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Tactile sensing technology in bionic skin: A review. Biosens Bioelectron 2022; 220:114882. [DOI: 10.1016/j.bios.2022.114882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 10/13/2022] [Accepted: 11/02/2022] [Indexed: 11/06/2022]
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Nakayama Y, Tsuruta R, Koganezawa T. 'Molecular Beam Epitaxy' on Organic Semiconductor Single Crystals: Characterization of Well-Defined Molecular Interfaces by Synchrotron Radiation X-ray Diffraction Techniques. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7119. [PMID: 36295203 PMCID: PMC9605552 DOI: 10.3390/ma15207119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/04/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Epitaxial growth, often termed "epitaxy", is one of the most essential techniques underpinning semiconductor electronics, because crystallinities of the materials seriously dominate operation efficiencies of the electronic devices such as power gain/consumption, response speed, heat loss, and so on. In contrast to already well-established epitaxial growth methodologies for inorganic (covalent or ionic) semiconductors, studies on inter-molecular (van der Waals) epitaxy for organic semiconductors is still in the initial stage. In the present review paper, we briefly summarize recent works on the epitaxial inter-molecular junctions built on organic semiconductor single-crystal surfaces, particularly on single crystals of pentacene and rubrene. Experimental methodologies applicable for the determination of crystal structures of such organic single-crystal-based molecular junctions are also illustrated.
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Affiliation(s)
- Yasuo Nakayama
- Department of Pure and Applied Chemistry, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan
- Division of Colloid and Interface Science, Tokyo University of Science, Noda 278-8510, Japan
- Research Group for Advanced Energy Conversion, Tokyo University of Science, Noda 278-8510, Japan
| | - Ryohei Tsuruta
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8577, Japan
| | - Tomoyuki Koganezawa
- Industrial Application Division, Japan Synchrotron Radiation Research Institute (JASRI), Hyogo 679-5198, Japan
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Du Q, Qin S, Wang Z, Gan Y, Zhang Y, Fan L, Liu Y, Li S, Dong R, Liu C, Wang W, Wang F. Highly Sensitive and Ultrafast Organic Phototransistor Based on Rubrene Single Crystals. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57735-57742. [PMID: 34841872 DOI: 10.1021/acsami.1c18862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Rubrene single crystals have received a lot of attention for their great potential in electronic and wearable nanoelectronics due to their high carrier mobility and excellent flexibility. While they exhibited remarkable electrical performances, their intrinsic potential as photon detectors has not been fully exploited. Here, we fabricate a sensitive and ultrafast organic phototransistor based on rubrene single crystals. The device covers the ultraviolet to visible range (275-532 nm), and the responsivity and detectivity can reach up to ∼4000 A W-1 and 1011 jones at 532 nm, respectively. Furthermore, the response times are highly gate-tunable down to sub-90 μs, and the cutoff frequency is ∼4 kHz, which is one of the fastest organic material-based phototransistors reported so far. Equally important is that the fabricated device exhibits stable light detection ability even after 8 months, indicating great long-term stability and excellent environmental robustness. The results suggest that the high-quality rubrene single crystal may be a promising material for future flexible optoelectronics with its intrinsic mechanical flexibility.
