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https://www.readbyqxmd.com/read/28448114/comparison-of-ag-in-ga-se2-mo-and-cu-in-ga-se2-mo-interface-in-solar-cells
#1
Xianfeng Zhang, Masakazu Kobayashi
Junction of Ag(In, Ga)Se2 (AIGS)/Mo and Cu(In, Ga)Se2 (CIGS)/Mo were characterized and compared from the prospect of structural and electrical properties. The region between CIGS and Mo was filled by a layered hexagonal MoSe2 layer with a thickness of 10-15 nm. The c-axis of MoSe2 was mostly perpendicular with the Mo layer, while the c value was 12.6 Å. However, no such layer was observed at the interface of AIGS and Mo. The result was also confirmed by the energy dispersive x-ray spectrometer and x-ray diffraction pattern to confirm status of MoSe2 layer...
April 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28443340/e-cigs-are-they-cool-talking-to-teens-about-e-cigarettes
#2
Vania Modesto-Lowe, Camille Alvarado
Electronic cigarettes, or e-cigarettes as they are commonly called, have gained wide acceptance among adolescents, especially those with sweet flavors such as bubble gum and cheesecake. Although health effects of e-cigarettes have not been well characterized, their use increases a teen's exposure to nicotine and may serve as a gateway to traditional cigarettes. This article outlines the basics of e-cigarettes and potential health hazards, followed by selected literature on teens' perceptions of e-cigarettes, as well as motivational interviewing strategies that can be used in talking to teens about using electronic cigarettes...
April 1, 2017: Clinical Pediatrics
https://www.readbyqxmd.com/read/28430435/cu-in-halide-perovskite-cihp-solar-absorbers
#3
Xin-Gang Zhao, Dongwen Yang, Yuanhui Sun, Tianshu Li, Lijun Zhang, Liping Yu, Alex Zunger
The long-term chemical instability and the presence of toxic Pb in otherwise stellar solar absorber APbX3 made of organic molecules on the A site and halogens for X have hindered their large-scale commercialization. Previously explored ways to achieve Pb-free halide perovskites involved replacing Pb(2+) with other similar M(2+) cations in ns(2) electron configuration, e.g., Sn(2+) or by Bi(3+) (plus Ag(+)), but unfortunately this showed either poor stability (M = Sn) or weakly absorbing oversized indirect gaps (M = Bi), prompting concerns that perhaps stability and good optoelectronic properties might be contraindicated...
April 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28422510/halide-perovskites-for-tandem-solar-cells
#4
Jin-Wook Lee, Yao-Tsung Hsieh, Nicholas De Marco, Sang-Hoon Bae, Qifeng Han, Yang Yang
Perovskite solar cells have become one of the strongest candidates for next-generation solar energy technologies. A myriad of beneficial optoelectronic properties of the perovskite materials have enabled superb power conversion efficiencies (PCE) exceeding 22% for a single-junction device. The high PCE achievable via low processing costs and relatively high variability in optical properties have opened new possibilities for perovskites in tandem solar cells. In this Perspective, we will discuss current research trends in fabricating tandem perovskite-based solar cells in combination with a variety of mature photovoltaic devices such as organic, silicon, and Cu(In,Ga)(S,Se)2 (CIGS) solar cells...
April 24, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28406026/multiple-color-generating-cu-in-ga-s-se-2-thin-film-solar-cells-via-dichroic-film-incorporation-for-power-generating-window-applications
#5
Gang Yeol Yoo, Jae-Seung Jeong, Soyoung Lee, Youngki Lee, Hee Chang Yoon, Van Ben Chu, Gi Soon Park, Yun Jeong Hwang, Woong Kim, Byoung Koun Min, Young Rag Do
There are four prerequisites when applying all types of thin-film solar cells to power-generating window photovoltaics (PVs): high power-generation efficiency, longevity and high durability, semitransparency or partial-light transmittance, and colorful and aesthetic value. Solid-type thin-film Cu(In,Ga)S2 (CIGS) or Cu(In,Ga)(S,Se)2 (CIGSSe) PVs nearly meet the first two criteria, making them promising candidates for power-generating window applications if they can transmit light to some degree and generate color with good aesthetic value...
