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Zhang M, Wen Y, Xie Z, Liu B, Sun F, An Z, Zhong Y, Feng Q, Zhao T, Mao Y. Wireless Sensing System Based on Biodegradable Triboelectric Nanogenerator for Evaluating Sports and Sleep Respiratory. Macromol Rapid Commun 2024:e2400151. [PMID: 38635599 DOI: 10.1002/marc.202400151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Revised: 04/15/2024] [Indexed: 04/20/2024]
Abstract
The rapid growth of the Internet of Things and wearable sensors has led to advancements in monitoring technology in the field of health. One such advancement is the development of wearable respiratory sensors, which offer a new approach to real-time respiratory monitoring compared to traditional methods. However, the energy consumption of these sensors raises concerns about environmental pollution. To address the issue, this study proposes the use of a triboelectric nanogenerator (TENG) as a sustainable energy source. The electrical conductivity of the TENG is improved by incorporating chitosan and carbon nanotubes, with the added benefit of chitosan's biodegradability reducing negative environmental impact. A wireless intelligent respiratory monitoring system (WIRMS) is then introduced, which utilizes a degradable triboelectric nanogenerator for real-time respiratory monitoring, diagnosis, and prevention of obstructive respiratory diseases. WIRMS offers stable and highly accurate respiratory information monitoring, while enabling real-time and nondestructive transmission of information. In addition, machine learning technology is used for sleep respiration state analysis. The potential applications of WIRMS extend to wearables, medical monitoring and sports monitoring, thereby presenting innovative ideas for modern medical and sports monitoring.
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Affiliation(s)
- Mengqi Zhang
- Physical Education Department, Northeastern University, Shenyang, 110819, China
| | - Yuzhang Wen
- Physical Education Department, Northeastern University, Shenyang, 110819, China
| | - Zhenning Xie
- Physical Education Department, Northeastern University, Shenyang, 110819, China
| | - Bing Liu
- Criminal Investigation Police University of China, Shenyang, 110035, China
| | - Fengxin Sun
- Physical Education Department, Northeastern University, Shenyang, 110819, China
| | - Zida An
- School of Mechanical Engineering and Automation, Northeastern University, Shenyang, 110819, China
| | - Ya Zhong
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Qingyang Feng
- Physical Education Department, Northeastern University, Shenyang, 110819, China
| | - Tianming Zhao
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Yupeng Mao
- Physical Education Department, Northeastern University, Shenyang, 110819, China
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2
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Nandeshwar R, Tallur S. Electrochemical detection of myeloperoxidase (MPO) in blood plasma with surface-modified electroless nickel immersion gold (ENIG) printed circuit board (PCB) electrodes. Biosens Bioelectron 2024; 246:115891. [PMID: 38056341 DOI: 10.1016/j.bios.2023.115891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 11/10/2023] [Accepted: 11/27/2023] [Indexed: 12/08/2023]
Abstract
Printed circuit board (PCB) based biosensors have often utilized hard gold electroplating, that nullifies the cost advantages of this technology as compared to screen printed electrodes. Electroless nickel immersion gold (ENIG) is a popular gold deposition process widely used in PCB manufacturing, but vulnerable to pinhole defects and large surface roughness, which compromises biosensor performance. In this work, we present a method to address these challenges through electrodeposition of methylene blue (MB) to cover surface defects and improve electroactivity of ENIG PCB electrodes. We also demonstrate a process to realize in situ synthesis of gold nanoparticles (AuNPs) using acid-functionalized multi-walled carbon nanotubes (MWCNTs) as scaffold, that are used to immobilize antibody for the target molecule (myeloperoxidase: MPO, early warning biomarker for cardiovascular diseases) through a modified cysteamine/gluteraldehyde based process. The processing steps on the electrode surface are developed in a manner that do not compromise the integrity of the electrode, resulting in repeatable and reliable performance of the sensors. Further, we demonstrate a cost-effective microfluidic packaging process to integrate a capillary pump driven microfluidic channel on the PCB electrode for seamless introduction of samples for testing. We demonstrate the ability of the sensor to distinguish clinically abnormal concentrations of MPO from normal concentrations through extensive characterization using spiked serum and blood plasma samples, with a limit of detection of 15.79 ng/mL.
