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Project titleNew generation of transparent, conductive, flexible and stretchable films of single-walled carbon nanotubes produced by aerosol CVD synthesis method

AffiliationAutonomous Non-Profit Organization for Higher Education "Skolkovo Institute of Science and Technology",

Research area 09 - ENGINEERING SCIENCES, 09-206 - Nano- and membranous technologies

KeywordsSingle-walled carbon nanotube films; SWCNT; flexible, transparent, stretchable, and conductive films; aerosol CVD; doping; field effect transistor

Annotation
The present project is devoted to the development of a new generation of thin transparent, flexible and stretchable conductive films and electronic devices based on the single-walled carbon nanotubes produced by the aerosol chemical vapor deposition (aerosol CVD) method. The key transparent electrode material, indium tin oxide (ITO), does not meet the requirements of the flexible electronics: it is brittle and possesses high refractive index and haze, spectrally non-uniform optical transmission, restricted chemical robustness, and limited indium supply facilitating demand on new materials for flexible electronics. Flexible, transparent, stretchable, and conductive films are of high demand by the electronics. Among other candidates, single-walled carbon nanotubes are the most promising material for such devices. A new generation of transparent and flexible transistors is another promising and even more important field of SWCNT film applications, since the characteristics of the field effect transistors are already comparable or superior to the existing transistors based on polycrystalline silicon. Aerosol CVD (floating catalyst) method allows synthesizing SWCNT of high quality and creating randomly oriented SWCNT films. However, the lack of knowledge on the SWCNT growth with tailored characteristics decreases the quality of resulting films. The formation of the contacts between metallic and semiconducting SWCNTs results in Schottky barriers increasing the sheet resistance of films, while a presence of the catalyst affects the optical properties of films. All existing methods of producing films of sorted semiconducting or metallic nanotubes require post-synthesis treatment, including the preparation of a solution and subsequent filtration. Features of the aerosol CVD method allow to obtain sorted SWCNT films directly during the synthesis, and the subsequent treatment doesn’t include a liquid phase. The goal of this project is to improve the performance of SWCNT films by the systematic investigation of the following issues: 1. Synthesis of SWCNTs with controlled distribution: a. Variation of the composition and structure of the catalyst for SWCNT growth. b. Decreasing the metallic SWCNT content by their selective functionalization. 2. Doping and functionalization of SWCNT to improve electronic properties of the films; 3. Ex situ elimination of catalyst from SWCNT films; 4. Orientation of SWCNTs during their deposition on the substrate. We expect the project to decrease the sheet resistance of the SWCNT films down to 20 Ω/□ at transmittance T=90 %. Such performance is comparable to the ITO properties and meets the requirements of commercial companies. We also expect to obtain the field effect transistors with the-state-of-art performance (the mobility ≥1 000 cm^2V^-1s^-1 and ION/IOFF ratio ≥10^6). Moreover, the special application of the obtained results to aerosol CVD technique will result in the scalable technology for the synthesis of state-of-the-art cost-efficient SWCNT films.

Expected results
Flexible electronics is one of hottest areas of Science and Technology that creates a great potential for the development of various passive and active components. Without denying the role of the architecture and design of the device interfaces, the main attention is paid to the materials used during development of flexible devices. Although a few approaches of the SWCNT production have achieved an industrial scale, some issues are still challenging: low yield of some methods, a broad distribution of SWCNT properties within the sample and through the market; the lack of the control on the complex nature of the production process. These problems are the severe barrier for the production of SWCNTs with tailored characteristics and for devices based on them. During the project, we will develop approaches to improve the properties of the produced SWCNT films. The following results will be obtained: 1. We will develop a highly productive technology for aerosol CVD synthesis of the SWCNTs and film fabrication; 2. We will study the intrinsic features of SWCNT synthesis affecting the structure of nanotubes. The methods towards the synthesis of SWCNTs with controlled (metallicity or even chirality) structure will be developed; 3. We will examine the doping conditions for SWCNT films to achieve the sheet resistance comparable to commercial conductive coatings. 4. We will develop a technique for production of films consisting of the aligned nanotubes with certain metallicity (metallic or semiconducting tubes). 5. On the basis of the SWCNT films with tailored characteristics, we will make the new generation of the transparent electrodes (20 Ω/□ at T=90%) for flexible electronics and field-effect transistor (the mobility ≥1 000 cm^2V^-1s^-1 and ION/IOFF ratio ≥10^6). It should be noted that this project is the interdisciplinary research related to various aspects of chemistry, physics, material science and engineering of SWCNT production. We will employ the top facilities to provide the measurements and data of high accuracy. The novel approaches will be developed during this project and will be compared, if possible, to the present techniques. This will allow us to obtain the-state-of-art results worthwhile publishing in top journals and to develop cutting edge technology for the SWCNT film production.

