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Odintsov DS, Shundrina IK, Gismatulin AA, Azarov IA, Andreev RV, Gritsenko VA, Shundrin LA. HEAT-RESISTANT POLYIMIDES WITH ELECTRON-ACCEPTOR PENDANT GROUPS OF THE THIOXANTHENONE SERIES FOR RESISTIVE STORAGE DEVICES WITH A LOW SWITCHING VOLTAGE. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622110117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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2
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Ryu W, Xiang L, Jin KS, Kim HJ, Kim HC, Ree M. Newly Found Digital Memory Characteristics of Pyrrolidone- and Succinimide-Based Polymers. Macromol Rapid Commun 2021; 42:e2100186. [PMID: 33987942 DOI: 10.1002/marc.202100186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/27/2021] [Indexed: 11/10/2022]
Abstract
This study reports for the first time the excellent nonvolatile and volatile digital memory characteristics of polymers bearing 2-pyrrolidone and succinimide moieties. A series of new polymers is synthesized from poly(ethylene-alt-maleic anhydride) and four alcohol derivatives with and without 2-pyrrolidone and succinimide moieties. All polymers, including polyvinylpyrrolidone, are found to be thermally stable up to 195 °C or higher, and characterized regarding their molecular orbital energy levels, bandgap, and resistive digital memory behaviors. Excitingly, the polymers bearing either 2-pyrrolidone or succinimide moiety demonstrate p-type digital memory behaviors with high ON/OFF current ratios and long reliabilities. Nonvolatile digital memory performance is achieved over the film thickness range of 10-80 nm, whereas volatile digital memory is demonstrated over a much narrower range of film thickness. All digital memory performances can be originated from the 2-pyrrolidone and succinimide moieties possessing high affinity and stabilization power to charges via charge traps and transformations based on a hopping conduction process. Hence, these new polymers are suitable for the production of high-performance p-type nonvolatile and volatile digital memory devices. Moreover, 2-pyrrolidone and succinimide can be used as new and economical electroactive building blocks for the development of advanced digital memory materials.
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Affiliation(s)
- Wonyeong Ryu
- Division of Advanced Materials Science and Department of Chemistry, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Li Xiang
- Division of Advanced Materials Science and Department of Chemistry, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Kyeong Sik Jin
- PLS-II Beamline Division, Pohang Accelerator Laboratory, Pohang, 37673, Republic of Korea
| | - Hyun-Joong Kim
- Ceko Corporation, Surface Technology Institute, 519 Dunchon-daero, Jungwon-gu, Seongnam, 13216, Republic of Korea
| | - Hong-Chul Kim
- Ceko Corporation, Surface Technology Institute, 519 Dunchon-daero, Jungwon-gu, Seongnam, 13216, Republic of Korea
| | - Moonhor Ree
- Ceko Corporation, Surface Technology Institute, 519 Dunchon-daero, Jungwon-gu, Seongnam, 13216, Republic of Korea
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3
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Song Y, Zhao L, Yao H, Tian Y, Zhu S, Guan S. Novel Hyperbranched Polyimides Bearing Bis(trifluoromethyl)‐triphenylamine Moiety: Preparation and Rewritable Nonvolatile Memory Behaviours. ChemistrySelect 2021. [DOI: 10.1002/slct.202003923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ying Song
- College of Materials Science and Engineering Changchun University of Technology 2055 Yanan Street Changchun 130012 China
| | - Liqun Zhao
- College of Materials Science and Engineering Changchun University of Technology 2055 Yanan Street Changchun 130012 China
| | - Hongyan Yao
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer College of Chemistry Jilin University 2699 Qianjin Street Changchun 130012 China
| | - Ye Tian
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer College of Chemistry Jilin University 2699 Qianjin Street Changchun 130012 China
| | - Shiyang Zhu
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer College of Chemistry Jilin University 2699 Qianjin Street Changchun 130012 China
| | - Shaowei Guan
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer College of Chemistry Jilin University 2699 Qianjin Street Changchun 130012 China
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4
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Odintsov DS, Shundrina IK, Os'kina IA, Oleynik IV, Beckmann J, Shundrin LA. Ambipolar polyimides with pendant groups based on 9H-thioxanthene-9-one derivatives: synthesis, thermostability, electrochemical and electrochromic properties. Polym Chem 2020. [DOI: 10.1039/c9py01930h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New thermally stable polyimides with pendant groups based on 9H-thioxanthene-9-one and its S,S-dioxide display electrochemical and electrochromic activities caused by radical anion states of pendant groups and in-chain imide moieties.
