keyword
MENU ▼
Read by QxMD icon Read
search

Energy harvester

keyword
https://www.readbyqxmd.com/read/28091637/investigation-of-a-new-bis-carboxylate-triazole-based-anchoring-ligand-for-dye-solar-cell-chromophore-complexes
#1
Alessandro Sinopoli, Fiona A Black, Christopher J Wood, Elizabeth A Gibson, Paul I P Elliott
A novel anchoring ligand for dye-sensitised solar cell chromophoric complexes, 1-(2,2'-bipyrid-4-yl)-1,2,3-triazole-4,5-dicarboxylic acid (dctzbpy), is described. The new dye complexes [Ru(bpy)2(dctzbpy)][PF6]2 (AS16), [Ir(ppy)2(dctzbpy)][PF6] (AS17) and [Re(dctzbpy)(CO)3Cl] (AS18) were prepared in a two stage procedure with intermediate isolation of their diester analogues, AS16-Et2, AS17-Et2 and AS18-Et2 respectively. Electrochemical analysis of AS16-Et2, AS17-Et2 and AS18-Et2 reveal reduction potentials in the range -1...
January 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28088847/vapor-and-gas-bubble-growth-dynamics-around-laser-irradiated-water-immersed-plasmonic-nanoparticles
#2
Yuliang Wang, Mikhail E Zaytsev, Hai Le The, Jan Cornelis Titus Eijkel, Harold J W Zandvliet, Xuehua Zhang, Detlef Lohse
Microbubbles produced by exposing water-immersed metallic nanoparticles to resonant light play an important role in novel and efficient plasmonic-enhanced processes for catalytic conversion, solar energy harvesting, biomedical imaging technique or cancer therapy. How do these bubbles form and what is their gas composition? In this article, the growth dynamics of nucleating bubbles around laser irradiated water-immersed Au plasmonic nanoparticles are studied to determine the exact origin of the occurrence and growth of these bubbles...
January 16, 2017: ACS Nano
https://www.readbyqxmd.com/read/28088091/solar-to-chemical-and-solar-to-fuel-production-from-co2-by-metabolically-engineered-microorganisms
#3
REVIEW
Han Min Woo
Recent development of carbon capture utilization (CCU) for reduction of greenhouse gas emission are reviewed. In the case of CO2 utilization, I describe development of solar-to-chemical and solar-to-fuel technology that refers to the use of solar energy to convert CO2 to desired chemicals and fuels. Photoautotrophic cyanobacterial platforms have been extensively developed on this principle, producing a diverse range of alcohols, organic acids, and isoprenoids directly from CO2. Recent breakthroughs in the metabolic engineering of cyanobacteria were reviewed...
January 11, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28079979/a-general-strategy-to-enhance-the-performance-of-dye-sensitized-solar-cells-by-incorporating-light-harvesting-dye-with-hydrophobic-polydiacetylene-electrolyte-blocking-layer
#4
Shih-Sheng Sun, Mekonnen Abebayehu Desta, Chia-Wei Liao
A unique strategy for effectively suppressing charge recombination and enhancing light harvesting in dye-sensitized solar cells (DSSCs) is demonstrated by designing a new dipolar organic dye functionalized with a diacetylene unit, which is capable of undergoing photoinduced cross-linking reaction to generate a hydrophobic polydiacetylene layer. The polydiacetylene layer serves as not only an electrolyte-blocking layer to effectively block the approaching of the oxidized redox mediator and supress the dark current but also light-harvesting role by efficient energy transfer to the dipolar dyes...
January 12, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28079971/au-la2-ti2-o7-nanostructures-sensitized-with-black-phosphorous-for-plasmon-enhanced-photocatalytic-hydrogen-production-in-visible-and-near-infrared-light
#5
Mingshan Zhu, Xiaoyan Cai, Mamoru Fujitsuka, Junying Zhang, Tetsuro Majima
Efficient utilization of solar energy is a high-priority target and the search for suitable materials as photocatalysts that not only can harvest the broad wavelength of solar light, from UV to near-infrared (NIR) region, but also can achieve high and efficient solar-to-hydrogen conversion is one of the most challenging missions. Herein, using Au/La2 Ti2 O7 (BP-Au/LTO) sensitized with black phosphorus (BP), a broadband solar response photocatalyst was designed and used as efficient photocatalyst for H2 production...