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Affiliation(s)
- Ruchira Nandeshwar
- Department of Electrical Engineering, IIT Bombay, Mumbai, 400076, India.
| | - Siddharth Tallur
- Department of Electrical Engineering, IIT Bombay, Mumbai, 400076, India.
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3
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Saito N, Haniu H, Aoki K, Nishimura N, Uemura T. Future Prospects for Clinical Applications of Nanocarbons Focusing on Carbon Nanotubes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2201214. [PMID: 35754236 PMCID: PMC9404397 DOI: 10.1002/advs.202201214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 05/18/2022] [Indexed: 06/15/2023]
Abstract
Over the past 15 years, numerous studies have been conducted on the use of nanocarbons as biomaterials towards such applications as drug delivery systems, cancer therapy, and regenerative medicine. However, the clinical use of nanocarbons remains elusive, primarily due to short- and long-term safety concerns. It is essential that the biosafety of each therapeutic modality be demonstrated in logical and well-conducted experiments. Accordingly, the fundamental techniques for assessing nanocarbon biomaterial safety have become more advanced. Optimal controls are being established, nanocarbon dispersal techniques are being refined, the array of biokinetic evaluation methods has increased, and carcinogenicity examinations under strict conditions have been developed. The medical implementation of nanocarbons as a biomaterial is in sight. With a particular focus on carbon nanotubes, these perspectives aim to summarize the contributions to date on nanocarbon applications and biosafety, introduce the recent achievements in evaluation techniques, and clarify the future prospects and systematic introduction of carbon nanomaterials for clinical use through practical yet sophisticated assessment methods.
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Affiliation(s)
- Naoto Saito
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Hisao Haniu
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Kaoru Aoki
- Department of Applied Physical Therapy, Shinshu University School of Health Sciences, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Naoyuki Nishimura
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Takeshi Uemura
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
- Division of Gene Research, Research Center for Supports to Advanced Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
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4
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Design of 3D Carbon Nanotube Monoliths for Potential-Controlled Adsorption. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11209390] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The design of 3D monoliths provides a promising opportunity to scale the unique properties of singular carbon nanotubes to a macroscopic level. However, the synthesis of carbon nanotube monoliths is often characterized by complex procedures and additives impairing the later macroscopic properties. Here, we present a simple and efficient synthesis protocol leading to the formation of free-standing, stable, and highly conductive 3D carbon nanotube monoliths for later application in potential-controlled adsorption in aqueous systems. We synthesized monoliths displaying high tensile strength, excellent conductivity (up to 140 S m−1), and a large specific surface area (up to 177 m2 g−1). The resulting monoliths were studied as novel electrode materials for the reversible electrosorption of maleic acid. The process principle was investigated using chronoamperometry and cyclic voltammetry in a two-electrode setup. A stable electrochemical behavior was observed, and the synthesized monoliths displayed capacitive and faradaic current responses. At moderate applied overpotentials (± 500 mV vs. open circuit potential), the monolithic electrodes showed a high loading capacity (~20 µmol g−1) and reversible potential-triggered release of the analyte. Our results demonstrate that carbon nanotube monoliths can be used as novel electrode material to control the adsorption of small organic molecules onto charged surfaces.
