نتایج جستجو برای: graphene quantum dot
تعداد نتایج: 355607 فیلتر نتایج به سال:
application of quantum-dot is a promising technology for implementing digital systems at nano-scale. quantum-dot cellular automata (qca) is a system with low power consumption and a potentially high density and regularity. also, qca supports the new devices with nanotechnology architecture. this technique works based on electron interactions inside quantum-dots leading to emergence of quantum ...
The realization of low-cost photodetectors with high sensitivity, high quantum efficiency, high gain and fast photoresponse in the visible and short-wave infrared remains one of the challenges in optoelectronics. Two classes of photodetectors that have been developed are photodiodes and phototransistors, each of them with specific drawbacks. Here we merge both types into a hybrid photodetector ...
Graphene quantum dot-doped polyaniline composites have been prepared by the chemical oxidation of aniline. Synthesized novel fibrous composites show an excellent specific capacitance value of ∼1044 F g(-1) at a current density of 1 A g(-1) as well as moderate cyclic stability with a retention of life time of 80.1% after 3000 cycles.
We determined the electromechanical properties of a suspended graphene layer by scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) measurements, as well as computational simulations of the graphene-membrane mechanics and morphology. A graphene membrane was continuously deformed by controlling the competing interactions with a STM probe tip and the electric field from ...
In this study, quantum capacitance of graphene-based electrodes is evaluated using Density Functional Theory (DFT) calculations. The obtained results showed that quantum capacitance of graphene-based supercapacitors could be significantly improved by existence of structural defects on the graphene sheets at sufficiently high concentrations because of creating impure states resulted from carbon ...
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