Results 61 to 70 of about 77,925 (341)

DNA‐Templated 2D Heterostructures as Phototriggered Dynamic Nanohybrids: From Releasing Molecular Loads to Controlling Enzyme Biocatalytic Function

open access: yesAdvanced Functional Materials, EarlyView.
DNA strands are employed both as dynamic linkers and nanoscale templates for the integration of Ag2S nanoparticles on MoS2, which in turn imparted photothermal responsiveness; this feature permits the selective cargo (fluorophore, quantum dots or an enzyme) release from the MoS2 surface in response to local heat induced by light irradiation.
Kai Chen   +3 more
wiley   +1 more source

Role of tangential force coefficient on fretting fatigue life estimation of a single crystal Ni-base superalloy

open access: yesMechanical Engineering Journal, 2017
Fretting fatigue behavior of Ni-base superalloys used in gas turbine blades and disk assemblies have been investigated under ambient and high temperature conditions. A major emphasis was placed on the influence of experimentally measured tangential force
Balavenkatesh RENGARAJ   +2 more
doaj   +1 more source

Finite element analysis of fretting crack propagation

open access: yes, 2011
In this work, the finite elements method (FEM) is used to analyse the growth of fretting cracks. FEM can be favourably used to extract the stress intensity factors in mixed mode, a typical situation for cracks growing in the vicinity of a fretting ...
Basseville, Stéphanie, Proudhon, Henry
core   +4 more sources

Fretting wear of TiN PVD coating under variable relative humidity conditions – development of a “composite” wear law [PDF]

open access: yes, 2008
Fretting is defined as a small oscillatory displacement between two contacting bodies. The interface is damaged by debris generation and its ejection from the contact area.
Fouvry, S.   +3 more
core   +1 more source

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

open access: yesAdvanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source

Experimental and numerical investigation into effect of elevated temperature on fretting fatigue behavior [PDF]

open access: yes, 2011
Fretting fatigue damage occurs in contacting parts when they are subjected to fluctuating loadings and sliding movements at the same time. This phenomenon may occur in many applications such as bearings/ shafts, bolted and riveted connections, steel ...
Abdel Wahab, Magd   +3 more
core  

Fretting about FRET: Failure of the Ideal Dipole Approximation [PDF]

open access: yesBiophysical Journal, 2009
With recent growth in the use of fluorescence-detected resonance energy transfer (FRET), it is being applied to complex systems in modern and diverse ways where it is not always clear that the common approximations required for analysis are applicable.
A. MUNOZ LOSA   +4 more
openaire   +3 more sources

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

open access: yesAdvanced Functional Materials, EarlyView.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King   +3 more
wiley   +1 more source

Design-Informed Evaluation and Fretting Damage Mapping of Additive-Manufactured Ti-6Al-4V Components

open access: yesDesigns
This paper experimentally investigates the fretting fatigue behavior of metal additive-manufactured Ti-6Al-4V alloy specimens fabricated using the selective laser melting (SLM) method, focusing on damage characterization and fatigue life assessment ...
Ahmad Sadeghian, Saeed Adibnazari
doaj   +1 more source

Fretting about FRET: Correlation between κ and R [PDF]

open access: yesBiophysical Journal, 2007
Molecular dynamics simulations were used to examine the structural dynamics of two fluorescent probes attached to a typical protein, hen egg-white lysozyme (HEWL). The donor probe (D) was attached via a succinimide group, consistent with the commonly-used maleimide conjugation chemistry, and the acceptor probe (A) was bound into the protein as occurs ...
VanBeek, Darren B.   +3 more
openaire   +2 more sources

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