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Dobromir M. Synthesis, Development and Characterization of Nanotubes. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13111762. [PMID: 37299665 DOI: 10.3390/nano13111762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 04/26/2023] [Accepted: 05/06/2023] [Indexed: 06/12/2023]
Abstract
In recent decades, the great demand for device miniaturization has attracted the attention of researchers focused on the growth, modification, properties, and applications of one-dimensional nanostructures, such as nanotubes [...].
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Affiliation(s)
- Marius Dobromir
- Department of Exact and Natural Sciences, Institute of Interdisciplinary Research, Alexandru Ioan Cuza University of Iasi, Blvd. Carol I, No. 11, 700506 Iasi, Romania
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Nikitina NA, Ryabkin DI, Suchkova VV, Kuksin AV, Pyankov ES, Ichkitidze LP, Maksimkin AV, Kitsyuk EP, Gerasimenko EA, Telyshev DV, Bobrinetskiy I, Selishchev SV, Gerasimenko AY. Laser-Formed Sensors with Electrically Conductive MWCNT Networks for Gesture Recognition Applications. MICROMACHINES 2023; 14:1106. [PMID: 37374691 DOI: 10.3390/mi14061106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/21/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023]
Abstract
Currently, an urgent need in the field of wearable electronics is the development of flexible sensors that can be attached to the human body to monitor various physiological indicators and movements. In this work, we propose a method for forming an electrically conductive network of multi-walled carbon nanotubes (MWCNT) in a matrix of silicone elastomer to make stretchable sensors sensitive to mechanical strain. The electrical conductivity and sensitivity characteristics of the sensor were improved by using laser exposure, through the effect of forming strong carbon nanotube (CNT) networks. The initial electrical resistance of the sensors obtained using laser technology was ~3 kOhm (in the absence of deformation) at a low concentration of nanotubes of 3 wt% in composition. For comparison, in a similar manufacturing process, but without laser exposure, the active material had significantly higher values of electrical resistance, which was ~19 kOhm in this case. The laser-fabricated sensors have a high tensile sensitivity (gauge factor ~10), linearity of >0.97, a low hysteresis of 2.4%, tensile strength of 963 kPa, and a fast strain response of 1 ms. The low Young's modulus values of ~47 kPa and the high electrical and sensitivity characteristics of the sensors made it possible to fabricate a smart gesture recognition sensor system based on them, with a recognition accuracy of ~94%. Data reading and visualization were performed using the developed electronic unit based on the ATXMEGA8E5-AU microcontroller and software. The obtained results open great prospects for the application of flexible CNT sensors in intelligent wearable devices (IWDs) for medical and industrial applications.
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Affiliation(s)
- Natalia A Nikitina
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Dmitry I Ryabkin
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Victoria V Suchkova
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Artem V Kuksin
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Evgeny S Pyankov
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Levan P Ichkitidze
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Aleksey V Maksimkin
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Evgeny P Kitsyuk
- Scientific-Manufacturing Complex "Technological Centre", Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
| | - Ekaterina A Gerasimenko
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Dmitry V Telyshev
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Ivan Bobrinetskiy
- Center for Probe Microscopy and Nanotechnology, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Sergey V Selishchev
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
| | - Alexander Yu Gerasimenko
- Institute of Biomedical Systems, National Research University of Electronic Technology, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
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Polokhin AA, Shaman YP, Itrin PA, Panyaev IS, Sysa AA, Selishchev SV, Kitsyuk EP, Pavlov AA, Gerasimenko AY. Tapered Optical Fiber Sensor Coated with Single-Walled Carbon Nanotubes for Dye Sensing Application. MICROMACHINES 2023; 14:579. [PMID: 36984998 PMCID: PMC10056110 DOI: 10.3390/mi14030579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 02/25/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
The present study aimed to improve the optical sensing performance of tapered optical fiber sensors toward aqueous Rhodamine B solution of different concentrations by applying single-walled carbon nanotubes (SWCNTs). The functional coating was formed on the surface of the tapered optical fiber sensor using an aerosol layer-by-layer deposition method. Before deposition, the SWCNTs were processed with multistage liquid-phase treatment in order to form a stable dispersion. The effect of SWCNT treatment was investigated through Raman spectroscopy. The deposition of 220 layers caused a reduction of up to 60% of the initial optical power of radiation propagating through the optical fiber core. The optical fiber sensor coated with SWCNTs demonstrated significantly higher sensitivity compared to a non-coated sensor in the range of 2-32 mg/L of Rhodamine B concentration in an aqueous solution. The experimental results demonstrated that the sensitivity was increased 10 times from 32 (mg/L)-1, for the non-coated sensor, up to 317 (mg/L)-1 after SWCNT coating deposition. Moreover, the SWCNT-coated sensor demonstrated high repeatability that allowed for the evaluation of the concentration regardless of the previously analyzed dye concentration.