Annotation of the results obtained in 2019
During the third year of the project “New generation of transparent, conductive, flexible and stretchable films of single-walled carbon nanotubes produced by aerosol CVD synthesis method”, all key indicators promised both in the 2016 application and in the 2nd year report were fulfilled. In the framework of “Сonductive films of single-walled carbon nanotubes (SWCNTs) with a non- equilibrium chiral distribution”, the following results were demonstrated: 1. We are the first to show approaches to produce monodisperse catalytic particles in terms of composition (cluster approach; Co2Mo2O2(acac)2(OMe)10) and size (by pre-charging and dividing the polydisperse aerosol by a differential mobility analyzer). 2. For the first time, we employ machine learning methods to predict the results of synthesis (using artificial neural networks) and improved optimization (with support vector regression method) of the growth conditions of single-walled carbon nanotubes; the use of machine learning methods allowed us not only to produce representative sets of SWCNT samples with a controlled chiral distribution, but also to improve the main indicator of thin transparent electrodes based on SWCNT films - the equivalent sheet resistance (resistance of the film with transmittance of 90% at 550 nm) to 39 Ω/□. 3. Photoinduced adsorption of nitrogen monoxide on the surface of SWCNTs was discovered and studied; the NO adsorption was found to result in a decreased performance of SWCNT-based thin transparent electrodes. As a part of works to improve the optoelectronic characteristics of SWCNT films, a record value of equivalent surface resistance was obtained — 17 Ohm/□ using a “Rational design” approach. This value exceeds the parameters declared in the project (20 Ohm/□). The obtained result would not have been possible without systematic study both various doping compounds and different doping techniques. A wide range of doping compounds was investigated, which allowed us to find the best dopant for SWCNTs based on Au3+ – HAuCl4; Using of additional heat treatment (400 oC) of SWCNT films allowed to increasing the doping capacity of CNTs due to doping not only the external but also the inner surface of nanotubes. As a result, equivalent sheet resistance was obtained 30.1 ± 3.5 Ohm/sq. Additionally, a systematic analysis of various doping methods (Drop casting, Dip-coating, Spin coating, and aerosol method) was carried out. It was shown that, the greatest contribution in decrease of film resistance is observed using the Aerosol and Dip-coating approaches. Using one of the standard methods of coating - spin coating, does not allow to approach the indicators obtained for both Aerosol and Dip-coating techniques. Using the Dip-coating and the Aerosol technique allows to fine-tuning of electronic structure of SWCNTs. This opens a new avenue for traditional and flexible optoelectronics, both to replace existing. Also, during the 3rd year of the project, we developed an original technique for the gas-phase removal of catalyst residues by resistively-induced evaporation of iron in vacuum. On the one hand, the technique allows removing the metallic particles completely from the bulk of the SWCNT film, but it also leads to an increased defectiveness of the films and, as a result, reduced conductivity on the other. As part of the research on "the creation of field-effect transistors based on SWCNTs": 1. A new technology for the simple production of transistor arrays on a substrate with a high degree of distribution homogeneity has been developed; the technology is an improved adaptation of the classical “dry transfer” method for thin SWCNT films. More than 2500 transistors with low dispersion of properties were manufactured and measured using the proposed technology. 2. We created and characterized field effect transistors based on SWCNTs with characteristics (Ion Ion/Ioff ~4∙106, μ ~ 1500 cm2/V∙s) exceeding the declared ones (charge carrier mobility 1000 cm2/V∙s; on/off ratio >106).

