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This article aims to alert about the relevance of nanosciences and nanotechnology accompanied by nanometrology for the nations development in the 21st century. Scielo was used as a database, with the keywords: nanotechnology, nanomedicine, Cuban health units. The article makes an approach to nanotechnology with an international and regional approach. It describes some applications of nanotechnologies, with an emphasis on nanomedicine, as well as the dilemmas and ethical considerations associated with them. It advises about these developments' harmfulness to human health, also defends the idea that nanometrology is essential for the technological developments achievement, with greater relevance in the nanomedicine field, as well as that nanotechnology should be treated as the 21st century science due to the social, cultural and economic impact that will have, and this can change the world. [ABSTRACT FROM AUTHOR]

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In the last decade it has been seen how the economic, social and environmental problems due to the generation and transportation of electric power have increased, this has led researchers from various areas of engineering to engage in the search for efficient materials for the development of renewable energy sources. Several investigations could yield helpful insights that one of the materials that are already beginning to be used for the development of renewable energy sources, is graphene. Graphene is a two-dimensional nanometric material, formed by a hexagonal network of carbon atoms very similar to a honeycomb. In 2004, thanks to the research of scientists from the University of Manchester in the United Kingdom, one of the main drawbacks of this material was overcome. Thermodynamic instability at a nanometric scale was overcome, and a new era of study and research in two-dimensional nanometric materials started. This article shows the main properties of graphene and its behavior in the development of renewable energy sources, in which after analyzing its performance and its impact compared to the current energy sources used, it shows that we are facing to a material that is a fundamental pillar in the development of new, more efficient renewable energy sources. [ABSTRACT FROM AUTHOR]

Copyright of Ciencia e Ingenieria Neogranadina is the property of Ciencia e Ingenieria Neogranadina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)