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http://hdl.handle.net/10397/94228
Title: | Thermally stable, adhesively strong graphene/polyimide films for inkjet printing ultrasound sensors | Authors: | Zhou, P Liao, Y Yang, X Su, Y Yang, J Xu, L Wang, K Zeng, Z Zhou, LM Zhang, Z Su, Z |
Issue Date: | 30-Oct-2021 | Source: | Carbon, 30 Oct. 2021, v. 184, p. 64-71 | Abstract: | Targeting for flexible, broadband ultrasound sensors, a new breed of nanographene platelet (NGP)/polyimide (PI) film is inkjet printed with morphologically optimized NGP/poly (amic acid) hybrid-based nanocomposite ink. The ink is produced with high-shear liquid phase exfoliation from inexpensive bulk graphite, manifesting good printability and high graphene concentration as high as 13.1 mg mL−1. Featuring an ultra-thin thickness (∼1 μm only), the inkjet-printed NGP/PI film sensor is demonstrated to possess excellent thermal stability and high adhesive strength reaching the American Society for Testing and Materials 5B level. The highly uniform and consolidated NGP/PI nanostructure in the sensor enables the formation of π-π interaction between NGPs and PI polymer matrix, and the quantum tunneling effect is triggered among NGPs when ultrasound traverses the sensor. This sensing mechanism endows the NGP/PI sensor with good sensitivity, fidelity and accuracy, showing comparable performance as prevailing commercial ultrasound sensors such as piezoelectric sensors. The film sensor has a proven gauge factor as high as 739, when sensing ultrasound at 175 kHz, and an ultrabroad responsive spectrum up to 1.6 MHz. | Keywords: | Graphene High frequency ultrasound Inkjet-printed sensor Liquid exfoliation Polyimide |
Publisher: | Pergamon Press | Journal: | Carbon | ISSN: | 0008-6223 | EISSN: | 1873-3891 | DOI: | 10.1016/j.carbon.2021.08.007 | Rights: | © 2021 Elsevier Ltd. All rights reserved. © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Zhou, P., et al. (2021). "Thermally stable, adhesively strong graphene/polyimide films for inkjet printing ultrasound sensors." Carbon 184: 64-71 is available at https://dx.doi.org/10.1016/j.carbon.2021.08.007. |
Appears in Collections: | Journal/Magazine Article |
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Zhou_Thermally_Stable_Adhesively.pdf | Pre-Published version | 1.91 MB | Adobe PDF | View/Open |
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