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Lee M, Yun S, Ho D, Earmme T, Marrocchi A, Vaccaro L, Kim C. Green solvent-processed complementary-like inverters based on ambipolar organic thin-film transistors. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.09.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Moon Y, Ha JW, Yoon M, Hwang DH, Lee J. Surface Polarization Doping in Diketopyrrolopyrrole-Based Conjugated Copolymers Using Cross-Linkable Terpolymer Dielectric Layers Containing Fluorinated Functional Units. ACS APPLIED MATERIALS & INTERFACES 2021; 13:54227-54236. [PMID: 34734703 DOI: 10.1021/acsami.1c15109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
It is essential to tune the electrical properties of inorganic semiconductors via a doping process in the fabrication of cutting-edge electronic devices; however, the doping in organic field-effect transistors (OFETs) is limited by the uncontrollable dopant diffusion and low doping efficiencies. This study proposes the use of a fluorinated functional group in a polymer dielectric layer as an effective p-type doping strategy for ambipolar diketopyrrolopyrrole (DPP)-based donor-acceptor (D-A)-type semiconducting copolymer films used in OFETs, without generating structural perturbations. To experimentally verify the surface polarization doping effect of the fluorinated group, two terpolymers─poly(pentafluorostyrene-co-3-azidopropyl-methacrylate-co-propargyl-methacrylate) (5F-SAPMA), wherein fluorinated units are included, and poly(phenyl-methacrylate-co-3-azidopropyl-methacrylate-co-propargyl-methacrylate) (PhAPMA), without fluorinated units─are designed and synthesized for use in OFETs. The synthesized 5F-SAPMA and PhAPMA films were cross-linked through the click reaction between the alkyne and azide units in the terpolymers at 150 °C to provide chemical, thermal, and mechanical stabilities and solvent resistance. The electrical characterization of the OFETs with the newly synthesized terpolymer dielectrics reveals that the surface polarization induced by the fluorinated groups of the 5F-SAPMA dielectrics leads to the generation of additional hole charges and helps minimize the broadening of the extended tail states in the vicinity of the valence band (highest occupied molecular orbital (HOMO) level). This not only enables a transition from the ambipolar to p-type dominant characteristics but also helps increase the hole mobility from 0.023 to 0.305 cm2/(V·s).
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Affiliation(s)
- Yina Moon
- Department of Graphic Arts Information Engineering, Pukyong National University, Busan 48513, Republic of Korea
| | - Jong-Woon Ha
- Department of Chemistry, and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Minho Yoon
- Department of Smart Green Technology Engineering, Pukyong National University, Busan 48513, Republic of Korea
| | - Do-Hoon Hwang
- Department of Chemistry, and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Jiyoul Lee
- Department of Graphic Arts Information Engineering, Pukyong National University, Busan 48513, Republic of Korea
- Department of Smart Green Technology Engineering, Pukyong National University, Busan 48513, Republic of Korea
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Cho BG, Joshi SR, Lee S, Kim SK, Park YB, Kim GH. Enhanced Mechanical and Antibacterial Properties of Nanocomposites Based on Poly(vinyl Alcohol) and Biopolymer-Derived Reduced Graphene Oxide. Polymers (Basel) 2021; 13:polym13040615. [PMID: 33670700 PMCID: PMC7923123 DOI: 10.3390/polym13040615] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 02/16/2021] [Accepted: 02/16/2021] [Indexed: 11/29/2022] Open
Abstract
Functionalized graphene–polymer nanocomposites have gained significant attention for their enhanced mechanical, thermal, and antibacterial properties, but the requirement of multi-step processes or hazardous reducing agents to functionalize graphene limits their current applications. Here, we present a single-step synthesis of thermally reduced graphene oxide (TrGO) based on shellac, which is a low-cost biopolymer that can be employed to produce poly(vinyl alcohol) (PVA)/TrGO nanocomposites (PVA–TrGO). The concentration of TrGO varied from 0.1 to 2.0 wt.%, and the critical concentration of homogeneous TrGO dispersion was observed to be 1.5 wt.%, below which strong interfacial molecular interactions between the TrGO and the PVA matrix resulted in improved thermal and mechanical properties. At 1.5 wt.% filler loading, the tensile strength and modulus of the PVA–TrGO nanocomposite were increased by 98.7% and 97.4%, respectively, while the storage modulus was increased by 69%. Furthermore, the nanocomposite was 96% more effective in preventing bacterial colonization relative to the neat PVA matrix. The present findings indicate that TrGO can be considered a promising material for potential applications in biomedical devices.
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Affiliation(s)
| | | | | | | | - Young-Bin Park
- Correspondence: (Y.-B.P.); (G.-H.K.); Tel.: +82-52-217-2314 (Y-B.P.); +82-52-217-2413 (G.-H.K.)
| | - Gun-Ho Kim
- Correspondence: (Y.-B.P.); (G.-H.K.); Tel.: +82-52-217-2314 (Y-B.P.); +82-52-217-2413 (G.-H.K.)
