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Kim S, Kim DY. Enhanced Sensitivity of a Resistive Pressure Sensor Based on a PEDOT:PSS Thin Film on PDMS with a Random-Height Micropyramid Structure. MICROMACHINES 2024; 15:1110. [PMID: 39337770 PMCID: PMC11434580 DOI: 10.3390/mi15091110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2024] [Revised: 08/27/2024] [Accepted: 08/28/2024] [Indexed: 09/30/2024]
Abstract
The use of flexible pressure sensors has become increasingly widespread in a variety of applications, including wearable electronics and electronic skin. These sensors need to exhibit high sensitivity, wide detection limits, a fast response time, a linear response, and mechanical stability. In this study, we demonstrate a resistive pressure sensor based on randomly arranged micropyramid polydimethylsiloxane (PDMS) with a conductive poly(3,4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT:PSS) thin film with a sensitivity of 391 kPa-1, a response time of 52.91 ms, a recovery time of 4.38 ms, and a limit of detection (LOD) of 0.35 kPa. Electrodes are then connected to a pair of the proposed resistive pressure sensors that face each other to fabricate a pressure sensing device. We examine various characteristics of the fabricated device, including the changes observed when applying loads ranging from 0 to 2.58 kPa. The proposed sensor exhibits high sensitivity and a rapid response time.
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Affiliation(s)
- Sungyong Kim
- Department of Electrical and Computer Engineering, College of Engineering, Inha University, Incheon 22212, Korea
| | - Dae Yu Kim
- Department of Electrical and Computer Engineering, College of Engineering, Inha University, Incheon 22212, Korea
- Center for Sensor Systems, Inha University, Incheon 22212, Republic of Korea
- Inha Research Institute for Aerospace Medicine, Inha University, Incheon 22212, Republic of Korea
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Pengsomjit U, Alabdo F, Karuwan C, Kraiya C, Alahmad W, Ozkan SA. Innovative Graphene-Based Nanocomposites for Improvement of Electrochemical Sensors: Synthesis, Characterization, and Applications. Crit Rev Anal Chem 2024:1-19. [PMID: 38656227 DOI: 10.1080/10408347.2024.2343854] [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: 04/26/2024]
Abstract
Graphene, renowned for its exceptional physicochemical attributes, has emerged as a favored substrate for integrating a wide array of inorganic and organic materials in scientific endeavors and innovations. Electrochemical graphene-based nanocomposite sensors have been developed by incorporating diverse nanoparticles into graphene, effectively immobilized onto electrodes through various techniques. These graphene-based nanocomposite sensors have effectively detected and quantified various electroactive species in samples. This review delves into using graphene nanocomposites to fabricate electrochemical sensors, leveraging the exceptional electrical, mechanical, and thermal properties inherent to graphene derivatives. These nanocomposites showcase electrocatalytic activity, substantial surface area, superior electrical conductivity, adsorption capabilities, and notable porosity, which are highly advantageous for sensing applications. A myriad of characterization techniques, including Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET surface area analysis, and X-ray diffraction (XRD), have proven effective in exploring the properties of graphene nanocomposites and validating the adjustable formation of these nanomaterials with graphene. The applicability of these sensors across various matrices, encompassing environmental, food, and biological domains, has been evaluated through electrochemical measurements, such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). This review provides a comprehensive overview of synthesis methods, characterization techniques, and sensor applications pertinent to graphene-based nanocomposites. Furthermore, it deliberates on the challenges and future prospects within this burgeoning field.