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Affiliation(s)
- Danila S. Odintsov
- N.N. Vorozhtsov Institute of Organic Chemistry
- Siberian Branch
- Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Inna K. Shundrina
- N.N. Vorozhtsov Institute of Organic Chemistry
- Siberian Branch
- Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Irina A. Os'kina
- N.N. Vorozhtsov Institute of Organic Chemistry
- Siberian Branch
- Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Irina V. Oleynik
- N.N. Vorozhtsov Institute of Organic Chemistry
- Siberian Branch
- Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Jens Beckmann
- Institute for Inorganic Chemistry and Crystallography
- University of Bremen
- 28359 Bremen
- Germany
| | - Leonid A. Shundrin
- N.N. Vorozhtsov Institute of Organic Chemistry
- Siberian Branch
- Russian Academy of Sciences
- Novosibirsk
- Russia
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Yen HJ, Liou GS. Design and preparation of triphenylamine-based polymeric materials towards emergent optoelectronic applications. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2018.12.001] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Yang Y, Xia J, Ding Z, Zheng Y, Ding S, Shen Y. Synthesis and resistive switching characteristics of polyimides derived from 2,7-aryl substituents tetraphenyl fluorene diamines. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.08.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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7
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Yang Y, Ding Z, Xia J, Zheng Y, Ding S, Shen Y. Nonvolatile write-once read-many-times memory behaviors of polyimides containing tetraphenyl fluorene core and the pendant triphenylamine or carbazole moieties. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Yanhua Yang
- Applied Chemistry Department, School of Material Science & Engineering; Nanjing University of Aeronautics & Astronautics; Nanjing 210016 People's Republic of China
| | - Zijun Ding
- State Key Laboratory of ASIC and System, College of Microelectronics; Fudan University; Shanghai 200433 People's of Republic of China
| | - Jingcheng Xia
- State Key Laboratory of coordination chemistry, College of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 People's of Republic of China
| | - Youxuan Zheng
- State Key Laboratory of coordination chemistry, College of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 People's of Republic of China
| | - Shijin Ding
- State Key Laboratory of ASIC and System, College of Microelectronics; Fudan University; Shanghai 200433 People's of Republic of China
| | - Yingzhong Shen
- Applied Chemistry Department, School of Material Science & Engineering; Nanjing University of Aeronautics & Astronautics; Nanjing 210016 People's Republic of China
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Yang Y, Xia JC, Zheng Y, Shen Y, Gou G. Synthesis and non-volatile electrical memory characteristics of triphenylamine-based polyimides with flexibility segments. NEW J CHEM 2018. [DOI: 10.1039/c8nj04103b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two triphenylamine-based polyimides (PI(TPA-PMDA) and PI(TPA-BPDA)) containing a flexibility segments were prepared. The memory device of ITO/PI(TPA-PMDA)/Al exhibited write-once read-many-times (WORM) memory behavior, however, the memory device of PI(TPA-BPDA) demonstrated flash-type memory characteristics.
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Affiliation(s)
- Yanhua Yang
- Applied Chemistry Department
- School of Material Science and Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- P. R. China
| | - Jing-Cheng Xia
- State Key Laboratory of coordination chemistry
- College of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- P. R. China
| | - Youxuan Zheng
- State Key Laboratory of coordination chemistry
- College of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- P. R. China
| | - Yingzhong Shen
- Applied Chemistry Department
- School of Material Science and Engineering
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- P. R. China
| | - Gaozhang Gou
- Key Laboratory of Natural Pharmaceutical & Chemical Biology of Yunnan Province, College of Science, Honghe University, Mengzi
- P. R. China
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Jia N, Tian G, Qi S, Wang X, Wu D. Regulating the electrical bistable memory characteristics in functional polyimides by varying the spatial position of the electron-donating species. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.08.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Jia N, Tian G, Qi S, Cheng J, Wang X, Wu D. Asymmetric isomerization: an efficient strategy to tune the electrical resistive memory behaviors of functional polyimides containing N-phenylcarbazole moieties. RSC Adv 2017. [DOI: 10.1039/c7ra03454g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Three isomeric polyimides with exactly the same chemical components and altered spatial configuration possess vastly different memory behaviors.