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Affiliation(s)
- Aleksandr A. Polokhin
- Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia
| | - Yuri P. Shaman
- Scientific-Manufacturing Complex “Technological Centre”, Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
| | - Pavel A. Itrin
- S.P. Kapitsa Research and Technology Institute, Ulyanovsk State University, 42 Leo Tolstoy Str., 432017 Ulyanovsk, Russia
| | - Ivan S. Panyaev
- S.P. Kapitsa Research and Technology Institute, Ulyanovsk State University, 42 Leo Tolstoy Str., 432017 Ulyanovsk, Russia
| | - Artem A. Sysa
- Scientific-Manufacturing Complex “Technological Centre”, Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
| | - Sergey V. Selishchev
- Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia
| | - Evgeny P. Kitsyuk
- Scientific-Manufacturing Complex “Technological Centre”, Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
| | - Alexander A. Pavlov
- Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences, Leninsky Prospekt 32A, 119991 Moscow, Russia
| | - Alexander Yu. Gerasimenko
- Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
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Gerasimenko AY, Kuksin AV, Shaman YP, Kitsyuk EP, Fedorova YO, Murashko DT, Shamanaev AA, Eganova EM, Sysa AV, Savelyev MS, Telyshev DV, Pavlov AA, Glukhova OE. Hybrid Carbon Nanotubes-Graphene Nanostructures: Modeling, Formation, Characterization. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2812. [PMID: 36014677 PMCID: PMC9412346 DOI: 10.3390/nano12162812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/12/2022] [Accepted: 08/13/2022] [Indexed: 06/06/2023]
Abstract
A technology for the formation and bonding with a substrate of hybrid carbon nanostructures from single-walled carbon nanotubes (SWCNT) and reduced graphene oxide (rGO) by laser radiation is proposed. Molecular dynamics modeling by the real-time time-dependent density functional tight-binding (TD-DFTB) method made it possible to reveal the mechanism of field emission centers formation in carbon nanostructures layers. Laser radiation stimulates the formation of graphene-nanotube covalent contacts and also induces a dipole moment of hybrid nanostructures, which ensures their orientation along the force lines of the radiation field. The main mechanical and emission characteristics of the formed hybrid nanostructures were determined. By Raman spectroscopy, the effect of laser radiation energy on the defectiveness of all types of layers formed from nanostructures was determined. Laser exposure increased the hardness of all samples more than twice. Maximum hardness was obtained for hybrid nanostructure with a buffer layer (bl) of rGO and the main layer of SWCNT-rGO(bl)-SWCNT and was 54.4 GPa. In addition, the adhesion of rGO to the substrate and electron transport between the substrate and rGO(bl)-SWCNT increased. The rGO(bl)-SWCNT cathode with an area of ~1 mm2 showed a field emission current density of 562 mA/cm2 and stability for 9 h at a current of 1 mA. The developed technology for the formation of hybrid nanostructures can be used both to create high-performance and stable field emission cathodes and in other applications where nanomaterials coating with good adhesion, strength, and electrical conductivity is required.
