyl chloride) (CH3Cl) with the Fe(110) surface; van der Waals density functional theory (DFT) study. Physisorption of a CH3Cl molecule via changing the site and orientation of the molecule was studied on the Fe(100) surface using DFT. All reasonable molecular and dissociative adsorption routes of the CH3Cl molecule on the Fe(100) surface have been systematically investigated. Molecular adsorption was considered on four different surface sites with different orientations with Cl, C, and H atoms toward and away from the surface. Chemisorption was considered by decomposition of CH3Cl into a methyl (CH3) group and a Cl atom via a cleavage of the C–Cl bond and by decomposition into a CH2Cl group and a H atom via a cleavage one of the C–H bonds. Chemisorption produces a greater degree of bonding than physisorption.
{"title":"Nano-scale Interaction of Chloromethane (CH<sub>3</sub>Cl) with the Fe(110) Surface; A van der Waals Calculation","authors":"Sherin A. Saraireh","doi":"10.1380/ejssnt.2023-062","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-062","url":null,"abstract":"A report of nano-scale interaction of chloromethane (methyl chloride) (CH3Cl) with the Fe(110) surface; van der Waals density functional theory (DFT) study. Physisorption of a CH3Cl molecule via changing the site and orientation of the molecule was studied on the Fe(100) surface using DFT. All reasonable molecular and dissociative adsorption routes of the CH3Cl molecule on the Fe(100) surface have been systematically investigated. Molecular adsorption was considered on four different surface sites with different orientations with Cl, C, and H atoms toward and away from the surface. Chemisorption was considered by decomposition of CH3Cl into a methyl (CH3) group and a Cl atom via a cleavage of the C–Cl bond and by decomposition into a CH2Cl group and a H atom via a cleavage one of the C–H bonds. Chemisorption produces a greater degree of bonding than physisorption.","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135305552","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}
AlGaN/GaN high electron mobility transistors (HEMTs) possess favorable material properties and are compatible with large-scale manufacturing, making them promising as a next-generation power device. However, there is a lack of information available on the effect of an insulator dielectric passivation layer on the breakdown voltage (Vbr) of AlGaN/GaN HEMTs. This study utilizes technology computer aided design to investigate the impact of different insulator dielectric passivation layers, such as SiO2, SiN, Al2O3, and HfO2, on Vbr of AlGaN/GaN HEMTs. Furthermore, the study optimizes the parameters of the field plate length (LFP) and insulator thickness to maximize Vbr of AlGaN/GaN HEMTs. Results indicate that HEMTs with a field plate (FP-HEMTs) have greater Vbr than HEMTs without a field plate (N-HEMTs). With the optimized conditions of a 1.8 µm LFP and a 0.95 µm insulator thickness with HfO2 passivation, Vbr of 1120 V is achieved. The findings suggest that the field plate (FP) and passivation layer can significantly improve the efficiency and reliability of AlGaN/GaN HEMTs while the impact of AlGaN/GaN heterostructure parameters on Vbr is minimal.
