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Gong T, Li ZN, Liang H, Li Y, Tang X, Chen F, Hu Q, Wang H. High-Sensitivity Wearable Sensor Based On a MXene Nanochannel Self-Adhesive Hydrogel. ACS APPLIED MATERIALS & INTERFACES 2023; 15:19349-19361. [PMID: 37036936 DOI: 10.1021/acsami.3c01748] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
To address the shortcomings of traditional filler-based wearable hydrogels, a new type of nanochannel hydrogel sensor is fabricated in this work through a combination of the unique structure of electrospun fiber textile and the properties of a double network hydrogel. Unlike the traditional Ti3C2Tx MXene-based hydrogels, the continuously distributed Ti3C2Tx MXene in the nanochannels of the hydrogel forms a tightly interconnected structure similar to the neuron network. As a result, they have more free space to flip and perform micromovements, which allows one to significantly increase the electrical conductivity and sensitivity of the hydrogel. According to the findings, the Ti3C2Tx MXene nanochannel hydrogel has excellent mechanical properties as well as self-adhesion and antifreezing characteristics. The hydrogel sensor successfully detects different human motions and physiological signals (e.g., low pulse signals) with high stability and sensitivity. Therefore, the proposed Ti3C2Tx MXene-based hydrogel with a unique structure and properties is very promising in the field of flexible wearable devices.
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Affiliation(s)
- Tao Gong
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Zo Ngyang Li
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Huanyi Liang
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Youming Li
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Xia Tang
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Fengyue Chen
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Qinghua Hu
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - HongQing Wang
- College of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
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Novel Rubber Composites Based on Copper Particles, Multi-Wall Carbon Nanotubes and Their Hybrid for Stretchable Devices. Polymers (Basel) 2022; 14:polym14183744. [PMID: 36145889 PMCID: PMC9505250 DOI: 10.3390/polym14183744] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/31/2022] [Accepted: 09/04/2022] [Indexed: 02/07/2023] Open
Abstract
New technologies are constantly addressed in the scientific community for updating novel stretchable devices, such as flexible electronics, electronic packaging, and piezo-electric energy-harvesting devices. The device promoted in the present work was found to generate promising ~6V and durability of >0.4 million cycles. This stretchable device was based on rubber composites. These rubber composites were developed by solution mixing of room temperature silicone rubber (RTV-SR) and nanofiller, such as multi-wall carbon nanotube (MWCNT) and micron-sized copper particles and their hybrid. The hybrid composite consists of 50:50 of both fillers. The mechanical stretchability and compressive modulus of the composites were studied in detail. For example, the compressive modulus was 1.82 MPa (virgin) and increased at 3 per hundred parts of rubber (phr) to 3.75 MPa (MWCNT), 2.2 MPa (copper particles) and 2.75 MPa (hybrid). Similarly, the stretching ability for the composites used in fabricating devices was 148% (virgin) and changes at 3 phr to 144% (MWCNT), 230% (copper particles) and 199% (hybrid). Hence, the hybrid composite was found suitable with optimum stiffness and robust stretching ability to be useful for stretching electronic devices explored in this work. These improved properties were tested for a real-time stretchable device, such as a piezoelectric energy-harvesting device and their improved voltage output and durability were reported. In the end, a series of experiments conducted were summarized and a discussion on the best candidate with higher properties useful for prospective applications was reported.
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Li C, Zhu J, Du W, Huang Y, Xu H, Zhai Z, Zou G. The Photodetectors Based on Lateral Monolayer MoS 2/WS 2 Heterojunctions. NANOSCALE RESEARCH LETTERS 2021; 16:123. [PMID: 34331611 PMCID: PMC8325733 DOI: 10.1186/s11671-021-03581-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Monolayer transition metal dichalcogenides (TMDs) show promising potential for next-generation optoelectronics due to excellent light capturing and photodetection capabilities. Photodetectors, as important components of sensing, imaging and communication systems, are able to perceive and convert optical signals to electrical signals. Herein, the large-area and high-quality lateral monolayer MoS2/WS2 heterojunctions were synthesized via the one-step liquid-phase chemical vapor deposition approach. Systematic characterization measurements have verified good uniformity and sharp interfaces of the channel materials. As a result, the photodetectors enhanced by the photogating effect can deliver competitive performance, including responsivity of ~ 567.6 A/W and detectivity of ~ 7.17 × 1011 Jones. In addition, the 1/f noise obtained from the current power spectrum is not conductive to the development of photodetectors, which is considered as originating from charge carrier trapping/detrapping. Therefore, this work may contribute to efficient optoelectronic devices based on lateral monolayer TMD heterostructures.