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Affiliation(s)
- Alexander Yu. Gerasimenko
- Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Artem V. Kuksin
- Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia
| | - Yury P. Shaman
- Scientific-Manufacturing Complex “Technological Centre”, Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
- Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences, Leninsky Prospekt 32A, 119991 Moscow, Russia
| | - Evgeny P. Kitsyuk
- Scientific-Manufacturing Complex “Technological Centre”, Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
| | - Yulia O. Fedorova
- Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia
- Scientific-Manufacturing Complex “Technological Centre”, Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
| | - Denis T. Murashko
- Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia
| | - Artemiy A. Shamanaev
- Scientific-Manufacturing Complex “Technological Centre”, Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
| | - Elena M. Eganova
- Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences, Leninsky Prospekt 32A, 119991 Moscow, Russia
| | - Artem V. Sysa
- Scientific-Manufacturing Complex “Technological Centre”, Shokin Square 1, bld. 7 off. 7237, 124498 Moscow, Russia
| | - Mikhail S. Savelyev
- Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia
- Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Dmitry V. Telyshev
- Institute of Biomedical Systems, National Research University of Electronic Technology MIET, Shokin Square 1, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
| | - Alexander A. Pavlov
- Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences, Leninsky Prospekt 32A, 119991 Moscow, Russia
| | - Olga E. Glukhova
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119991 Moscow, Russia
- Department of Physics, Saratov State University, Astrakhanskaya Street 83, 410012 Saratov, Russia
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Lee SJ, Jung YJ, Park J, Jang SH. Temperature Detectable Surface Coating with Carbon Nanotube/Epoxy Composites. NANOMATERIALS 2022; 12:nano12142369. [PMID: 35889593 PMCID: PMC9324561 DOI: 10.3390/nano12142369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 07/04/2022] [Accepted: 07/07/2022] [Indexed: 12/04/2022]
Abstract
In the construction and machinery industry, heat is a major factor causing damage and destruction. The safety and efficiency of most machines and structures are greatly affected by temperature, and temperature management and control are essential. In this study, a carbon nanotube (CNT) based temperature sensing coating that can be applied to machines and structures having various structural types was fabricated, and characteristics analysis and temperature sensing performance were evaluated. The surface coating, which detects temperature through resistance change is made of a nanocomposite composed of carbon nanotubes (CNT) and epoxy (EP). We investigated the electrical properties by CNT concentration and temperature sensing performance of CNT/EP coating against static and cyclic temperatures. In addition, the applicability of the CNT/EP coating was investigated through a partially heating and cooling experiment. As a result of the experiment, the CNT/EP coating showed higher electrical conductivity as the CNT concentration increased. In addition, the CNT/EP coating exhibits high sensing performance in the high and sub−zero temperature ranges with a negative temperature coefficient of resistance. Therefore, the proposed CNT/EP coatings are promising for use as multi-functional coating materials for the detection of high and freezing temperatures.
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Affiliation(s)
- Seung-Jun Lee
- Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Korea;
| | - Yu-Jin Jung
- Department of Smart City Engineering, Hanyang University ERICA, Ansan 15588, Korea;
| | - JeeWoong Park
- Department of Civil and Environmental Engineering and Construction, The University of Nevada, Las Vegas, NV 89154, USA
- Correspondence: (J.P.); (S.-H.J.)
| | - Sung-Hwan Jang
- Department of Smart City Engineering, Hanyang University ERICA, Ansan 15588, Korea;
- Department of Civil and Environmental Engineering, Hanyang University ERICA, Ansan 15588, Korea
- Correspondence: (J.P.); (S.-H.J.)