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Affiliation(s)
- Qianqian Du
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Shuchao Qin
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Zhifeng Wang
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Yuquan Gan
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Yuting Zhang
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Linsheng Fan
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Yunlong Liu
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Shuhong Li
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Ruixin Dong
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Cailong Liu
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Wenjun Wang
- Key Laboratory of Optical Communication Science and Technology of Shandong Province, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
| | - Fengqiu Wang
- School of Electronic Science and Engineering and Key Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing University, Nanjing 210093, China
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Bhat G, Liu Q, Kielar M, Hamada Y, Michinobu T, Sah P, Ko Kyaw AK, Pandey AK, Sonar P. Energy-Level Manipulation in Novel Indacenodithiophene-Based Donor-Acceptor Polymers for Near-Infrared Organic Photodetectors. ACS APPLIED MATERIALS & INTERFACES 2021; 13:29866-29875. [PMID: 34152743 DOI: 10.1021/acsami.1c03643] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Organic photodetectors (OPDs) are promising candidates for next-generation digital imaging and wearable sensors due to their low cost, tuneable optoelectrical properties combined with high-level performance, and solution-processed fabrication techniques. However, OPD detection is often limited to shorter wavelengths, whereas photodetection in the near-infrared (NIR) region is increasingly being required for wearable electronics and medical device applications. NIR sensing suffers from low responsivity and high dark currents. A common approach to enhance NIR photon detection is lowering the optical band gap via donor-acceptor (D-A) molecular engineering. Herein, we present the synthesis of two novel indacenodithiophene (IDT)-based D-A conjugated polymers, namely, PDPPy-IT and PSNT-IT via palladium-catalyzed Stille coupling reactions. These novel polymers exhibit optical band gaps of 1.81 and 1.27 eV for PDPPy-IT and PSNT-IT, respectively, with highly desirable visible and NIR light detection through energy-level manipulation. Moreover, excellent materials' solubility and thin-film processability allow easy incorporation of these polymers as an active layer into OPDs for light detection. In the case of PSNT-IT devices, a photodetection up to 1000 nm is demonstrated with a peak sensitivity centered at 875 nm, whereas PDPPy-IT devices are efficient in detecting the visible spectrum with the highest sensitivity at 660 nm. Overall, both OPDs exhibit spectral responsivities up to 0.11 A W-1 and dark currents in the nA cm-2 range. With linear dynamic ranges exceeding 140 dB and fast response times recorded below 100 μs, the use of novel IDT-based polymers in OPDs shows great potential for wearable optoelectronics.
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Affiliation(s)
- Gurudutt Bhat
- School of Chemistry and Physics, Science Faculty, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Qian Liu
- School of Chemistry and Physics, Science Faculty, Queensland University of Technology, Brisbane, Queensland 4001, Australia
- Guangdong University Key Laboratory for Advanced Quantum Dot Displays, Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Marcin Kielar
- Queensland Brain Institute, The University of Queensland, St Lucia, Queensland 4072, Australia
- School of Electrical Engineering and Robotics, Engineering Faculty, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Yuya Hamada
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Tsuyoshi Michinobu
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Pankaj Sah
- Queensland Brain Institute, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Aung Ko Ko Kyaw
- Guangdong University Key Laboratory for Advanced Quantum Dot Displays, Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ajay K Pandey
- School of Electrical Engineering and Robotics, Engineering Faculty, Queensland University of Technology, Brisbane, Queensland 4001, Australia
- Centre for Material Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Prashant Sonar
- School of Chemistry and Physics, Science Faculty, Queensland University of Technology, Brisbane, Queensland 4001, Australia
- Centre for Material Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia
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Tang Y, Liu H, Pan J, Zhang Z, Xu Y, Yao N, Zhang L, Tong L. Optical Micro/Nanofiber-Enabled Compact Tactile Sensor for Hardness Discrimination. ACS APPLIED MATERIALS & INTERFACES 2021; 13:4560-4566. [PMID: 33435667 DOI: 10.1021/acsami.0c20392] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Optical micro/nanofibers (MNFs) can be applied for ultrasensitive tactile sensing with fast response and compact size, which are attractive for restoring tactile information in minimally invasive robotic surgery and tissue palpation. Herein, we present a compact tactile sensor (CTS) with a diameter of 1.5 mm enabled by an optical MNF. The CTS provides continuous readouts for high-fidelity transduction of touch and pressure stimuli into interpretable optical signals, which permit instantaneous sensing of contact and pressure with pressure-sensing sensitivity as high as 0.108 mN-1 and a resolution of 0.031 mN. Working in pressing mode, the CTS can discriminate the difference in the hardness of two poly(dimethylsiloxane) (PDMS) slats (with shore A of 36 and 40) directly, a hardness resolving ability even beyond the human hands. Benefitting from the fast response feature, the CTS can also be operated in either scanning or tapping mode, making it feasible for hardness identification by analyzing the shape of the response curve. As a proof of concept, the hardness discrimination of a pork liver and an adductor muscle was experimentally demonstrated. Such MNF-enabled compact tactile sensors may pave the way for hardness sensing in tissue palpation, surgical robotics, and object identification.