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Affiliation(s)
- Nanfang Jia
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Changzhou Institute of Advanced Materials
| | - Guofeng Tian
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Changzhou Institute of Advanced Materials
| | - Shengli Qi
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Changzhou Institute of Advanced Materials
| | - Junhao Cheng
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Changzhou Institute of Advanced Materials
| | - Xiaodong Wang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Changzhou Institute of Advanced Materials
| | - Dezhen Wu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Changzhou Institute of Advanced Materials
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11
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Ren D, Li H, Zhu Y, Bai X. Synthesis, characterization and memory properties of novel organosoluble polyimides. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3844] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Decai Ren
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Department of Macromolecular Science and Engineering, School of Chemistry and Chemical Engineering; Heilongjiang University; Harbin 150080 China
- Heilongjiang East University; Harbin 150066 China
| | - Hongling Li
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Department of Macromolecular Science and Engineering, School of Chemistry and Chemical Engineering; Heilongjiang University; Harbin 150080 China
| | - Yu Zhu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Department of Macromolecular Science and Engineering, School of Chemistry and Chemical Engineering; Heilongjiang University; Harbin 150080 China
| | - Xuduo Bai
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Department of Macromolecular Science and Engineering, School of Chemistry and Chemical Engineering; Heilongjiang University; Harbin 150080 China
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12
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Zhang B, Chen Y, Neoh KG, Kang ET. Organic Electronic Memory Devices. ELECTRICAL MEMORY MATERIALS AND DEVICES 2015. [DOI: 10.1039/9781782622505-00001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
With the rapid development of the electronics industry in recent years, information technology devices, such as personal computers, mobile phones, digital cameras and media players, have become an essential part of our daily life. From both the technological and economic points of view, the development of novel information storage materials and devices has become an emergent issue facing the electronics industry. Due to the advantages of good scalability, flexibility, low cost, ease of processing, 3D-stacking capability and high capacity for data storage, organic-based electrical memory devices have been promising alternatives or supplementary devices to conventional inorganic semiconductor-based memory technology. The basic concepts and historical development of electronic memory devices are first presented. The following section introduces the structures and switching mechanisms of organic electronic memory devices classified as transistors, capacitors and resistors. Subsequently, the progress in the field of organic-based memory materials and devices is systematically summarized and discussed. Finally, the challenges posed to the development of novel organic electronic memory devices are summarized.
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Affiliation(s)
- Bin Zhang
- Department of Chemical & Biomolecular Engineering, National University of Singapore 10 Kent Ridge 119260 Singapore
- Key Lab for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Yu Chen
- Key Lab for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Koon-Gee Neoh
- Department of Chemical & Biomolecular Engineering, National University of Singapore 10 Kent Ridge 119260 Singapore
| | - En-Tang Kang
- Department of Chemical & Biomolecular Engineering, National University of Singapore 10 Kent Ridge 119260 Singapore
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13
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Solution-processable triarylamine-based high-performance polymers for resistive switching memory devices. Polym J 2015. [DOI: 10.1038/pj.2015.87] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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14
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Wu L, Wang P, Zhang C, He J, Chen D, Jun J, Xu Q, Lu J. Adjusting the Proportion of Electron-Withdrawing Groups in a Graft Functional Polymer for Multilevel Memory Performance. Chem Asian J 2015; 11:102-11. [PMID: 26395326 DOI: 10.1002/asia.201500842] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 09/16/2015] [Indexed: 11/06/2022]
Abstract
A polymer containing aldehyde active groups (PVB) was synthesized by atom transfer radical polymerization (ATRP), acting as a polymer precursor to graft a functional moiety via nucleophilic addition reaction. DHI (2-(1,5-dimethyl-hexyl)-6-hydrazino-benzo[de]isoquinoline-1,3-dione) and NPH (nitrophenyl hydrazine) groups, which contain naphthalimides that act as narrow traps and nitro groups that act as deep traps, were anchored onto the PVB at different ratios. A series of graft polymers were obtained and named PVB-DHI, PVB-DHI4 -NPH, PVB-DHI-NPH4 , and PVB-NPH. The chemical composition of the polymers was analyzed by (1) H-NMR spectroscopy and X-ray photoelectron spectroscopy (XPS). Memory devices were prepared from the polymers, and I-V characteristics were measured to determine the performance. By adjusting the ratio of different electron acceptors (DHI and NPH) to 4:1, ternary memory behavior was achieved. The relationship between memory behavior of PVB-DHIx NPHy and acceptor groups as well as their conduction mechanism were studied in detail.
