نتایج جستجو برای: dots
تعداد نتایج: 28154 فیلتر نتایج به سال:
Using a new graphical representation for partitions, the author obtains a family of partition identities associated with partitions into distinct parts of an arithmetic progression, or, more generally, with partitions into distinct parts of a set that is a finite union of arithmetic progressions associated with a modular sum–free Sidon set. Partition identities are also constructed for sets ass...
BACKGROUND The engagement of hospitals in Public-Private Mix (PPM) for Directly Observed Treatment Short-Course (DOTS) strategy has increased rapidly internationally - including in Indonesia. In view of the rapid global scaling-up of hospital engagement, we aimed to estimate the proportion of outpatient adult Tuberculosis patients who received standardized diagnosis and treatment at outpatients...
In this paper, we present calculations for different parameters of quantum dot infrared photodetectors. We considered a structure which includes quantum dots with large conduction-band-offset materials (GaN/AlGaN). Single band effective mass approximation has been applied in order to calculate the electronic structure. Throughout the modeling, we tried to consider the limiting factors which dec...
Jellybean Quantum Dots Highly elliptical, elongated, quantum dots—so-called jellybean dots—can be used for qubit–qubit coupling over short-to-intermediate distances and alleviate crowding in scaled-up processors, as described by Zeheng Wang, Arne Laucht, co-workers article number 2208557. The cover illustration shows an artist's impression of two spin qubits silicon metal–oxide–semiconductor do...
The spontaneous-emission lifetime of CdSe/CdS core-shell quantum dots was studied as a function of the distance between the dots and a polished Si surface. The experimental results reveal a significant modification of the spontaneous-emission rate of the quantum dots by the Si surface.
Nitrogen-doped, PEGylated carbon dots (C-dots) have been synthesized for the detection of mercury ions (Hg(2+)). The detection limit was found to be 6.8 nM. However, upon functionalization with dithiothreitol (DTT), it reached to as low as 18 pM. The C-dots-Hg(2+) system was also able to efficiently detect biothiols.
A system of two coupled quantum dots entangled through their interaction with a cavity mode, including Förster and exciton-phonon interactions, exhibits violation of Bell’s inequality at certain interaction times of these dots with the field mode. The effects of relative positions of these dots in the cavity and exciton-phonon and Förster interaction strengths on the violation of Bell’s inequal...
We report that nanoscale carbon particles (carbon dots) upon simple surface passivation are strongly photoluminescent in both solution and the solid state. The luminescence emission of the carbon dots is stable against photobleaching, and there is no blinking effect. These strongly emissive carbon dots may find applications similar to or beyond those of their widely pursued silicon counterparts.
Carbon dots show potential in lighting and displays. However, only their fluorescence has been observed so far. Here we report the observation of phosphorescence from carbon dots in a polyvinyl alcohol matrix. The phosphorescence is attributed to C=O bonds on the surface of carbon dots and has a very long lifetime (~380 ms).
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