Abstract
This paper presents a versatile and precise graphene patterning technique using the combined process of masking and inkjet printing. A graphene-based structure is fabricated by first defining the structural pattern and position using a masking mold, which can be either electroplated copper or deep reactive ion etching (DRIE) silicon shadow mask, followed by inkjet deposition of graphene ink and lift-off. The hybrid technique can realize high-fidelity, high-resolution graphene-based microstructures including free-standing and cantilever beams, four-point resistive measurement structures, and piezoresistive sensing elements with a minimum line width of ∼ 20μm. Moreover, this method can facilitate the micropatterning of graphene oxide (GO) and reduced graphene oxide (rGO) on substrates such as polydimethylsiloxane (PDMS) and SiO2/Si for selective cell culturing applications. Owing to the characteristics of low chemical usage, low process temperature and complexity, and high flexibility and fault tolerance of inkjet printing, this technique demonstrates compelling potential for a variety of biomedical applications.
Original language | English (US) |
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Article number | 9078740 |
Pages (from-to) | 79338-79346 |
Number of pages | 9 |
Journal | IEEE Access |
Volume | 8 |
DOIs | |
State | Published - 2020 |
Funding
This work was supported by the Novel Bioengineering and Technological Approaches to Solve Two Major Health Problems in Taiwan Sponsored by the Taiwan Ministry of Science and Technology Academic Excellence Program under Grant MOST 108-2633-B-009-001, Grant MOST 109-2639-E-009-001, Grant MOST 108-2321-B-009-007-MY2, and Grant 108-2221-E-009-003-MY2. The work of Ethan B. Secor and Mark C. Hersam was supported by the Air Force Research Laboratory under Agreement FA8650-15-2-5518.
Keywords
- Microelectromechanical systems
- inkjet printing
- microstructure
- tactile sensors
ASJC Scopus subject areas
- General Computer Science
- General Materials Science
- General Engineering