Enhancing nanoscale charged colloid crystallization near a metastable liquid binodal
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912351585828864 |
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| author | Tanner, Christian P. N. Wall, Vivian R. K. Portner, Joshua Jeong, Ahhyun Das, Avishek Utterback, James K. Hamerlynck, Leo M. Raybin, Jonathan G. Hurley, Matthew J. Leonard, Nicholas Wai, Rebecca B. Tan, Jenna A. Gababa, Mumtaz Zhu, Chenhui Schaible, Eric Tassone, Christopher J. Limmer, David T. Teitelbaum, Samuel W. Talapin, Dmitri V. Ginsberg, Naomi S. |
| author_facet | Tanner, Christian P. N. Wall, Vivian R. K. Portner, Joshua Jeong, Ahhyun Das, Avishek Utterback, James K. Hamerlynck, Leo M. Raybin, Jonathan G. Hurley, Matthew J. Leonard, Nicholas Wai, Rebecca B. Tan, Jenna A. Gababa, Mumtaz Zhu, Chenhui Schaible, Eric Tassone, Christopher J. Limmer, David T. Teitelbaum, Samuel W. Talapin, Dmitri V. Ginsberg, Naomi S. |
| contents | Bottom-up assembly of nanocrystals (NCs) into ordered arrays, or superlattices (SLs), is a promising route to design materials with new functionalities, but the degree of control over assembly into functional structures remains challenging. Using electrostatics, rather than density, to tune the interactions between semiconductor NCs, we watch self-assembly proceeding through a metastable liquid phase. We systematically investigate the phase behavior as a function of quench conditions in situ and in real time using small angle X-ray scattering (SAXS). Through quantitative fitting to colloid, liquid, and SL models, we extract the time evolution of each phase and the system phase diagram, which we find to be consistent with short-range attractive interactions. Using the phase diagram's predictive power, we establish control of the self-assembly rate over three orders of magnitude, and identify one- and two-step self-assembly regimes, with only the latter implicating the metastable liquid as an intermediate. Importantly, the presence of the metastable liquid increases SL formation rates relative to the equivalent one-step pathway, and SL order counterintuitively increases with the rate, revealing a highly desirable and generalizable kinetic strategy to promote and enhance ordered assembly. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_16808 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Enhancing nanoscale charged colloid crystallization near a metastable liquid binodal Tanner, Christian P. N. Wall, Vivian R. K. Portner, Joshua Jeong, Ahhyun Das, Avishek Utterback, James K. Hamerlynck, Leo M. Raybin, Jonathan G. Hurley, Matthew J. Leonard, Nicholas Wai, Rebecca B. Tan, Jenna A. Gababa, Mumtaz Zhu, Chenhui Schaible, Eric Tassone, Christopher J. Limmer, David T. Teitelbaum, Samuel W. Talapin, Dmitri V. Ginsberg, Naomi S. Soft Condensed Matter Mesoscale and Nanoscale Physics Materials Science Bottom-up assembly of nanocrystals (NCs) into ordered arrays, or superlattices (SLs), is a promising route to design materials with new functionalities, but the degree of control over assembly into functional structures remains challenging. Using electrostatics, rather than density, to tune the interactions between semiconductor NCs, we watch self-assembly proceeding through a metastable liquid phase. We systematically investigate the phase behavior as a function of quench conditions in situ and in real time using small angle X-ray scattering (SAXS). Through quantitative fitting to colloid, liquid, and SL models, we extract the time evolution of each phase and the system phase diagram, which we find to be consistent with short-range attractive interactions. Using the phase diagram's predictive power, we establish control of the self-assembly rate over three orders of magnitude, and identify one- and two-step self-assembly regimes, with only the latter implicating the metastable liquid as an intermediate. Importantly, the presence of the metastable liquid increases SL formation rates relative to the equivalent one-step pathway, and SL order counterintuitively increases with the rate, revealing a highly desirable and generalizable kinetic strategy to promote and enhance ordered assembly. |
| title | Enhancing nanoscale charged colloid crystallization near a metastable liquid binodal |
| topic | Soft Condensed Matter Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2404.16808 |