Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 105, Issue 32, Pages 11066-11070Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0801994105
Keywords
nanomaterials; printable electronics; devices; transistors; imager
Categories
Funding
- Defense Advanced Research Projects Agency/Microsystems Technology Office
- Intel
- Materials Structures and Device Focus Center
- Lawrence Berkeley National Laboratory
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We report large-scale integration of nanowires for heterogeneous, multifunctional circuitry that utilizes both the sensory and electronic functionalities of single crystalline nanomaterials. Highly ordered and parallel arrays of optically active CdSe nanowires and high-mobility Ge/Si nanowires are deterministically positioned on substrates, and configured as photodiodes and transistors, respectively. The nanowire sensors and electronic devices are then interfaced to enable an all-nanowire circuitry with on-chip integration, capable of detecting and amplifying an optical signal with high sensitivity and precision. Notably, the process is highly reproducible and scalable with a yield of approximate to 80% functional circuits, therefore, enabling the fabrication of large arrays (i.e., 13 x 20) of nanowire photosensor circuitry with image-sensing functionality. The ability to interface nanowire sensors with integrated electronics on large scales and with high uniformity presents an important advance toward the integration of nanomaterials for sensor applications.
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