January 12, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28078551/the-proteolysis-adaptor-nbla-binds-to-the-n-terminus-of-%C3%AE-phycocyanin-implications-for-the-mechanism-of-phycobilisome-degradation
#6
Amelia Y Nguyen, William P Bricker, Hao Zhang, Daniel A Weisz, Michael L Gross, Himadri B Pakrasi
Phycobilisome (PBS) complexes are massive light-harvesting apparati in cyanobacteria that capture and funnel light energy to the photosystem. PBS complexes are dynamically degraded during nutrient deprivation, which causes severe chlorosis, and resynthesized during nutrient repletion. PBS degradation occurs rapidly after nutrient step down, and is specifically triggered by non-bleaching protein A (NblA), a small proteolysis adaptor that facilitates interactions between a Clp chaperone and phycobiliproteins...
January 11, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28077273/reevaluating-the-mechanism-of-excitation-energy-regulation-in-iron-starved-cyanobacteria
#7
Hui-Yuan S Chen, Michelle Liberton, Himadri B Pakrasi, Dariusz M Niedzwiedzki
This paper presents spectroscopic investigation of IsiA, a chlorophyll a-binding membrane protein produced by cyanobacteria grown in iron-deficient environments. IsiA, if associated with photosystem I, supports photosystem I in light harvesting by efficiently transferring excitation energy. However, if separated from photosystem I, IsiA exhibits considerable excitation quenching observed as a substantial reduction of protein-bound chlorophyll a fluorescence lifetime. Previous spectroscopic studies suggested that carotenoids are involved in excitation energy dissipation and in addition play a second role in this antenna complex by supporting chlorophyll a in light harvesting by absorbing in the spectral range inaccessible for chlorophyll a and transferring excitation to chlorophylls...
January 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28075372/distributed-sensor-nodes-charged-by-mobile-charger-with-directional-antenna-and-by-energy-trading-for-balancing
#8
Celso Moraes, Sunghee Myung, Sangkeum Lee, Dongsoo Har
Provision of energy to wireless sensor networks is crucial for their sustainable operation. Sensor nodes are typically equipped with batteries as their operating energy sources. However, when the sensor nodes are sited in almost inaccessible locations, replacing their batteries incurs high maintenance cost. Under such conditions, wireless charging of sensor nodes by a mobile charger with an antenna can be an efficient solution. When charging distributed sensor nodes, a directional antenna, rather than an omnidirectional antenna, is more energy-efficient because of smaller proportion of off-target radiation...
January 10, 2017: Sensors
https://www.readbyqxmd.com/read/28074958/distant-ultrafast-energy-transfer-in-a-trimetallic-ru-ru-cr-complex-facilitated-by-hole-delocalization
#9
Alejandro Cadranel, Jaired E Tate, Paola S Oviedo, Shiori Yamazaki, José H Hodak, Luis M Baraldo, Valeria D Kleiman
Multi-metallic complexes based on {Ru-Cr}, {Ru-Ru} and {Ru-Ru-Cr} fragments are investigated for their light-harvesting and long-range energy transfer properties. We report the synthesis and characterization of [Ru(tpy)(bpy)(μ-CN)Ru(py)4Cl](2+) and [Ru(tpy)(bpy)(μ-CN)Ru(py)4(μ-NC)Cr(CN)5]. The intercalation of {Ru(II)(py)4} linked by cyanide bridges between {Ru(tpy)(bpy)} and {Cr(CN)5} results in efficient, distant energy transfer followed by emission from the Cr moiety. Characterization of the energy transfer process based on photophysical and ultrafast time-resolved absorption suggests the delocalization of holes in the excited state, providing a pathway for energy transfer between the end moieties...
January 11, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28074537/neuroblastoma-causes-alterations-of-the-intestinal-microbiome-gut-hormones-inflammatory-cytokines-and-bile-acid-composition
#10
Christoph Castellani, Georg Singer, Margarita Kaiser, Thomas Kaiser, Jianfeng Huang, Daniela Sperl, Karl Kashofer, Guenter Fauler, Barbara Guertl-Lackner, Gerald Höfler, Holger Till
OBJECTIVE: To assess the effect of neuroblastoma (NB) on the intestinal microbiome, metabolism, and inflammatory parameters in a murine model. MATERIALS AND METHODS: Athymic Hsd:Fox1nu mice received subperitoneal implantation of human NB cells (MHH-NB11) (tumor group, TG) or culture medium (sham group). Following 10 weeks of tumor growth, all animals were sacrificed to collect total white adipose tissue (WAT). Luminex assays were performed for gut hormone and inflammation marker analysis...
