Sentences with phrase «quantum yield»

Concerning the deviations of the fluorescence quantum yield of eqFP650 from the value of 0.24 reported by Shcherbo et al. (15), we can only speculate, as the performance of these measurements including instrument calibration were not included.

Rhodamine 101 in ethanol was used as fluorescence quantum yield standard for both excitation conditions.

The narrow bandgap with around 0.19 µm average photocarriers diffusion length and high quantum yield of SnS2 thus possesses two advantages for a good photocatalyst under visible light.

Nonetheless, this dramatic increase in quantum yield realized with a uniquely innovative lead sulfide quantum dot photoelectrochemical device is an important development in several ways, and as such is a product of Yan's long - standing interest in renewable sources of energy, especially in novel applications of solar energy.

Transition - metal dichalcogenide monolayers have naturally terminated surfaces and can exhibit a near - unity photoluminescence quantum yield in the presence of suitable defect passivation.

Yan, who joined the NJIT faculty in 2016, emphasizes that this advance is at the level of basic solar science, and that the breakthrough with respect to quantum yield does not equate to a substantial increase in the ultimate solar - to - hydrogen conversion efficiency.

The article, «Multiple exciton generation for photoelectrochemical hydrogen evolution reactions with quantum yields exceeding 100 %,» reports on the investigative work that Yan carried out along with colleagues affiliated with the National Renewable Energy Laboratory, the Colorado School of Mines and San Diego State University.

Here, we demonstrate that the optical gain properties of a newly synthesised and very luminescent (absolute PL quantum yield 79 %) nanographene molecule, namely dibenzo [hi, st] ovalene (DBOV 1) can be preserved in the solid state by simply blending the active molecule with polystyrene (PS).

The fluorescence quantum yield values (Φf) of the fluorescent protein were calculated from integrated, blank, and spectrally corrected emission spectra relative to the standard Rhodamine 101 solved in ethanol (Φf = 0.915)[29] using the following formula [30].

The mesocrystal also exhibits a high quantum yield of 6.7 % at 360 nm in overall... Read more →

«By inducing the self - photosensitization of M. thermoacetica with cadmium sulfide nanoparticles, we enabled the photosynthesis of acetic acid from carbon dioxide over several days of light - dark cycles at relatively high quantum yields, demonstrating a self - replicating route toward solar - to - chemical carbon dioxide reduction.»

With their low light loss and high photoluminescence quantum yield, these novel one - dimensional microstructures could serve as an effective platform for the development of new systems of color tunable optical waveguides with polarized emissions.

The shorter lifetimes found for the Amrose proteins correlate with their smaller fluorescence quantum yields.

At present, the quantum yield is still low, and the improvement of the yield is the challenge for the future.

Professor Chih - Jen Shih who created the quantum dots and led the investigation at ETH Zurich, commented: «Normally the quantum yield, which determines the brightness, degrades significantly as quantum dots aggregate, forming crystalline solids.

They could obtain uniform perovskite nanocrystals in sizes ranging from 2.5 to 100 nanometers, with high photoluminescence quantum yield, a measure of fluorescence that is critical to the performance of perovskites in a variety of applications.

We now show that a bacteriophytochrome from Deinococcus radiodurans, incorporating biliverdin as the chromophore, can be engineered into monomeric, infrared - fluorescent proteins (IFPs), with excitation and emission maxima of 684 and 708 nm, respectively; extinction coefficient > 90,000 M − 1 cm − 1; and quantum yield of 0.07.

It clearly proves that the photoelectrochemical cell design he describes is much more efficient than a quantum dot solar cell with respect to quantum yield.

These jumps were shown not to result from spectral diffusion and were attributed to fluctuations in the quantum yield of emission for the molecules.

Generally, a 100 % efficient fluorescence process would have a quantum yield of 1 (the maximum quantum yield possible).

These are indicated by the extinction coefficient (EC) and quantum yield (QY) respectively.

The details photocatalytic performance, quantum yield, product selectivity of solar chemicals and theoretical study will be discussed on the presentation.

The quantum yield is a read - out of the efficiency of the fluorescence process (Φ) and is calculated by dividing the number of emitted photons by the number of absorbed photons.

Structure - guided evolution of cyan fluorescent proteins towards a quantum yield of 93 %.

mTurquoise2 has a quantum yield of 93 % which is among the highest of all characterized monomeric fluorescent proteins.

CyOFP1 has a higher quantum yield, brightness and improved maturation time compared to similar orange fluorescent proteins.

Fluorescence quantum yield measurements with Amrose 0 — 4, eqFP615, and eqFP650 in PBS reveal quantum yields in the order of 0.02 — 0.03 for the Amrose proteins as compared to values of 0.18 and 0.12 found for eqFP615 and eqFP650, respectively, see Table 1.