Publications

1. Alexey P. Tsapenko, Stepan A. Romanov, Daria A. Satco, Dmitry V. Krasnikov, Pramod M. Rajanna, Mati Danilson, Olga Volobujeva, Anton S. Anisimov, Anastasia E. Goldt, Albert G. Nasibulin Aerosol-Assisted Fine-Tuning of Optoelectrical Properties of SWCNT Films The Journal of Physical Chemistry Letters, 10, 14, 3961 (year - 2019) https://doi.org/10.1021/acs.jpclett.9b01498

2. Aram A. Mkrtchyan, Yuriy G. Gladush, Diana Galiakhmetova, Vsevolod Yakovlev, Vadim T. Ahtyamov, Albert G. Nasibulin Dry-transfer technique for polymer-free single-walled carbon nanotube saturable absorber on a side polished fiber Optical Materials Express, 9, 4, 1551 (year - 2019) https://doi.org/10.1364/OME.9.001551

3. Daria Satco, Ahmad R. T. Nugraha, M. Shoufie Ukhtary, Daria Kopylova, Albert G. Nasibulin, Riichiro Saito Intersubband plasmon excitations in doped carbon nanotubes PHYSICAL REVIEW B, 99, 075403 (year - 2019) https://doi.org/10.1103/PhysRevB.99.075403

4. Daria Satco, Daria S. Kopylova, Fedor S. Fedorov, Tanja Kallio, Riichiro Saito, Albert G. Nasibulin Intersubband plasmon observation in electrochemically gated carbon nanotube films ACS Applied Electronic Materials, - (year - 2019)

5. Dmitry V. Krasnikov, Boris Yu. Zabelich, Vsevolod Ya. Iakovlev, Alexey P. Tsapenko, Stepan A. Romanov, Alena A. Alekseeva, Artem K. Grebenko, Albert G.Nasibulin A spark discharge generator for scalable aerosol CVD synthesis of single-walled carbon nanotubes with tailored characteristics Chemical Engineering Journal, 372, 2019 (year - 2019) https://doi.org/10.1016/j.cej.2019.04.173

6. Eldar M. Khabushev, Dmitry V. Krasnikov, Orysia T. Zaremba, Alexey P. Tsapenko, Anastasia E. Goldt, Albert G. Nasibulin Machine Learning for Tailoring Optoelectronic Properties of Single-Walled Carbon Nanotube Films JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 10, 21, 6962 (year - 2019) https://doi.org/10.1021/acs.jpclett.9b02777

7. Evgenia P. Gilshteyn, Stepan A. Romanov, Daria S. Kopylova, Georgy V. Savostyanov, Anton S. Anisimov, Olga E. Glukhova, Albert G. Nasibulin Mechanically Tunable Single-Walled Carbon Nanotube Films as a Universal Material for Transparent and Stretchable Electronics ACS APPLIED MATERIALS & INTERFACES, 11, 30, 27327 (year - 2019) https://doi.org/10.1021/acsami.9b07578

8. Maria A. Zhilyaeva, Eugene V. Shulga, Sergey D. Shandakov, Ivan V. Sergeichev, Evgenia P. Gilshteyn, Anton S. Anisimov, Albert G. Nasibulin A novel straightforward wet pulling technique to fabricate carbon nanotube fibers Carbon, 150, 69 (year - 2019) https://doi.org/10.1016/j.carbon.2019.04.111

9. Maria G. Burdanova, Alexey P. Tsapenko, Daria A. Satco, Reza Kashtiban, Connor D. W. Mosley, Maurizio Monti, Michael Staniforth, Jeremy Sloan, Yuriy G. Gladush, Albert G. Nasibulin, James Lloyd-Hughes Giant Negative Terahertz Photoconductivity in Controllably Doped Carbon Nanotube Networks ACS Photonics, 6, 4, 1058 (year - 2019) https://doi.org/10.1021/acsphotonics.9b00138

