A noninteracting Quantum-dot arrays side coupled to a Quantum wire is studied. Transport through the Quantum wire is investigated by using a noninteracting Anderson tunneling Hamiltonian. The conductance at zero temperature develops an oscillating band with resonances and antiresonances due to constructive and destructive interference in the ballistic channel, respectively. Moreover, we have found the number of antiresonant exactly depends on the number of Quantum dot in every array and increasing array make antiresonants wide increase.

Quantum dots (QDs) are nanoparticles (NPs) with electronic and optical properties such as emitting bright light and fluorescence. They also carry specific characters such as photostability, high Quantum yield, high emission, and size-turnable. Nowadays, a great interest is given to the extensive use of theranostic-NPs for sensing and imaging, as well as drug delivery. Moreover, QDs may yield great potential for the diagnosis and treatment of various central nervous system (CNS) diseases (e. g., Parkinson’, s disease, Alzheimer’, s disease, and multiple sclerosis). The blood-brain barrier (BBB) protects the brain tissue. Only certain small molecules like water and gases can cross BBB, whereas larger molecules enter via receptors, but many drugs are incapable of passing the barrier. A series of great advances have been achieved concerning using different NPs (e. g., QDs) to deliver drugs to the brain and CNS imaging. In this review, we discussed a wide variety of QDs along with their production, passive or active delivery of therapeutic agents for neurodegenerative diseases, and different image production.

Quantum dots are a group of semiconductors nanomaterials whose size is about less than 10 nm exhibiting unique optical and electric properties which impart different advantages in terms of wide and continuous absorption spectra, narrow emission spectra, high Quantum yield, long fluorescence lifetimes, and high photostability. Based on the unique properties of Quantum dots have a variety of applications. This review informs about Quantum dots structure, properties of Quantum dots, surface modification of Quantum dots for biocompatible, synthesis process and its important application like labeling cell structure and FRET (Fluorescence resonance energy transfer). Quantum dots as bio-sensors, bio-marker, and bio-imagine are used in many therapeutic systems. Several attractive applications have been observed with supramolecular compounds: Calix-4 arenes derivatives with Quantum dots in the field of medical science.