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Baraily M, Baro B, Boruah R, Bayan S. PVDF-HFP encapsulated WS 2nanosheets in droplet-based triboelectric nanogenerators for possible detection of human Na +/K +ion concentration. NANOTECHNOLOGY 2024; 35:365502. [PMID: 38861959 DOI: 10.1088/1361-6528/ad5684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Accepted: 06/11/2024] [Indexed: 06/13/2024]
Abstract
Here we report the liquid-solid interaction in droplet-based triboelectric nanogenerators (TENG) for estimation of human Na+/K+levels. The exploitation of PVDF-HFP encapsulated WS2as active layer in the droplet-based TENG (DTENG) leads to the generation of electrical signal during the impact of water droplet. Comparison over the control devices indicates that surface quality and dielectric nature of the PVDF-HFP/WS2composite largely dictates the performance of the DTENG. The demonstration of excellent sensitivity of the DTENG towards water quality indicates its promising application towards water testing. In addition, the alteration in output signal with slightest variation in ionic concentration (Na+or K+) in water has been witnessed and is interpreted with charge transfer and ion transfer processes during liquid-solid interaction. The study reveals that the ion mobility largely affects the ion adsorption process on the active layer of PVDF-HFP/WS2and thus generates distinct output profiles for diverse ions like Na+and K+. Following that, the DTENG characteristics have been exploited to artificial urine where the varying output signals have been recorded for variation in urinary Na+ion concentration. Therefore, the deployment of PVDF-HFP/WS2in DTENG holds promising application towards the analyse of ionic characteristics of body fluids.
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Affiliation(s)
- Madhav Baraily
- Department of Physics, Rajiv Gandhi University, Doimukh, Arunachal Pradesh 791112, India
| | - Bikash Baro
- Department of Physics, Rajiv Gandhi University, Doimukh, Arunachal Pradesh 791112, India
| | - Ratan Boruah
- Sophisticated Analytical Instrumentation Centre, Tezpur University, Tezpur, Assam 782028, India
| | - Sayan Bayan
- Department of Physics, Rajiv Gandhi University, Doimukh, Arunachal Pradesh 791112, India
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Thirumalasetty AB, Pamula S, Krishnan T, Khade V, Sharief P, Kota Venkata SK, Adiraj S, Wuppulluri M. Energy storage and catalytic behaviour of cmWave assisted BZT and flexible electrospun BZT fibers for energy harvesting applications. Sci Rep 2024; 14:2650. [PMID: 38302664 PMCID: PMC10834441 DOI: 10.1038/s41598-024-52705-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/22/2024] [Indexed: 02/03/2024] Open
Abstract
High-performance lead-free Barium Zirconium Titanate (BZT) based ceramics have emerged as a potential candidate for applications in energy storage, catalysis for electro chemical energy conversion and energy harvesting devices as presented in this work. In the present study hybrid microwave sintered BZT are studied for dielectric, ferroelectric and phase transition properties. BZT ceramic exhibits tetragonal structure as confirmed by the Retvield refinement studies. XPS studies confirms the elemental composition of BZT and presence of Zr. Polarization versus electric field hysteresis loops confirms the ferroelectric behaviour of BZT ceramic. Encouragingly, the BZT showed a moderate energy storage efficiency of 30.7 % and relatively good electro chemical energy conversion (HER). Excellent catalytic activity observed for BZT electrode in acid medium with low Tafel slope 77 mV dec-1. Furthermore, electrospun nanofibers made of PVDF-HFP and BZT are used to make flexible piezoelectric nano generators (PENGs). FTIR studies show that the 16 wt% BZT composite ink exhibits a higher electroactive beta phase. The optimized open-circuit voltage and short circuit current of the flexible PENG exhibits 7Vpp and 750 nA under an applied force of 3N. Thus, flexible and self-powered BZT PENGs are alternative source of energy due to its reliability, affordability and environmental-friendly nature.