10. Orysia Zaremba, Anastasia Goldt, Maria Ramirez-Morales, Eldar M. Khabushev, Eugene Shulga, Timofei Eremin, Tatiana Prikazchikova, Anton Orekhov, Artem Grebenko, Timofei S. Zatsepin, Elena D. Obraztsova, Albert G. Nasibulin Robust technique for dispersion of single-walled carbon nanotubes in aqueous solutions with tRNA Carbon, 151, 175 (year - 2019) https://doi.org/10.1016/j.carbon.2019.05.076

11. Polina M.Kalachikova, Anastasia E.Goldt, Eldar M.Khabushev, Timofei V.Eremin, Konstantin B.Ustinovich, Artem Grebenko, Olga O.Parenago, Timofei S.Zatsepin, Oleg I.Pokrovskiy, Elena D.Obraztsova, Albert G.Nasibulin Direct injection of SWCNTs into liquid after supercritical nitrogen treatment Carbon, 152, 66 (year - 2019) https://doi.org/10.1016/j.carbon.2019.06.003

12. Pramod M. Rajanna, Hosni Meddeb, Oleg Sergeev, Alexey P. Tsapenko, Sergei Bereznev, Martin Vehse, Olga Volobujeva, Mati Danilson. Peter D. Lund, Albert G. Nasibulin Rational design of highly efficient flexible and transparent p-type composite electrode based on single-walled carbon nanotubes Nano Energy, 104183 (year - 2019) https://doi.org/10.1016/j.nanoen.2019.104183

13. Stepan A. Romanov, Ali E. Aliev, Boris V. Fine,Anton S. Anisimov, Albert G. Nasibulin Highly efficient thermophones based on freestanding single-walled carbon nanotube films NANOSCALE HORIZONS, 4, 1158 (year - 2019) https://doi.org/10.1039/c9nh00164f

14. V.M.Gubarev, V.Y.Yakovlev, M.G.Sertsu, O.F.Yakushev, V.M.Krivtsune, Yu.G.Gladush, I.A.Ostanin, A.Sokolov, F.Schäfers, V.V.Medvedev, A.G.Nasibulin Single-walled carbon nanotube membranes for optical applications in the extreme ultraviolet range Carbon, 155, 734 (year - 2019) https://doi.org/10.1016/j.carbon.2019.09.006

15. Vsevolod Ya.Iakovlev, Dmitry V.Krasnikov, Eldar M.Khabushev, Alena A.Alekseeva, Artem K.Grebenko, Alexey P.Tsapenko, Boris Yu.Zabelich, Julia V.Kolodiazhnaia, Albert G.Nasibulin Fine-tuning of spark-discharge aerosol CVD reactor for single-walled carbon nanotube growth: The role of ex situ nucleation Chemical Engineering Journal, 123073 (year - 2019) https://doi.org/10.1016/j.cej.2019.123073

16. Vsevolod YaIakovlev, Dmitry V.Krasnikov, Eldar M.Khabushev, Julia V.Kolodiazhnaia, Albert G.Nasibulin Artificial neural network for predictive synthesis of single-walled carbon nanotubes by aerosol CVD method Carbon, 153, 100 (year - 2019) https://doi.org/10.1016/j.carbon.2019.07.013

17. Yuriy Gladush, Aram A. Mkrtchyan, Daria S. Kopylova, Aleksey Ivanenko, Boris Nyushkov, Sergey Kobtsev, Alexey Kokhanovskiy, Alexander Khegai, Mikhail Melkumov, Maria Burdanova, Michael Staniforth, James Lloyd-Hughes, Albert G. Nasibulin Ionic Liquid Gated Carbon Nanotube Saturable Absorber for Switchable Pulse Generation Nano Letters, 19, 9, 5836 (year - 2019) https://doi.org/10.1021/acs.nanolett.9b01012