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Affiliation(s)
- Untika Pengsomjit
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Department of Chemistry, Faculty of Science, Electrochemistry and Optical Spectroscopy Center of Excellence, Chulalongkorn University, Bangkok, Thailand
| | - Fatima Alabdo
- Department of Chemistry and Physics, Faculty of Science, Idlib University, Idlib, Syria
| | - Chanpen Karuwan
- Graphene Research Team (GRP), National Nanotechnology Center (NANOTEC), National Science and Technology Development (NSTDA), Pathum Thani, Thailand
| | - Charoenkwan Kraiya
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Department of Chemistry, Faculty of Science, Electrochemistry and Optical Spectroscopy Center of Excellence, Chulalongkorn University, Bangkok, Thailand
| | - Waleed Alahmad
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Sibel A Ozkan
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkiye
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Villalobos E, Marco JF, Yáñez C. Reduced Graphene Oxide as a Platform for the Immobilization of Amino-Cyclodextrins. MICROMACHINES 2023; 14:746. [PMID: 37420979 PMCID: PMC10143922 DOI: 10.3390/mi14040746] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/16/2023] [Accepted: 03/24/2023] [Indexed: 07/09/2023]
Abstract
In the present work, we reported on a method to combine amino β-cyclodextrins (CD1) with reduced graphene oxide (obtained by the electrochemical reduction of graphene oxide, erGO) to produce a glassy carbon electrode (GCE) modified with both CD1 and erGO (CD1-erGO/GCE). This procedure avoids the use of organic solvents such as hydrazine or long reaction times and high temperatures. The material combining both CD1 and erGO (CD1-erGO/GCE) was characterized by SEM, ATR-FTIR, Raman, XPS, and electrochemical techniques. As proof-of-concept, the determination of the pesticide carbendazim was carried out. The spectroscopic measurements, especially XPS, proved that CD1 was covalently attached to the surface of the erGO/GCE electrode. The attachment of cyclodextrin at the reduced graphene oxide produced an increase in the electrochemical behavior of the electrode. The cyclodextrin-functionalized reduced graphene oxide, CD1-erGO/GCE, showed a larger sensitivity (1.01 μA/μM) and a lower limit of detection for carbendazim (LOD = 0.50 μM) compared with the non-functionalized material, erGO/GCE, (sensitivity = 0.63 μA/μM and LOD = 4.32 μM, respectively). Overall, the results of the present work show that this simple method is suitable to attach cyclodextrins to graphene oxide, maintaining their inclusion abilities.
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Affiliation(s)
- Elias Villalobos
- Centro de Investigación de Procesos Redox, CIPRex, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Sergio Livingstone 1007, Independencia, Santiago P.O. Box 233, Chile
| | - José F. Marco
- Instituto de Química Física “Rocasolano”, CSIC, C/Serrano, 119, 28006 Madrid, Spain;
| | - Claudia Yáñez
- Centro de Investigación de Procesos Redox, CIPRex, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Sergio Livingstone 1007, Independencia, Santiago P.O. Box 233, Chile
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Sergio Livingstone 1007, Independencia, Santiago P.O. Box 233, Chile
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Safina LR, Rozhnova EA. MOLECULAR DYNAMICS SIMULATION OF THE DEFORMATION BEHAVIOR OF THE GRAPHENE/Al COMPOSITE. J STRUCT CHEM+ 2023. [DOI: 10.1134/s0022476623020087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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Choi J, Park SG, Choi YJ, Baek SM, Kim HJ, Kim Y, Im KS, An SJ. Viscosity-Controllable Graphene Oxide Colloids Using Electrophoretically Deposited Graphene Oxide Sheets. MICROMACHINES 2022; 13:2157. [PMID: 36557456 PMCID: PMC9784829 DOI: 10.3390/mi13122157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Graphene oxide (GO) is one of the interesting ink materials owing to its fascinating properties, such as high dissolubility in water and high controllable electric properties. For versatile printing application, the viscosity of GO colloids should be controlled in order to meet the specific process requirements. Here, we report on the relatively rapid fabrication of viscosity-increased GO (VIGO) colloids mixed with electrophoretically deposited GO sheets (EPD-GO). As the GO colloid concentration, applied voltage, and deposition time increase, the viscosity of the GO colloids becomes high. The reason for the improved viscosity of GO colloids is because EPD-GO has parallel stacked GO sheets. The GO and VIGO colloids are compared and characterized using various chemical and structural analyzers. Consequently, our simple and fast method for the fabrication of GO colloids with enhanced viscosity can be used for producing inks for flexible and printed electronics.