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Affiliation(s)
- Linxin Wu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P.R. China
| | - Peng Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P.R. China
| | - Chunyu Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P.R. China
| | - Jinghui He
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P.R. China
| | - Dongyun Chen
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P.R. China
| | - Jiang Jun
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P.R. China
| | - Qingfeng Xu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P.R. China.
| | - Jianmei Lu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P.R. China.
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15
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Kappes RS, Schönfeld F, Li C, Golriz AA, Nagel M, Lippert T, Butt HJ, Gutmann JS. A study of photothermal laser ablation of various polymers on microsecond time scales. SPRINGERPLUS 2014; 3:489. [PMID: 25279287 PMCID: PMC4162890 DOI: 10.1186/2193-1801-3-489] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 08/19/2014] [Indexed: 11/15/2022]
Abstract
To analyze the photothermal ablation of polymers, we designed a temperature measurement setup based on spectral pyrometry. The setup allows to acquire 2D temperature distributions with 1 μm size and 1 μs time resolution and therefore the determination of the center temperature of a laser heating process. Finite element simulations were used to verify and understand the heat conversion and heat flow in the process. With this setup, the photothermal ablation of polystyrene, poly(α-methylstyrene), a polyimide and a triazene polymer was investigated. The thermal stability, the glass transition temperature Tg and the viscosity above Tg were governing the ablation process. Thermal decomposition for the applied laser pulse of about 10 μs started at temperatures similar to the start of decomposition in thermogravimetry. Furthermore, for polystyrene and poly(α-methylstyrene), both with a Tg in the range between room and decomposition temperature, ablation already occurred at temperatures well below the decomposition temperature, only at 30–40 K above Tg. The mechanism was photomechanical, i.e. a stress due to the thermal expansion of the polymer was responsible for ablation. Low molecular weight polymers showed differences in photomechanical ablation, corresponding to their lower Tg and lower viscosity above the glass transition. However, the difference in ablated volume was only significant at higher temperatures in the temperature regime for thermal decomposition at quasi-equilibrium time scales.
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Affiliation(s)
- Ralf S Kappes
- Max Planck Institute for Polymer Research, D-55128 Mainz, Germany ; Deutsches Textilforschungszentrum Nord-West gGmbH, D-47798 Krefeld, Germany
| | - Friedhelm Schönfeld
- Faculty of Engineering, Hochschule RheinMain University of Applied Sciences, D-65428 Rüsselsheim, Germany
| | - Chen Li
- Max Planck Institute for Polymer Research, D-55128 Mainz, Germany
| | - Ali A Golriz
- Max Planck Institute for Polymer Research, D-55128 Mainz, Germany ; Center for Nanointegration Duisburg-Essen (CENIDE), University Duisburg-Essen, D-45141 Essen, Germany
| | - Matthias Nagel
- Functional Polymers, EMPA Swiss Federal Lab. for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - Thomas Lippert
- Materials Group, Paul Scherrer Institute, CH-5232 Villigen, PSI, Switzerland
| | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, D-55128 Mainz, Germany
| | - Jochen S Gutmann
- Deutsches Textilforschungszentrum Nord-West gGmbH, D-47798 Krefeld, Germany ; Center for Nanointegration Duisburg-Essen (CENIDE), University Duisburg-Essen, D-45141 Essen, Germany
