scholarly journals Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent emission in organic materials

2001 ◽  
Vol 79 (13) ◽  
pp. 2082-2084 ◽  
Author(s):  
Chihaya Adachi ◽  
Raymond C. Kwong ◽  
Peter Djurovich ◽  
Vadim Adamovich ◽  
Marc A. Baldo ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Organic Materials ◽  
High Energy

scholarly journals Nanoscale optical writing through upconversion resonance energy transfer

2021 ◽  
Vol 7 (9) ◽  
pp. eabe2209
Author(s):  
S. Lamon ◽  
Y. Wu ◽  
Q. Zhang ◽  
X. Liu ◽  
M. Gu
Keyword(s):  
Graphene Oxide ◽  
Energy Transfer ◽  
Energy Consumption ◽  
Data Storage ◽  
High Capacity ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
High Energy ◽  
Optical Data ◽  
Upconversion Nanoparticles

Nanoscale optical writing using far-field super-resolution methods provides an unprecedented approach for high-capacity data storage. However, current nanoscale optical writing methods typically rely on photoinitiation and photoinhibition with high beam intensity, high energy consumption, and short device life span. We demonstrate a simple and broadly applicable method based on resonance energy transfer from lanthanide-doped upconversion nanoparticles to graphene oxide for nanoscale optical writing. The transfer of high-energy quanta from upconversion nanoparticles induces a localized chemical reduction in graphene oxide flakes for optical writing, with a lateral feature size of ~50 nm (1/20th of the wavelength) under an inhibition intensity of 11.25 MW cm−2. Upconversion resonance energy transfer may enable next-generation optical data storage with high capacity and low energy consumption, while offering a powerful tool for energy-efficient nanofabrication of flexible electronic devices.

A New Heptanuclear Dendritic Ruthenium(II) Complex Featuring Photoinduced Energy Transfer Across High-Energy Subunits

ChemPhysChem ◽  
2005 ◽  
Vol 6 (1) ◽  
pp. 129-138 ◽  
Author(s):  
Fausto Puntoriero ◽  
Scolastica Serroni ◽  
Maurilio Galletta ◽  
Alberto Juris ◽  
Antonino Licciardello ◽  
...  
Keyword(s):  
Energy Transfer ◽  
High Energy

Damage in High Energy Light Ions Irradiated Silicon Carbide

1998 ◽  
Vol 510 ◽  
Author(s):  
P. Leveque ◽  
S. Godey ◽  
P.O. Renault ◽  
E. Ntsoenzok ◽  
J.F. Barbot
Keyword(s):  
Silicon Carbide ◽  
Surface Layer ◽  
Energy Transfer ◽  
High Energy ◽  
Alpha Particles ◽  
Defect Production ◽  
Majority Carrier ◽  
Reflectivity Spectra ◽  
Light Ions ◽  
Compensation Layer

AbstractCommercial n-type 4H-SiC wafers were implanted with doses of MeV alpha particles, high enough to cause majority carrier modification. Analysis of infrared reflectivity spectra shows that the implanted crystals can be divided into three layers: a surface layer of about 30 nm followed by a compensation layer where the energy transfer of the incident particles is low and an overdoping layer in the region of maximum defect production, i.e. near the theoretical mean range of ions Rp

scholarly journals Visible Light-Enabled Paternò-Büchi Reaction via Triplet Energy Transfer for the Synthesis of Oxetanes

2020 ◽  
Author(s):  
Katie Rykaczewski ◽  
Corinna Schindler
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Uv Light ◽  
Cycloaddition Reaction ◽  
High Energy ◽  
Triplet Energy ◽  
Reaction Conditions ◽  
Triplet Energy Transfer

<div> <p>One of the most efficient ways to synthesize oxetanes is the light-enabled [2+2] cycloaddition reaction of carbonyls and alkenes, referred to as the Paternò-Büchi reaction. The reaction conditions for this transformation typically require the use of high energy UV light to excite the carbonyl, limiting the applications, safety, and scalability. We herein report the development of a visible light-mediated Paternò-Büchi reaction protocol that relies on triplet energy transfer from an iridium-based photocatalyst to the carbonyl substrates. This mode of activation is demonstrated for a variety of aryl glyoxylates and negates the need for both, visible light-absorbing carbonyl starting materials or UV light to enable access to a variety of functionalized oxetanes in up to 99% yield.</p> </div> <br>

scholarly journals Intracellular Energy-Transfer Networks and High-Resolution Respirometry: A Convenient Approach for Studying Their Function

2018 ◽  
Vol 19 (10) ◽  
pp. 2933 ◽  
Author(s):  
Marju Puurand ◽  
Kersti Tepp ◽  
Aleksandr Klepinin ◽  
Lyudmila Klepinina ◽  
Igor Shevchuk ◽  
...  
Keyword(s):  
Energy Transfer ◽  
High Resolution ◽  
Energy Use ◽  
Adenosine Monophosphate ◽  
High Energy ◽  
Functional Coupling ◽  
Convenient Approach ◽  
Intracellular Energy Transfer ◽  
Intracellular Energy ◽  
Effect Of Glucose

Compartmentalization of high-energy phosphate carriers between intracellular micro-compartments is a phenomenon that ensures efficient energy use. To connect these sites, creatine kinase (CK) and adenylate kinase (AK) energy-transfer networks, which are functionally coupled to oxidative phosphorylation (OXPHOS), could serve as important regulators of cellular energy fluxes. Here, we introduce how selective permeabilization of cellular outer membrane and high-resolution respirometry can be used to study functional coupling between CK or AK pathways and OXPHOS in different cells and tissues. Using the protocols presented here the ability of creatine or adenosine monophosphate to stimulate OXPHOS through CK and AK reactions, respectively, is easily observable and quantifiable. Additionally, functional coupling between hexokinase and mitochondria can be investigated by monitoring the effect of glucose on respiration. Taken together, high-resolution respirometry in combination with permeabilization is a convenient approach for investigating energy-transfer networks in small quantities of cells and tissues in health and in pathology.

Über die Abhängigkeit der relativen biologischen Wirksamkeit hochenergetischer Bremsstrahlen von der durchstrahlten Materieschicht / Dependence of the Relative Biological Efficiency of High Energy Bremssstrahlen on the Depth in a Phantom

1969 ◽  
Vol 24 (12) ◽  
pp. 1633-1640 ◽  
Author(s):  
F. Stähler ◽  
F. Zywietz ◽  
W. Ewert ◽  
H. A. Künkel
Keyword(s):  
Energy Transfer ◽  
Vicia Faba ◽  
Linear Energy Transfer ◽  
Experimental Error ◽  
Nuclear Reactions ◽  
High Energy ◽  
Biological Efficiency ◽  
Heavy Particles ◽  
Order Of Magnitude

The Relative Biological Efficiency (RBE) of 6-GeV-bremsstrahlung on 3-days-old seedlings of Vicia faba was investigated with the Deutsches ElektronenSynchrotron. Dosimetry was carried out by means of the butanol-sensitized FeII/FeIII-reaction. In a Lucite-phantom we observed an increase of the RBE from 0,65 at the surface to values of about 2 at a depth of 40 cm. As changes of that order of magnitude are doubtless beyond the limits of the maximum experimental error we suppose that production of heavy particles by nuclear reactions such as (γ, n) or (γ, p) in deeper layers of matter might cause an increase of the linear energy transfer of the beam.

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