Cited by 105DNA and Biological ComputingAdvanced biosensing and bioanalysis techniquesNanoparticle-Based Drug Delivery

Combining Data Longevity with High Storage Capacity—Layer‐by‐Layer DNA Encapsulated in Magnetic Nanoparticles

Chen, Weida D., Kohll, A. Xavier, Nguyen, Bichlien H., Koch, Julian, Heckel, Reinhard, Stark, Wendelin J., Ceze, Luis, Strauss, Karin +1 more·2019·Advanced Functional Materials

Abstract

In this paper the practical density of long‐term DNA storage is increased. Specifically, the DNA weight loading of silica sphere DNA storage is increased to 3.4 wt%, a ten‐fold increase compared to the previous state‐of‐the‐art. By applying a Layer‐by‐Layer (LbL) design with alternating layers of DNA and a polycationic molecule, namely polyethyleneimine (PEI), another dimension to DNA surface binding onto magnetic nanoparticles is added. A protective silica layer is grown on top of the multilayered nanoparticles to shield the DNA from external sources of damage. Accelerated aging experiments of the nanoparticles and the subsequent quantification of DNA stability via qPCR show a significantly lower degradation rate compared to unprotected DNA. The novel material is compared to previous DNA storage technologies, outperforming those in DNA storage density as well as stability. Finally, the storage of an 83 kB digital file in DNA through a successful readout of a 4991 oligonucleotide pool is demonstrated from particle encapsulation, through accelerated aging, to sequencing.

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Crossref · 10.1002/adfm.201901672

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  • Because encapsulation of the DNA file sequence relies only on electrostatic interactions between positively-charged silica and the phosphate backbone of DNA, the approach can equally encapsulate any molecular weight of DNA molecule applicable to MB and larger file sizes, and is compatible with alternative DNA file compositions such as 100-200-mer oligonucleotides or multiple layers of encapsulated

    “Because encapsulation of the DNA file sequence relies only on electrostatic interactions between positively-charged silica and the phosphate backbone of DNA, our approach can equally encapsulate any molecular weight of DNA molecule applicable to MB and larger file sizes, as demonstrated previously23, and is compatible with alternative DNA file compositions such as 100–200-mer oligonucleotides that”
  • The adaptation was accomplished by a more dilute condensation reaction as opposed to previously reported synthesis procedures.

    “This was accomplished by a more dilute condensation reaction as opposed to previously reported synthesis procedures. [22,22,26]”
  • Encapsulation of DNA in silica nanoparticles is one of the most effective methods for DNA preservation and was employed in this work.

    “One of the most effective methods is the encapsulation of DNA in silica nanoparticles, which has been versatilely used in the recent past and was therefore also employed in this work.[10,21,22]”
  • Particles comprising higher DNA concentrations than those used here would aid to further increase data density.

    “Also, particles comprising higher DNA concentrations than the ones used here, would aid to further increase data density.[22]”
  • A potential data load of nearly 280 TB per spot is already feasible today, considering particles with optimized DNA loading and a coding scheme with increased net information density.

    “Considering the usage of particles with a more optimized DNA loading and a coding scheme featuring increased net information density, [5,22] a potential data load of nearly 280 TB per spot is already feasible today.”

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Authors
Chen, W. D., Kohll, A. X., Nguyen, B. H., Koch, J., Heckel, R., Stark, W. J., Ceze, L., Strauss, K., & Grass, R. N.
Affiliations
  • ETH Zurich (CH)
  • Microsoft (United States) (US)
  • Rice University (US)
  • Paul G. Allen School of Computer Science & Engineering University of Washington 185 E Stevens Way NE Seattle WA 98195 USA
Corresponding author
Grass, Robert N.
Venue
Advanced Functional Materials
Publisher
Wiley
Published
2019-05-10
Volume
29
Issue
28
ISSN
  • 1616-301X (ISSN-L)
  • 1616-3028
OpenAlex
W2944518389
Cited by
104
References
40
Citations by year
2026: 11 · 2025: 17 · 2024: 11 · 2023: 17 · 2022: 18 · 2021: 19 · 2020: 10 · 2019: 1
FWCI
3.97
Type
journal article
Language
en
Open access
closed
Locations
  • Advanced Functional Materials (publishedVersion)
  • mediaTUM (Technical University of Munich) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Biological Computing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Advanced biosensing and bioanalysis techniques
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
Keywords
DNA data storage, magnetic nanoparticles, layer-by-layer assembly, polyethyleneimine, silica coating, DNA encapsulation, DNA stability, accelerated aging, storage density

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