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Affiliation(s)
- Avanish Babu Thirumalasetty
- Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamilnadu, 632014, India
| | - Siva Pamula
- Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamilnadu, 632014, India
| | | | - Vaishnavi Khade
- Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamilnadu, 632014, India
| | - Pathan Sharief
- Department of nanotechnology, Deagu Gyeongbuk Institute of Science and Technology, Deagu, South Korea
| | - Siva Kumar Kota Venkata
- Ceramic Composite Materials Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapuram, Andhra Pradesh, 515003, India
| | - Srinivas Adiraj
- Defence Metallurgical Research Laboratory Kanchanbagh, Hyderabad, India
| | - Madhuri Wuppulluri
- Ceramic Composites Laboratory, Centre for Functional Materials, Vellore Institute of Technology, Vellore, Tamilnadu, 632014, India.
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Liu J, Zeng S, Zhang M, Xiong J, Gu H, Wang Z, Hu Y, Zhang X, Du Y, Ren L. Giant Piezoelectric Output and Stability Enhancement in Piezopolymer Composites with Liquid Metal Nanofillers. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304096. [PMID: 37705125 PMCID: PMC10754131 DOI: 10.1002/advs.202304096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Indexed: 09/15/2023]
Abstract
Integrating nanomaterials into the polymer matrix is an effective strategy to optimize the performance of polymer-based piezoelectric devices. Nevertheless, the trade-off between the output enhancement and stability maintenance of piezoelectric composites usually leads to an unsatisfied overall performance for the high-strength operation of devices. Here, by setting liquid metal (LM) nanodroplets as the nanofillers in a poly(vinylidene difluoride) (PVDF) matrix, the as-formed liquid-solid/conductive-dielectric interfaces significantly promote the piezoelectric output and the reliability of this piezoelectric composite. A giant performance improvement featured is obtained with, nearly 1000% boosting on the output voltage (as high as 212 V), 270% increment on the piezoelectric coefficient (d33 ∼51.1 pC N-1 ) and long-term reliability on both structure and output (over 36 000 cycles). The design of a novel heterogenous interface with both mechanical matching and electric coupling can be the new orientation for developing high performance piezoelectric composite-based devices.
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Affiliation(s)
- Jingyan Liu
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and DevicesSchool of MicroelectronicsHubei UniversityWuhan430062P. R. China
| | - Shi Zeng
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and DevicesSchool of MicroelectronicsHubei UniversityWuhan430062P. R. China
| | - Mingrui Zhang
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and DevicesSchool of MicroelectronicsHubei UniversityWuhan430062P. R. China
| | - Juan Xiong
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and DevicesSchool of MicroelectronicsHubei UniversityWuhan430062P. R. China
| | - Haoshuang Gu
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and DevicesSchool of MicroelectronicsHubei UniversityWuhan430062P. R. China
| | - Zhao Wang
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and DevicesSchool of MicroelectronicsHubei UniversityWuhan430062P. R. China
| | - Yongming Hu
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and DevicesSchool of MicroelectronicsHubei UniversityWuhan430062P. R. China
| | - Xianghui Zhang
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and DevicesSchool of MicroelectronicsHubei UniversityWuhan430062P. R. China
| | - Yi Du
- Center of Quantum and Matter Science and School of PhysicsBeihang UniversityBeijing100191P. R. China
| | - Long Ren
- State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingInternational School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070P. R. China
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Bhattacharya D, Mukherjee S, Mitra RK, Ray SK. TMDC ternary alloy-based triboelectric nanogenerators with giant photo-induced enhancement. NANOSCALE 2023; 15:17398-17408. [PMID: 37796034 DOI: 10.1039/d3nr02791k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
Multifunctional self-powered energy harvesting devices have attracted significant attention for wearable, portable, IoT and healthcare devices. In this study, we report transition metal dichalcogenide (TMDC) ternary alloy (Mo0.5W0.5S2)-based self-powered photosensitive vertical triboelectric nanogenerator (TENG) devices, where the ternary alloy functions both as a triboelectric layer and as a photoabsorbing material. The scalable synthesis of the highly crystalline Mo0.5W0.5S2 ternary alloy can overcome the limitations of binary TMDCs (MoS2, WS2) by utilizing its superior optical characteristics, enabling this semiconductor-based TENG device to simultaneously exhibit photoelectric and triboelectric properties. Benefiting from visible light absorption, this vertical TENG device generates higher triboelectric outputs and exhibits excellent power harvesting properties under visible light illumination. The open circuit voltage and short circuit currents of the devices under illumination (410 nm, 525 μW cm-2) are enhanced by 62% and 253%, respectively, while in the darkness, a very high photoresponsivity of ∼45.5 V mW-1 (voltage mode) is exhibited, indicating the superior energy harvesting potential under ultralow illumination. Furthermore, the energy harvesting ability from regular human activities and the operation as artificial e-skin expands the multi-functionality of this TENG device, paving a pathway for simultaneous mechanical and photonic energy harvesting with self-powered sensing.