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Affiliation(s)
- Caihong Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, People's Republic of China
| | - Juntong Zhu
- the College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, People's Republic of China
| | - Wen Du
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, People's Republic of China
| | - Yixuan Huang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, People's Republic of China
| | - Hao Xu
- School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, People's Republic of China.
- the State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, People's Republic of China.
| | - Zhengang Zhai
- the 36th Research Institute of China Electronics Technology Group Corporation, Jiaxing, 314033, People's Republic of China
| | - Guifu Zou
- the College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, People's Republic of China.
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Krisnadi F, Nguyen LL, Ma J, Kulkarni MR, Mathews N, Dickey MD. Directed Assembly of Liquid Metal-Elastomer Conductors for Stretchable and Self-Healing Electronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001642. [PMID: 32567064 DOI: 10.1002/adma.202001642] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 05/07/2020] [Indexed: 06/11/2023]
Abstract
Growing interest in soft robotics, stretchable electronics, and electronic skins has created demand for soft, compliant, and stretchable electrodes and interconnects. Here, dielectrophoresis (DEP) is used to assemble, align, and sinter eutectic gallium indium (EGaIn) microdroplets in uncured poly(dimethylsiloxane) (PDMS) to form electrically conducting microwires. There are several noteworthy aspects of this approach. 1) Generally, EGaIn droplets in silicone at loadings approaching 90 wt% remain insulating and form a conductive network only when subjected to sintering. Here, DEP facilitates assembly of EGaIn droplets into conductive microwires at loadings as low as 10 wt%. 2) DEP is done in silicone for the first time, enabling the microwires to be cured in a stretchable matrix. 3) Liquid EGaIn droplets sinter during DEP to form a stretchable metallic microwire that retains its shape after curing the silicone. 4) Use of liquid metal eliminates the issue of compliance mismatch observed in soft polymers with solid fillers. 5) The silicone-EGaIn "ink" can be assembled by DEP within the crevices of severely damaged wires to create stretchable interconnects that heal the damage mechanically and electrically. The DEP process of this unique set of materials is characterized and the interesting attributes enabled by such liquid microwires are demonstrated.
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Affiliation(s)
- Febby Krisnadi
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Ave, #01-30, Block N4.1, Singapore, 639798, Singapore
| | - Linh Lan Nguyen
- Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Jinwoo Ma
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Engineering Building I, 911 Partners Way, Raleigh, NC, 27606, USA
| | - Mohit Rameshchandra Kulkarni
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Ave, #01-30, Block N4.1, Singapore, 639798, Singapore
| | - Nripan Mathews
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Ave, #01-30, Block N4.1, Singapore, 639798, Singapore
- Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, 50 Nanyang Drive, X-Frontiers Block, Level 5, Singapore, 637553, Singapore
| | - Michael D Dickey
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Engineering Building I, 911 Partners Way, Raleigh, NC, 27606, USA
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Bulk soldering: Conductive polymer composites filled with copper particles and solder. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.06.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Amoabeng D, Velankar SS. A review of conductive polymer composites filled with low melting point metal alloys. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24774] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Derrick Amoabeng
- Dept. of Chemical and Petroleum EngineeringUniversity of PittsburghPittsburgh Pennsylvania 15261
| | - Sachin S. Velankar
- Dept. of Chemical and Petroleum EngineeringUniversity of PittsburghPittsburgh Pennsylvania 15261
- Dept. of Mechanical Engineering and Material ScienceUniversity of PittsburghPittsburgh Pennsylvania 15261
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Yang Q, Beers MH, Zheng M, Lloyd R, Gao T, Parkinson D. In situ
electrical resistance and X-ray tomography study of copper-tin polymer composites during thermal annealing. J Appl Polym Sci 2017. [DOI: 10.1002/app.45399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Qing Yang
- Advanced Light Source, Lawrence Berkeley National Laboratory; Berkeley California 94720
| | | | - Min Zheng
- TE Connectivity Corporation; Fremont California 94555
| | - Richard Lloyd
- TE Connectivity Corporation; Fremont California 94555
| | - Ting Gao
- TE Connectivity Corporation; Fremont California 94555
| | - Dilworth Parkinson
- Advanced Light Source, Lawrence Berkeley National Laboratory; Berkeley California 94720
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