**3. Conclusion**

The endorsement of quantum dots (QDs) has led to swift developments in multifunctional QDs applications over the early few years throughout the world amidst the advanced scientific improvements, though confirmations, moreover, validate that it has been more extensive and extremely significant in the way of innovative examination in contradiction of novel applications for the societal prerequisite. Amongst the major noteworthy progress in diverse fields of QDs the roadmap for next-generation QDs points to the advent of single-electron transistors, single-photon sources, solar cells, μ-LEDs, lasers, quantum computing, second-harmonic generation, microscopy, cell biology research, and medical imaging, etc., highly necessary for the societal benign. However, a probable drawback when utilized in biological applications is the fact that owing to their large physical size, they could not prolix across cellular membranes. Also, the delivery process may essentially be hazardous for the cell and even affect in destroying it. In other cases, a QD may be venomous for the cell and not suitable for any biological application. The dispute on the degradation of quantum dots inside the living organism has to be explored in the near future. Thus, studies on superior QDs hi-tech vicinities might pay way to atoms/molecules that might perchance turn out to be the upcoming policies of multifunctional prospects in the forthcoming outline.

*Introductory Chapter: The Fame of Quantum Dots in Space-age Improvements… DOI: http://dx.doi.org/10.5772/intechopen.108639*
