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Qian H, Moreira G, Vanegas D, Tang Y, Pola C, Gomes C, McLamore E, Bliznyuk N. Improving high throughput manufacture of laser-inscribed graphene electrodes via hierarchical clustering. Sci Rep 2024; 14:7980. [PMID: 38575717 PMCID: PMC10995179 DOI: 10.1038/s41598-024-57932-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 03/22/2024] [Indexed: 04/06/2024] Open
Abstract
Laser-inscribed graphene (LIG), initially developed for graphene supercapacitors, has found widespread use in sensor research and development, particularly as a platform for low-cost electrochemical sensing. However, batch-to-batch variation in LIG fabrication introduces uncertainty that cannot be adequately tracked during manufacturing process, limiting scalability. Therefore, there is an urgent need for robust quality control (QC) methodologies to identify and select similar and functional LIG electrodes for sensor fabrication. For the first time, we have developed a statistical workflow and an open-source hierarchical clustering tool for QC analysis in LIG electrode fabrication. The QC process was challenged with multi-operator cyclic voltammetry (CV) data for bare and metalized LIG. As a proof of concept, we employed the developed QC process for laboratory-scale manufacturing of LIG-based biosensors. The study demonstrates that our QC process can rapidly identify similar LIG electrodes from large batches (n ≥ 36) of electrodes, leading to a reduction in biosensor measurement variation by approximately 13% compared to the control group without QC. The statistical workflow and open-source code presented here provide a versatile toolkit for clustering analysis, opening a pathway toward scalable manufacturing of LIG electrodes in sensing. In addition, we establish a data repository for further study of LIG variation.
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Affiliation(s)
- Hanyu Qian
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, 32611, USA
| | - Geisianny Moreira
- Department of Agricultural Sciences, Clemson University, Clemson, SC, 29634, USA
| | - Diana Vanegas
- Environmental Engineering and Earth Sciences Department of Engineering, Clemson University, Clemson, SC, 29634, USA
| | - Yifan Tang
- Department of Plant and Environmental Science, Clemson University, Clemson, SC, 29634, USA
| | - Cicero Pola
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Carmen Gomes
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Eric McLamore
- Department of Agricultural Sciences, Clemson University, Clemson, SC, 29634, USA.
- Environmental Engineering and Earth Sciences Department of Engineering, Clemson University, Clemson, SC, 29634, USA.
| | - Nikolay Bliznyuk
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, 32611, USA.
- Departments of Statistics, Biostatistics and Electrical and Computer Engineering, University of Florida, Gainesville, FL, 32611, USA.
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Van Volkenburg T, Ayoub D, Alemán Reyes A, Xia Z, Hamilton L. Practical Considerations for Laser-Induced Graphene Pressure Sensors Used in Marine Applications. SENSORS (BASEL, SWITZERLAND) 2023; 23:9044. [PMID: 38005430 PMCID: PMC10674168 DOI: 10.3390/s23229044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/02/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023]
Abstract
Small, low-power, and inexpensive marine depth sensors are of interest for a myriad of applications from maritime security to environmental monitoring. Recently, laser-induced graphene (LIG) piezoresistive pressure sensors have been proposed given their rapid fabrication and large dynamic range. In this work, the practicality of LIG integration into fieldable deep ocean (1 km) depth sensors in bulk is explored. Initially, a design of experiments (DOEs) approach evaluated laser engraver fabrication parameters such as line length, line width, laser speed, and laser power on resultant resistances of LIG traces. Next, uniaxial compression and thermal testing at relevant ocean pressures up to 10.3 MPa and temperatures between 0 and 25 °C evaluated the piezoresistive response of replicate sensors and determined the individual characterization of each, which is necessary. Additionally, bare LIG sensors showed larger resistance changes with temperature (ΔR ≈ 30 kΩ) than pressure (ΔR ≈ 1-15 kΩ), indicating that conformal coatings are required to both thermally insulate and electrically isolate traces from surrounding seawater. Sensors encapsulated with two dip-coated layers of 5 wt% polydimethylsiloxane (PDMS) silicone and submerged in water baths from 0 to 25 °C showed significant thermal dampening (ΔR ≈ 0.3 kΩ), indicating a path forward for the continued development of LIG/PDMS composite structures. This work presents both the promises and limitations of LIG piezoresistive depth sensors and recommends further research to validate this platform for global deployment.
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Affiliation(s)
- Tessa Van Volkenburg
- Research and Exploratory Development Department, Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA; (T.V.V.); (D.A.); (Z.X.)
| | - Daniel Ayoub
- Research and Exploratory Development Department, Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA; (T.V.V.); (D.A.); (Z.X.)
| | - Andrea Alemán Reyes
- Department of Chemical Engineering, University of Puerto Rico at Mayaguez, Mayaguez 00681, Puerto Rico;
| | - Zhiyong Xia
- Research and Exploratory Development Department, Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA; (T.V.V.); (D.A.); (Z.X.)
| | - Leslie Hamilton
- Research and Exploratory Development Department, Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA; (T.V.V.); (D.A.); (Z.X.)
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Powell CD, Pisharody L, Jopp J, Sharon-Gojman R, Tesfahunegn BA, Arnusch CJ. Laser-Induced Graphene Capacitive Killing of Bacteria. ACS APPLIED BIO MATERIALS 2023; 6:883-890. [PMID: 36692432 DOI: 10.1021/acsabm.2c01034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Laser-induced graphene (LIG) is a method of generating a foam-like conformal carbon layer of porous graphene on many types of carbon-based surfaces. This electrically conductive material has been shown to be useful in many applications including environmental technology and includes low fouling and antimicrobial surfaces and can address persistent environmental challenges spawned by bacterial and viral contaminates. Here, we show that a single film of LIG stores charge when an electrical current is applied and dissipates charge when the current is stopped, which results in electricidal surface antibacterial potency. The amount of accumulated and dissipated charge on a single strip of LIG was quantified with an electrometer by generating LIG on both sides of a nonconducting polyimide film, which showed up to 65 pC of charge when the distance between the surfaces was 94 μm corresponding to an areal capacitance of 1.63 pF/cm2. We further corroborate the stored charge decay of a single LIG strip with bacteria death via direct electrical contact. Antimicrobial rates decreased with the same monotonic pattern as the loss of charge from the LIG film (i.e., AR ∼ 97% 0 s after voltage source disconnection vs AR ∼ 21% 90 s after disconnection) showing bacterial death as a function of delayed LIG exposure time after applied voltage disconnection. In terms of energy efficiency, this translates to an increased bacteria potency of ∼170% for the equivalent energy costs as that previously estimated. Finally, we present a mechanistic explanation for the capacitive behavior and the electricidal effects for a single plate of LIG.
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Affiliation(s)
- Camilah D Powell
- Department of Desalination and Water Treatment, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Midreshet Ben Gurion8499000, Israel
| | - Lakshmi Pisharody
- Department of Desalination and Water Treatment, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Midreshet Ben Gurion8499000, Israel
| | - Jürgen Jopp
- Department of Chemistry and the Ilse Katz Institute for Nanotechnology, Ben Gurion University of the Negev, Beersheva84105, Israel
| | - Revital Sharon-Gojman
- Department of Desalination and Water Treatment, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Midreshet Ben Gurion8499000, Israel
| | - Brhane A Tesfahunegn
- Department of Desalination and Water Treatment, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Midreshet Ben Gurion8499000, Israel
| | - Christopher J Arnusch
- Department of Desalination and Water Treatment, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Midreshet Ben Gurion8499000, Israel
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