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Dielectric Materials in Organic Thin Film Transistors 有机薄膜晶体管中的介电材料
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 2007-12-01 DOI: 10.5210/JUR.V1I1.7451
A. Awomolo, L. Jiang, J. Zhang, G. Jursich, C. Takoudis
{"title":"Dielectric Materials in Organic Thin Film Transistors","authors":"A. Awomolo, L. Jiang, J. Zhang, G. Jursich, C. Takoudis","doi":"10.5210/JUR.V1I1.7451","DOIUrl":"https://doi.org/10.5210/JUR.V1I1.7451","url":null,"abstract":"This work focuses on dielectric materials in organic thin film transistors. Silicon oxides whose surfaces are modified with hexamethyldisilazane (HMDS) and octyltriethoxylSilane (OTS) are investigated. Organic semiconducting materials are used in the transistors made within the scope of this work. Although the devices made using our procedures did not exhibit satisfactory performance, we explored and understood some chemical and engineering aspects of the relevant dielectric/semiconductor interfaces in organic thin film transistors. Understanding these systems would help with improvements of the electrical properties and performance of such systems when plastic substrates are used at the next stage of the project.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115571199","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: 1
Quantification of Hydrophobic Recovery and Temporal Bonding in Polydimethylsiloxane 聚二甲基硅氧烷疏水恢复和时间键的定量研究
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 2007-12-01 DOI: 10.5210/JUR.V1I1.7455
N. Zachariah, J. Mohammed, D. Eddington
{"title":"Quantification of Hydrophobic Recovery and Temporal Bonding in Polydimethylsiloxane","authors":"N. Zachariah, J. Mohammed, D. Eddington","doi":"10.5210/JUR.V1I1.7455","DOIUrl":"https://doi.org/10.5210/JUR.V1I1.7455","url":null,"abstract":"Polydimethylsiloxane is used ubiquitously in micro fluidics both as a mold and as a device in and of itself due to the polymer's distinct physical and chemical properties. This elastomer is intrinsically hydrophobic due to the methyl group that is a part of its chemical backbone. Hydrophilicity is induced by plasma activation but is short lived as this elastomer regains its hydrophobic nature as uncrosslinked PDMS chains start to reorient back to the surface. Quantifying the bonding time frame will prove invaluable for any and all research applications that revolve around PDMS.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"241 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134498366","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: 1
Synthesis and Characterization of Calcium Hexaboride (CaB6) Nanowires 六硼化钙纳米线的合成与表征
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 2007-12-01 DOI: 10.5210/JUR.V1I1.7448
S. Tan, P. Jash, M. Trenary
{"title":"Synthesis and Characterization of Calcium Hexaboride (CaB6) Nanowires","authors":"S. Tan, P. Jash, M. Trenary","doi":"10.5210/JUR.V1I1.7448","DOIUrl":"https://doi.org/10.5210/JUR.V1I1.7448","url":null,"abstract":"The objective of the current research was to synthesize calcium hexaboride (CaB 6 ) nanowires for analysis of hydrogen storage materials. Catalyst assisted growth of nanowires under the Vapor-Liquid-Solid synthesis method was performed in a quartz tube furnace. The pyrolysis of diborane (B 2 H 6 ) gas over calcium oxide (CaO) powders with a thermally coated layer of nickel catalyst was carried out. SEM and TEM analysis have shown the generation of nanowires although calcium and boron did not react in a 1:6 ratio, though 1:4 and 1:8 ratios were achieved. Several types of nanowire compositions were found under EELS and EDX analyses, including calcium and oxygen coated boron nanowires. Overall, it was found that a decrease in the amount of nickel catalyst used is correlated to a decrease in the diameters of the nanowires. A higher diborane gas flow rate into the reaction chamber was also correlated to more abundant nanostructures in the sample.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"253 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114649894","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
Fabrication of Oxygenation Microfluidic Devices for Cell Cultures 细胞培养氧化微流控装置的研制
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 1900-01-01 DOI: 10.5210/JUR.V7I1.7524
Shauharda Khadka, Gerardo Mauleon, D. Eddington
