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Green and Sustainable Manufacture of Ultrapure Engineered Nanomaterials

green
engineering
nanomaterials
tunable
nanoclusters
nanoalloys
nanostructures
Ortiz de Zárate D, García-Meca C, Pinilla-Cienfuegos E, Ayúcar JA, Griol A, Bellières L, Hontañón E, Kruis FE, Martí J.
Nanomaterials (Basel). 2020 Mar 5;10(3):466.
https://doi.org/10.3390/nano10030466

Nanomaterials with very specific features (purity, colloidal stability, composition, size, shape, location…) are commonly requested by cutting-edge technologic applications, and hence a sustainable process for the mass-production of tunable/engineered nanomaterials would be desirable. Despite this, tuning nano-scale features when scaling-up the production of nanoparticles/nanomaterials has been considered the main technological barrier for the development of nanotechnology. Aimed at overcoming these challenging frontier, a new gas-phase reactor design providing a shorter residence time, and thus a faster quenching of nanoclusters growth, is proposed for the green, sustainable, versatile, cost-effective, and scalable manufacture of ultrapure engineered nanomaterials (ranging from nanoclusters and nanoalloys to engineered nanostructures) with a tunable degree of agglomeration, composition, size, shape, and location. This method enables: (1) more homogeneous, non-agglomerated ultrapure Au-Ag nanoalloys under 10 nm; (2) 3-nm non-agglomerated ultrapure Au nanoclusters with lower gas flow rates; (3) shape-controlled Ag NPs; and (4) stable Au and Ag engineered nanostructures: nanodisks, nanocrosses, and 3D nanopillars. In conclusion, this new approach paves the way for the green and sustainable mass-production of ultrapure engineered nanomaterials.

Keywords: green; engineering; nanomaterials; tunable; nanoclusters; nanoalloys; nanostructures

Funding

This research was funded by the European Union’s Seventh Framework Programme (EU FP7) under grant agreement number 280765 (BUONAPART-e), the PROMETEO Program (Ref.2019/123) - Generalitat Valenciana, FEDER/Ministerio de Ciencia e Innovación– Agencia Estatal de Investigación/Ref.ICTS-2017-28-UPV-9 and co-funded by European Union’s operative program FEDER/Comunitat Valenciana 2014-2020. C.G.-M. acknowledges support from Agencia Estatal de Investigación AEI/FEDER (EU) under Grant Agreement TEC2015-73581-JIN PHUTURE. E.P.-C. acknowledges support from the Spanish Ministry of Economy and Competiveness (MINECO) under Grant Agreement FJCI-2015-27228 and TEC2017-92037-EXP. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.

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