Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing

Optical printing holds great potential to enable the use of the vast variety of colloidal nanoparticles (NPs) in nano- and microdevices and circuits. By means of optical forces, it enables the direct assembly of NPs, one by one, onto specific positions of solid surfaces with great flexibility of pat...

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Publicado:	2017
Materias:	colloidal patterning graphene optical forces Plasmonics reduced graphene oxide thermo-osmosis thermophoresis Electromagnetic wave absorption Graphene Light absorption Nanoparticles Nanostructures Printing Sapphire Thermophoresis Colloidal nanoparticles Colloidal patterning Optical force Photothermal forces Reduced graphene oxides Sapphire substrates Surface patterning Gold
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15306984_v17_n9_p5747_Gargiulo http://hdl.handle.net/20.500.12110/paper_15306984_v17_n9_p5747_Gargiulo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_15306984_v17_n9_p5747_Gargiulo
record_format	dspace
spelling	paper:paper_15306984_v17_n9_p5747_Gargiulo2023-06-08T16:19:48Z Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing colloidal patterning graphene optical forces Plasmonics reduced graphene oxide thermo-osmosis thermophoresis Electromagnetic wave absorption Graphene Light absorption Nanoparticles Nanostructures Printing Sapphire Thermophoresis Colloidal nanoparticles Colloidal patterning Optical force Photothermal forces Plasmonics Reduced graphene oxides Sapphire substrates Surface patterning Gold Optical printing holds great potential to enable the use of the vast variety of colloidal nanoparticles (NPs) in nano- and microdevices and circuits. By means of optical forces, it enables the direct assembly of NPs, one by one, onto specific positions of solid surfaces with great flexibility of pattern design and no need of previous surface patterning. However, for unclear causes it was not possible to print identical NPs closer to each other than 300 nm. Here, we show that the repulsion restricting the optical printing of close by NPs arises from light absorption by the printed NPs and subsequent local heating. By optimizing heat dissipation, it is possible to reduce the minimum separation between NPs. Using a reduced graphene oxide layer on a sapphire substrate, we demonstrate for the first time the optical printing of Au - Au NP dimers. Modeling the experiments considering optical, thermophoretic, and thermo-osmotic forces we obtain a detailed understanding and a clear pathway for the optical printing fabrication of complex nano structures and circuits based on connected colloidal NPs. © 2017 American Chemical Society. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15306984_v17_n9_p5747_Gargiulo http://hdl.handle.net/20.500.12110/paper_15306984_v17_n9_p5747_Gargiulo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	colloidal patterning graphene optical forces Plasmonics reduced graphene oxide thermo-osmosis thermophoresis Electromagnetic wave absorption Graphene Light absorption Nanoparticles Nanostructures Printing Sapphire Thermophoresis Colloidal nanoparticles Colloidal patterning Optical force Photothermal forces Plasmonics Reduced graphene oxides Sapphire substrates Surface patterning Gold
spellingShingle	colloidal patterning graphene optical forces Plasmonics reduced graphene oxide thermo-osmosis thermophoresis Electromagnetic wave absorption Graphene Light absorption Nanoparticles Nanostructures Printing Sapphire Thermophoresis Colloidal nanoparticles Colloidal patterning Optical force Photothermal forces Plasmonics Reduced graphene oxides Sapphire substrates Surface patterning Gold Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing
topic_facet	colloidal patterning graphene optical forces Plasmonics reduced graphene oxide thermo-osmosis thermophoresis Electromagnetic wave absorption Graphene Light absorption Nanoparticles Nanostructures Printing Sapphire Thermophoresis Colloidal nanoparticles Colloidal patterning Optical force Photothermal forces Plasmonics Reduced graphene oxides Sapphire substrates Surface patterning Gold
description	Optical printing holds great potential to enable the use of the vast variety of colloidal nanoparticles (NPs) in nano- and microdevices and circuits. By means of optical forces, it enables the direct assembly of NPs, one by one, onto specific positions of solid surfaces with great flexibility of pattern design and no need of previous surface patterning. However, for unclear causes it was not possible to print identical NPs closer to each other than 300 nm. Here, we show that the repulsion restricting the optical printing of close by NPs arises from light absorption by the printed NPs and subsequent local heating. By optimizing heat dissipation, it is possible to reduce the minimum separation between NPs. Using a reduced graphene oxide layer on a sapphire substrate, we demonstrate for the first time the optical printing of Au - Au NP dimers. Modeling the experiments considering optical, thermophoretic, and thermo-osmotic forces we obtain a detailed understanding and a clear pathway for the optical printing fabrication of complex nano structures and circuits based on connected colloidal NPs. © 2017 American Chemical Society.
title	Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing
title_short	Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing
title_full	Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing
title_fullStr	Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing
title_full_unstemmed	Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing
title_sort	understanding and reducing photothermal forces for the fabrication of au nanoparticle dimers by optical printing
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15306984_v17_n9_p5747_Gargiulo http://hdl.handle.net/20.500.12110/paper_15306984_v17_n9_p5747_Gargiulo
_version_	1768545755303247872

Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing

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