Annotation of the results obtained in 2017
During the first year of the implementation of the project "New generation of transparent, conductive, flexible and stretchable films of single-walled carbon nanotubes produced by aerosol CVD synthesis method", all the declared works were successfully completed. A major achievement of this year research was a record value of the equivalent sheet resistance (at the transmittance of 90% at 550 nm) for carbon nanotube films equal to 40 ohms/square, which confirmed a great potential of the material for the flexible and transparent electronics. The following results were obtained in 2017: 1. The aerosol CVD reactor for the single-walled carbon nanotube (SWCNT) synthesis based on the spark-discharge evaporation of a metal catalyst was designed and built. During the synthesis, the catalyst evaporated from the surface of the electrodes is delivered to the reaction zone by an inert gas (N2), where it is mixed with a carbon source (CO) and a catalyst activation promotor (CO2). At the reactor outlet, the SWCNTs in the form of aerosol were filtered through a nitrocellulose filter, on which a film of randomly oriented tubes was deposited. The film can be subsequently transferred by a dry transfer technique onto almost any substrate due to the low adhesion of the nanotubes to the filter material. This method allows to tune the diameter and chirality, and hence the optoelectrical properties of the obtained nanotube films by varying the composition and size of the catalyst particles, as well as the reaction conditions. These changes were demonstrated using a set of physical and chemical methods (differential mobility analyzer, ultraviolet-visible-infrared absorption spectroscopy, Raman spectroscopy, atomic force microscopy, and transmission and scanning electron microscopies). It was also shown that the chemical composition of the catalytic particles did not significantly affect the set of observed SWCNT chiralities, but affected the fraction of certain chiralities. We demonstrated the direct relation between the composition of the active catalytic particles and the type of the electrode. A nonequilibrium metallicity distribution of the aerosol synthesized nanotubes (the geometrical distribution of metallic and semiconductor nanotubes) was obtained and confirmed by AFM using a conducting probe and by the area ratio of the corresponding peaks in the optical spectra of the films. 2 According to the roadmap of the project, we explored the possibility of the orientation control of nanotubes by thermophoresis (the deposition of a SWCNT aerosol in a temperature gradient field). For this purpose, a specially designed thermophoretic cell was built. The cell consists of a hot zone (temperature was regulated by the resistive heating), the cold zone (the temperature was maintained by the circulation of water), and the quartz substrate onto which the nanotubes were deposited. We found the deposition efficiency in the thermophoretic cell to be affected by the aerosol flow and the temperature gradient. The obtained data allowed us to optimize the deposition conditions. SEM and optical polarization analysis of the SWCNT films revealed the orientation of individual carbon nanotubes. However, the degree of the SWCNT orientation is rather low (the degree of polarization is ca. 1.2%). Nevertheless, on the basis the obtained data, we found the limitations of the existing theoretical model to describe the thermophoretic deposition of SWCNT aerosol, and proposed a few approaches to significantly increase the orientation of the nanotubes within the films. The proposed optimization approaches are to be implemented in the second year of the project. In addition, it was shown that it was possible to obtain oriented SWCNT films at a nitrocellulose filter films by using a cellulose filter with heterogeneous spatial distribution of the pores. For this purpose, the degree of optical polarization of the nitrocellulose filter and the SWCNT films transferred from this filter to a transparent substrate was measured. It was found that the inhomogeneity of the filter affects the orientation of the deposited SWCNTs and the direction of polarization of the tubes coincides with the direction of polarization of the filter pores. The polarization for the filter and for the nanotube film was correspondingly 3.0 and 2.3%. 3. A number of organic and inorganic compounds of different concentrations in a set of solvents was evaluated for adsorption doping the outer surface of SWCNTs in order to improve their optoelectrical properties (conductance and transparency) and, thus, the quality of transparent electrodes based on SWCNT films. The quality is characterized by an equivalent sheet resistance (sheet resistance of a film with a transparency of 90% at the wavelength 550 nm). As a result of the research, a world record value of the equivalent sheet resistance for CNT films of 40 ohms / square was achieved. We have shown HAuCl4 as a dopant provides the highest quality for the transparent conductive electrodes. Also, the possibility of chirality selective functionalization of the SWCNT properties by doping was demonstrated. 4. In order to minimize the film transparency, we have studied removal of the catalyst residues from the transparent SWCNT films by their treatment in an aqueous media. The process was divided into two stages: opening the tubes by heating and removing/dissolving the catalyst particles. All the processes occurred during the annealing of the films at different temperatures were studied, and the optimum range was chosen (200 -350°C) to achieve the best removal of the catalyst without damaging the structure of the tubes. It was shown that the sequential treatment of the films with 30% solution of hydrogen peroxide and hydrochloric acid increased the transparency of the films by 9%, while the X-ray energy dispersive analysis shows the iron to be completely removed from the SWCNT films. The results obtained during the first year of the project implementation are in the agreement with the project time-schedule and allow us to expect a successful implementation of the works announced for 2018.

