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Lak A, Wang Y, Kolbeck PJ, Pauer C, Chowdhury MS, Cassani M, Ludwig F, Viereck T, Selbach F, Tinnefeld P, Schilling M, Liedl T, Tavacoli J, Lipfert J. Cooperative dynamics of DNA-grafted magnetic nanoparticles optimize magnetic biosensing and coupling to DNA origami. NANOSCALE 2024; 16:7678-7689. [PMID: 38533617 DOI: 10.1039/d3nr06253h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Magnetic nanoparticles (MNPs) provide new opportunities for enzyme-free biosensing of nucleic acid biomarkers and magnetic actuation by patterning on DNA origami, yet how the DNA grafting density affects their dynamics and accessibility remains poorly understood. Here, we performed surface functionalization of MNPs with single-stranded DNA (ssDNA) via click chemistry with a tunable grafting density, which enables the encapsulation of single MNPs inside a functional polymeric layer. We used several complementary methods to show that particle translational and rotational dynamics exhibit a sigmoidal dependence on the ssDNA grafting density. At low densities, ssDNA strands adopt a coiled conformation that results in minor alterations to particle dynamics, while at high densities, they organize into polymer brushes that collectively influence particle dynamics. Intermediate ssDNA densities, where the dynamics are most sensitive to changes, show the highest magnetic biosensing sensitivity for the detection of target nucleic acids. Finally, we demonstrate that MNPs with high ssDNA grafting densities are required to efficiently couple to DNA origami. Our results establish ssDNA grafting density as a critical parameter for the functionalization of MNPs for magnetic biosensing and functionalization of DNA nanostructures.
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Affiliation(s)
- Aidin Lak
- Institute for Electrical Measurement Science and Fundamental Electrical Engineering and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig, 38106, Germany.
| | - Yihao Wang
- Institute for Electrical Measurement Science and Fundamental Electrical Engineering and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig, 38106, Germany.
| | - Pauline J Kolbeck
- Soft Condensed Matter and Biophysics, Department of Physics and Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
- Department of Physics and Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Christoph Pauer
- Soft Condensed Matter and Biophysics, Department of Physics and Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Mohammad Suman Chowdhury
- Institute for Electrical Measurement Science and Fundamental Electrical Engineering and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig, 38106, Germany.
| | - Marco Cassani
- International Clinical Research Center, St. Anne's University Hospital, Brno, Czech Republic
| | - Frank Ludwig
- Institute for Electrical Measurement Science and Fundamental Electrical Engineering and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig, 38106, Germany.
| | - Thilo Viereck
- Institute for Electrical Measurement Science and Fundamental Electrical Engineering and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig, 38106, Germany.
| | - Florian Selbach
- Department of Chemistry and Center for NanoScience, LMU Munich, 81377 Munich, Germany
| | - Philip Tinnefeld
- Department of Chemistry and Center for NanoScience, LMU Munich, 81377 Munich, Germany
| | - Meinhard Schilling
- Institute for Electrical Measurement Science and Fundamental Electrical Engineering and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig, 38106, Germany.