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Chou YH, Tsai CL, Chen WC, Liou GS. Nonvolatile transistor memory devices based on high-k electrets of polyimide/TiO2hybrids. Polym Chem 2014. [DOI: 10.1039/c4py00825a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Ko YG, Kim DM, Kim K, Jung S, Wi D, Michinobu T, Ree M. Digital memory versatility of fully π-conjugated donor-acceptor hybrid polymers. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8415-8425. [PMID: 24779635 DOI: 10.1021/am5013134] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The fully π-conjugated donor-acceptor hybrid polymers Fl-TPA, Fl-TPA-TCNE, and Fl-TPA-TCNQ, which are composed of fluorene (Fl), triphenylamine (TPA), dimethylphenylamine, alkyne, alkyne-tetracyanoethylene (TCNE) adduct, and alkyne-7,7,8,8-tetracyanoquinodimethane (TCNQ) adduct, were synthesized. These polymers are completely amorphous in the solid film state and thermally stable up to 291-409 °C. Their molecular orbital levels and band gaps vary with their compositions. The TCNE and TCNQ units, despite their electron-acceptor characteristics, were found to enhance the π-conjugation lengths of Fl-TPA-TCNE and Fl-TPA-TCNQ (i.e., to produce red shifts in their absorption spectra and significant reductions in their band gaps). These changes are reflected in the electrical digital memory behavior of the polymers. Moreover, the TCNE and TCNQ units were found to diversify the digital memory modes and to widen the active polymer layer thickness window. In devices with aluminum top and bottom electrodes, the Fl-TPA polymer exhibits stable unipolar permanent memory behavior with high reliability. The Fl-TPA-TCNE and Fl-TPA-TCNQ devices exhibit stable unipolar permanent memory behavior as well as dynamic random access memory behavior with excellent reliability. These polymer devices were found to operate by either hole injection or hole injection along with electron injection, depending on the polymer composition. Overall, this study demonstrated that the incorporation of π-conjugated cyano moieties, which control both the π-conjugation length and electron-accepting power, is a sound approach for the design and synthesis of high-performance digital memory polymers. The TCNE and TCNQ polymers synthesized in this study are highly suitable active materials for the low-cost mass production of high-performance, polarity-free, programmable, volatile, and permanent memory devices that can be operated with very low power consumption, high ON/OFF current ratios, and high reliability.
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Affiliation(s)
- Yong-Gi Ko
- Department of Chemistry, Division of Advanced Materials Science, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Pohang Accelerator Laboratory, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology (POSTECH) , Pohang 790-784, Republic of Korea
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Lin WP, Liu SJ, Gong T, Zhao Q, Huang W. Polymer-based resistive memory materials and devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:570-606. [PMID: 24339246 DOI: 10.1002/adma.201302637] [Citation(s) in RCA: 221] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2013] [Revised: 07/27/2013] [Indexed: 06/03/2023]
Abstract
Due to the advantages of good scalability, flexibility, low cost, ease of processing, 3D-stacking capability, and large capacity for data storage, polymer-based resistive memories have been a promising alternative or supplementary devices to conventional inorganic semiconductor-based memory technology, and attracted significant scientific interest as a new and promising research field. In this review, we first introduced the general characteristics of the device structures and fabrication, memory effects, switching mechanisms, and effects of electrodes on memory properties associated with polymer-based resistive memory devices. Subsequently, the research progress concerning the use of single polymers or polymer composites as active materials for resistive memory devices has been summarized and discussed. In particular, we consider a rational approach to their design and discuss how to realize the excellent memory devices and understand the memory mechanisms. Finally, the current challenges and several possible future research directions in this field have also been discussed.