{"title":"Design Optimization of High Breakdown Voltage AlGaN/GaN High Electron Mobility Transistor with Insulator Dielectric Passivation Layer","authors":"Phuc Hong Than, Tho Quang Than","doi":"10.1380/ejssnt.2023-061","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-061","url":null,"abstract":"AlGaN/GaN high electron mobility transistors (HEMTs) possess favorable material properties and are compatible with large-scale manufacturing, making them promising as a next-generation power device. However, there is a lack of information available on the effect of an insulator dielectric passivation layer on the breakdown voltage (Vbr) of AlGaN/GaN HEMTs. This study utilizes technology computer aided design to investigate the impact of different insulator dielectric passivation layers, such as SiO2, SiN, Al2O3, and HfO2, on Vbr of AlGaN/GaN HEMTs. Furthermore, the study optimizes the parameters of the field plate length (LFP) and insulator thickness to maximize Vbr of AlGaN/GaN HEMTs. Results indicate that HEMTs with a field plate (FP-HEMTs) have greater Vbr than HEMTs without a field plate (N-HEMTs). With the optimized conditions of a 1.8 µm LFP and a 0.95 µm insulator thickness with HfO2 passivation, Vbr of 1120 V is achieved. The findings suggest that the field plate (FP) and passivation layer can significantly improve the efficiency and reliability of AlGaN/GaN HEMTs while the impact of AlGaN/GaN heterostructure parameters on Vbr is minimal.","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135305556","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}
Y. Tsujikawa, Xiaoni Zhang, M. Horio, Fumio Komori, Takeru Nakashima, Y. Ando, Takahiro Kondo, Iwao Matsuda
{"title":"Structure and Electronic State of Boron Atomic Chains on a Noble Metal (111) Surface","authors":"Y. Tsujikawa, Xiaoni Zhang, M. Horio, Fumio Komori, Takeru Nakashima, Y. Ando, Takahiro Kondo, Iwao Matsuda","doi":"10.1380/ejssnt.2023-058","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-058","url":null,"abstract":"","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46570757","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}
Herman Bekman, Jurjen Emmelkamp, Youyou Westland, Dorus Elstgeest, Thomas Mechielsen, Michael Haye, Freek Molkenboer, Norbert Koster, Henk Lensen
{"title":"MFIG — A Mass Filtered Ion Gauge","authors":"Herman Bekman, Jurjen Emmelkamp, Youyou Westland, Dorus Elstgeest, Thomas Mechielsen, Michael Haye, Freek Molkenboer, Norbert Koster, Henk Lensen","doi":"10.1380/ejssnt.2023-059","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-059","url":null,"abstract":"","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42904096","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}
M. Ito, Naoya Tajima, H. Murotani, Takayuki Matsudaira
{"title":"Super Hydrophilic Low Refractive Index SiO2 Optical Thin Films Deposited by Using a Combination Coating Method","authors":"M. Ito, Naoya Tajima, H. Murotani, Takayuki Matsudaira","doi":"10.1380/ejssnt.2023-057","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-057","url":null,"abstract":"","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44368878","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}
Shouhei Kawada, Shunsuke Tanji, Jyo Kobayashi, Kaiasei Sato, M. Miyatake, S. Sasaki
{"title":"Effects of Relative Humidity on Lubricating Properties of Ionic Liquids","authors":"Shouhei Kawada, Shunsuke Tanji, Jyo Kobayashi, Kaiasei Sato, M. Miyatake, S. Sasaki","doi":"10.1380/ejssnt.2023-056","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-056","url":null,"abstract":"","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41877503","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}
{"title":"Solar Irradiance Absorption Performance of a Spherical Multilayered Nanoparticle Coated with Graphene","authors":"Fitriyadi, A. Azwar, F. A. Noor","doi":"10.1380/ejssnt.2023-055","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-055","url":null,"abstract":"","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41337174","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}
Yuto Fukui, Tomoya Kanno, Kota Yamakawa, H. Nakada, Yodai Kobayashi, Keiko Widyanisa, Yuka Tomimatsu, K. Kimura, T. Shishido, N. Happo, K. Ohoyama, Koichi Hayashi
{"title":"Local Structures of Fe0.08Co0.92 Studied by X-ray Fluorescence Holography","authors":"Yuto Fukui, Tomoya Kanno, Kota Yamakawa, H. Nakada, Yodai Kobayashi, Keiko Widyanisa, Yuka Tomimatsu, K. Kimura, T. Shishido, N. Happo, K. Ohoyama, Koichi Hayashi","doi":"10.1380/ejssnt.2023-054","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-054","url":null,"abstract":"","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42142529","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}
{"title":"Characterization of Liquid Targets in Vacuum Condition","authors":"K. Yamamoto, N. Ogiwara, Masaya Kuramochi","doi":"10.1380/ejssnt.2023-053","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-053","url":null,"abstract":"","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44676025","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}
{"title":"Rarefied Gas Flow through Long Rectangular Channel with Very Small Gap-to-Width Ratio: Experiments and DSMC Calculations","authors":"N. Ogiwara, Y. Hori, H. Yoshida, K. Arai","doi":"10.1380/ejssnt.2023-052","DOIUrl":"https://doi.org/10.1380/ejssnt.2023-052","url":null,"abstract":"","PeriodicalId":11626,"journal":{"name":"E-journal of Surface Science and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42429965","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}
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