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Glória J, Brito W, Gandarilla A, Larrude D, Carlos J, Araújo F, Almeida ME, Manzato L, Mariúba LAM. Solubilization, characterization, and protein coupling analysis to multiwalled carbon nanotubes. HIGH PERFORM POLYM 2020. [DOI: 10.1177/0954008320958035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Since their discovery, carbon nanotubes were used for numerous applications in the most diverse knowledge areas. However, the lack of solubility of these molecules in aqueous media compromises their beneficial properties for certain applications. Several methods to solubilize carbon nanotubes are described, however, depending on the intended application, the impact that the solubilization has on the physical and chemical properties needs to be considered. In the present study, a simple methodology is described that utilizes polyvinylpyrrolidone combined with sonication and centrifugation to solubilize multiwalled carbon nanotubes. Proteins were coupled to the surface of the solubilized products and characterized using various spectroscopic and electron microscopic techniques, evaluating the characteristics and integrity of the nanoparticle after the process. It was successfully demonstrated that nanotubes can be solubilized through a simple technique, without compromising their chemical characteristics, which makes them suitable materials for use in biomedical applications, due to their biocompatibility and lack of toxicity, among others.
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Affiliation(s)
- Juliane Glória
- Postgraduate Program in Biotechnology, Federal University of Amazonas (PPGBIOTEC-UFAM), Manaus, Amazonas, Brazil
| | - Walter Brito
- Department of Chemistry, Federal University of Amazonas, Manaus, Amazonas, Brazil
| | - Ariamna Gandarilla
- Department of Chemistry, Federal University of Amazonas, Manaus, Amazonas, Brazil
| | - Duniesky Larrude
- MackGraphe, Mackenzie Presbyterian University, São Paulo, Brazil
| | - Jacqueline Carlos
- Department of Chemistry, Federal University of Amazonas, Manaus, Amazonas, Brazil
| | - Felipe Araújo
- Leônidas and Maria Deane Institute, Oswaldo Cruz Foundation (ILMD-FIOCRUZ), Manaus, Amazonas, Brazil
| | - Maria Edilene Almeida
- Leônidas and Maria Deane Institute, Oswaldo Cruz Foundation (ILMD-FIOCRUZ), Manaus, Amazonas, Brazil
- Postgraduate Program Stricto sensu in Cellular and Molecular Biology of the Oswaldo Cruz Institute (PGBCM/IOC/Fiocruz), Rio de Janeiro, Brazil
| | - Lizandro Manzato
- Federal Institute of Amazonas (IFAM), Campus Manaus Distrito Industrial, Manaus, Amazonas, Brazil
| | - Luis André Morais Mariúba
- Postgraduate Program in Biotechnology, Federal University of Amazonas (PPGBIOTEC-UFAM), Manaus, Amazonas, Brazil
- Leônidas and Maria Deane Institute, Oswaldo Cruz Foundation (ILMD-FIOCRUZ), Manaus, Amazonas, Brazil
- Postgraduate Program Stricto sensu in Cellular and Molecular Biology of the Oswaldo Cruz Institute (PGBCM/IOC/Fiocruz), Rio de Janeiro, Brazil
- Postgraduate Program in Basic and Applied Immunology, Federal University of Amazonas (PPGIBA-UFAM), Manaus, Amazonas, Brazil
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Texter J, Crombez R, Maniglia R, Ma X, Arjunan Vasantha V, Manuelian M, Campbell R, Slater L, Mourey T. Imidazolium‐Based Stabilization of Aqueous Multiwall Carbon Nanotube Dispersions. J SURFACTANTS DETERG 2019. [DOI: 10.1002/jsde.12303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- John Texter
- Coatings Research Institute, School of Engineering TechnologyEastern Michigan University Ypsilanti Michigan 48197 USA