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Al-Qatatsheh A, Morsi Y, Zavabeti A, Zolfagharian A, Salim N, Z. Kouzani A, Mosadegh B, Gharaie S. Blood Pressure Sensors: Materials, Fabrication Methods, Performance Evaluations and Future Perspectives. SENSORS (BASEL, SWITZERLAND) 2020; 20:E4484. [PMID: 32796604 PMCID: PMC7474433 DOI: 10.3390/s20164484] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/31/2020] [Accepted: 08/04/2020] [Indexed: 12/14/2022]
Abstract
Advancements in materials science and fabrication techniques have contributed to the significant growing attention to a wide variety of sensors for digital healthcare. While the progress in this area is tremendously impressive, few wearable sensors with the capability of real-time blood pressure monitoring are approved for clinical use. One of the key obstacles in the further development of wearable sensors for medical applications is the lack of comprehensive technical evaluation of sensor materials against the expected clinical performance. Here, we present an extensive review and critical analysis of various materials applied in the design and fabrication of wearable sensors. In our unique transdisciplinary approach, we studied the fundamentals of blood pressure and examined its measuring modalities while focusing on their clinical use and sensing principles to identify material functionalities. Then, we carefully reviewed various categories of functional materials utilized in sensor building blocks allowing for comparative analysis of the performance of a wide range of materials throughout the sensor operational-life cycle. Not only this provides essential data to enhance the materials' properties and optimize their performance, but also, it highlights new perspectives and provides suggestions to develop the next generation pressure sensors for clinical use.
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Affiliation(s)
- Ahmed Al-Qatatsheh
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Yosry Morsi
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Ali Zavabeti
- Department of Chemical Engineering, The University of Melbourne, Parkville VIC 3010, Australia;
| | - Ali Zolfagharian
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
| | - Nisa Salim
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Abbas Z. Kouzani
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
| | - Bobak Mosadegh
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medicine, New York, NY 10065, USA;
| | - Saleh Gharaie
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
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Joshi SR, Sharma A, Kim GH, Jang J. Low cost synthesis of reduced graphene oxide using biopolymer for influenza virus sensor. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 108:110465. [DOI: 10.1016/j.msec.2019.110465] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 11/01/2019] [Accepted: 11/17/2019] [Indexed: 01/30/2023]
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Liu H, Jian R, Chen H, Tian X, Sun C, Zhu J, Yang Z, Sun J, Wang C. Application of Biodegradable and Biocompatible Nanocomposites in Electronics: Current Status and Future Directions. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E950. [PMID: 31261962 PMCID: PMC6669760 DOI: 10.3390/nano9070950] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 06/19/2019] [Accepted: 06/24/2019] [Indexed: 02/07/2023]
Abstract
With the continuous increase in the production of electronic devices, large amounts of electronic waste (E-waste) are routinely being discarded into the environment. This causes serious environmental and ecological problems because of the non-degradable polymers, released hazardous chemicals, and toxic heavy metals. The appearance of biodegradable polymers, which can be degraded or dissolved into the surrounding environment with no pollution, is promising for effectively relieving the environmental burden. Additionally, biodegradable polymers are usually biocompatible, which enables electronics to be used in implantable biomedical applications. However, for some specific application requirements, such as flexibility, electric conductivity, dielectric property, gas and water vapor barrier, most biodegradable polymers are inadequate. Recent research has focused on the preparation of nanocomposites by incorporating nanofillers into biopolymers, so as to endow them with functional characteristics, while simultaneously maintaining effective biodegradability and biocompatibility. As such, bionanocomposites have broad application prospects in electronic devices. In this paper, emergent biodegradable and biocompatible polymers used as insulators or (semi)conductors are first reviewed, followed by biodegradable and biocompatible nanocomposites applied in electronics as substrates, (semi)conductors and dielectrics, as well as electronic packaging, which is highlighted with specific examples. To finish, future directions of the biodegradable and biocompatible nanocomposites, as well as the challenges, that must be overcome are discussed.
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Affiliation(s)
- Haichao Liu
- Academic Division of Engineering, Qingdao University of Science & Technology, Qingdao 266061, China
| | - Ranran Jian
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Hongbo Chen
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China
| | - Xiaolong Tian
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China
| | - Changlong Sun
- College of Sino-German Science and Technology, Qingdao University of Science & Technology, Qingdao 266061, China
| | - Jing Zhu
- College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
| | - Zhaogang Yang
- Department of Radiation Oncology, The University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
| | - Jingyao Sun
- Academic Division of Engineering, Qingdao University of Science & Technology, Qingdao 266061, China.
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Chuansheng Wang
- Academic Division of Engineering, Qingdao University of Science & Technology, Qingdao 266061, China.
- College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China.
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