Abstract Superlattices were introduced 40 years ago as man-made solids to enrich the class of materials for electronic and optoelectronic applications. The field metamorphosed to quantum wells and quantum dots. with ever decreasing dimensions dictated by the technological advancements in nanometer regime. In recent years. https://www.marcelovicente.com/product-category/shampoo-and-scalp-massage-brushes/