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Affiliation(s)
- Yao Tang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Haitao Liu
- Research Center for Intelligent Sensing, Zhejiang Lab, Hangzhou 311121, China
| | - Jing Pan
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhang Zhang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yue Xu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ni Yao
- Research Center for Intelligent Sensing, Zhejiang Lab, Hangzhou 311121, China
| | - Lei Zhang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Research Center for Intelligent Sensing, Zhejiang Lab, Hangzhou 311121, China
| | - Limin Tong
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
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Gogoi G, Bhattacharya L, Sahoo SR, Sahu S, Sarma NS, Sharma S. Enhancement of air-stability, π-stacking ability, and charge transport properties of fluoroalkyl side chain engineered n-type naphthalene tetracarboxylic diimide compounds. RSC Adv 2021; 11:57-70. [PMID: 35423045 PMCID: PMC8690421 DOI: 10.1039/d0ra08345c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 11/26/2020] [Indexed: 11/21/2022] Open
Abstract
In this study, the impact of fluoroalkyl side chain substitution on the air-stability, π-stacking ability, and charge transport properties of the versatile acceptor moiety naphthalene tetracarboxylic diimide (NDI) has been explored. A density functional theory (DFT) study has been carried out for a series of 24 compounds having different side chains (alkyl, fluoroalkyl) through the imide nitrogen position of NDI moiety. The fluoroalkyl side chain engineered NDI compounds have much deeper highest occupied molecular orbitals (HOMO) and lowest unoccupied molecular orbitals (LUMO) than those of their alkyl substituted compounds due to the electron withdrawing nature of fluoroalkyl groups. The higher electron affinity (EA > 2.8 eV) and low-lying LUMO levels (<−4.00 eV) for fluoroalkyl substituted NDIs reveal that they may exhibit better air-stability with superior n-type character. The computed optical absorption spectra (∼386 nm) for all the investigated NDIs using time-dependent DFT (TD-DFT) lie in the ultra-violet (UV) region of the solar spectrum. In addition, the low value of the LOLIPOP (Localized Orbital Locator Integrated Pi Over Plane) index for fluoroalkyl side chain comprising NDI compounds indicates better π–π stacking ability. This is also in good agreement for the predicted π–π stacking interaction obtained from a molecular electrostatic potential energy surface (ESP) study. The π–π stacking is thought to be of cofacial interaction for the fluoroalkyl substituted compounds and herringbone interaction for the alkyl substituted compounds. The calculated results shed light on why side chain engineering with fluoroalkyl groups can effectively lead to better air-stability, π-stacking ability and improved charge transport properties. In this study, the impact of fluoroalkyl side chain substitution on the air-stability, π-stacking ability, and charge transport properties of the versatile acceptor moiety naphthalene tetracarboxylic diimide (NDI) has been explored.![]()
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Affiliation(s)
- Gautomi Gogoi
- Advanced Materials Laboratory
- Physical Sciences Division
- Institute of Advanced Study in Science and Technology
- Guwahati-781035
- India
| | - Labanya Bhattacharya
- High Performance Computing Lab
- Department of Physics
- Indian Institute of Technology (Indian School of Mines)
- Dhanbad
- India
| | - Smruti R. Sahoo
- High Performance Computing Lab
- Department of Physics
- Indian Institute of Technology (Indian School of Mines)
- Dhanbad
- India
| | - Sridhar Sahu
- High Performance Computing Lab
- Department of Physics
- Indian Institute of Technology (Indian School of Mines)
- Dhanbad
- India
| | - Neelotpal Sen Sarma
- Advanced Materials Laboratory
- Physical Sciences Division
- Institute of Advanced Study in Science and Technology
- Guwahati-781035
- India
| | - Sagar Sharma
- Department of Chemistry
- School of Fundamental and Applied Sciences
- Assam Don Bosco University
- Guwahati-782402
- India
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