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Affiliation(s)
- Wen-Peng Lin
- Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Wenyuan Road 9, Nanjing City, Jiangsu Province, 210023, China
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20
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Kurosawa T, Higashihara T, Ueda M. Polyimide memory: a pithy guideline for future applications. Polym Chem 2013. [DOI: 10.1039/c2py20632c] [Citation(s) in RCA: 158] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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21
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Liu Y, Zhang Y, Lan Q, Qin Z, Liu S, Zhao C, Chi Z, Xu J. Synthesis and properties of high-performance functional polyimides containing rigid nonplanar conjugated tetraphenylethylene moieties. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26498] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Chou YH, You NH, Kurosawa T, Lee WY, Higashihara T, Ueda M, Chen WC. Thiophene and Selenophene Donor–Acceptor Polyimides as Polymer Electrets for Nonvolatile Transistor Memory Devices. Macromolecules 2012. [DOI: 10.1021/ma301326r] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Ying-Hsuan Chou
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10617
| | - Nam-Ho You
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku,
Tokyo, 152-8552 Japan
| | - Tadanori Kurosawa
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku,
Tokyo, 152-8552 Japan
| | - Wen-Ya Lee
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10617
| | - Tomoya Higashihara
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku,
Tokyo, 152-8552 Japan
| | - Mitsuru Ueda
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku,
Tokyo, 152-8552 Japan
| | - Wen-Chang Chen
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10617
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23
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Kim K, Yen HJ, Ko YG, Chang CW, Kwon W, Liou GS, Ree M. Electrically bistable digital memory behaviors of thin films of polyimides based on conjugated bis(triphenylamine) derivatives. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.07.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Ko YG, Kwon W, Yen HJ, Chang CW, Kim DM, Kim K, Hahm SG, Lee TJ, Liou GS, Ree M. Various Digital Memory Behaviors of Functional Aromatic Polyimides Based on Electron Donor and Acceptor Substituted Triphenylamines. Macromolecules 2012. [DOI: 10.1021/ma300311d] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yong-Gi Ko
- Department of Chemistry, Division of Advanced Materials Science, Pohang Accelerator Laboratory, Center for Electro-Photo Behaviors in Advanced Molecular Systems, BK School of Molecular Science, and Polymer Research Institute, Pohang University of Science & Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Wonsang Kwon
- Department of Chemistry, Division of Advanced Materials Science, Pohang Accelerator Laboratory, Center for Electro-Photo Behaviors in Advanced Molecular Systems, BK School of Molecular Science, and Polymer Research Institute, Pohang University of Science & Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Hung-Ju Yen
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Cha-Wen Chang
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Dong Min Kim
- Department of Chemistry, Division of Advanced Materials Science, Pohang Accelerator Laboratory, Center for Electro-Photo Behaviors in Advanced Molecular Systems, BK School of Molecular Science, and Polymer Research Institute, Pohang University of Science & Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Kyungtae Kim
- Department of Chemistry, Division of Advanced Materials Science, Pohang Accelerator Laboratory, Center for Electro-Photo Behaviors in Advanced Molecular Systems, BK School of Molecular Science, and Polymer Research Institute, Pohang University of Science & Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Suk Gyu Hahm
- Department of Chemistry, Division of Advanced Materials Science, Pohang Accelerator Laboratory, Center for Electro-Photo Behaviors in Advanced Molecular Systems, BK School of Molecular Science, and Polymer Research Institute, Pohang University of Science & Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Taek Joon Lee
- Department of Chemistry, Division of Advanced Materials Science, Pohang Accelerator Laboratory, Center for Electro-Photo Behaviors in Advanced Molecular Systems, BK School of Molecular Science, and Polymer Research Institute, Pohang University of Science & Technology (POSTECH), Pohang 790-784, Republic of Korea
| | - Guey-Sheng Liou
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Moonhor Ree
- Department of Chemistry, Division of Advanced Materials Science, Pohang Accelerator Laboratory, Center for Electro-Photo Behaviors in Advanced Molecular Systems, BK School of Molecular Science, and Polymer Research Institute, Pohang University of Science & Technology (POSTECH), Pohang 790-784, Republic of Korea
