NEW WAY TO CREATE HIGH-SPEED LCD’S BASED ON THE USE OF MODIFIED NANOMATERIALS
The object of research is liquid crystal materials of the nematic and smectic types containing modified nanoparticles of detonation diamonds, partially reduced graphene and nanoclay. The purpose of the work is the development of new functional materials with improved physicochemical and electro-opti...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
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Educational institution «Belarusian State University of Informatics and Radioelectronics»
2019-12-01
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| Series: | Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki |
| Subjects: | |
| Online Access: | https://doklady.bsuir.by/jour/article/view/2018 |
| _version_ | 1797880984501223424 |
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| author | V. I. Lapanik A. P. Lugovsky S. N. Timofeev |
| author_facet | V. I. Lapanik A. P. Lugovsky S. N. Timofeev |
| author_sort | V. I. Lapanik |
| collection | DOAJ |
| description | The object of research is liquid crystal materials of the nematic and smectic types containing modified nanoparticles of detonation diamonds, partially reduced graphene and nanoclay. The purpose of the work is the development of new functional materials with improved physicochemical and electro-optical characteristics. During the study, methods for chemical modification of the surface of nanoparticles were developed; the mesomorphic, dielectric and electro-optical properties of nematic and ferroelectric compositions, doped with modified nanomaterials are studied. It has been established that the effect of modified nanodiamonds on the mesomorphic, dielectric, and electro-optical properties of liquid crystals is large and depends on the size of these particles and the type of grafted functional groups. Small-sized diamond nanoparticles do not significantly affect the properties of liquid crystals. At the same time, conglomerates based on nanodiamonds with a diameter of about 50–100 nm can increase or decrease the dielectric anisotropy and the response time of liquid crystals by 1,5–2,5 times, depending on the polarity of the functional groups. It has been experimentally shown that the addition of a small amount of graphene flakes to nematic and ferroelectric liquid crystals can significantly improve the electro-optical response time (up to 2 times depending on concentration). There is a decrease in threshold (by 7–30 %) and saturation voltages (by 11–31 %). For ferroelectric liquid crystals, the addition of graphene leads to an increase in the tilt angle and a spontaneous polarization. |
| first_indexed | 2024-04-10T03:12:55Z |
| format | Article |
| id | doaj.art-f9a60bf865a44ce69a315a1a4cc1a67e |
| institution | Directory Open Access Journal |
| issn | 1729-7648 |
| language | Russian |
| last_indexed | 2024-04-10T03:12:55Z |
| publishDate | 2019-12-01 |
| publisher | Educational institution «Belarusian State University of Informatics and Radioelectronics» |
| record_format | Article |
| series | Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki |
| spelling | doaj.art-f9a60bf865a44ce69a315a1a4cc1a67e2023-03-13T07:33:20ZrusEducational institution «Belarusian State University of Informatics and Radioelectronics»Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki1729-76482019-12-0107 (125)32381238NEW WAY TO CREATE HIGH-SPEED LCD’S BASED ON THE USE OF MODIFIED NANOMATERIALSV. I. Lapanik0A. P. Lugovsky1S. N. Timofeev2A. N. Sevchenko Institute of Applied Physical Problems of Belarusian State UniversityA. N. Sevchenko Institute of Applied Physical Problems of Belarusian State UniversityA. N. Sevchenko Institute of Applied Physical Problems of Belarusian State UniversityThe object of research is liquid crystal materials of the nematic and smectic types containing modified nanoparticles of detonation diamonds, partially reduced graphene and nanoclay. The purpose of the work is the development of new functional materials with improved physicochemical and electro-optical characteristics. During the study, methods for chemical modification of the surface of nanoparticles were developed; the mesomorphic, dielectric and electro-optical properties of nematic and ferroelectric compositions, doped with modified nanomaterials are studied. It has been established that the effect of modified nanodiamonds on the mesomorphic, dielectric, and electro-optical properties of liquid crystals is large and depends on the size of these particles and the type of grafted functional groups. Small-sized diamond nanoparticles do not significantly affect the properties of liquid crystals. At the same time, conglomerates based on nanodiamonds with a diameter of about 50–100 nm can increase or decrease the dielectric anisotropy and the response time of liquid crystals by 1,5–2,5 times, depending on the polarity of the functional groups. It has been experimentally shown that the addition of a small amount of graphene flakes to nematic and ferroelectric liquid crystals can significantly improve the electro-optical response time (up to 2 times depending on concentration). There is a decrease in threshold (by 7–30 %) and saturation voltages (by 11–31 %). For ferroelectric liquid crystals, the addition of graphene leads to an increase in the tilt angle and a spontaneous polarization.https://doklady.bsuir.by/jour/article/view/2018liquid crystal compositesdielectric constantelectro-optical parametersdetonation nanodiamondsgraphenenanoclay |
| spellingShingle | V. I. Lapanik A. P. Lugovsky S. N. Timofeev NEW WAY TO CREATE HIGH-SPEED LCD’S BASED ON THE USE OF MODIFIED NANOMATERIALS Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki liquid crystal composites dielectric constant electro-optical parameters detonation nanodiamonds graphene nanoclay |
| title | NEW WAY TO CREATE HIGH-SPEED LCD’S BASED ON THE USE OF MODIFIED NANOMATERIALS |
| title_full | NEW WAY TO CREATE HIGH-SPEED LCD’S BASED ON THE USE OF MODIFIED NANOMATERIALS |
| title_fullStr | NEW WAY TO CREATE HIGH-SPEED LCD’S BASED ON THE USE OF MODIFIED NANOMATERIALS |
| title_full_unstemmed | NEW WAY TO CREATE HIGH-SPEED LCD’S BASED ON THE USE OF MODIFIED NANOMATERIALS |
| title_short | NEW WAY TO CREATE HIGH-SPEED LCD’S BASED ON THE USE OF MODIFIED NANOMATERIALS |
| title_sort | new way to create high speed lcd s based on the use of modified nanomaterials |
| topic | liquid crystal composites dielectric constant electro-optical parameters detonation nanodiamonds graphene nanoclay |
| url | https://doklady.bsuir.by/jour/article/view/2018 |
| work_keys_str_mv | AT vilapanik newwaytocreatehighspeedlcdsbasedontheuseofmodifiednanomaterials AT aplugovsky newwaytocreatehighspeedlcdsbasedontheuseofmodifiednanomaterials AT sntimofeev newwaytocreatehighspeedlcdsbasedontheuseofmodifiednanomaterials |