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https://www.readbyqxmd.com/read/28544657/a-strategy-to-enhance-the-efficiency-of-quantum-dot-sensitized-solar-cells-by-decreasing-the-electron-recombinations-with-polyoxometalate-tio2-as-the-electronic-interface-layer
#1
Li Chen, Wei-Lin Chen, Jian-Ping Li, Jia-Bo Wang, En-Bo Wang
The serious electron recombination occurring in TiO2/quantum dot sensitizer/electrolyte interface is the key reason for hindering the further efficiency improvement of QDSCs. Polyoxometalate(POM) can be as electron transfer media to decreasing electron recombination of photoelectric device, which is due to the excellent oxidation reduction properties and thermostability. So in this paper, POM/TiO2 electronic interface layer prepared by a simple layer-by-layer self-assembly method is added between FTO and mesoporous TiO2 in the photoanode of the QDSCs, and their effects on the photovoltaic performance are systematically investigated...
May 23, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28540970/nanostructural-and-photo-electrochemical-properties-of-solution-spin-coated-cu2znsns4-tio2-nanorod-forest-films-with-an-improved-photovoltaic-performance
#2
Zhuoran Wang, Raynald Gauvin, George P Demopoulos
Cu2ZnSnS4 (CZTS), other than in standard p-n junction device architecture, can be employed as a broad light absorber upon coating onto a wide bandgap electron conducting TiO2 film. Earlier CZTS sensitized TiO2 films have yielded low photoconversion efficiency and Voc. In this work, a water-ethanol solution spin coating approach has been applied to directly deposit CZTS nanocrystallites on rutile TiO2 nanorods grown on an FTO substrate (TNR) for evaluation in a sensitized solar cell configuration. The FTO@TNR@CZTS photoanode following controlled annealing is shown to exhibit improved photovoltaic properties...
May 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28539834/complex-relationship-between-obesity-and-the-fat-mass-and-obesity-locus
#3
REVIEW
Qingyun Yang, Tiancun Xiao, Jiao Guo, Zhengquan Su
In the 21st century, obesity has become a serious problem because of increasing obese patients and numerous metabolic complications. The primary reasons for this situation are environmental and genetic factors. In 2007, FTO (fat mass and obesity associated) was the first gene identified through a genome-wide association study (GWAS) associated with obesity in humans. Subsequently, a cluster of single nucleotide polymorphisms (SNPs) in the first intron of the FTO gene was discovered to be associated with BMI and body composition...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28530793/resistive-switching-and-the-local-electric-field-in-the-bi0-85-xpr0-15rexfe0-97mn0-03o3-cufe2o4-re-sr-dy-bilayered-thin-films
#4
Zhongwei Yue, Guoqiang Tan, Huijun Ren, Ao Xia, Dan Shao, Meiyou Guo, Wei Yang, Zhengjun Chai
Bilayer Bi0.85-xPr0.15RExFe0.97Mn0.03O3/CuFe2O4 (BPRExFMO/CuFO, RE=Sr, Dy) thin films were prepared onto FTO/glass substrates by the chemical solution deposition method. The structure transition doesn't appear after ions doping, which is confirmed by XRD and its refined results. The samples remain the trigonal R3c: H structure of BFO phase and tetragonal I41/amd structure of CuFO phase. The asymmetric character of leakage current density curves and resistive switching effects have been explored. And the ions substitution impacts on the resistive switching effects may be due to the existence of the local fields...
May 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28528403/assessing-the-causal-relationship-between-obesity-and-venous-thromboembolism-through-a-mendelian-randomization-study
#5
Sara Lindström, Marine Germain, Marta Crous-Bou, Erin N Smith, Pierre-Emmanuel Morange, Astrid van Hylckama Vlieg, Hugoline G de Haan, Daniel Chasman, Paul Ridker, Jennifer Brody, Mariza de Andrade, John A Heit, Weihong Tang, Immaculata DeVivo, Francine Grodstein, Nicholas L Smith, David Tregouet, Christopher Kabrhel
Observational studies have shown an association between obesity and venous thromboembolism (VTE) but it is not known if observed associations are causal, due to reverse causation or confounding bias. We conducted a Mendelian Randomization study of body mass index (BMI) and VTE. We identified 95 single nucleotide polymorphisms (SNPs) that have been previously associated with BMI and assessed the association between genetically predicted high BMI and VTE leveraging data from a previously conducted GWAS within the INVENT consortium comprising a total of 7507 VTE cases and 52,632 controls of European ancestry...