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Affiliation(s)
- Jinseok Choi
- Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
| | - Seong-Gyu Park
- Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
| | - Yeo-Jin Choi
- Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
| | - Seung-Mun Baek
- Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
| | - Han-Jung Kim
- Nano Electronic Materials and Components Research Center, Gumi Electronics and Information Technology Research Institute, Gumi 39171, Republic of Korea
| | - Yoonkap Kim
- Nano Electronic Materials and Components Research Center, Gumi Electronics and Information Technology Research Institute, Gumi 39171, Republic of Korea
| | - Ki-Sik Im
- Department of Green Semiconductor System, Daegu Campus, Korea Polytechnics, Daegu 41765, Republic of Korea
| | - Sung-Jin An
- Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
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Tarekegn EN, Seyedi M, Luzinov I, Harrell WR. Poly(3-hexylthiophene)-Based Organic Thin-Film Transistors with Virgin Graphene Oxide as an Interfacial Layer. Polymers (Basel) 2022; 14:polym14235061. [PMID: 36501455 PMCID: PMC9736656 DOI: 10.3390/polym14235061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/07/2022] [Accepted: 11/10/2022] [Indexed: 11/23/2022] Open
Abstract
We fabricated and characterized poly(3-hexylthiophene-2, 5-diyl) (P3HT)-based Organic thin-film transistors (OTFTs) containing an interfacial layer made from virgin Graphene Oxide (GO). Previously chemically modified GO and reduced GO (RGO) were used to modify OTFT interfaces. However, to our knowledge, there are no published reports where virgin GO was employed for this purpose. For the sake of comparison, OTFTs without modification were also manufactured. The structure of the devices was based on the Bottom Gate Bottom Contact (BGBC) OTFT. We show that the presence of the GO monolayer on the surface of the OTFT's SiO2 dielectric and Au electrode surface noticeably improves their performance. Namely, the drain current and the field-effect mobility of OTFTs are considerably increased by modifying the interfaces with the virgin GO deposition. It is suggested that the observed enhancement is connected to a decrease in the contact resistance of GO-covered Au electrodes and the particular structure of the P3HT layer on the dielectric surface. Namely, we found a specific morphology of the organic semiconductor P3HT layer, where larger interconnecting polymer grains are formed on the surface of the GO-modified SiO2. It is proposed that this specific morphology is formed due to the increased mobility of the P3HT segments near the solid boundary, which was confirmed via Differential Scanning Calorimetry measurements.
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Affiliation(s)
- Eyob N. Tarekegn
- Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA
| | - Mastooreh Seyedi
- Department of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USA
| | - Igor Luzinov
- Department of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USA
- Correspondence: (I.L.); (W.R.H.)
| | - William R. Harrell
- Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA
- Correspondence: (I.L.); (W.R.H.)
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Czechowski L, Kedziora S, Museyibov E, Schlienz M, Szatkowski P, Szatkowska M, Gralewski J. Influence of UV Ageing on Properties of Printed PLA Containing Graphene Nanopowder. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15228135. [PMID: 36431621 PMCID: PMC9699029 DOI: 10.3390/ma15228135] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 11/07/2022] [Accepted: 11/14/2022] [Indexed: 05/27/2023]
Abstract
The present paper analyses the properties of printed polylactic acid (PLA) samples with admixtures of graphene nanopowder (GNP) at wt. 1%, 2% and 4%. The pure polylactide and admixed polylactide printed samples were examined to determine their chemical-physical properties, stiffness, and strength parameters. The tests of tensile, dynamic mechanical analysis (DMA), difference thermogravimetric (TG), and differential scanning calorimetry (DSC) were executed before and after UV (ultraviolet) treatment. The first part of the paper shows the process of manufacturing granulates and filaments mixed with graphene. The second part of the paper concerns the results of the tests made on printed samples. The analysed samples were printed using a Prusa i3 MK3 printer. It transpired that the content of graphene at 1% improved the mechanical parameters of the printed composite by organising its structure. Increasing the amount of graphene caused the values of the measured parameters to drop. This research indicates how important it is to determine the optimal values of nanoadditives in biopolymers.
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Affiliation(s)
- Leszek Czechowski
- Department of Strength of Materials, Lodz University of Technology, 90-537 Lodz, Poland
- Faculty of Science, Technology and Medicine, Luxembourg University, L-1359 Luxembourg, Luxembourg
| | - Slawomir Kedziora
- Faculty of Science, Technology and Medicine, Luxembourg University, L-1359 Luxembourg, Luxembourg
| | - Elvin Museyibov
- Faculty of Science, Technology and Medicine, Luxembourg University, L-1359 Luxembourg, Luxembourg
| | - Markus Schlienz
- Faculty of Science, Technology and Medicine, Luxembourg University, L-1359 Luxembourg, Luxembourg
| | - Piotr Szatkowski
- Faculty of Materials Science and Ceramics, University of Science and Technology, 30-059 Krakow, Poland
| | - Martyna Szatkowska
- Faculty of Materials Science and Ceramics, University of Science and Technology, 30-059 Krakow, Poland
| | - Jacek Gralewski
- Institute of Marketing and Sustainable Development, Lodz University of Technology, 93-590 Lodz, Poland
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