Advanced One- and Two-Dimensional Mesh Designs for Injectable Electronics

Robert D. Viveros, Tao Zhou, Guosong Hong, Tian Ming Fu, Hao Yu Greg Lin, Charles M. Lieber

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The unique structure and mechanical properties of syringe-injectable mesh electronics have enabled seamless tissue integration and stable chronic recording of the activities of the same neurons on a year scale. Here, we report studies of a series of structural and mechanical mesh electronics design variations that allow injection using needles at least 4-fold smaller than those previously reported to minimize the footprint during injection of the electronics in soft matter and tissue. Characterization of new ultraflexible two-dimensional (2D) and one-dimensional (1D) probes has demonstrated reproducible injection of the newly developed mesh electronics designs via needles as small as 100 μm in inner diameter (ID) with reduced injection volumes. In vitro hydrogel and in vivo mouse brain studies have shown that ultraflexible 2D and 1D probes maintain their structural integrity and conformation post-injection after being transferred through the reduced diameter needles. In addition, analysis of the variation of the post-injection mesh cross sections suggests a smaller degree of tissue deformation and relaxation with decreasing needle diameters. The capability to implement rational design for mesh electronic probes that can be delivered via much smaller diameter needles should open up new opportunities for integration of electronics with tissue and soft matter in fundamental and translational studies.

Original languageEnglish (US)
Pages (from-to)4180-4187
Number of pages8
JournalNano Letters
Volume19
Issue number6
DOIs
StatePublished - Jun 12 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Keywords

  • minimal footprint
  • one-dimensional probe
  • soft material integration
  • Tissue-like electronics
  • ultraflexible probe
  • ultrasmall needle

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