May 20, 2017: Human Genetics
https://www.readbyqxmd.com/read/28516511/electrochemically-treated-bivo4-photoanode-for-efficient-photoelectrochemical-water-splitting
#6
Lianzhou Wang
BiVO4 films with (040) facet grown vertically on fluorine doped SnO2 (FTO) glass substrates are prepared by a seed-assisted hydrothermal method. A simple electrochemical treatment process drastically enhances the photocatalytic activity of BiVO4, exhibiting a remarkable photocurrent density of 2.5 mA cm-2 at 1.23 V vs. reversible hydrogen electrode (RHE) under AM 1.5 G illumination, which is approximately 10 folds higher than that of the pristine one. Loading cobalt borate (CoBi) as cocatalyst, the photocurrent density of the BiVO4 photoanode can be further improved to 3...
May 17, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28507607/gene-variants-in-the-fto-gene-are-associated-with-adiponectin-and-tnf-alpha-levels-in-gestational-diabetes-mellitus
#7
Renata Saucedo, Jorge Valencia, Claudia Gutierrez, Lourdes Basurto, Marcelino Hernandez, Edgardo Puello, Guadalupe Rico, Gloria Vega, Arturo Zarate
BACKGROUND: Obesity may have a role in the development of gestational diabetes mellitus (GDM). Single-nucleotide-polymorphisms (SNPs) of the FTO (fat mass and obesity associated) gene have been associated with obesity. The aim of this study was to investigate SNPs rs8050136, rs9939609, and rs1421085 of the FTO gene in women with GDM and their associations with maternal pre-pregnancy weight and body mass index, gestational weight gain and mediators of insulin resistance in GDM like leptin, adiponectin, ghrelin and tumor necrosis factor-alpha (TNF-alpha), compared with healthy pregnant controls...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28497832/a-unique-semiconductor-carbon-metal-hybrid-structure-design-as-a-counter-electrode-in-dye-sensitized-solar-cells
#8
Sheng-Qi Guo, Ling-Chang Wang, Chen-Guang Zhang, Gao-Can Qi, Bing-Chuan Gu, Lu Liu, Zhi-Hao Yuan
The catalytic activity of counter electrodes (CEs) severely restricts the photovoltaic conversion efficiency of dye-sensitized solar cells. However, electrons trapped by bulk defects greatly reduce the catalytic activity of the CE. In this study, we report a novel In2S3-C-Au hybrid structure designed by simply decorating Au particles on the surface of carbon-coated hierarchical In2S3 flower-like architectures, which could avoid the abovementioned problems. This effect can be attributed to the unique contribution of indium sulfide, carbon, and Au from the hybrid structure, as well as to their synergy...
May 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28494377/preparation-and-characterization-of-electrodeposited-sns-in-thin-films-effect-of-in-dopant
#9
Hosein Kafashan, Zohre Balak
SnS:In thin films were grown on fluorine doped tin oxide (FTO) substrate by cathodic electrodeposition technique. The solution was containing 2mM SnCl2 and 16mM Na2S2O3 and different amounts of 1mM InCl3 as In-dopant. The pH, bath temperature, deposition time, and deposition potential (E) were fixed at 2.1, 60°C, 30min, and -1V, respectively. The XRD results showed that the synthesized films were polycrystalline orthorhombic SnS. The XPS results demonstrated that the films were composed of Sn, S and In. According to the FESEM images, an increase in In-dopant concentration leads to a change in morphology from grain-like to sheet-like having a nanoscale thickness of 20-80nm and fiber-like...
May 2, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28489038/transparent-nanotubular-tio%C3%A2-photoanodes-grown-directly-on-fto-substrates
#10
Šárka Paušová, Štěpán Kment, Martin Zlámal, Michal Baudys, Zdeněk Hubička, Josef Krýsa
This work describes the preparation of transparent TiO₂ nanotube (TNT) arrays on fluorine-doped tin oxide (FTO) substrates. An optimized electrolyte composition (0.2 mol dm(-3) NH₄F and 4 mol dm(-3) H₂O in ethylene glycol) was used for the anodization of Ti films with different thicknesses (from 100 to 1300 nm) sputtered on the FTO glass substrates. For Ti thicknesses 600 nm and higher, anodization resulted in the formation of TNT arrays with an outer nanotube diameter around 180 nm and a wall thickness around 45 nm, while for anodized Ti thicknesses of 100 nm, the produced nanotubes were not well defined...