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25
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Kim DM, Ko YG, Choi JK, Kim K, Kwon W, Jung J, Yoon TH, Ree M. Digital memory behaviors of aromatic polyimides bearing bis(trifluoromethyl)- and bithiophenyl-triphenylamine units. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.02.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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26
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Hu YC, Chen CJ, Yen HJ, Lin KY, Yeh JM, Chen WC, Liou GS. Novel triphenylamine-containing ambipolar polyimides with pendant anthraquinone moiety for polymeric memory device, electrochromic and gas separation applications. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm33266c] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Chen CJ, Yen HJ, Chen WC, Liou GS. Resistive switching non-volatile and volatile memory behavior of aromatic polyimides with various electron-withdrawing moieties. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32155f] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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28
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Hu B, Zhuge F, Zhu X, Peng S, Chen X, Pan L, Yan Q, Li RW. Nonvolatile bistable resistive switching in a new polyimide bearing 9-phenyl-9H-carbazole pendant. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm13849a] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Li Y, Chu Y, Fang R, Ding S, Wang Y, Shen Y, Zheng A. Synthesis and memory characteristics of polyimides containing noncoplanar aryl pendant groups. POLYMER 2012. [DOI: 10.1016/j.polymer.2011.11.044] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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30
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Lee TJ, Ko YG, Yen HJ, Kim K, Kim DM, Kwon W, Hahm SG, Liou GS, Ree M. Programmable digital nonvolatile memory behaviors of donor–acceptor polyimides bearing triphenylamine derivatives: effects of substituents. Polym Chem 2012. [DOI: 10.1039/c2py00617k] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Lin PH, Lee WY, Wu WC, Chen WC. Synthesis, properties, and electrical memory characteristics of new diblock copolymers of polystyrene-block-poly(styrene-pyrene). Polym Bull (Berl) 2011. [DOI: 10.1007/s00289-011-0686-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Li Y, Fang R, Ding S, Shen Y. Rewritable and Non-Volatile Memory Effects Based on Polyimides Containing Pendant Carbazole and Triphenylamine Groups. MACROMOL CHEM PHYS 2011. [DOI: 10.1002/macp.201100373] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Li Y, Xu H, Tao X, Qian K, Fu S, Ding S, Shen Y. Resistive switching characteristics of polyimides derived from 2,2′-aryl substituents tetracarboxylic dianhydrides. POLYM INT 2011. [DOI: 10.1002/pi.3127] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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34
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CHen CJ, Yen HJ, Chen WC, Liou GS. Novel high-performance polymer memory devices containing (OMe)2tetraphenyl-p-phenylenediamine moieties. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24807] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Kim JC, Jung J, Rho Y, Kim M, Kwon W, Kim H, Kim IJ, Kim JR, Ree M. Well-defined DNA-mimic brush polymers bearing adenine moieties: synthesis, layer-by-layer self-assembly, and biocompatibility. Biomacromolecules 2011; 12:2822-33. [PMID: 21595437 DOI: 10.1021/bm200572t] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two new DNA-mimicking brush polymers were synthesized: poly[oxy(11-(3-(9-adeninyl)propionato)-undecanyl-1-thiomethyl)ethylene] (PECH-AP) and poly[oxy(11-(5-(9-adenylethyloxy)-4-oxopentanoato)undecanyl-1-thiomethyl)ethylene] (PECH-AS). These polymers were found to be thermally stable up to 220 °C and could be applied easily by conventional coating processes to produce good quality films. Interestingly, both brush polymers formed molecular multibilayer structures to provide an adenine-rich surface. Despite the structural similarities, PECH-AS surprisingly exhibited higher hydrophilicity and better water sorption properties than PECH-AP. These differences were attributed to the chemical structures in the bristles of the polymers. The adenine-rich surfaces of the polymer films demonstrated selective protein adsorption, suppressed bacterial adherence, facilitated HEp-2 cell adhesion, and exhibited good biocompatibility in mice. However, the high hydrophilicity and good water sorption characteristics of the PECH-AS film suggest that this brush polymer is better suited to applications requiring good biocompatibility and reduced chance of bacterial infection compared with the PECH-AP film.