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Gerasimenko AY, Morozova EA, Ryabkin DI, Fayzullin A, Tarasenko SV, Molodykh VV, Pyankov ES, Savelyev MS, Sorokina EA, Rogalsky AY, Shekhter A, Telyshev DV. Reconstruction of Soft Biological Tissues Using Laser Soldering Technology with Temperature Control and Biopolymer Nanocomposites. Bioengineering (Basel) 2022; 9:238. [PMID: 35735481 PMCID: PMC9219924 DOI: 10.3390/bioengineering9060238] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/23/2022] [Accepted: 05/25/2022] [Indexed: 11/17/2022] Open
Abstract
Laser soldering is a current biophotonic technique for the surgical recovery of the integrity of soft tissues. This technology involves the use of a device providing laser exposure to the cut edges of the wound with a solder applied. The proposed solder consisted of an aqueous dispersion of biopolymer albumin (25 wt.%), single-walled carbon nanotubes (0.1 wt.%) and exogenous indocyanine green chromophore (0.1 wt.%). Under laser exposure, the dispersion transforms into a nanocomposite due to the absorption of radiation and its conversion into heat. The nanocomposite is a frame structure of carbon nanotubes in a biopolymer matrix, which provides adhesion of the wound edges and the formation of a strong laser weld. A new laser device based on a diode laser (808 nm) has been developed to implement the method. The device has a temperature feedback system based on a bolometric infrared matrix sensor. The system determines the hottest area of the laser weld and adjusts the current supplied to the diode laser to maintain the preset laser heating temperature. The laser soldering technology made it possible to heal linear defects (cuts) in the skin of laboratory animals (rabbits) without the formation of a fibrotic scar compared to the control (suture material). The combined use of a biopolymer nanocomposite solder and a laser device made it possible to achieve a tensile strength of the laser welds of 4 ± 0.4 MPa. The results of the experiment demonstrated that the addition of single-walled carbon nanotubes to the solder composition leads to an increase in the ultimate tensile strength of the laser welds by 80%. The analysis of regenerative and morphological features in the early stages (1-3 days) after surgery revealed small wound gaps, a decrease in inflammation, the absence of microcirculatory disorders and an earlier epithelization of laser welds compared to the control. On the 10th day after the surgical operation, the laser weld was characterized by a thin cosmetic scar and a continuous epidermis covering the defect. An immunohistochemical analysis proved the absence of myofibroblasts in the area of the laser welds.
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Affiliation(s)
- Alexander Yu. Gerasimenko
- Institute of Biomedical Systems, National Research University of Electronic Technology, Shokin Square 1, Zelenograd, 124498 Moscow, Russia; (D.I.R.); (V.V.M.); (E.S.P.); (M.S.S.); (D.V.T.)
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119435 Moscow, Russia
| | - Elena A. Morozova
- Department of Oral Surgery of the Institute of Dentistry, I.M. Sechenov First Moscow State Medical Univesity, Bolshaya Pirogovskaya Street 2-4, 119435 Moscow, Russia; (E.A.M.); (S.V.T.); (E.A.S.)
| | - Dmitry I. Ryabkin
- Institute of Biomedical Systems, National Research University of Electronic Technology, Shokin Square 1, Zelenograd, 124498 Moscow, Russia; (D.I.R.); (V.V.M.); (E.S.P.); (M.S.S.); (D.V.T.)
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119435 Moscow, Russia
| | - Alexey Fayzullin
- Department of Experimental Morphology and Biobanking, Institute for Regenerative Medicine, I.M. Sechnov First Moscow State Medical University, Trubetskaya Street 8-2, 119991 Moscow, Russia; (A.F.); (A.S.)
- World-Class Research Center “Digital Biodesign and Personalized Healthcare”, I.M. Sechenov First Moscow State Medical University, Trubetskaya Street 8-2, 119991 Moscow, Russia
| | - Svetlana V. Tarasenko
- Department of Oral Surgery of the Institute of Dentistry, I.M. Sechenov First Moscow State Medical Univesity, Bolshaya Pirogovskaya Street 2-4, 119435 Moscow, Russia; (E.A.M.); (S.V.T.); (E.A.S.)
| | - Victoria V. Molodykh
- Institute of Biomedical Systems, National Research University of Electronic Technology, Shokin Square 1, Zelenograd, 124498 Moscow, Russia; (D.I.R.); (V.V.M.); (E.S.P.); (M.S.S.); (D.V.T.)
| | - Evgeny S. Pyankov
- Institute of Biomedical Systems, National Research University of Electronic Technology, Shokin Square 1, Zelenograd, 124498 Moscow, Russia; (D.I.R.); (V.V.M.); (E.S.P.); (M.S.S.); (D.V.T.)
| | - Mikhail S. Savelyev
- Institute of Biomedical Systems, National Research University of Electronic Technology, Shokin Square 1, Zelenograd, 124498 Moscow, Russia; (D.I.R.); (V.V.M.); (E.S.P.); (M.S.S.); (D.V.T.)