Publications

1. Karlsen P., Shuba M.V., Beckerleg C., Yuko D.I., Kuzhir P.P., Maksimenko S.A., Ksenevich V., Viet Ho, Nasibulin A.G., Tenne R., Hendry E. Influence of nanotube length and density on the plasmonic terahertz response of single-walled carbon nanotubes Journal of Physics D: Applied Physics, 51,1 (year - 2017) https://doi.org/10.1088/1361-6463/aa96ef

2. Varezhnikov A.S., Fedorov F.S., Burmistrov I.N., Plugin I.A., Sommer M., Lashkov A.V., Gorokhovsky A.V., Nasibulin A.G., Kuznecov D.V, Gorshenkov M.V., Sysoev V.V. The Room-Temperature Chemiresistive Properties of Potassium Titanate Whiskers versus Organic Vapors Nanomaterials, - (year - 2017)

3. Zhukova E.S., Grebenko A.K., Bubis A.V., Prokhorov A.S., Belyanchikov M.A., Tsapenko A.P., Gilshteyn E.P., Kopylova D.S., Gladush Y.G., Anisimov A.S., Anzin V.B., Nasibulin A.G., Gorshunov B.P. Terahertz-infrared electrodynamics of single-wall carbon nanotube films Nanotechnology, 28, 44, 445204 (year - 2017) https://doi.org/10.1088/1361-6528/aa87d1

Annotation of the results obtained in 2018
During the second year of the implementation of the project " New generation of transparent, conductive, flexible and stretchable films of single-walled carbon nanotubes produced by aerosol CVD synthesis method”, planned for 2017-2019, all the declared works have been successfully completed. As a result of the research, the record equivalent sheet resistance of carbon nanotube films of 30.1 ± 3.5 Ω/sq at 90 % transmittance at 550 nm has been achieved. In addition, transistors with an on/off current ratio of 10^6 and charge carrier mobility of 205 cm^2/(Vs) have been manufactured using sparse single-walled carbon nanotubes (SWCNT) network, which to the best of our knowledge corresponds to the best characteristics for such devices. Also, in 2018 the following results were achieved: 1. It is shown that introduction of titanium into iron electrodes, which are used to produce catalytic particles by a spark discharge in aerosol CVD synthesis of SWCNTs, does not lead to a limitation of certain tubes’ chiralities. 2. The possibility of a rapid and one-step selective oxidation of nanotubes during aerosol synthesis, which yields films enriched with semiconductor tubes, is demonstrated for the first time. Importantly, the process is characterized by extremely small process times of the order of 1–15 seconds, which makes it possible to use an equipment of relatively small overall dimensions. 3. Various methods and approaches to dope SWCNTs have been experimentally compared. Aerosol doping and dip-coating approaches have showed the largest decrease of the film resistance, while others, like one of the most widely used coating method, i.e. spin-coating, do not result in the similar values. The best result has been obtained when using dip-coating of the substrate with SWCNT film into 30 mM ethanol solution of HAuCl4 to be equal 45 Ohm / sq. Both methods (aerosol doping and dip-coating) have demonstrated high effectiveness. 4. Preheating technique has been applied to enable doping not only of the outer, but also of the inner surface of the tubes. This technique has allowed to obtain the record equivalent sheet resistance of the SWCNTs film to be 30.1 ± 3.5 Ω / sq when heated to 400 ° C. Filling the inner space of the tubes with gold is confirmed by TEM results. 5. The complete evaporation of the metal catalyst has been achieved by resistive heating of nanotube films in vacuum. This has significantly improved the optical transparency characteristics of the SWCNT films while maintaining the low defectiveness of the tubes and, therefore, their high conductivity. 6. We have developed approaches for fabrication of anisotropic SWCNT films by thermophoretic deposition, in which the tubes are oriented in the gas flow under the temperature gradient. It is shown that increase of the flow rate allows to significantly increase tubes’ degree of orientation. The polarization degree of thick films has been measured to reach 17%, while the use of thermophoresis allows to obtain transparent electrodes with large optical polarization degree (9% at 90% transmittance). 7. We have fabricated an array of field-effect transistors based on a sparse SWCNT network on a silicon substrate using optical lithography. According to the results of the characterization, the on/off ratio of 10^6 with carrier mobility of 205 cm^2V^-1 s^-1 has been achieved. The maximum mobility observed among all devices is ca. 1000 cm^2V^-1 s^-1. 8. A comparative analysis of polymers suited for rapid and non-destructive transfer of graphene from a copper substrate to the surface of SWCNT films has been carried out. The best polymer to use for graphene transfer (in order to protect SWCNT films from degradation) is acetylcellulose. 9. Results of the studies have been published in 6 peer-reviewed journals indexed in WoS and Scopus, along with 16 reports presented at Russian and International conferences, including 8 invited and plenary talks. The results obtained during the second year of the project implementation are in the agreement with the project time-schedule and allow us to expect a successful implementation of the works announced for 2019.