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Affiliation(s)
- Didhiti Bhattacharya
- S. N. Bose National Centre for Basic Science, Sector III, Block JD, Salt Lake, Kolkata - 700106, India
| | - Shubhrasish Mukherjee
- S. N. Bose National Centre for Basic Science, Sector III, Block JD, Salt Lake, Kolkata - 700106, India
| | - Rajib Kumar Mitra
- S. N. Bose National Centre for Basic Science, Sector III, Block JD, Salt Lake, Kolkata - 700106, India
| | - Samit Kumar Ray
- S. N. Bose National Centre for Basic Science, Sector III, Block JD, Salt Lake, Kolkata - 700106, India
- Indian Institute of Technology Kharagpur, 721302, India.
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Wang J, Zhou Y, Wang Z, Wang B, Li Y, Wu B, Hao C, Zhang Y, Zheng H. Piezo-phototronic effect regulated broadband photoresponse of a-Ga 2O 3/ZnO heterojunction. NANOSCALE 2023; 15:7068-7076. [PMID: 36974995 DOI: 10.1039/d3nr00744h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Amorphous Ga2O3 (a-Ga2O3) films have attracted considerable attention in the field of photodetectors due to their excellent optical absorption response and photoelectric properties. However, there are few studies that have utilized the piezo-phototronic effect to regulate the broadband photoresponse of Ga2O3-based photodetectors. Here, a flexible a-Ga2O3/ZnO heterojunction was constructed, which demonstrated a broadband response range from deep ultraviolet (265 nm) to the near-infrared (1060 nm) and realized a bidirectional adjustable photocurrent response via the piezo-phototronic effect. Under 265 nm illumination and 0.5 V bias, the responsivity and detectivity of the a-Ga2O3/ZnO heterojunction reached up to 12.19 A W-1 and 4.71 × 1011 Jones under 0.164% compressive strain, corresponding to enhancements of 67.7% and 66.8% compared to those under a strain-free state, respectively. Moreover, the broadband photoresponse of the a-Ga2O3/ZnO heterojunction beyond the bandgap limit was tunable under bidirectional strain. The working mechanism of photoresponse performance for the a-Ga2O3/ZnO heterojunction at different wavelengths was elucidated in detail. Oxygen vacancy-assisted carrier generation was found to be influenced by the wavelength of incident light, which mainly determined the broadband photoresponse of the heterojunction. The modulation of the a-Ga2O3/ZnO heterojunction photodetector was interpreted in light of the strain-induced regulation of the barrier height. This work represents an important step toward the development of adjustable broadband photodetectors based on a-Ga2O3 films.
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Affiliation(s)
- Jiantao Wang
- Henan Province Engineering Research Center of Smart Micro-nano Sensing Technology and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China.
| | - Yan Zhou
- Henan Province Engineering Research Center of Smart Micro-nano Sensing Technology and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China.
| | - Zihan Wang
- Henan Province Engineering Research Center of Smart Micro-nano Sensing Technology and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China.
| | - Boying Wang
- Henan Province Engineering Research Center of Smart Micro-nano Sensing Technology and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China.
| | - Yongqiu Li
- Henan Province Engineering Research Center of Smart Micro-nano Sensing Technology and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China.
| | - Banghao Wu
- Henan Province Engineering Research Center of Smart Micro-nano Sensing Technology and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China.
| | - Chunlin Hao
- Henan Province Engineering Research Center of Smart Micro-nano Sensing Technology and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China.
| | - Yaju Zhang
- Henan Province Engineering Research Center of Smart Micro-nano Sensing Technology and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China.
| | - Haiwu Zheng
- Henan Province Engineering Research Center of Smart Micro-nano Sensing Technology and Application, School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China.
