scholarly journals Ion responsive near-IR BODIPY dyes: two isomers, two different signals

RSC Advances ◽  
2014 ◽  
Vol 4 (29) ◽  
pp. 14915-14918 ◽  
Author(s):  
Tugba Ozdemir ◽  
Ziya Kostereli ◽  
Ruslan Guliyev ◽  
Soydan Yalcin ◽  
Yavuz Dede ◽  
...  
Keyword(s):  
Metal Ions ◽  
Near Ir ◽  
Ir Sensors

Different responses of two isomeric tetrastyryl-BODIPY's were studied, shedding light on the path to near IR sensors for metal ions.

scholarly journals Near-IR-Triggered, Remote-Controlled Release of Metal Ions: A Novel Strategy for Caged Ions

2014 ◽  
Vol 53 (40) ◽  
pp. 10678-10681 ◽  
Author(s):  
Ahmet Atilgan ◽  
Esra Tanriverdi Eçik ◽  
Ruslan Guliyev ◽  
T. Bilal Uyar ◽  
Sundus Erbas-Cakmak ◽  
...  
Keyword(s):  
Controlled Release ◽  
Metal Ions ◽  
Near Ir ◽  
Novel Strategy

scholarly journals PREDICTING THE INFRARED UAV IMAGERY OVER THE COAST

2021 ◽  
Vol XLIII-B1-2021 ◽  
pp. 149-156
Author(s):  
A. Collin ◽  
D. James ◽  
A. Mury ◽  
M. Letard ◽  
B. Guillot
Keyword(s):  
Spatially Explicit ◽  
Spatially Explicit Model ◽  
Additional Information ◽  
Near Ir ◽  
Ir Sensors ◽  
Boosted Tree ◽  
Habitat Scale ◽  
Earth Observation Satellites ◽  
Fully Connected ◽  
Visible Imagery

Abstract. The infrared (IR) imagery provides additional information to the visible (red-green-blue, RGB) about vegetation, soil, water, mineral, or temperature, and has become essential for various disciplines, such as geology, hydrology, ecology, archeology, meteorology or geography. The integration of the IR sensors, ranging from near-IR (NIR) to thermal-IR through mid-IR, constitutes a baseline for Earth Observation satellites but not for unmanned airborne vehicles (UAV). Given the hyperspatial and hypertemporal characteristics associated with the UAV survey, it is relevant to benefit from the IR waveband in addition to the visible imagery for mapping purposes. This paper proposes to predict the NIR reflectance from RGB digital number predictors collected with a consumer-grade UAV over a structurally and compositionally complex coastal area. An array of 15 000 data, distributed into calibration, validation and test datasets across 15 representative coastal habitats, was used to build and compare the performance of the standard least squares, decision tree, boosted tree, bootstrap forest and fully connected neural network (NN) models. The NN family surpassed the four other ones, and the best NN model (R2 = 0.67) integrated two hidden layers provided, each, with five nodes of hyperbolic tangent and five nodes of Gaussian activation functions. This perceptron enabled to produce a NIR reflectance spatially-explicit model deprived of original artifacts due to the flight constraints. At the habitat scale, sedimentary and dry vegetation environments were satisfactorily predicted (R2 > 0.6), contrary to the healthy vegetation (R2 < 0.2). Those innovative findings will be useful for scientists and managers tasked with hyperspatial and hypertemporal mapping.

Modulating the selectivity of near-IR fluorescent probes toward various metal ions by judicious choice of aqueous buffer solutions

2011 ◽  
Vol 47 (13) ◽  
pp. 3915 ◽  
Author(s):  
Tanyu Cheng ◽  
Tao Wang ◽  
Weiping Zhu ◽  
Yangyang Yang ◽  
Bubing Zeng ◽  
...  
Keyword(s):  
Metal Ions ◽  
Fluorescent Probes ◽  
Aqueous Buffer ◽  
Buffer Solutions ◽  
Near Ir ◽  
Judicious Choice

Near-IR-Triggered, Remote-Controlled Release of Metal Ions: A Novel Strategy for Caged Ions

2014 ◽  
Vol 126 (40) ◽  
pp. 10854-10857 ◽  
Author(s):  
Ahmet Atilgan ◽  
Esra Tanriverdi Eçik ◽  
Ruslan Guliyev ◽  
T. Bilal Uyar ◽  
Sundus Erbas-Cakmak ◽  
...  
Keyword(s):  
Controlled Release ◽  
Metal Ions ◽  
Near Ir ◽  
Novel Strategy

Surface Brightness Scale of Galactic Cepheids

1999 ◽  
Vol 190 ◽  
pp. 561-562
Author(s):  
G. P. Di Benedetto
Keyword(s):  
Surface Brightness ◽  
Variable Stars ◽  
Giant Stars ◽  
Near Ir

An accurate calibration of the surface brightness scaleSVas a function of the near-IR color (V–K) has been recently measured for non-variable Galactic dwarf and giant stars. It can be shown that this correlation can be applied to theSVscale of Galactic Cepheid variable stars, which are of major cosmological interest.

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

ELNES of Iron Compounds

1990 ◽  
Vol 48 (2) ◽  
pp. 28-29
Author(s):  
Hiroki Kurata ◽  
Kazuhiro Nagai ◽  
Seiji Isoda ◽  
Takashi Kobayashi
Keyword(s):  
Energy Loss ◽  
Metal Ions ◽  
Energy Resolution ◽  
Transition Metal Oxides ◽  
Local Symmetry ◽  
Iron Compounds ◽  
Fine Structures ◽  
Electron Energy Loss ◽  
Fe Ions ◽  
Electron Energy Loss Spectra

Electron energy loss spectra of transition metal oxides, which show various fine structures in inner shell edges, have been extensively studied. These structures and their positions are related to the oxidation state of metal ions. In this sence an influence of anions coordinated with the metal ions is very interesting. In the present work, we have investigated the energy loss near-edge structures (ELNES) of some iron compounds, i.e. oxides, chlorides, fluorides and potassium cyanides. In these compounds, Fe ions (Fe2+ or Fe3+) are octahedrally surrounded by six ligand anions and this means that the local symmetry around each iron is almost isotropic.EELS spectra were obtained using a JEM-2000FX with a Gatan Model-666 PEELS. The energy resolution was about leV which was mainly due to the energy spread of LaB6 -filament. The threshole energies of each edges were measured using a voltage scan module which was calibrated by setting the Ni L3 peak in NiO to an energy value of 853 eV.

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