Directed assembly of nanoparticles along predictable large-scale patterns using micromolded hydrogels
| Autor: | Houssam Hajjoul, Fabrice Severac, Qihao He, Aurélien Bancaud, Yannick Viero |
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| Přispěvatelé: | Université de Toulon (UTLN), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2011 |
| Předmět: |
[PHYS]Physics [physics]
Fabrication Materials science Scale (ratio) Nanoparticle Nanotechnology 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Self-healing hydrogels Electrochemistry General Materials Science Microparticle 0210 nano-technology Spectroscopy ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Langmuir Langmuir, American Chemical Society, 2011, 27 (11), pp.6598-6605. ⟨10.1021/la200064n⟩ Langmuir, 2011, 27 (11), pp.6598-6605. ⟨10.1021/la200064n⟩ |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | We present a new technology to organize microparticles and nanoparticles along micropatterns of variable complexity over centimeter-squared surfaces. This technology relies on the fabrication of textured hydrogels, which serve as templates for directed assembly after the deposition of a droplet of colloids on their surfaces. We show that directed assembly occurs spontaneously during water evaporation, and we demonstrate the efficiency of this mechanism for a variety of organic and inorganic nano-objects. The dynamics of this process is also uncovered by light microscopy, showing that the patterns imprinted on the gel determine fluid flow during water evaporation and allow for directed movements toward predictable positions. We finally propose different methods to transfer assembled particles from hydrogels to glass, silicon, or metallic surfaces, and we show that the assembled and transferred particles retain their surface properties for bioassays. Beyond the originality of this spontaneous assembly mechanism, it constitutes an attractive technology for nano-object large-scale integration, which does not require costly environmental control equipment. |
| Databáze: | OpenAIRE |
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