Flexible Transient Optical Waveguides and Surface-Wave Biosensors Constructed from Monocrystalline Silicon

Wubin Bai, Hongjun Yang, Yinji Ma, Hao Chen, Jiho Shin, Yonghao Liu, Quansan Yang, Irawati Kandela, Zhonghe Liu, Seung Kyun Kang, Chen Wei, Chad R. Haney, Anlil Brikha, Xiaochen Ge, Xue Feng, Paul V. Braun, Yonggang Huang, Weidong Zhou*, John A. Rogers

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

Optical technologies offer important capabilities in both biological research and clinical care. Recent interest is in implantable devices that provide intimate optical coupling to biological tissues for a finite time period and then undergo full bioresorption into benign products, thereby serving as temporary implants for diagnosis and/or therapy. The results presented here establish a silicon-based, bioresorbable photonic platform that relies on thin filaments of monocrystalline silicon encapsulated by polymers as flexible, transient optical waveguides for accurate light delivery and sensing at targeted sites in biological systems. Comprehensive studies of the mechanical and optical properties associated with bending and unfurling the waveguides from wafer-scale sources of materials establish general guidelines in fabrication and design. Monitoring biochemical species such as glucose and tracking physiological parameters such as oxygen saturation using near-infrared spectroscopic methods demonstrate modes of utility in biomedicine. These concepts provide versatile capabilities in biomedical diagnosis, therapy, deep-tissue imaging, and surgery, and suggest a broad range of opportunities for silicon photonics in bioresorbable technologies.

Original languageEnglish (US)
Article number1801584
JournalAdvanced Materials
Volume30
Issue number32
DOIs
StatePublished - Aug 9 2018

Funding

W.B. and H.Y. contributed equally to this work. W.Z. acknowledges support from Army Research Office under Grant No. W911NF-15-1-0035. Y.M. and X.F. acknowledge the support from the National Basic Research Program of China (Grant No. 2015CB351900) and the National Natural Science Foundation of China (Grant Nos. 11402135 and 11320101001). Y.H. acknowledges the support from National Science Foundation (Grant Nos. 1400169, 1534120, and 1635443) and National Institutes of Health (Grant No. R01EB019337). This work utilized Northwestern University Micro/Nano Fabrication Facility (NUFAB), which was partially supported by Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205), the Materials Research Science and Engineering Center (NSF DMR-1121262), the State of Illinois, Northwestern University, and the Center for Bio-Integrated Electronics at the Simpson/Querrey Institute. The Center for Developmental Therapeutics was supported by Cancer Center Support Grant P30 CA060553 from the National Cancer Institute awarded to the Robert H. Lurie Comprehensive Cancer Center.

Keywords

  • flexible photonics
  • silicon nanomembrane
  • spectroscopy
  • transfer printing
  • transient photonics

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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