| | - Rene Crombez
- Coatings Research Institute, School of Engineering TechnologyEastern Michigan University Ypsilanti Michigan 48197 USA
| | - Rafael Maniglia
- Coatings Research Institute, School of Engineering TechnologyEastern Michigan University Ypsilanti Michigan 48197 USA
| | - Xiumin Ma
- Coatings Research Institute, School of Engineering TechnologyEastern Michigan University Ypsilanti Michigan 48197 USA
| | - Vivek Arjunan Vasantha
- Coatings Research Institute, School of Engineering TechnologyEastern Michigan University Ypsilanti Michigan 48197 USA
| | - Michael Manuelian
- Netzsch Instruments North America 37 North Avenue, Burlington Massachusetts 01803 USA
| | - Robert Campbell
- Netzsch Instruments North America 37 North Avenue, Burlington Massachusetts 01803 USA
| | - Lisa Slater
- Kodak Technology CenterEastman Kodak Company Rochester, New York, 14650‐2136 USA
| | - Thomas Mourey
- Kodak Technology CenterEastman Kodak Company Rochester, New York, 14650‐2136 USA
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7
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Wang AJ, Liao KS, Maharjan S, Zhu Z, McElhenny B, Bao J, Curran SA. Percolating conductive networks in multiwall carbon nanotube-filled polymeric nanocomposites: towards scalable high-conductivity applications of disordered systems. NANOSCALE 2019; 11:8565-8578. [PMID: 30990496 DOI: 10.1039/c9nr00216b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Disordered polymeric composite systems ordinarily exhibit poor bulk electronic transport properties, restricting their use to low-conductivity applications. In this work, highly electroconductive multi-walled carbon nanotube (MWCNT)/polyurethane (PU) nanocomposites were assembled via an aqueous solvent-blending method. Low percolation thresholds of 0.001 wt% and 0.093 wt% were obtained using pristine MWCNTs (P-MWCNTs) and mildly oxidized MWCNTs (O-MWCNTs), respectively. Corresponding critical values of dimensionality of 2.067 ± 0.094 and 2.304 ± 0.114 were calculated for P-MWCNT/PU and O-MWCNT/PU composites, respectively, strongly suggesting the formation of three-dimensional percolating conductive networks permeating the PU host matrix above the percolation threshold. Saturated direct current conductivities as high as 839 ± 72 S cm-1 were measured for O-MWCNT/PU composites at a filler-loading of 30.9 wt%. MWCNT/PU composite surfaces functionalized with superhydrophobic perfluoroalkyl moieties via chemical vapor deposition of (tridecafluoro-1,1,2,2-tetrahydrooctyl)trichlorosilane exhibited sessile contact angles as high as 154° without adversely affecting electroconductivity.
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Affiliation(s)
- Alexander J Wang
- Institute for NanoEnergy, Department of Physics, University of Houston, Science and Research Building 1, Houston, Texas 77204, USA.
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8
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Manzetti S, Gabriel JCP. Methods for dispersing carbon nanotubes for nanotechnology applications: liquid nanocrystals, suspensions, polyelectrolytes, colloids and organization control. INTERNATIONAL NANO LETTERS 2019. [DOI: 10.1007/s40089-018-0260-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Souza N, Roble M, Diaz-Droguett DE, Mücklich F. Scaling up single-wall carbon nanotube laser annealing: effect on electrical resistance and hydrogen adsorption. RSC Adv 2017. [DOI: 10.1039/c6ra27794b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Electrical resistance and hydrogen adsorption of laser-annealed single-wall carbon nanotube mats.
