Akhil Raman T. S., Shivakumar Chedurupalli, James Raju K. C.
{"title":"Low-temperature crystallization of BST thin films on RT/Duroid substrate for tunable microwave devices","authors":"Akhil Raman T. S., Shivakumar Chedurupalli, James Raju K. C.","doi":"10.1117/12.2645993","DOIUrl":"https://doi.org/10.1117/12.2645993","url":null,"abstract":"Barium strontium titanate (BST-Ba0.5Sr0.5TiO3) thin films are deposited over RT/Duroid substrate at a temperature of 250°C and are then crystallized by laser annealing. The laser annealed films are XRD crystalline. The microwave dielectric properties are measured by fabricating circular patch capacitor (CPC) using these dielectric films and a maximum tunability of 34% is obtained. Thus, integrated monolithic varactors on a polymer composite substrate exploiting the electric fielddependent dielectric constant exhibited by crystalline ferroelectric thin films are demonstrated.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114401685","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}
Carlos Rodriguez-Benites, C. Luyo, J. M. Montes de Oca-Ávalos, S. A. Bilmes, W. Estrada, Juan M. Rodriguez
{"title":"CoFe2O4@SiO2@TiO2 core-shell nanoparticles for photocatalytic water decontamination","authors":"Carlos Rodriguez-Benites, C. Luyo, J. M. Montes de Oca-Ávalos, S. A. Bilmes, W. Estrada, Juan M. Rodriguez","doi":"10.1117/12.2647113","DOIUrl":"https://doi.org/10.1117/12.2647113","url":null,"abstract":"In the present work is reported, following a facile process, the synthesis of cobalt ferrite nanoparticles covered with a shell of SiO2, and then, covered with a shell of TiO2. In the first step, cobalt ferrite nanoparticles were prepared by coprecipitation of Co+2 and Fe +2 ions in basic medium, followed by a simple controlled oxidation process carried out by nitrate ions in basic medium with inert atmosphere at 95°C for 24h. In the second step, SiO2 particles were deposited by heterogeneous nucleation onto the surface of the ferrite in alcohol medium by alkalinization of tetraethylortosilane solutions, finally, in the third step, the TiO2 shell film is deposited by using sol-gel technique. Characterization techniques were performed to determine the particle morphology and size distribution (Scanning electron microscopy), crystalline structure (X-ray diffraction). Results showed that cobalt ferrite nanoparticles can be obtained following this synthesis route without using surfactants as size drivers, which is a common reagent in nanoparticle preparation, giving a size distribution of 162 ± 30 nm and a polyhedral geometry. Also, it was observed that SiO2 is homogeneously distributed onto the surface of the cobalt ferrite, and that TiO2 shell films covered well, creating a catalyst that also presents magnetic response. This kind of catalyst nanomaterial, presents a magnetic response, and is a stable and environmentally safe, then could be separated easily from the aqueous medium at the end of the purification process by applying an external magnetic field.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128771614","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":"Bio-mimetic nanostructured thin films for surface-active devices","authors":"Wen-Hung Wang, S. Mukhopadhyay","doi":"10.1117/12.2647658","DOIUrl":"https://doi.org/10.1117/12.2647658","url":null,"abstract":"Nano-scale materials are known to offer significant advantages in surface activity and quantum effects, but their integration into thin-films for interactive devices is often limited by the surface area of the film, and the tendency of nanocomponents to proliferate into the environment. Many natural living systems address these challenges through elegant hierachical surface architectures such as microvilli and dendrites, where a larger substrate is covalently anchored to progressively smaller functional entities. This three-dimensional surface design offers exceptionally high levels of solid-fluid interaction in very compact space for important functions such as electrical/thermal transport, bio-scaffolding, adsorption and catalysis. However, this architecture has been traditionally avoided in engineered devices due to the complexities of creating strong primary bonds between components having different size, shape and compositions to form a durable integrated solid. In recent years, advances in surface engineering and nanoscale processing have made fabrication of these types of surface coatings possible in our laboratory, which provide several advantages over conventional films. This talk will present processing-structure-property relationships of some of these materials with special emphasis on three selected applications: micro fluidic devices, solid state heat exchangers for power electronics, and pollutant degradation membranes.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121412330","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":"Atomic force microscopy electrostatic nanolithography (AFMEN): a versatile tool for nano-patterning in thin films and beyond","authors":"S. Lyuksyutov","doi":"10.1117/12.2646087","DOIUrl":"https://doi.org/10.1117/12.2646087","url":null,"abstract":"A variety of materials can be used for the AFMEN including exfoliated graphene, Si (100) treated with solvents, polymer films, and styrene butadiene rubber. This simple one-two stage approach is a tool to pattern almost any semiconductor or dielectric surface at the nanoscale.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127911457","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":"Growth of Ge1-xSnx alloys for MWIR sensing applications","authors":"B. Claflin, G. Grzybowski, J. Duran","doi":"10.1117/12.2647373","DOIUrl":"https://doi.org/10.1117/12.2647373","url":null,"abstract":"Films of Ge1-xSnx have been grown on Ge, Si, and Al2O3 substrates by remote plasmaenhanced chemical vapor deposition with Sn concentrations greater than 10% and thicknesses greater than 1 μm. Characterization data of the structural, optical, and electrical properties of these alloys are presented. Device characteristics from planar photoconductor and vertical p-n devices grown directly on Si substrates show promise for future MWIR sensing applications.