May 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28488846/impact-of-film-thickness-of-ultrathin-dip-coated-compact-tio2-layers-on-the-performance-of-mesoscopic-perovskite-solar-cells
#11
Muhammad Talha Masood, Christian Weinberger, Jawad Sarfraz, Emil Rosqvist, Simon Sandén, Oskar J Sandberg, Paola Vivo, Ghufran Hashmi, Peter D Lund, Ronald Österbacka, Jan-Henrik Smått
Uniform and pinhole-free electron-selective TiO2 layers are of utmost importance for efficient perovskite solar cells. Here we used a scalable and low-cost dip-coating method to prepare uniform and ultrathin (5-50 nm) compact TiO2 films on fluorine-doped tin oxide (FTO) glass substrates. The thickness of the film was tuned by changing the TiCl4 precursor concentration. The formed TiO2 follows the texture of the underlying FTO substrates, but at higher TiCl4 concentrations, the surface roughness is substantially decreased...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28482648/enhanced-photoelectrochemical-behavior-of-h-tio2-nanorods-hydrogenated-by-controlled-and-local-rapid-thermal-annealing
#12
Xiaodan Wang, Sonia Estradé, Yuanjing Lin, Feng Yu, Lluis Lopez-Conesa, Hao Zhou, Sanjeev Kumar Gurram, Francesca Peiró, Zhiyong Fan, Hao Shen, Lothar Schaefer, Guenter Braeuer, Andreas Waag
Recently, colored H-doped TiO2 (H-TiO2) has demonstrated enhanced photoelectrochemical (PEC) performance due to its unique crystalline core-disordered shell nanostructures and consequent enhanced conduction behaviors between the core-shell homo-interfaces. Although various hydrogenation approaches to obtain H-TiO2 have been developed, such as high temperature hydrogen furnace tube annealing, high pressure hydrogen annealing, hydrogen-plasma assisted reaction, aluminum reduction and electrochemical reduction etc...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28471641/ilmenite-nanotubes-for-high-stability-and-high-rate-sodium-ion-battery-anodes
#13
Litao Yu, Jun Liu, Xijun Xu, Liguo Zhang, Renzong Hu, Jiangwen Liu, Liuzhang Ouyang, Lichun Yang, Min Zhu
To solve the problem of large volume change and low electronic conductivity of earth-abundant ilmenite used in rechargeable Na-ion batteries (SIBs), an anode of tiny ilmenite FeTiO3 nanoparticle embedded carbon nanotubes (FTO⊂CNTs) has been successfully proposed. By introducing a TiO2 shell on metal-organic framework (Fe-MOF) nanorods by sol-gel deposition and subsequent solid-state annealing treatment of these core-shell Fe-MOF@TiO2, such well-defined FTO⊂CNTs are obtained. The achieved FTO⊂CNT electrode has several distinct advantages including a hollow interior in the hybrid nanostructure, fully encapsulated ultrasmall electroactive units, flexible conductive carbon matrix, and stable solid electrolyte interface (SEI) of FTO in cycles...
May 8, 2017: ACS Nano
https://www.readbyqxmd.com/read/28467347/cdte-nanocrystal-hetero-junction-solar-cells-with-high-open-circuit-voltage-based-on-sb-doped-tio%C3%A2-electron-acceptor-materials
#14
Miaozi Li, Xinyan Liu, Shiya Wen, Songwei Liu, Jingxuan Heng, Donghuan Qin, Lintao Hou, Hongbin Wu, Wei Xu, Wenbo Huang
We propose Sb-doped TiO₂ as electron acceptor material for depleted CdTe nanocrystal (NC) hetero-junction solar cells. Novel devices with the architecture of FTO/ZnO/Sb:TiO₂/CdTe/Au based on CdTe NC and TiO₂ precursor are fabricated by rational ambient solution process. By introducing TiO₂ with dopant concentration, we are able to tailor the optoelectronic properties of NC solar cells. Our novel devices demonstrate a very high open circuit voltage of 0.74 V, which is the highest Voc reported for any CdTe NC based solar cells...
May 3, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28464932/interaction-between-fto-rs9939609-and-the-native-american-origin-abca1-rs9282541-affects-bmi-in-the-admixed-mexican-population
#15
Marisela Villalobos-Comparán, Bárbara Antuna-Puente, María Teresa Villarreal-Molina, Samuel Canizales-Quinteros, Rafael Velázquez-Cruz, Paola León-Mimila, Hugo Villamil-Ramírez, Juan Antonio González-Barrios, José Luis Merino-García, María Rocío Thompson-Bonilla, Diego Jarquin, Osvaldo Erik Sánchez-Hernández, Martha Eunice Rodríguez-Arellano, Carlos Posadas-Romero, Gilberto Vargas-Alarcón, Francisco Campos-Pérez, Manuel Quiterio, Jorge Salmerón-Castro, Alessandra Carnevale, Sandra Romero-Hidalgo
BACKGROUND: The aim of this study was to explore whether interactions between FTO rs9939609 and ABCA1 rs9282541 affect BMI and waist circumference (WC), and could explain previously reported population differences in FTO-obesity and FTO-BMI associations in the Mexican and European populations. METHODS: A total of 3938 adults and 636 school-aged children from Central Mexico were genotyped for both polymorphisms. Subcutaneous and visceral adipose tissue biopsies from 22 class III obesity patients were analyzed for FTO and ABCA1 mRNA expression...
