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Title: High-Resolution Laser-Induced Graphene. Flexible Electronics beyond the Visible Limit

Abstract

Laser-induced graphene (LIG) is a multifunctional graphene foam that is commonly direct-written with an infrared laser into a carbon-based precursor material. Here, a visible 405 nm laser is used to directly convert polyimide into LIG. This enabled the formation of LIG with a spatial resolution of ~12 μm and a thickness of <5 μm. The spatial resolution enabled by the relatively smaller focused spot size of the 405 nm laser represents a >60% reduction in LIG feature sizes reported in prior publications. This process occurs in situ in an SEM chamber, thus allowing direct observation of LIG formation. The reduced size of the LIG features enables the direct-write formation of flexible electronics that are not visible to the unaided eye. A humidity sensor is demonstrated which could detect human breath with a response time of 250 ms. With the growing interest in LIG for flexible electronics and sensors, finer features can greatly expand its utility.

Authors:
 [1];  [2]; ORCiD logo [3];  [2]; ORCiD logo [4]; ORCiD logo [3];  [1]
  1. Rice Univ., Houston, TX (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1619036
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 12; Journal Issue: 9; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Laser-induced graphene; high resolution; flexible sensor; visible laser

Citation Formats

Stanford, Michael, Zhang, Cheng, Fowlkes, Jason Davidson, Hoffmann, Anna, Ivanov, Ilia N., Rack, Philip D., and Tour, James. High-Resolution Laser-Induced Graphene. Flexible Electronics beyond the Visible Limit. United States: N. p., 2020. Web. doi:10.1021/acsami.0c01377.
Stanford, Michael, Zhang, Cheng, Fowlkes, Jason Davidson, Hoffmann, Anna, Ivanov, Ilia N., Rack, Philip D., & Tour, James. High-Resolution Laser-Induced Graphene. Flexible Electronics beyond the Visible Limit. United States. https://doi.org/10.1021/acsami.0c01377
Stanford, Michael, Zhang, Cheng, Fowlkes, Jason Davidson, Hoffmann, Anna, Ivanov, Ilia N., Rack, Philip D., and Tour, James. Mon . "High-Resolution Laser-Induced Graphene. Flexible Electronics beyond the Visible Limit". United States. https://doi.org/10.1021/acsami.0c01377. https://www.osti.gov/servlets/purl/1619036.
@article{osti_1619036,
title = {High-Resolution Laser-Induced Graphene. Flexible Electronics beyond the Visible Limit},
author = {Stanford, Michael and Zhang, Cheng and Fowlkes, Jason Davidson and Hoffmann, Anna and Ivanov, Ilia N. and Rack, Philip D. and Tour, James},
abstractNote = {Laser-induced graphene (LIG) is a multifunctional graphene foam that is commonly direct-written with an infrared laser into a carbon-based precursor material. Here, a visible 405 nm laser is used to directly convert polyimide into LIG. This enabled the formation of LIG with a spatial resolution of ~12 μm and a thickness of <5 μm. The spatial resolution enabled by the relatively smaller focused spot size of the 405 nm laser represents a >60% reduction in LIG feature sizes reported in prior publications. This process occurs in situ in an SEM chamber, thus allowing direct observation of LIG formation. The reduced size of the LIG features enables the direct-write formation of flexible electronics that are not visible to the unaided eye. A humidity sensor is demonstrated which could detect human breath with a response time of 250 ms. With the growing interest in LIG for flexible electronics and sensors, finer features can greatly expand its utility.},
doi = {10.1021/acsami.0c01377},
journal = {ACS Applied Materials and Interfaces},
number = 9,
volume = 12,
place = {United States},
year = {Mon Feb 10 00:00:00 EST 2020},
month = {Mon Feb 10 00:00:00 EST 2020}
}

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