Figure 1:Quantum yield and radiative and non-radiative decay processes. The quantum yield of a system (such as a fluorescent molecule) is determined by the balance between the radiative and non-radiative transition rates within it (Figure 1). The quantum yield can therefore be rewritten in term...
Förster resonance energy transfer (FRET) describes the non-radiative transfer of energy from an excited fluorophore (the donor) to a non-excited different fluorescent molecule (the acceptor) in its vicinity. For aFRETexperiment, potentially binding macromolecules, like proteins and nucleic acids, ar...
Which energy levels electrons move between governs the type of transition that occurs. Fluorescence is one of the processes of photon emission from a chemical compound. These transitions can be radiative or non radiative. Radiative transitions result in the emission of a photon, which is called lum...
because temperature is an indication of the energy intensity/density of a substance, energy per unit mass. In an ideal gas or vacuum the majority of the energy flow is a radiative flux, pure energy propagating to another place, which is always unattenuated in a vacuum, also in some atmosphe...
Auger recombination isa non-radiative process involving three carriers. Direct Auger recombination occurs when an electron and hole recombine, but instead of producing light, either an electron is raised higher into the conduction band or a hole is pushed deeper into the valence band, as shown in...
A series of covalently linked, transition-metal donor/acceptor complexes are described in which the net donor−acceptor coupling matrix element, HDA, is independent of the extent of coupling between the donor and the bridging ligand. The bridging ligand in these complexes is a transition-metal di...
N.T.M. · :– https://doi.org/./s--- Published online October © Springer Nature Switzerland AG 'A Pretence of What is ...
The PA method, involving the irradiation of selected vessels using short laser pulses followed by the detection of laser-induced acoustic waves (PA signals) with an ultrasound transducer, is non-radiative imaging that takes advantage of the high sensitivity of laser technology and high spatial ...
The nature of the possible radiative processes at work is also not firmly established yet. Particles inside the outflow and accelerated towards relativistic regime can emit the observed high-energy photons via many possible non-thermal mechanisms, in particular during the early afterglow phase. In ...
Kr and ∑knr are the radiative transition rate constant and the sum of non-radiative transition rate constants, respectively, that describe the depopulation of the molecule’s excited state. For the molecule described in Figure 1, the fluorescence lifetime (τ) is mathematically defined as:1 On...