April 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28401252/evaluation-of-ventricular-septal-defect-with-special-reference-to-the-spontaneous-closure-rate-subaortic-ridge-and-aortic-valve-prolapse-ii
#6
Ayse Guler Eroglu, Sezen Ugan Atik, Esma Sengenc, Gulnaz Cig, Irfan Levent Saltik, Funda Oztunc
The medical records of 2283 patients with ventricular septal defect (VSD) were reviewed to determine spontaneous closure, left ventricular-to-right atrial shunt, subaortic ridge, and aortic valve prolapse. One thousand eight hundred and twenty-three patients had been followed 1 month to 26 years (median 4 years) by echocardiography. Most of 460 patients could not be followed due to transportation of the institution. VSD was perimembranous in 68.8% (1255), trabecular muscular in 21.7% (395), muscular outlet in 6% (109), muscular inlet in 2...
April 12, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28389330/a-comparison-of-nicotine-dependence-among-exclusive-e-cigarette-and-cigarette-users-in-the-path-study
#7
Guodong Liu, Emily Wasserman, Lan Kong, Jonathan Foulds
Electronic cigarettes ("e-cigs") have recently gained in popularity, but their health risks, including dependence potential are unclear. This study analyzed the adult database from the Wave 1 Population Assessment of Tobacco and Health (PATH) Study, a nationally representative survey of tobacco use in the United States, to assess the relative level of dependence among adult, exclusive everyday users of e-cigarettes and cigarettes. Of the total 32,320 observations from the Wave 1 PATH adult database, 3586 (5...
April 4, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28383488/breakthrough-to-non-vacuum-deposition-of-single-crystal-ultra-thin-homogeneous-nanoparticle-layers-a-better-alternative-to-chemical-bath-deposition-and-atomic-layer-deposition
#8
Yu-Kuang Liao, Yung-Tsung Liu, Dan-Hua Hsieh, Tien-Lin Shen, Ming-Yang Hsieh, An-Jye Tzou, Shih-Chen Chen, Yu-Lin Tsai, Wei-Sheng Lin, Sheng-Wen Chan, Yen-Ping Shen, Shun-Jen Cheng, Chyong-Hua Chen, Kaung-Hsiung Wu, Hao-Ming Chen, Shou-Yi Kuo, Martin D B Charlton, Tung-Po Hsieh, Hao-Chung Kuo
Most thin-film techniques require a multiple vacuum process, and cannot produce high-coverage continuous thin films with the thickness of a few nanometers on rough surfaces. We present a new "paradigm shift" non-vacuum process to deposit high-quality, ultra-thin, single-crystal layers of coalesced sulfide nanoparticles (NPs) with controllable thickness down to a few nanometers, based on thermal decomposition. This provides high-coverage, homogeneous thickness, and large-area deposition over a rough surface, with little material loss or liquid chemical waste, and deposition rates of 10 nm/min...
April 6, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28374745/evolution-of-opto-electronic-properties-during-film-formation-of-complex-semiconductors
#9
M D Heinemann, R Mainz, F Österle, H Rodriguez-Alvarez, D Greiner, C A Kaufmann, T Unold
Optical and electrical properties of complex semiconducting alloys like Cu(In,Ga)Se2 (CIGS) are strongly influenced by the reaction pathways occurring during their deposition process. This makes it desirable to observe and control these properties in real-time during the deposition. Here we show for the first time the evolution of the band gap and the sub-band-gap defect absorption of CIGS thin film as well as surface roughness during a three-stage co-evaporation process by means of an optical analysis technique, based on white light reflectometry (WLR)...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28355200/electronic-cigarette-use-was-not-associated-with-quitting-of-conventional-cigarettes-in-youth-smokers
#10
Man Ping Wang, William H Li, Yongda Wu, Tai Hing Lam, Sophia S Chan
BACKGROUND: To investigate the association between electronic cigarette (e-cig) use and smoking cessation among smokers who called the Youth Quitline in Hong Kong. METHODS: This longitudinal study collected data on youth smokers' (N=189) use and perception of e-cigs, conventional cigarette smoking behavior and socio-demographic characteristics at baseline. Self-reported past 7-day point prevalence of abstinence (PPA) was assessed at the 6-month telephone follow-up...
March 29, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28347441/assessment-of-a-personalized-and-distributed-patient-guidance-system
#11
Mor Peleg, Yuval Shahar, Silvana Quaglini, Tom Broens, Roxana Budasu, Nick Fung, Adi Fux, Gema García-Sáez, Ayelet Goldstein, Arturo González-Ferrer, Hermie Hermens, M Elena Hernando, Val Jones, Guy Klebanov, Denis Klimov, Daniel Knoppel, Nekane Larburu, Carlos Marcos, Iñaki Martínez-Sarriegui, Carlo Napolitano, Àngels Pallàs, Angel Palomares, Enea Parimbelli, Belén Pons, Mercedes Rigla, Lucia Sacchi, Erez Shalom, Pnina Soffer, Boris van Schooten
OBJECTIVES: The MobiGuide project aimed to establish a ubiquitous, user-friendly, patient-centered mobile decision-support system for patients and for their care providers, based on the continuous application of clinical guidelines and on semantically integrated electronic health records. Patients would be empowered by the system, which would enable them to lead their normal daily lives in their regular environment, while feeling safe, because their health state would be continuously monitored using mobile sensors and self-reporting of symptoms...