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Affiliation(s)
- Nicolas Souza
- Department of Materials Science
- Saarland University
- 66123 Saarbrücken
- Germany
| | - Martín Roble
- Instituto de Física
- Facultad de Física
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | | | - Frank Mücklich
- Department of Materials Science
- Saarland University
- 66123 Saarbrücken
- Germany
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10
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Kim DH, Puthumana J, Kang HM, Lee MC, Jeong CB, Han J, Hwang DS, Kim IC, Lee JW, Lee JS. Adverse effects of MWCNTs on life parameters, antioxidant systems, and activation of MAPK signaling pathways in the copepod Paracyclopina nana. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 179:115-124. [PMID: 27595654 DOI: 10.1016/j.aquatox.2016.08.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 08/22/2016] [Accepted: 08/24/2016] [Indexed: 06/06/2023]
Abstract
Engineered multi-walled carbon nanotubes (MWCNTs) have received widespread applications in a broad variety of commercial products due to low production cost. Despite their significant commercial applications, CNTs are being discharged to aquatic ecosystem, leading a threat to aquatic life. Thus, we investigated the adverse effect of CNTs on the marine copepod Paracyclopina nana. Additional to the study on the uptake of CNTs and acute toxicity, adverse effects on life parameters (e.g. growth, fecundity, and size) were analyzed in response to various concentrations of CNTs. Also, as a measurement of cellular damage, oxidative stress-related markers were examined in a time-dependent manner. Moreover, activation of redox-sensitive mitogen-activated protein kinase (MAPK) signaling pathways along with the phosphorylation pattern of extracellular signal-regulated kinase (ERK), p38, and c-Jun-N-terminal kinases (JNK) were analyzed to obtain a better understanding of molecular mechanism of oxidative stress-induced toxicity in the copepod P. nana. As a result, significant inhibition on life parameters and evoked antioxidant systems were observed without ROS induction. In addition, CNTs activated MAPK signaling pathway via ERK, suggesting that phosphorylated ERK (p-ERK)-mediated adverse effects are the primary cause of in vitro and in vivo endpoints in response to CNTs exposure. Moreover, ROS-independent activation of MAPK signaling pathway was observed. These findings will provide a better understanding of the mode of action of CNTs on the copepod P. nana at cellular and molecular level and insight on possible ecotoxicological implications in the marine environment.
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Affiliation(s)
- Duck-Hyun Kim
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Jayesh Puthumana
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Hye-Min Kang
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Min-Chul Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Chang-Bum Jeong
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Jeonghoon Han
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Dae-Sik Hwang
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Il-Chan Kim
- Division of Polar Life Sciences, Korea Polar Research Institute, Incheon 21990, South Korea
| | - Jin Wuk Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
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11
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Souza N, Zeiger M, Presser V, Mücklich F. In situ tracking of defect healing and purification of single-wall carbon nanotubes with laser radiation by time-resolved Raman spectroscopy. RSC Adv 2015. [DOI: 10.1039/c5ra09316c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Fine-tuned localised laser heating of pristine or mechanically dispersed (for composite processing) SWCNTs resulting in precision healing and purification.
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Affiliation(s)
- N. Souza
- Department of Materials Science
- Saarland University
- 66123 Saarbrücken
- Germany
| | - M. Zeiger
- Department of Materials Science
- Saarland University
- 66123 Saarbrücken
- Germany
- INM – Leibniz Institute for New Materials & Department of Materials Science
| | - V. Presser
- Department of Materials Science
- Saarland University
- 66123 Saarbrücken
- Germany
- INM – Leibniz Institute for New Materials & Department of Materials Science
| | - F. Mücklich
- Department of Materials Science
- Saarland University
- 66123 Saarbrücken
- Germany
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12
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Jeong HT, Kim BC, Gorkin R, Higgins MJ, Wallace GG. Capacitive behavior of latex/single-wall carbon nanotube stretchable electrodes. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.05.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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14
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Maiti UN, Lee WJ, Lee JM, Oh Y, Kim JY, Kim JE, Shim J, Han TH, Kim SO. 25th anniversary article: Chemically modified/doped carbon nanotubes & graphene for optimized nanostructures & nanodevices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:40-66. [PMID: 24123343 DOI: 10.1002/adma.201303265] [Citation(s) in RCA: 231] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Indexed: 05/25/2023]
Abstract
Outstanding pristine properties of carbon nanotubes and graphene have limited the scope for real-life applications without precise controllability of the material structures and properties. This invited article to celebrate the 25th anniversary of Advanced Materials reviews the current research status in the chemical modification/doping of carbon nanotubes and graphene and their relevant applications with optimized structures and properties. A broad aspect of specific correlations between chemical modification/doping schemes of the graphitic carbons with their novel tunable material properties is summarized. An overview of the practical benefits from chemical modification/doping, including the controllability of electronic energy level, charge carrier density, surface energy and surface reactivity for diverse advanced applications is presented, namely flexible electronics/optoelectronics, energy conversion/storage, nanocomposites, and environmental remediation, with a particular emphasis on their optimized interfacial structures and properties. Future research direction is also proposed to surpass existing technological bottlenecks and realize idealized graphitic carbon applications.