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119435 Moscow, Russia
| | - Elena A. Sorokina
- Department of Oral Surgery of the Institute of Dentistry, I.M. Sechenov First Moscow State Medical Univesity, Bolshaya Pirogovskaya Street 2-4, 119435 Moscow, Russia; (E.A.M.); (S.V.T.); (E.A.S.)
| | | | - Anatoly Shekhter
- Department of Experimental Morphology and Biobanking, Institute for Regenerative Medicine, I.M. Sechnov First Moscow State Medical University, Trubetskaya Street 8-2, 119991 Moscow, Russia; (A.F.); (A.S.)
| | - Dmitry V. Telyshev
- Institute of Biomedical Systems, National Research University of Electronic Technology, Shokin Square 1, Zelenograd, 124498 Moscow, Russia; (D.I.R.); (V.V.M.); (E.S.P.); (M.S.S.); (D.V.T.)
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya Street 2-4, 119435 Moscow, Russia
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Interfaces Based on Laser-Structured Arrays of Carbon Nanotubes with Albumin for Electrical Stimulation of Heart Cell Growth. Polymers (Basel) 2022; 14:polym14091866. [PMID: 35567036 PMCID: PMC9102927 DOI: 10.3390/polym14091866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/24/2022] [Accepted: 04/28/2022] [Indexed: 12/12/2022] Open
Abstract
Successful formation of electronic interfaces between living cells and electronic components requires both good cell viability and performance level. This paper presents a technology for the formation of nanostructured arrays of multi-walled carbon nanotubes (MWCNT) in biopolymer (albumin) layer for higher biocompatibility. The layer of liquid albumin dispersion was sprayed on synthesized MWCNT arrays by deposition system. These nanostructures were engineered using the nanosecond pulsed laser radiation mapping in the near-IR spectral range (λ = 1064 nm). It was determined that the energy density of 0.015 J/cm2 provided a sufficient structuring of MWCNT. The structuring effect occurred during the formation of C–C bonds simultaneously with the formation of a cellular structure of nanotubes in the albumin matrix. It led to a decrease in the nanotube defectiveness, which was observed during the Raman spectroscopy. In addition, laser structuring led to a more than twofold increase in the electrical conductivity of MWCNT arrays with albumin (215.8 ± 10 S/m). Successful electric stimulation of cells on the interfaces with the system based on a culture plate was performed, resulting in the enhanced cell proliferation. Overall, the MWCNT laser-structured arrays with biopolymers might be a promising material for extended biomedical applications.
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Slepchenkov MM, Glukhova OE. Electronic properties and behavior of carbon network based on graphene and single-walled carbon nanotubes in strong electrical fields: quantum molecular dynamics study. NANOTECHNOLOGY 2022; 33:285001. [PMID: 35390774 DOI: 10.1088/1361-6528/ac652a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 04/07/2022] [Indexed: 06/14/2023]
Abstract
Using the self-consistent-charge density-functional tight-binding method (SCC-DFTB) and extended lagrangian DFTB-based molecular dynamics, we performedin silicostudies of the behavior of graphene-nanotube hybrid structures that are part of a branched 3D carbon network in strong electrical fields. It has been established that strong fields with strength ranging from 5 to 10 V nm-1cause oscillating deformations of the atomic framework with a frequency in the range from 1.22 to 1.38 THz. It has been revealed that the oscillation frequency is determined primarily by the topology of the atomic framework of graphene-nanotube hybrid, while the electric field strength has an effect within 1%-2%. A further increase in electric field strength reduces the oscillation frequency to 0.7 THz, which accompanies the partial destruction of the atomic framework. The critical value of the electric field strength when the graphene is detached from the nanotube is ∼20 V nm-1.