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131587451","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":"Development and evaluation of an autonomous and portable solar water disinfection reactor based on TiO2 supported films","authors":"E. Carpio, S. Ponce, Juan M. Rodriguez","doi":"10.1117/12.2647950","DOIUrl":"https://doi.org/10.1117/12.2647950","url":null,"abstract":"The lack of drinkable water in rural areas or in places affected by natural disasters, motivated us to develop an efficient way to obtain drinking water. In this work we will present the development of an autonomous and portable water purification plant, based on a supported TiO2 film reactor, to promote the photocatalytic disinfection of bacteria in water. It is concluded that the supported TiO2 film onto a polyethylene based reactor shows good photocatalytic disinfect water under laboratory conditions and land field experiments. At the laboratory, up to 6 orders of magnitude of E-coli were reduced in less than 30 min, whereas under real conditions, water contaminated with 3480 CFU/100 mL of wild bacteria colonies, the disinfection was reached in less than 15 min. This System could be used in places in which safe drinking water is not available, like in rural areas, or under situations in which access to water through centralized public services are temporarily suspended, as for example after a natural disaster.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114304327","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}
Laura Davidson, R. Aga, F. Ouchen, Twinkle Pandhi, C. Bartsch, E. Heckman
{"title":"Conductivity effects on printed RF interconnects due to printed dielectric ramps","authors":"Laura Davidson, R. Aga, F. Ouchen, Twinkle Pandhi, C. Bartsch, E. Heckman","doi":"10.1117/12.2646142","DOIUrl":"https://doi.org/10.1117/12.2646142","url":null,"abstract":"In this work we build upon a previously published technique for printing dielectric ramps and printed RF interconnects across leveled surfaces to gain a better understanding of the effects that the dielectric material itself has on the conductivity of the printed conductive ink. The use of printed dielectric ramps, referred to as fillets, to assist in additively manufactured RF circuits and interconnects can be found throughout literature. One of the most widely used materials for these ramps, the UV-curable adhesive NEA-121, was found to exhibit physical changes when exposed to high curing temperatures and to have a significant effect on the conductivity of a wide variety of commercially available conductive ink materials; in some cases causing a 2x drop in conductivity compared with the expected conductivity reported by the manufacturer. We report on the conductivity effects from printing on the NEA-121 dielectric surface for three commercially available Ag inks for an RF circuit application and report the manufacturing techniques necessary to optimize both the dielectric ramp and the conductive ink performance.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129724378","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":"Cluster formation and charge transfer in molecular doping of molybdenum disulfide","authors":"Jonghoon Lee, G. Kedziora, N. Glavin, A. Roy","doi":"10.1117/12.2644983","DOIUrl":"https://doi.org/10.1117/12.2644983","url":null,"abstract":"Molybdenum disulfide (MoS2) gas sensor prototypes report orders of magnitude higher sensitivity towards nitrogen dioxide (NO2) over ammonia (NH3). Based on the cluster formation model and density functional theory calculation of charge transfer, NO2 is found to form a tightly bound cluster of counter charge upon carrier donation. On the other hand, NH3 forms only a semi-localized cluster of counter charge over wide area MoS2, which should promote recombination of donated carrier. We report the localization of counter charge cluster as an important factor affecting molecular doping efficiency.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122539721","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":"Magnetoelectric thin films by solution methods","authors":"M. Jain","doi":"10.1117/12.2647655","DOIUrl":"https://doi.org/10.1117/12.2647655","url":null,"abstract":"Magnetoelectric (ME) multiferroics (MFs) materials, which exhibit electric order and some magnetic order, are of great interest for memory, energy harvesting, and sensing applications. Such ME MFs can be :(i) single-phase MFs and (ii) biphasic MFs. In this work, structural, ferroelectric, magnetic and ME properties of thin films of both type of ME MFs were studied. Facile and cost-effective solution-methods were used to fabricate thin films and nanocomposites of ME MF materials. The single-phase DyCrO3 and GdFe0.5Cr0.5O3 thin films showed magnetically induced dielectric behavior and independent magnetic/electric orders, respectively. In biphasic nanocomposites, concentration and connectivity of two phases play an important role in defining the ME coupling that is mediated through mechanical strain at the interfaces between the two phases. The ME switching and coupling behavior in the nanocomposite PbZr0.52Ti0.48O3:CoFe2O4 thin films will be presented in detail.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131277080","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":"Interface-engineered barium hexaferrite-wide-bandgap semiconductor integration enabling 5G system-on-wafer solutions","authors":"V. Harris, P. Andalib","doi":"10.1117/12.2646468","DOIUrl":"https://doi.org/10.1117/12.2646468","url":null,"abstract":"Transition from fourth to fifth generation wireless technologies requires a shift from 2.3 GHz to Ka-band with the promise of revolutionary increases in data handling capacity and transfer rates at greatly reduced latency among other benefits. A key enabling technology is the integration of Ka-band massive multiple input–multiple output (m-MIMO) antenna arrays. m-MIMO array elements simultaneously transmit and receive (STAR) data providing true full duplexing in time and frequency domains. A necessary innovation calls for the integration of device quality Ka-ferrites with wide-bandgap (WBG) semiconductor heterostructures allowing for system on-wafer solutions. Here, we report results of systematic studies of pulsed laser deposited (PLD) barium hexaferrite (BaM) films on industrial compatible WBG semiconductor heterostructures suitable for operation in Ka-band circulators.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114012858","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}