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Sasmal A, Senthilnathan J, Arockiarajan A, Yoshimura M. Two-Dimensional Metal-Organic Framework Incorporated Highly Polar PVDF for Dielectric Energy Storage and Mechanical Energy Harvesting. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1098. [PMID: 36985992 PMCID: PMC10058605 DOI: 10.3390/nano13061098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 03/15/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
Here, we introduce a 2D metal-organic framework (MOF) into the poly(vinylidene fluoride) (PVDF) matrix, which has been comparatively less explored in this field. Highly 2D Ni-MOF has been synthesized in this regard via hydrothermal route and has been incorporated into PVDF matrix via solvent casting technique with ultralow filler (0.5 wt%) loading. The polar phase percentage of 0.5 wt% Ni-MOF loaded PVDF film (NPVDF) has been found to be increased to ~85% from a value of ~55% for neat PVDF. The ultralow filler loading has inhibited the easy breakdown path along with increased dielectric permittivity and hence has enhanced the energy storage performance. On the other hand, significantly enriched polarity and Young's Modulus has helped in improving its mechanical energy harvesting performance, thereby enhancing the human motion interactive sensing activities. The piezoelectric and piezo-tribo hybrid devices made up of NPVDF film have shown improved output power density of ~3.26 and 31 μW/cm2 compared to those of the piezoelectric and piezo-tribo hybrid devices comprising of neat PVDF (output power density ~0.6 and 17 μW/cm2, respectively). The developed composite can thus be considered an excellent candidate for multifunctional applications.
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Affiliation(s)
- Abhishek Sasmal
- Department of Applied Mechanics, Indian Institute of Technology Madras (IIT Madras), Chennai 600036, Tamil Nadu, India;
| | - Jaganathan Senthilnathan
- Department of Civil Engineering, Indian Institute of Technology Madras (IIT Madras), Chennai 600036, Tamil Nadu, India
| | - Arunachalakasi Arockiarajan
- Department of Applied Mechanics, Indian Institute of Technology Madras (IIT Madras), Chennai 600036, Tamil Nadu, India;
- Centre of Excellence in Ceramics Technologies for Futuristic Mobility, Indian Institute of Technology Madras (IIT Madras), Chennai 600036, Tamil Nadu, India
| | - Masahiro Yoshimura
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan
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Kashyap DK, Sharma C, Pappu A, Srivastava AK, Gupta MK. Extremely Reduced Dielectric Constant and Band Gap Enhancement in Few-Layered Tungsten Disulfide Nanosheets. J Phys Chem Lett 2022; 13:10267-10274. [PMID: 36302075 DOI: 10.1021/acs.jpclett.2c02558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Highly crystalline few-layered tungsten disulfide (WS2) nanosheets were synthesized via a cost-effective, low-temperature hydrothermal route. X-ray diffraction and HR-TEM analysis confirmed the formation of hexagonal nanosheets with thickness of ∼6-8 nm. Raman analysis and AFM results confirmed the few-layered 2H phase of WS2 nanosheets. The UV-vis study shows absorption peaks at 219 and 271 nm with large band gap value of ∼3.12 eV for WS2 nanosheets. Surprisingly, WS2 nanosheets show a dielectric constant of approximately ε' ≈ 5245, whereas bulk WS2 material exhibits a dielectric constant of 7482373. An almost 1426-fold decrease in the value of dielectric constant for the WS2 nanosheet is observed. Such an extreme reduction in dielectric constant and observance of large band gap in WS2 nanosheet were observed for the first time. The present study reveals the excellent and unusual optical and dielectric properties for their potential application in optoelectronic, dielectric, solar, phosphor, and various nanoelectronic devices.
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Affiliation(s)
- Deepak Kumar Kashyap
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh462026, India
| | - Charu Sharma
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh462026, India
| | - Asokan Pappu
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh462026, India
| | - Avanish Kumar Srivastava
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh462026, India
| | - Manoj Kumar Gupta
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh462026, India
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