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Rationally Designed Complex, Hierarchical Microarchitectures.

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Title: Rationally Designed Complex, Hierarchical Microarchitectures.
Authors: Noorduin, Wim L., Grinthal, Alison, Mahadevan, L., Aizenberg, Joanna
Source: Science (pre-March 2025). 5/17/2013, Vol. 340 Issue 6134, p832-837. 6p.
Subjects: Molecular self-assembly, Nanostructures, Microstructure, Solution (Chemistry), Reaction-diffusion equations, Lithography techniques
Abstract: The emergence of complex nano- and microstructures is of fundamental interest, and the ability to program their form has practical ramifications in fields such as optics, catalysis, and electronics. We developed carbonate-silica microstructures in a dynamic reaction-diffusion system that allow us to rationally devise schemes for precisely sculpting a great variety of elementary shapes by diffusion of carbon dioxide (CO2) in a solution of barium chloride and sodium metasilicate. We identify two distinct growth modes and show how continuous and discrete modulations in CO2 concentration, pH, and temperature can be used to deterministically switch between different regimes and create a bouquet of hierarchically assembled multiscale microstructures with unprecedented levels of complexity and precision. These results outline a nanotechnology strategy for "collaborating" with self-assembly processes in real time to build arbitrary tectonic architectures. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. 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.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Rationally Designed Complex, Hierarchical Microarchitectures.
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  Data: <searchLink fieldCode="AR" term="%22Noorduin%2C+Wim+L%2E%22">Noorduin, Wim L.</searchLink><br /><searchLink fieldCode="AR" term="%22Grinthal%2C+Alison%22">Grinthal, Alison</searchLink><br /><searchLink fieldCode="AR" term="%22Mahadevan%2C+L%2E%22">Mahadevan, L.</searchLink><br /><searchLink fieldCode="AR" term="%22Aizenberg%2C+Joanna%22">Aizenberg, Joanna</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 5/17/2013, Vol. 340 Issue 6134, p832-837. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Molecular+self-assembly%22">Molecular self-assembly</searchLink><br /><searchLink fieldCode="DE" term="%22Nanostructures%22">Nanostructures</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Solution+%28Chemistry%29%22">Solution (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Reaction-diffusion+equations%22">Reaction-diffusion equations</searchLink><br /><searchLink fieldCode="DE" term="%22Lithography+techniques%22">Lithography techniques</searchLink>
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  Data: The emergence of complex nano- and microstructures is of fundamental interest, and the ability to program their form has practical ramifications in fields such as optics, catalysis, and electronics. We developed carbonate-silica microstructures in a dynamic reaction-diffusion system that allow us to rationally devise schemes for precisely sculpting a great variety of elementary shapes by diffusion of carbon dioxide (CO2) in a solution of barium chloride and sodium metasilicate. We identify two distinct growth modes and show how continuous and discrete modulations in CO2 concentration, pH, and temperature can be used to deterministically switch between different regimes and create a bouquet of hierarchically assembled multiscale microstructures with unprecedented levels of complexity and precision. These results outline a nanotechnology strategy for "collaborating" with self-assembly processes in real time to build arbitrary tectonic architectures. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. 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.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=87740081
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        Value: 10.1126/science.1234621
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        Text: English
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        PageCount: 6
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      – SubjectFull: Molecular self-assembly
        Type: general
      – SubjectFull: Nanostructures
        Type: general
      – SubjectFull: Microstructure
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      – SubjectFull: Reaction-diffusion equations
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      – SubjectFull: Lithography techniques
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              M: 05
              Text: 5/17/2013
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              Y: 2013
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