Publications

1. Afinogenov B.I., Kopylova D.S., Abrashitova K.A., Bessonov V.O.,Anisimov A.S., Dyakov S.A.,Gippius N.A., Gladush Yu.G., Fedyanin A.A., Nasibulin A.G. Midinfrared Surface Plasmons in Carbon Nanotube Plasmonic Metasurface Physical Review Applied, 9, 024027 (year - 2018) https://doi.org/10.1103/PhysRevApplied.9.024027

2. Aliev A.E., Codoluto D., Baughman R.H., Ovalle-Robles R., Inoue K., Romanov S.A., Nasibulin A.G., Kumar P., Priya S., Mayo N.K., Blottman J.B. Thermoacoustic Sound Projector: Exceeding the Fundamental Efficiency of Carbon Nanotubes Nanotechnology, 29, 32, 325704 (year - 2018) https://doi.org/10.1088/1361-6528/aac509

3. Gilshteyn E.P., Lin S., Kondrashov V.A., Kopylova D.S., Tsapenko A.P., Anisimov A.S., Hart A.J., Zhao X., Nasibulin A.G. A One-Step Method of Hydrogel Modification by Single-Walled Carbon Nanotubes for Highly Stretchable and Transparent Electronics ACS Applied Materials & Interfaces, 10, 33, 28069-28075 (year - 2018) https://doi.org/10.1021/acsami.8b08409

4. Iakovlev V.Ya., Sklyueva Yu.A., Fedorov F.S., Rupasov D.P., Kondrashov V.A., Grebenko A.K., Mikheev K.G., Gilmutdinov F.Z., Anisimov A.S., Mikheev G.M., Nasibulin A.G. Improvement of optoelectronic properties of single-walled carbon nanotube films by laser treatment Diamond & Related Materials, 88, 144-150 (year - 2018) https://doi.org/10.1016/j.diamond.2018.07.006

5. Kopylova D.S., Fedorov F.S., Alekseeva A.A., Gilshteyn E.P., Tsapenko A.P., Bubis A.V., Grebenko A.K., Popov Z.I., Sorokin P.B., Gladush Yu.G., Anisimov A.S., Nasibulin A.G. Holey single-walled carbon nanotubes for ultra-fast broadband bolometers Nanoscale, 10, 18665-18671 (year - 2018) https://doi.org/10.1039/c8nr05925j

6. Tsapenko A.P., Goldt A.E., Shulga E., Popov Z.I., Maslakov K.I., Anisimov A.S., Sorokin P.B., Nasibulin A.G. Highly conductive and transparent films of HAuCl4-doped single-walled carbon nanotubes for flexible applications Carbon, 130, 448-457 (year - 2018) https://doi.org/10.1016/j.carbon.2018.01.016