{"title":"Fabrication of Oxygenation Microfluidic Devices for Cell Cultures","authors":"Shauharda Khadka, Gerardo Mauleon, D. Eddington","doi":"10.5210/JUR.V7I1.7524","DOIUrl":"https://doi.org/10.5210/JUR.V7I1.7524","url":null,"abstract":"Current cell culture procedures that use normoxic (21%) oxygen concentrations have been proven to be physiologically inaccurate since the oxidation conditions in the human body ranges mostly between 1-13%. Recent studies have acknowledged this fact and have begun utilizing microfluidic devices to create an oxygen gradient to accurately depict the human physiology. While these studies have taken a step in the right direction, the gradient achieved is rather steep posing a spatial constraint in accurate testing. In order to address this problem we have fabricated microfluidic devices of five different specialized micro-channel architectures and tested them to find the optimal low rise oxygen gradient. Through fabrication and testing of multiple batches, we have determined that one of our specialized micro-channel designs (Architecture 3) has successfully produced a low rise oxygen gradient that provides ample spatial resolution to accurately pinpoint oxygen concentrations of interest, paving the way to improve the accuracy of cell culture techniques.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132491743","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
Analysis of Ferromagnetic-Multiferroic Interfaces in Epitaxial Multilayers of LSMO and BFO LSMO和BFO外延多层材料中铁磁-多铁界面分析
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 1900-01-01 DOI: 10.5210/JUR.V6I1.7518
P. Knapp, J. Abiade
{"title":"Analysis of Ferromagnetic-Multiferroic Interfaces in Epitaxial Multilayers of LSMO and BFO","authors":"P. Knapp, J. Abiade","doi":"10.5210/JUR.V6I1.7518","DOIUrl":"https://doi.org/10.5210/JUR.V6I1.7518","url":null,"abstract":"Bilayers were fabricated from ferromagnetic LSMO (Lanthanum Strontium Manganate Oxide, La 0.7 Sr 0.3 MnO 3 ) and ferroelectric BFO (Bismuth Ferrite, BiFeO 3 ) using pulsed laser deposition in the presence of O 2  on LaAlO 3 and SrTiO 3  substrates. The layer thickness and the layer order were varied among 16 samples. The bilayers were analyzed using TEM, XRD, XRR, and XPS to determine the stoichiometry, interlayer diffusion, roughness, and other structural features. TEM imaging showed that portions of the bilayers were highly crystalline. However, XRD analysis demonstrated that the majority of films were amorphous, with some polycrystalline and nanocrystalline samples. XRR data indicated a high roughness but did not yield good thickness values. Finally, XPS confirmed that material stoichiometry was preserved. It appears that the deposition process still needs optimization. This research will serve as the basis for future experiments on the magnetic properties of LSMO/BFO bilayers.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124354894","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
Tunability of Atomic Layer Deposition of Yttria-Stabilized Zirconium Oxide for use in Solid Oxide Fuel Cells 用于固体氧化物燃料电池的钇稳定氧化锆原子层沉积的可调性
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 1900-01-01 DOI: 10.5210/JUR.V6I1.7519
A. Walter, R. Xu, G. Jursich, C. Takoudis
{"title":"Tunability of Atomic Layer Deposition of Yttria-Stabilized Zirconium Oxide for use in Solid Oxide Fuel Cells","authors":"A. Walter, R. Xu, G. Jursich, C. Takoudis","doi":"10.5210/JUR.V6I1.7519","DOIUrl":"https://doi.org/10.5210/JUR.V6I1.7519","url":null,"abstract":"Thin films of yttria-stabilized zirconium oxide (YSZ) were successfully deposited using atomic layer deposition (ALD) for use in solid oxide fuel cells (SOFCs). YSZ was deposited on p-Si(100) by ALD using Tris(isopropyl-cyclopentadienyl)yttrium [(iPrCp)3Y] and tris(dimethylamino)cyclopentadienylzirconim [ZyALD] as metal precursors and ozone as oxidant. The normalized ALD cycle ratio of yttria cycles / total cycles used in making these films was varied to investigate the tunability of this process. Spectral ellipsometry was used to measure the thickness of the films. X-ray photoelectron spectroscopy (XPS) analyses were used to evaluate the composition and binding environments of as-deposited YSZ films. The normalized cycle ratio and the yttrium atomic percentage (Y atoms / metal atoms) have a linear relationship with a strong correlation, implying excellent tunability for this process. The binding environment analyses determine the oxidation state of the metals and show that decreasing the cycle ratio decreases the extent of yttrium hydroxidation.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116978202","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
Flow of Carbon Nanotubes under pressure driven conditions through microchannels 压力驱动条件下碳纳米管在微通道中的流动
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 1900-01-01 DOI: 10.5210/JUR.V6I1.7522
Hari Sriram, S. Sinha-Ray, A. Yarin