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Affiliation(s)
- Jin Chul Kim
- Department of Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
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36
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Synthesis and nonvolatile memory characteristics of thermally, dimensionally and chemically stable polyimides. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.03.021] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Li Y, Xu H, Tao X, Qian K, Fu S, Shen Y, Ding S. Synthesis and memory characteristics of highly organo-soluble polyimides bearing a noncoplanar twisted biphenyl unit containing aromatic side-chain groups. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02547j] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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38
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Lai YC, Ohshimizu K, Lee WY, Hsu JC, Higashihara T, Ueda M, Chen WC. Electrically bistable memory devices based on all-conjugated block copolythiophenes and their PCBM composite films. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11570g] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Ma Y, Wen Y, Song Y. Ultrahigh density data storage based on organic materials with SPM techniques. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02471f] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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41
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Tian G, Wu D, Qi S, Wu Z, Wang X. Dynamic Random Access Memory Effect and Memory Device Derived from a Functional Polyimide Containing Electron Donor-Acceptor Pairs in the Main Chain. Macromol Rapid Commun 2010; 32:384-9. [DOI: 10.1002/marc.201000570] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 10/09/2010] [Indexed: 11/09/2022]
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42
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Park S, Lee TJ, Kim DM, Kim JC, Kim K, Kwon W, Ko YG, Choi H, Chang T, Ree M. Electrical Memory Characteristics of a Nondoped π-Conjugated Polymer Bearing Carbazole Moieties. J Phys Chem B 2010; 114:10294-301. [DOI: 10.1021/jp101062a] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Samdae Park
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
| | - Taek Joon Lee
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
| | - Dong Min Kim
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
| | - Jin Chul Kim
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
| | - Kyungtae Kim
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
| | - Wonsang Kwon
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
| | - Yong-Gi Ko
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
| | - Heungyeal Choi
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
| | - Taihyun Chang
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
| | - Moonhor Ree
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Division of Advanced Materials Science, National Research Lab for Polymer Physical Chemistry, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology, Pohang 790-784, Republic of Korea
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43
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Kuorosawa T, Chueh CC, Liu CL, Higashihara T, Ueda M, Chen WC. High Performance Volatile Polymeric Memory Devices Based on Novel Triphenylamine-based Polyimides Containing Mono- or Dual-Mediated Phenoxy Linkages. Macromolecules 2010. [DOI: 10.1021/ma902574n] [Citation(s) in RCA: 143] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tadanori Kuorosawa
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Chu-Chen Chueh
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106
| | - Cheng-Liang Liu
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106
| | - Tomoya Higashihara
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Mitsuru Ueda
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Wen-Chang Chen
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan 106
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44
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Hahm SG, Jin KS, Park S, Ree M, Kim HS, Kwon SK, Kim YH. The alignment of liquid crystals on the film surfaces of soluble aromatic polyimides bearingt-butylphenyl and trimethylsilylphenyl side groups. Macromol Res 2009. [DOI: 10.1007/bf03218645] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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45
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Liu CL, Hsu JC, Chen WC, Sugiyama K, Hirao A. Non-volatile memory devices based on polystyrene derivatives with electron-donating oligofluorene pendent moieties. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1974-1979. [PMID: 20355822 DOI: 10.1021/am900346j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report bistable non-volatile memory devices based on polystyrene derivatives containing pendent electron-donating mono-, di-, and tri(9,9-dihexylfluorene), which are denoted as poly(St-Fl), poly(St-Fl(2)), and poly(St-Fl(3)), respectively. The effects of the oligofluorene chain lengths and polymer surface structures on the memory characteristics were explored. Poly(St-Fl)-, poly(St-Fl(2))-, and poly(St-Fl(3))-based devices exhibited a flash memory characteristic with different turn-on threshold voltages of 2.8, 2.0, and 1.8 V, respectively, which was on the reverse trend with the highest occupied molecular orbital levels of -5.86, -5.80, and -5.77 eV. Moreover, the memory device showed a high ON/OFF current ratio of 2.5 x 10(4) and a long retention time of 10(4) s. The possible mechanism of the switching behavior was explained by the space-charge-limited-current theory and filamentary conduction. The larger aggregation domain size of the polymer thin film processed from the mixed solvent of chlorobenzene/N,N-dimethylformamide probably promoted the diffusion of the Al atoms into the polymer film and formed the conduction channel. Thus, it significantly reduced the turn-on threshold voltage on the studied polymer memory devices. The present study suggested that the polymer memory characteristics could be efficiently tuned through the pendent conjugated chain length and surface structures.
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Affiliation(s)
- Cheng-Liang Liu
- Department of Chemical Engineering and Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan 10617
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