January 11, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28074199/topological-phase-transformations-and-intrinsic-size-effects-in-ferroelectric-nanoparticles
#11
John Mangeri, Yomery Espinal, Andrea Jokisaari, S Pamir Alpay, Serge Nakhmanson, Olle Heinonen
Composite materials comprised of ferroelectric nanoparticles in a dielectric matrix are being actively investigated for a variety of functional properties attractive for a wide range of novel electronic and energy harvesting devices. However, the dependence of these functionalities on shapes, sizes, orientation and mutual arrangement of ferroelectric particles is currently not fully understood. In this study, we utilize a time-dependent Ginzburg-Landau approach combined with coupled-physics finite-element-method based simulations to elucidate the behavior of polarization in isolated spherical PbTiO3 or BaTiO3 nanoparticles embedded in a dielectric medium, including air...
January 11, 2017: Nanoscale
https://www.readbyqxmd.com/read/28072519/single-molecule-fluorescence-spectroscopy-of-photosynthetic-systems
#12
Toru Kondo, Wei Jia Chen, Gabriela S Schlau-Cohen
Photosynthesis begins when a network of pigment-protein complexes captures solar energy and transports it to the reaction center, where charge separation occurs. When necessary (under low light conditions), photosynthetic organisms perform this energy transport and charge separation with near unity quantum efficiency. Remarkably, this high efficiency is maintained under physiological conditions, which include thermal fluctuations of the pigment-protein complexes and changing local environments. These conditions introduce multiple types of heterogeneity in the pigment-protein complexes, including structural heterogeneity, energetic heterogeneity, and functional heterogeneity...
January 10, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28070927/lead-sulfide-selenide-quantum-dots-and-gold-copper-alloy-nanoparticles-augment-light-harvesting-of-solar-cells
#13
Aparajita Das, Melepurath Deepa, Partha Ghosal
Lead-sulfide-selenide (PbSSe) quantum dots (QDs) and gold-copper (AuCu) alloy nanoparticles (NPs) are incorporated in a cadmium sulfide (CdS)/titanium oxide (TiO2) photoanode for the first time for enhanced conversion of solar energy to electricity. PbSSe QDs with a band gap of 1.02 eV, extend the light harvesting range of the photoanode from visible to the near infrared region. The conduction band (CB) edge of PbSSe QDs is wedged between the CBs of TiO2 and CdS; this additional level coupled with a good electrical conductivity of the dots facilitate charge transport and collection, for a high power conversion efficiency (PCE) of 4...
January 10, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28068143/adaptations-to-excess-choline-in-insulin-resistant-and-pcyt2-deficient-skeletal-muscle
#14
Adrian Taylor, Laila Cigana Schenkel, Maiya Yokich, Marica Bakovic
It was hypothesized that choline supplementation in insulin resistant (IR) CTP:phosphoethanolamine cytidylyltransferase deficient (Pcyt2(+/-)) mice would ameliorate muscle function by remodeling glucose and fatty acid (FA) metabolism. Pcyt2(+/-) mice either received no treatment or were allowed access to 2 mg/mL choline in drinking water for 4 weeks. Skeletal muscle was harvested from choline treated and untreated mice. Lipid analysis and metabolic gene expression and signaling pathways were compared between untreated Pcyt2(+/-) mice, treated Pcyt2(+/-) mice, and Pcyt2(+/+) mice...
September 6, 2016: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28067521/nanoscale-dynamics-versus-surface-interactions-what-dictates-osmotic-transport
#15
C Lee, C Cottin-Bizonne, R Fulcrand, L Joly, C Ybert
The classical paradigm for osmotic transport has long related the induced-flow direction to the solute membrane interactions, with the low-to-high concentration flow a direct consequence of the solute rejection from the semipermeable membrane. In principle, the same was thought to occur for the newly demonstrated membrane-free osmotic transport named diffusio-osmosis. Using a recently proposed nanofluidic setup, we revisit this cornerstone of osmotic transport by studying the diffusio-osmotic flows generated at silica surfaces by either poly(ethylene)glycol polymers or ethanol molecules in aqueous solutions...