{"title":"Flow of Carbon Nanotubes under pressure driven conditions through microchannels","authors":"Hari Sriram, S. Sinha-Ray, A. Yarin","doi":"10.5210/JUR.V6I1.7522","DOIUrl":"https://doi.org/10.5210/JUR.V6I1.7522","url":null,"abstract":"In this work, the flow characteristics of suspensions of Carbon Nanotube (CNT) concentrations have been flown through microchannels under a pressure gradient. The suspensions of CNTs were made using sodium dodecylbenzenesulfonate (NaDDBS) as a surfactant. Flow rate of wax intercalated Carbon Nanotubes were also investigated, which will be extended for studying heat transfer characteristics of these nanoencapsulated Phase Change materials (PCMs) under a constant heat flux at the walls of the microchannel.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133867897","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
Selective Oxidation of Ammonia on Ruthenium to Form p(2 x 2) Nitrogen Layer 氨在钌上选择性氧化形成p(2 × 2)氮层
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 1900-01-01 DOI: 10.5210/JUR.V6I1.7512
S. Balgooyen, I. Waluyo
{"title":"Selective Oxidation of Ammonia on Ruthenium to Form p(2 x 2) Nitrogen Layer","authors":"S. Balgooyen, I. Waluyo","doi":"10.5210/JUR.V6I1.7512","DOIUrl":"https://doi.org/10.5210/JUR.V6I1.7512","url":null,"abstract":"Oxidation of ammonia was used to prepare a p(2 x 2) nitrogen layer on the Ru(0001) surface as verified by temperature-programmed desorption (TPD) and low energy electron diffraction (LEED). The process takes place in an ultra-high vacuum (UHV) chamber. The surface is precovered with oxygen and then exposed to ammonia at low temperature. Upon heating, the ammonia is oxidized to form water, which desorbs at low temperature to leave a nitrogencovered surface. The resulting layer can be used in a variety of surface chemical studies, including a hydrogenation reaction, which is an important part in the study of the Haber-Bosch process, in which ruthenium is used as a catalyst.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133889275","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
Solvent Selection for Carbon Capture from Emissions of Coal Fired Power Plants 燃煤电厂碳捕集的溶剂选择
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 1900-01-01 DOI: 10.5210/JUR.V6I1.7516
E. Gennis, U. Dikewar
{"title":"Solvent Selection for Carbon Capture from Emissions of Coal Fired Power Plants","authors":"E. Gennis, U. Dikewar","doi":"10.5210/JUR.V6I1.7516","DOIUrl":"https://doi.org/10.5210/JUR.V6I1.7516","url":null,"abstract":"Approximately 41% of electric power across the globe is generated by the combustion of coal.1 Over the past 40 years many countries have passed legislation that define legally acceptable rates of pollution. Emission rates of sulfurous oxides and nitrous oxides have been hindered, but large amounts of carbon dioxide are still being released into the atmosphere. It is possible to chemically absorb the carbon dioxide gas into a liquid solvent but an effective and economical solvent must be selected.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130201220","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
Analyzing the behavior of normoxic and hypoxic cells through the use of microfluidic devices 利用微流控装置分析常氧和缺氧细胞的行为
The Journal of Undergraduate Research at the University of Illinois at Chicago Pub Date : 1900-01-01 DOI: 10.5210/JUR.V6I1.7513
Kellen Chen, M. Rexius, D. Eddington
{"title":"Analyzing the behavior of normoxic and hypoxic cells through the use of microfluidic devices","authors":"Kellen Chen, M. Rexius, D. Eddington","doi":"10.5210/JUR.V6I1.7513","DOIUrl":"https://doi.org/10.5210/JUR.V6I1.7513","url":null,"abstract":"Current cellular exposure to atmospheric normoxic (21%) oxygen concentrations have been proven to be physiologically inaccurate since the human body only ranges between 1%-13% in the body. We wish to observe how human mesenchymal stem cells (hMSCs) and human lung micro vascular endothelial cells (HLMVECs) interact with one another and their behavior when exposed to either hypoxic (defined as being less than normoxic) or atmospheric normoxic concentrations. The cells were grown and cultured on microfluidic devices - a relatively cheap and easily fabricated method of experimental testing that can lend itself to mass production and cellular analysis techniques. The analyses mainly focus on quantifying the amount of hypoxia-inducible factor-1 (HIF-1) present in the cells - this factor is responsible for activating countless transcription factors within the cell. Overall, these methods and tests have provided evidence to the fact that hypoxic conditions increase cellular growth, migration, proliferation, and growth factor production by almost two times.","PeriodicalId":426348,"journal":{"name":"The Journal of Undergraduate Research at the University of Illinois at Chicago","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122988048","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
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