| | - Tim Liedl
- Soft Condensed Matter and Biophysics, Department of Physics and Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Joe Tavacoli
- Soft Condensed Matter and Biophysics, Department of Physics and Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Jan Lipfert
- Soft Condensed Matter and Biophysics, Department of Physics and Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
- Department of Physics and Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
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Reinertsen RJE, Kewalramani S, Jiménez-Ángeles F, Weigand SJ, Bedzyk MJ, Olvera de la Cruz M. Reexpansion of charged nanoparticle assemblies in concentrated electrolytes. Proc Natl Acad Sci U S A 2024; 121:e2316537121. [PMID: 38289958 PMCID: PMC10861876 DOI: 10.1073/pnas.2316537121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 12/27/2023] [Indexed: 02/01/2024] Open
Abstract
Electrostatic forces in solutions are highly relevant to a variety of fields, ranging from electrochemical energy storage to biology. However, their manifestation in concentrated electrolytes is not fully understood, as exemplified by counterintuitive observations of colloidal stability and long-ranged repulsions in molten salts. Highly charged biomolecules, such as DNA, respond sensitively to ions in dilute solutions. Here, we use non-base-pairing DNA-coated nanoparticles (DNA-NP) to analyze electrostatic interactions in concentrated salt solutions. Despite their negative charge, these conjugates form colloidal crystals in solutions of sufficient divalent cation concentration. We utilize small-angle X-ray scattering (SAXS) to study such DNA-NP assemblies across the full accessible concentration ranges of aqueous CaCl2, MgCl2, and SrCl2 solutions. SAXS shows that the crystallinity and phases of the assembled structures vary with cation type. For all tested salts, the aggregates contract with added ions at low salinities and then begin expanding above a cation-dependent threshold salt concentration. Wide-angle X-ray scattering (WAXS) reveals enhanced positional correlations between ions in the solution at high salt concentrations. Complementary molecular dynamics simulations show that these ion-ion interactions reduce the favorability of dense ion configurations within the DNA brushes below that of the bulk solution. Measurements in solutions with lowered permittivity demonstrate a simultaneous increase in ion coupling and decrease in the concentration at which aggregate expansion begins, thus confirming the connection between these phenomena. Our work demonstrates that interactions between charged objects continue to evolve considerably into the high-concentration regime, where classical theories project electrostatics to be of negligible consequence.
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Affiliation(s)
- Roger J. E. Reinertsen
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL60208
| | - Sumit Kewalramani
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL60208
| | - Felipe Jiménez-Ángeles
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL60208
| | - Steven J. Weigand
- DuPont-Northwestern-Dow Collaborative Access Team, Northwestern University Synchrotron Research Center, Advanced Photon Source, Argonne, IL60439
| | - Michael J. Bedzyk
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL60208
- Department of Physics and Astronomy, Northwestern University, Evanston, IL60208
| | - Monica Olvera de la Cruz
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL60208
- Department of Physics and Astronomy, Northwestern University, Evanston, IL60208
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL60208
- Department of Chemistry, Northwestern University, Evanston, IL60208
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Mao R, Minevich B, McKeen D, Chen Q, Lu F, Gang O, Mittal J. Regulating phase behavior of nanoparticle assemblies through engineering of DNA-mediated isotropic interactions. Proc Natl Acad Sci U S A 2023; 120:e2302037120. [PMID: 38109548 PMCID: PMC10756293 DOI: 10.1073/pnas.2302037120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 11/14/2023] [Indexed: 12/20/2023] Open
Abstract
Self-assembly of isotropically interacting particles into desired crystal structures could allow for creating designed functional materials via simple synthetic means. However, the ability to use isotropic particles to assemble different crystal types remains challenging, especially for generating low-coordinated crystal structures. Here, we demonstrate that isotropic pairwise interparticle interactions can be rationally tuned through the design of DNA shells in a range that allows transition from common, high-coordinated FCC-CuAu and BCC-CsCl lattices, to more exotic symmetries for spherical particles such as the SC-NaCl lattice and to low-coordinated crystal structures (i.e., cubic diamond, open honeycomb). The combination of computational and experimental approaches reveals such a design strategy using DNA-functionalized nanoparticles and successfully demonstrates the realization of BCC-CsCl, SC-NaCl, and a weakly ordered cubic diamond phase. The study reveals the phase behavior of isotropic nanoparticles for DNA-shell tunable interaction, which, due to the ease of synthesis is promising for the practical realization of non-close-packed lattices.
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Affiliation(s)
- Runfang Mao
- Department of Chemical Engineering and Materials Science, University of Minnesota–Twin Cities, Minneapolis, MN55455
| | - Brian Minevich
- Department of Chemical Engineering, Columbia University, New York, NY10027
| | - Daniel McKeen
- Department of Chemical Engineering, Columbia University, New York, NY10027
| | - Qizan Chen
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX77843
| | - Fang Lu
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY11973
| | - Oleg Gang
- Department of Chemical Engineering, Columbia University, New York, NY10027
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY11973
- Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY10027
| | - Jeetain Mittal
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX77843
- Department of Chemistry, Texas A&M University, College Station, TX77843
- Interdisciplinary Graduate Program in Genetics and Genomics, Texas A&M University, College Station, TX77843
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