May 2, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28460778/macronutrients-and-the-fto-gene-expression-in-hypothalamus-a-systematic-review-of-experimental-studies
#16
REVIEW
Saeid Doaei, Naser Kalantari, Nastaran Keshavarz Mohammadi, Ghasem Azizi Tabesh, Maryam Gholamalizadeh
The various studies have examined the relationship between FTO gene expression and macronutrients levels. In order to obtain better viewpoint from this interactions, all of existing studies were reviewed systematically. All published papers have been obtained and reviewed using standard and sensitive keywords from databases such as CINAHL, Embase, PubMed, PsycInfo, and the Cochrane, from 1990 to 2016. The results indicated that all of 6 studies that met the inclusion criteria (from a total of 428 published article) found FTO gene expression changes at short-term follow-ups...
March 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28460220/study-on-dynamic-properties-of-the-photoexcited-charge-carriers-at-anatase-tio2-nanowires-fluorine-doped-tin-oxide-interface
#17
Qingqing Qiu, Lingling Xu, Dejun Wang, Yanhong Lin, Tengfeng Xie
The photoexcited electrons transfer dynamics at the TiO2 film/fluorine doped tin oxide (FTO) interface of anatase TiO2 nanowire arrays (NWAs) and QD-sensitized TiO2 NWAs films have been studied by using surface photovoltage (SPV) and transient photovoltage (TPV) techniques. Various SPV and TPV responses were obtained when the laser beam was incident from the front side illumination and back side illumination. Based on the work function values of anatase TiO2 NWAs and FTO, the results indicate that diffusion is the major way for the separation and transfer of the photoexcited charge in the both anatase TiO2 NWAs and QD-sensitized TiO2 NWAs films under front side illumination...
April 25, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28459029/association-of-fat-mass-and-obesity-associated-gene-variant-with-lifestyle-factors-and-body-fat-in-indian-children
#18
Lavanya S Parthasarthy, Nikhil Phadke, Shashi Chiplonkar, Anuradha Khadilkar, Kavita Khatod, Veena Ekbote, Surabhi Shah, Vaman Khadilkar
CONTEXT: Common intronic variants of the fat mass and obesity-associated (FTO) gene have been associated with obesity-related traits in humans. AIMS: (1) The aim of this study is to study the distribution of FTO gene variants across different body mass index (BMI) categories and (2) to explore the association between FTO gene variants and lifestyle factors in obese and normal weight Indian children. SUBJECTS AND METHODS: Fifty-six children (26 boys, mean age 10...
March 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28453518/lc-ms-ms-quantitative-analysis-reveals-the-association-between-fto-and-dna-methylation
#19
Yuting Zhu, Guangyu Zhou, Xuebin Yu, Qiang Xu, Kai Wang, Dan Xie, Qingkai Yang, Lina Wang
Fat mass and obesity-associated protein (FTO) is α-ketoglutarate-dependent dioxygenase and responsible for demethylating N6-methyladenosine (m6A) in mRNA, 3-methylthymine (m3T) in single-stranded DNA (ssDNA) and 3-methyluracil (m3U) in single-stranded RNA (ssRNA). Its other function remains unknown but thousands of mammalian DNA show 5-methyl-2'-deoxycytidine (5mdC) modification and 5mdC demethylases are required for mammalian energy homeostasis and fertility. Here, we aimed to confirm whether FTO proteins can demethylate 5mdC in DNA...
2017: PloS One
https://www.readbyqxmd.com/read/28451524/fat-mass-and-obesity-associated-gene-polymorphism-and-the-risk-of-polycystic-ovary-syndrome-a-meta-analysis
#20
REVIEW
Ying Liu, Yongxia Chen
BACKGROUND: We aimed to elucidate the association between fat mass and obesity associated gene (FTO) polymorphism and the risk of polycystic ovary syndrome (PCOS) by meta-analysis. METHODS: We searched PubMed and Embase databases to find the relevant studies. Odds ratios (ORs) and their corresponding 95% confidence intervals (CIs) were used for pooled analysis. Statistical analyses were carried out by using R 3.12 software. Heterogeneity was assessed using I (2) and Q statistics...
January 2017: Iranian Journal of Public Health
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