May 2017: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/28337465/inflammatory-response-and-barrier-dysfunction-by-different-e-cigarette-flavoring-chemicals-identified-by-gas-chromatography-mass-spectrometry-in-e-liquids-and-e-vapors-on-human-lung-epithelial-cells-and-fibroblasts
#12
Janice Gerloff, Isaac K Sundar, Robert Freter, Emily R Sekera, Alan E Friedman, Risa Robinson, Todd Pagano, Irfan Rahman
Recent studies suggest that electronic cigarette (e-cig) flavors can be harmful to lung tissue by imposing oxidative stress and inflammatory responses. The potential inflammatory response by lung epithelial cells and fibroblasts exposed to e-cig flavoring chemicals in addition to other risk-anticipated flavor enhancers inhaled by e-cig users is not known. The goal of this study was to evaluate the release of the proinflammatory cytokine (interleukin-8 [IL-8]) and epithelial barrier function in response to different e-cig flavoring chemicals identified in various e-cig e-liquid flavorings and vapors by chemical characterization using gas chromatography-mass spectrometry analysis...
March 1, 2017: Applied in Vitro Toxicology
https://www.readbyqxmd.com/read/28330186/a-comprehensive-study-of-one-step-selenization-process-for-cu-in1-x-ga-x-se2-thin-film-solar-cells
#13
Shih-Chen Chen, Sheng-Wen Wang, Shou-Yi Kuo, Jenh-Yih Juang, Po-Tsung Lee, Chih Wei Luo, Kaung-Hsiung Wu, Hao-Chung Kuo
In this work, aiming at developing a rapid and environmental-friendly process for fabricating CuIn1-x Ga x Se2 (CIGS) solar cells, we demonstrated the one-step selenization process by using selenium vapor as the atmospheric gas instead of the commonly used H2Se gas. The photoluminescence (PL) characteristics indicate that there exists an optimal location with superior crystalline quality in the CIGS thin films obtained by one-step selenization. The energy dispersive spectroscopy (EDS) reveals that the Ga lateral distribution in the one-step selenized CIGS thin film is intimately correlated to the blue-shifted PL spectra...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28327447/effect-of-motivational-interviewing-on-depression-scale-scores-of-adolescents-with-obesity-and-overweight
#14
Silvia Freira, Marina Serra Lemos, Geoffrey Williams, Marta Ribeiro, Fernanda Pena, Maria do Céu Machado
The aim of this study was to compare the effect of motivational interview (MI) with conventional care on the depression scale scores of adolescents with obesity/overweight. It was a controlled cluster randomized trial with parallel design, including two groups: intervention group [Motivational Interview Group (MIG)], control group [Conventional Intervention Group (CIG)]. INTERVENTION: three face-to-face 30min' interviews three months apart (only MIG interviews were based on MI principles)...
March 12, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28296556/beliefs-about-the-direct-comparison-of-e-cigarettes-and-cigarettes
#15
Alexandra R Hershberger, Kenny A Karyadi, J Davis VanderVeen, Melissa A Cyders
BACKGROUND: Recent data suggests that positive beliefs about electronic cigarettes (e-cigs) use can lead to later e-cig use. Considering that many advertisements claim that e-cigs are superior to cigarettes, individuals' likelihood to view e-cigs more favorably than cigarettes can also influence subsequent e-cig use; however, no studies have directly assessed such a comparison. OBJECTIVES: The present study created and validated the Comparing E-Cigarettes and Cigarettes questionnaire (CEAC), which asks individuals to directly compare e-cigs and cigarettes on a number of dimensions, in two independent samples...
March 15, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28289597/daily-users-compared-to-less-frequent-users-find-vape-as-or-more-satisfying-and-less-dangerous-than-cigarettes-and-are-likelier-to-use-non-cig-alike-vaping-products
#16
Lynn T Kozlowski, D Lynn Homish, Gregory G Homish
We assessed the roles of perceived satisfaction and perceived danger and vaping-product-type as correlates of more frequent use of vaping products. In a baseline assessment of a longitudinal study of US Army Reserve/National Guard Soldiers and their partners (New York State, USA, 2014-2016), participants were asked about current use of vaping products (e-cigarettes) and perceived satisfaction and danger in comparison to cigarettes as well as type of product used. Fisher-exact tests and multiple ordinal logistic regressions were used...