January 9, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28067442/boosting-visible-light-driven-photocatalytic-hydrogen-evolution-with-an-integrated-nickel-phosphide-carbon-nitride-system
#16
Arindam Indra, Amitava Acharjya, Prashanth W Menezes, Christoph Merschjann, Dirk Hollmann, Michael Schwarze, Mesut Aktas, Aleksej Friedrich, Stefan Lochbrunner, Arne Thomas, Matthias Driess
Solar light harvesting by photocatalytic H2 evolution from water could solve the problem of greenhouse gas emission from fossil fuels with alternative clean energy. However, the development of more efficient and robust catalytic systems remains a great challenge for the technological use on a large scale. Here we report the synthesis of a sol-gel prepared mesoporous graphitic carbon nitride (sg-CN) combined with nickel phosphide (Ni2 P) which acts as a superior co-catalyst for efficient photocatalytic H2 evolution by visible light...
January 9, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28067404/electrochemical-techniques-reveal-that-total-ammonium-stress-increases-electron-flow-to-anode-respiration-in-mixed-species-bacterial-anode-biofilms
#17
Mohamed Mahmoud, Prathap Parameswaran, César I Torres, Bruce E Rittmann
When anode-respiring bacteria (ARB) respire electrons to an anode in microbial electrochemical cells (MXCs), they harvest only a small amount of free energy. This means that ARB must have a high substrate-oxidation rate coupled with a high ratio of electrons used for respiration compared to total electrons removed by substrate utilization. It also means that they are especially susceptible to inhibition that slows anode respiration or lowers their biomass yield. Using several electrochemical techniques, we show that a relatively high total ammonium-nitrogen (TAN) concentration (2...
January 9, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28067372/selective-turn-on-and-modulation-of-resonant-energy-transfer-in-single-plasmonic-hybrid-nanostructures
#18
Łukasz Bujak, Tatsuya Ishii, Dharmendar Kumar Sharma, Shuzo Hirata, Martin Vacha
Förster resonant energy transfer (FRET) is a nonradiative process by which the energy of light absorbed by a donor molecule is transferred to an acceptor molecule over a distance of several nanometers. FRET plays a crucial role in photosynthesis and nature-inspired artificial light-harvesting systems that are being explored for use in energy conversion applications. Localized plasmons of metal nanoparticles can potentially lead to a significant increase of FRET efficiency and effective donor-acceptor distance...
January 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28066946/self-assembly-of-tunable-heterometallic-ln-ru-coordination-polymer-with-near-infrared-luminescence-and-magnetocaloric-effect
#19
Lei Wang, Zhigang Xie
A series of heterometallic Ln-Ru coordination polymers, named Gd-1, Yb-2 and Nd-3, have been prepared under the solvothermal reaction of the carboxylate derivate of Rubpy, oxalate acid (ox) as assisted ligand and Ln(OAc)3 by using the "metalloligands strategy". The X-ray single crystal diffraction analyses indicate that those isostructural heterometallic complexes have a 1-D butterfly-shaped Ln-Ru-based coordination chains but make slightly difference in the coordination environments of Ln centers. The introduced Rubpy metalloligands could act as a well light-harvesting antenna to effectively sensitize the near-infrared (NIR) luminescence by energy transfer from the triplet metal-to ligand charge transfer (3MLCT) state of Rubpy units to the Ln (Yb or Nd) under the excitation at visible light region...
January 9, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28063645/anisotropy-and-inter-condyle-heterogeneity-of-cartilage-under-large-strain-shear
#20
Stephany Santos, Franz Maier, David M Pierce
We were the first to examine the mechanical responses of skeletally mature bovine femoral cartilage under large-strain simple shear (up to ±20%) using a multiaxial shear testing device. Since shear loading is critical in both tissue failure and chondrocyte responses, we aimed to probe (1) anisotropy with respect to the split-line direction (principal alignment of the collagen fibers near the articulating surface), (2) heterogeneity between femoral condyles, and (3) the influence of local cartilage thickness...
December 30, 2016: Journal of Biomechanics
keyword
keyword
79602
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"