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Very recently, we have witnessed a rapidly growing interest in the scientific community proposing sunlight absorbers for direct conversion of liquid water into steam. While those solutions can possibly be of interest from the perspective of the involved novel materials, in this study we intend to demonstrate that efficient steam generation by solar source is mainly due to a combination of efficient solar absorption, capillary water feeding and narrow gap evaporation process, which can also be achieved through common materials. To this end, we report both numerical and experimental evidence that advanced nano-structured materials are not strictly necessary for performing sunlight driven water-to-vapor conversion at high efficiency (i.e. \u226585%) and relatively low optical concentration (\u224810 suns). Coherently with the principles of frugal innovation, those results unveil that solar steam generation for desalination or sterilization purposes may be efficiently obtained by a clever selection and assembly of widespread and inexpensive materials.<\/jats:p>","DOI":"10.1038\/s41598-017-12152-6","type":"journal-article","created":{"date-parts":[[2017,9,14]],"date-time":"2017-09-14T11:24:39Z","timestamp":1505388279000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":57,"title":["Efficient steam generation by inexpensive narrow gap evaporation device for solar applications"],"prefix":"10.1038","volume":"7","author":[{"given":"Matteo","family":"Morciano","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3997-3681","authenticated-orcid":false,"given":"Matteo","family":"Fasano","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Uktam","family":"Salomov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luigi","family":"Ventola","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6165-7434","authenticated-orcid":false,"given":"Eliodoro","family":"Chiavazzo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1814-3846","authenticated-orcid":false,"given":"Pietro","family":"Asinari","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2017,9,20]]},"reference":[{"key":"12152_CR1","doi-asserted-by":"crossref","unstructured":"Edenhofer, O. et al. 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