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Affiliation(s)
| | - Olga E Glukhova
- Institute of Physics, Saratov State University, 410012 Saratov, Russia
- Laboratory of Biomedical Nanotechnology, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
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9
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Flexible Strain-Sensitive Silicone-CNT Sensor for Human Motion Detection. BIOENGINEERING (BASEL, SWITZERLAND) 2022; 9:bioengineering9010036. [PMID: 35049745 PMCID: PMC8772866 DOI: 10.3390/bioengineering9010036] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/02/2022] [Accepted: 01/10/2022] [Indexed: 12/12/2022]
Abstract
This article describes the manufacturing technology of biocompatible flexible strain-sensitive sensor based on Ecoflex silicone and multi-walled carbon nanotubes (MWCNT). The sensor demonstrates resistive behavior. Structural, electrical, and mechanical characteristics are compared. It is shown that laser radiation significantly reduces the resistance of the material. Through laser radiation, electrically conductive networks of MWCNT are formed in a silicone matrix. The developed sensor demonstrates highly sensitive characteristics: gauge factor at 100% elongation −4.9, gauge factor at 90° bending −0.9%/deg, stretchability up to 725%, tensile strength 0.7 MPa, modulus of elasticity at 100% 46 kPa, and the temperature coefficient of resistance in the range of 30–40 °C is −2 × 10−3. There is a linear sensor response (with 1 ms response time) with a low hysteresis of ≤3%. An electronic unit for reading and processing sensor signals based on the ATXMEGA8E5-AU microcontroller has been developed. The unit was set to operate the sensor in the range of electrical resistance 5–150 kOhm. The Bluetooth module made it possible to transfer the received data to a personal computer. Currently, in the field of wearable technologies and health monitoring, a vital need is the development of flexible sensors attached to the human body to track various indicators. By integrating the sensor with the joints of the human hand, effective movement sensing has been demonstrated.
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10
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Shi Q, Zhang G, Wang Y, Lan Y, Wang J, Cheng G. Research on the Response Characteristics of Vanadium Pentoxide Film to the Irradiation of Ultrafast Pulsed Laser. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2078. [PMID: 34443908 PMCID: PMC8401291 DOI: 10.3390/nano11082078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/06/2021] [Accepted: 08/12/2021] [Indexed: 01/02/2023]
Abstract
Vanadium pentoxide (V2O5) is the most stable phase among many transition metal vanadium oxides, and has already been widely used in many fields. In this study, the morphological, structural, and optical responses of V2O5 film to ultrafast laser irradiation was investigated. The third-order nonlinear optical properties of V2O5 film were measured by common Z-scan technique, and the results showed that V2O5 film has self-defocusing and saturable absorption characteristics. The third-order nonlinear absorption coefficient and nonlinear refractive index were calculated to be -338 cm/GW and -3.62 × 10-12 cm2/W, respectively. The tunable saturated absorption with modulation depth ranging from 13.8% to 29.3% was realized through controlling the thickness of vanadium pentoxide film. V2O5 film was irradiated by ultrafast laser with variable pulse energy, and the morphological and structural responses of the V2O5 to the laser with different energy densities were investigated. The irreversible morphological and structural responses of V2O5 films to ultrafast laser irradiation was analyzed using the phase-contrast microscope and Raman spectrum. The chemical structure change from V2O5 to V6O13 was considered the main reason for refractive index modification.
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Affiliation(s)
- Qianqian Shi
- State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China; (Q.S.); (Y.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guodong Zhang
- School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi’an 710072, China; (G.Z.); (J.W.)
| | - Yuheng Wang
- Research Center of Semiconductor Lighting and Information Engineering Technology, South China University of Technology, Guangzhou 510641, China;
| | - Yu Lan
- State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China; (Q.S.); (Y.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiang Wang
- School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi’an 710072, China; (G.Z.); (J.W.)
| | - Guanghua Cheng
- School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi’an 710072, China; (G.Z.); (J.W.)
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