Electric-Field-Oriented Growth of Long Hair-Like Silica Microfibrils and Derived Functional Monolithic Solids

doi:10.2174/1872210511666170420145704

Title: Electric-Field-Oriented Growth of Long Hair-Like Silica Microfibrils and Derived Functional Monolithic Solids

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Abstract

We present a “bottom-up” fabrication approach to first grow a new class of inorganic (silica) long hair-like microfibers or microwires and then to form monolithic solid pellet that contains parallel arrays of bundled microfibers with a controlled orientation. During the sol-gel solution processing, reactive precursor species are utilized as molecular “building blocks” for the field-directed assembly growth of microfibers driven by an electric field of pulsed direct current (dc) with controlled frequency. In principle, this reactive electrofibrilation process that combines an external field with a solid-phase nucleation and growth process has no limitation on reactions (such as the one here that involves sol-gel reaction chemistry) and on materials compositions (such as the example silica oxide), thus will enable bulk production of long microfibers of wide variety of inorganic materials (other oxides or metals). Furthermore, we have fabricated uniquely architectured monolithic solid materials containing aligned microfibers by “wet press” of the in-situ grown microfiber structure in the electric field. The consolidated monolithic slabs (1 cm x 1 cm x 3 mm) have shown anisotropic properties and desirable retention of DNA molecule fragments, thus, could serve as a platform stationary-phase materials for future development of capillary electrochromatography for biomolecule separations.

Authors:

Hu, Michael Z. ^[1]; DePaoli, David W. ^[1]; Kuritz, Tanya ^[1]; Omatete, Ogbemi O. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: 2017-09-11

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1408658

Alternate Identifier(s):: OSTI ID: 1495991

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Recent Patents on Nanotechnology

Additional Journal Information:: Journal Volume: 11; Journal Issue: 3; Journal ID: ISSN 1872-2105

Publisher:: Bentham Science

Country of Publication:: United States

Language:: English

Subject:: 77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats


                    Hu, Michael Z., DePaoli, David W., Kuritz, Tanya, and Omatete, Ogbemi O. Electric-Field-Oriented Growth of Long Hair-Like Silica Microfibrils and Derived Functional Monolithic Solids.  United States: N. p., 2017. 
        Web.  doi:10.2174/1872210511666170420145704.

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                    Hu, Michael Z., DePaoli, David W., Kuritz, Tanya, & Omatete, Ogbemi O. Electric-Field-Oriented Growth of Long Hair-Like Silica Microfibrils and Derived Functional Monolithic Solids.  United States.  doi:10.2174/1872210511666170420145704.

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                    Hu, Michael Z., DePaoli, David W., Kuritz, Tanya, and Omatete, Ogbemi O. Mon .  
        "Electric-Field-Oriented Growth of Long Hair-Like Silica Microfibrils and Derived Functional Monolithic Solids".  United States.  doi:10.2174/1872210511666170420145704.  https://www.osti.gov/servlets/purl/1408658.

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@article{osti_1408658,

  title        = {Electric-Field-Oriented Growth of Long Hair-Like Silica Microfibrils and Derived Functional Monolithic Solids},

  author       = {Hu, Michael Z. and DePaoli, David W. and Kuritz, Tanya and Omatete, Ogbemi O.},

  abstractNote = {We present a “bottom-up” fabrication approach to first grow a new class of inorganic (silica) long hair-like microfibers or microwires and then to form monolithic solid pellet that contains parallel arrays of bundled microfibers with a controlled orientation. During the sol-gel solution processing, reactive precursor species are utilized as molecular “building blocks” for the field-directed assembly growth of microfibers driven by an electric field of pulsed direct current (dc) with controlled frequency. In principle, this reactive electrofibrilation process that combines an external field with a solid-phase nucleation and growth process has no limitation on reactions (such as the one here that involves sol-gel reaction chemistry) and on materials compositions (such as the example silica oxide), thus will enable bulk production of long microfibers of wide variety of inorganic materials (other oxides or metals). Furthermore, we have fabricated uniquely architectured monolithic solid materials containing aligned microfibers by “wet press” of the in-situ grown microfiber structure in the electric field. The consolidated monolithic slabs (1 cm x 1 cm x 3 mm) have shown anisotropic properties and desirable retention of DNA molecule fragments, thus, could serve as a platform stationary-phase materials for future development of capillary electrochromatography for biomolecule separations.},

  doi          = {10.2174/1872210511666170420145704},

  journal      = {Recent Patents on Nanotechnology},

  number       = 3,

  volume       = 11,

  place        = {United States},

  year         = {2017},

  month        = {9}

}

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