June 2017: Preventive Medicine Reports
https://www.readbyqxmd.com/read/28281352/crystalline-engineering-toward-large-scale-high-efficiency-printable-cu-in-ga-se2-thin-film-solar-cells-on-flexible-substrate-by-femtosecond-laser-annealing-process
#17
Shih-Chen Chen, Nian-Zu She, Kaung-Hsiung Wu, Yu-Ze Chen, Wei-Sheng Lin, Jia-Xing Li, Fang-I Lai, Jenh-Yih Juang, Chih Wei Luo, Lung-Teng Cheng, Tung-Po Hsieh, Hao-Chung Kuo, Yu-Lun Chueh
Ink-printing method emerges as a viable way for manufacturing large-scale flexible Cu(In,Ga)Se2 (CIGS) thin film photovoltaic (TFPV) devices owing to its potential for the rapid process, mass production, and low-cost nonvacuum device fabrication. Here, we brought the femtosecond laser annealing (fs-LA) process into the ink-printing CIGS thin film preparation. The effects of fs-LA treatment on the structural and optoelectronic properties of the ink-printing CIGS thin films were systematically investigated. It was observed that, while the film surface morphology remained essentially unchanged under superheating, the quality of crystallinity was significantly enhanced after the fs-LA treatment...
April 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28275663/dataset-demonstrating-the-modeling-of-a-high-performance-cu-in-ga-se2-absorber-based-thin-film-photovoltaic-cell
#18
Md Asaduzzaman, Ali Newaz Bahar, Mohammad Maksudur Rahman Bhuiyan
The physical data of the semiconductor materials used in the design of a CIGS absorber based thin film photovoltaic cell have been presented in this data article. Besides, the values of the contact parameter and operating conditions of the cell have been reported. Furthermore, by conducting the simulation with data corresponding to the device structure: soda-lime glass (SLG) substrate/Mo back-contact/CIGS absorber/CdS buffer/intrinsic ZnO/Al-doped ZnO window/Al-grid front-contact, the solar cell performance parameters such as open circuit voltage [Formula: see text], short circuit current density [Formula: see text], fill factor [Formula: see text], efficiency [Formula: see text], and collection efficiency [Formula: see text] have been analyzed...
April 2017: Data in Brief
https://www.readbyqxmd.com/read/28272224/high-expression-of-sall4-and-fascin-and-loss-of-e-cadherin-expression-in-undifferentiated-dedifferentiated-carcinomas-of-the-endometrium-an-immunohistochemical-and-clinicopathologic-study
#19
Semen Onder, Orhun Cig Taskin, Fatma Sen, Samet Topuz, Seden Kucucuk, Hamdullah Sozen, Ridvan Ilhan, Sitki Tuzlali, Ekrem Yavuz
Undifferentiated/dedifferentiated endometrial carcinomas (UCE/DCEs) of the endometrium are rare tumors with poor prognosis. There are few clinicopathologic studies with detailed immunohistochemical analysis regarding UCE/DCEs.We evaluated the diagnostic value of a selected tumor stem-cell marker and epithelial-mesenchymal transition (EMT) markers, in addition to previously studied markers in identifying UCE/DCEs from other types of high-grade endometrial carcinomas.Eleven cases of UCE/DCEs with complete clinical follow-up that were diagnosed between 2006 and 2015 were included in the study...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28265711/simultaneous-analysis-of-nine-aromatic-amines-in-mainstream-cigarette-smoke-using-online-solid-phase-extraction-combined-with-liquid-chromatography-tandem-mass-spectrometry
#20
Jie Zhang, Ruoshi Bai, Zhaojuan Zhou, Xingyu Liu, Jun Zhou
A fully automated analytical method was developed and validated by this present study. The method was based on two-dimensional (2D) online solid-phase extraction liquid chromatography-tandem mass spectrometry (SPE-LC-MS/MS) to determine nine aromatic amines (AAs) in mainstream smoke (MSS) simultaneously. As a part of validation process, AAs yields for 16 top-selling commercial cigarettes from China market were evaluated by the developed method under both Health Canada Intensive (HCI) and ISO machine smoking regimes...
April 2017: Analytical and Bioanalytical Chemistry
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