Introduction to Fluorescence Efficiency

However, their fluorescence efficiency (ΦF) is still highly inferior to those of conventional NIR fluorescent dyes, seriously hindering their applications.

5) significantly increased basal diameter growth rate (DGR), chlorophyll content, peroxidase (POD) activity and qP, while decreased Chla/Chlb, fluorescence efficiency, non-photochemical quenching coefficient (NPQ), malondialdehyde (MDA) content and SOD activity.

It is found that Bi element is superior to other metal elements in terms of the contrast-to-noise ratio (CNR) and fluorescence efficiency, and the lowest concentration that can be detected is 0.

All the nanosystems were physicochemically characterized (morphology, diameter, size distribution and PS loaded amount) and photophysically studied (absorption capacity, fluorescence efficiency, and singlet oxygen production) in suspension.

The present findings demonstrate that controlling the time point of excitation light can enhance the fluorescence efficiency and performance of qPCR systems, with relevant benefits in medical diagnostics and rapid viral detection, among other applications.

It is worth noting that the fluorescence efficiency of EK01 is not outstanding in organisms, it has much stronger fluorescence efficiency in other organic solvent systems (such as DMF, acetone and CH2Cl2).

In optoelectronics, singlet-triplet inversion implies the possibility of 100% fluorescence efficiency of electron-hole recombination.

However, the fluorescence efficiency of PPE in aggregate states is generally not as good as their solution states, which greatly compromises their performance in fluorescence-related applications.

As the polarity of the solvent increased (from tetrahydrofuran (THF) to water), the emission spectrum of N, Cl-CDs was redshifted and the fluorescence efficiency decreased, which were attributed to hydrogen bond-induced aggregation.

However, in actual biological imaging, organic two-photon fluorescent dyes have disadvantages such as high biological toxicity and their fluorescence efficiency is easily affected by the complex environment in organisms.

It is of significance to investigate the molecular mechanism of the fluorophore-RNA aptamer bindings at the atomic level to seek a possible pathway to enhance the fluorescence efficiency of fluorophores.

However, the fluorescence efficiency of PPE in aggregate states is generally not as good as their solution states, which greatly compromises their performance in fluorescence-related applications.

Although for the latter case, there is still a long way to go to enhance its fluorescence efficiency and cross section of stimulated emission beforehand.

Singlet-chemiexcitation efficiency was less sensitive to the solvent than fluorescence efficiency of the emitter.

We will deeply emphasize the availability and analyze the importance of a fine device structure, fluorescence efficiency, material proportion, and integration position for performance improvement.

The steady-state absorption and emission results show that oxygen functionalization greatly improves the optical (absorption coefficient and fluorescence efficiency) and nonlinear optical (hyperpolarizability) features.

The analysis of the radiative decay rate constants and the reorganization energy indicate that the monomer emission is enhanced after host–guest complexation; meanwhile, combining host–guest interactions and aggregation effects could further increase the fluorescence efficiency, because both host–guest interactions and the aggregation effect can effectively retard the low-frequency intramolecular phenyl ring rotational motions and CC double bond plane twisting, thus suppressing the nonradiative decay channels.

In addition, the modification of terminal groups with different azetidine-heterospirocycles or N,N-dialkyl fused amino groups to Nile Red can effectively improve the fluorescence efficiency as well as increase the solubility to some extent.

The fluorescence quantum yield $(\Phi_f)$ of 1 decreases upon adding DMSO due to the shift in the keto-enol (E) tautomeric equilibrium toward E form․ On the contrary 2 demonstrates a tendency of increase of $\Phi_f$ upon adding DMSO due to intermolecular charge transfer from DMSO to the aromatic ring of quinoline, which increases the electron density on the ring and hence the fluorescence efficiency.

The fluorescence efficiency of atmospheric pollutants are obtained by calculating the fluorescence-to-Mie ratio (FMR).

Synergistically, electrospun nano- and microfibers offering large surface area can enhance the functionality of UCNPs by retaining the fluorescence efficiency and improving the overall responsivity due to dramatically increased surface.

To address these problems, we develop a robust and largely assumption-free scaling method that relates the fluorescence efficiency I of fluorophores to υυ through a dosage parameter ξ, which depends on the flow rate and laser power.

While ensembles of CdSe nanoplatelets (NPLs) show remarkably narrow photoluminescence linewidths at room temperature, adding a CdS shell to increase their fluorescence efficiency and photostability causes linewidth broadening.

Thus, the non-radiative energy consumption process is hindered by the restricted intramolecular rotation effect, which results in larger values of fluorescence efficiency for NZ2TPA (28.

These interactions cause the formation of a melamine-DNA-AgNC complex (Mel-DNA-AgNCs), in which a change in the environment of the DNA template causes binding of additional Ag+ and an enhancement in the fluorescence efficiency and stability.

The presented SAF structure has a reduced active area (50 μm) that allows enrichment of the fluorescence efficiency and reduces the amount of sample required for detection on the polymeric microfluidic chip.

Diffuse part of scattering is simulated with standard spectrograms well-known in many description of fluorescence: fluorescence efficiency and fluorescent emission.

The crosslinked structure is beneficial to the fluorescence efficiency.

The treatment of monodisperse carbon nanodots (MCNDs) with combination of aqueous ammonia and hydrogen peroxide is found to result in a prominent enhancement of their fluorescence efficiency.

Carbon dots (CDs) doped with heteroatom not only permits enhancement in fluorescence efficiency, but offers favourable sites in CDs to expand their utility in sensing of various chemical species.

The β-barrel structure of green fluorescent protein (GFP) provides a confined environment to enhance its fluorescence efficiency.

The fluorescence efficiency was preliminary estimated.

In particular, an ester derivative with a protected serine has a reasonable crystal packing leading to increase in fluorescence efficiency.

Upconversion fluorescent material such as NaYF4:Yb/Re (Re is lanthanide ions) nanoparticles has considerable application prospect, but the fluorescence efficiency is usually too low.

The open form shows similar absorption and emission spectrum, fluorescence efficiency and emission lifetime, regardless of the nature of the substituents.

Strong weakening of fluorescence efficiency at 530 nm and 560 nm and photoinduced darkening are observed under 1 kHz excitation, which is most probably caused by free carriers generated by two-photon absorption.