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Affiliation(s)
- Uday Narayan Maiti
- Center for Nanomaterials and Chemical Reactions Institute for Basic Science, (IBS), Department of Materials Science & Engineering, KAIST, Daejeon, 305-701, Republic of Korea
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15
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Lee W, Cho YJ, Choi HR, Park HJ, Chang T, Park M, Lee H. Elution behavior of shortened multiwalled carbon nanotubes in size exclusion chromatography. J Sep Sci 2012; 35:3250-6. [DOI: 10.1002/jssc.201200489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 08/02/2012] [Accepted: 08/02/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Wonmok Lee
- Department of Chemistry; Sejong University; Gunja-Dong, Gwangjin-Gu; Seoul; Korea
| | - Young Jin Cho
- Department of Chemistry; Sejong University; Gunja-Dong, Gwangjin-Gu; Seoul; Korea
| | - Heung Ryul Choi
- Department of Chemistry and Division of Advanced Materials Science; Pohang University of Science and Technology (POSTECH); Pohang; Korea
| | - Hye Jin Park
- Hybrid Materials Center; Korea Institute of Science and Technology; Seongbuk-gu; Seoul; Korea
| | - Taihyun Chang
- Department of Chemistry and Division of Advanced Materials Science; Pohang University of Science and Technology (POSTECH); Pohang; Korea
| | - Min Park
- Hybrid Materials Center; Korea Institute of Science and Technology; Seongbuk-gu; Seoul; Korea
| | - Hyunjung Lee
- School of Advanced Materials Engineering; Kookmin University; Jeongneung-Dong; Seoul; Korea
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16
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Dye-sensitized solar cells based on multiwalled carbon nanotube–titania/titania bilayer structure photoelectrode. J Colloid Interface Sci 2011; 358:562-6. [DOI: 10.1016/j.jcis.2011.03.031] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 02/16/2011] [Accepted: 03/09/2011] [Indexed: 11/20/2022]
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17
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Xu J, Yao P, Liu L, Jiang Z, He F, Li M, Zou J. Synthesis and characterization of an organic soluble and conducting polyaniline-grafted multiwalled carbon nanotube core-shell nanocomposites by emulsion polymerization. J Appl Polym Sci 2010. [DOI: 10.1002/app.32581] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Chen G, Shin DH, Kim S, Roth S, Lee CJ. Improved field emission stability of thin multiwalled carbon nanotube emitters. NANOTECHNOLOGY 2010; 21:015704. [PMID: 19946155 DOI: 10.1088/0957-4484/21/1/015704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The improved field emission stability of thin multiwalled carbon nanotube (thin-MWCNT) emitters using a tip sonication process has been investigated. The thin-MWCNTs showed short lengths and many open tips after the tip sonication treatment. The field emission properties of the thin-MWCNT emitters were investigated. Field emission stability dramatically increased as the tip sonication time increased. In particular, field emission current at an acceleration condition was quite stable and showed no degradation for over 19 h after tip sonication treatment of 30 min. Tip sonication could effectively cut CNTs short and regulate the length of CNTs. Therefore, field emission stability was significantly improved during a long period of operation because many shortened thin-MWCNTs could participate in field emission after the treatment.
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Affiliation(s)
- Guohai Chen
- School of Electrical Engineering, Korea University, Seoul 136-713, Korea
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