Dynamical behaviour of phase transitions in liquid crystals under ultrasound field
The study investigates the influence of an acoustic field on the process of interface formation, phase boundary propagation kinetics, and isotropic phase nucleation in a nematic liquid crystal (NLC) during the NLC → isotropic liquid (IL) phase transition. Experimental studies were conducted using ac...
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| Veröffentlicht in: | Journal of physics. Conference series 2023-11, Vol.2657 (1), p.12011 |
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| creator | Bezhanova, L S Vasilyan, M S Atanesyan, A K |
| description | The study investigates the influence of an acoustic field on the process of interface formation, phase boundary propagation kinetics, and isotropic phase nucleation in a nematic liquid crystal (NLC) during the NLC → isotropic liquid (IL) phase transition. Experimental studies were conducted using acoustically "rigid" drops and both "rigid" and "soft" cells of sandwich type, with one substrate being a piezo quartz’s X-cut plate. The thickness of the investigated LC layers with planar and homotropic orientations was 20, 50, and 100 μm. The frequency of the ultrasonic field ranged from 3.77 to 4 MHz. Additionally, we computed the values of isotropic germ’s radius in NLC during the NLC → IL phase transition both without and under the ultrasonic field. The obtained data indicate an increased probability of forming a germ of an isotropic phase during the NLC → IL phase transition under the influence of ultrasound. These findings align well with the experimentally observed trends in the changes of phase transition temperature, specifically with the depression of the NLC → IL phase transition temperature in the presence of an ultrasound field. |
| doi_str_mv | 10.1088/1742-6596/2657/1/012011 |
| format | Article |
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Experimental studies were conducted using acoustically "rigid" drops and both "rigid" and "soft" cells of sandwich type, with one substrate being a piezo quartz’s X-cut plate. The thickness of the investigated LC layers with planar and homotropic orientations was 20, 50, and 100 μm. The frequency of the ultrasonic field ranged from 3.77 to 4 MHz. Additionally, we computed the values of isotropic germ’s radius in NLC during the NLC → IL phase transition both without and under the ultrasonic field. The obtained data indicate an increased probability of forming a germ of an isotropic phase during the NLC → IL phase transition under the influence of ultrasound. 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These findings align well with the experimentally observed trends in the changes of phase transition temperature, specifically with the depression of the NLC → IL phase transition temperature in the presence of an ultrasound field.</description><subject>Liquid crystals</subject><subject>Nematic crystals</subject><subject>Nucleation</subject><subject>Phase transitions</subject><subject>Physics</subject><subject>Sound fields</subject><subject>Substrates</subject><subject>Transition temperature</subject><subject>Ultrasonic imaging</subject><issn>1742-6588</issn><issn>1742-6596</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqFkNtKxDAQhosouK4-gwHvhNpM0zTppaxnFhQP1yFtEjZLt-0mrbBvb0plRRCcm5lh_n9m-KLoHPAVYM4TYFka57TIkzSnLIEEQ4oBDqLZfnK4rzk_jk68X2NMQrBZ9Hqza-TGVrJGpV7JT9sODrUGdSvpNeqdbLztbdt4ZBtU2-1gFarczvey9mholHZoqIPMt6FBxupanUZHJkz12XeeRx93t--Lh3j5fP-4uF7GVcoyiGVaYlMQjbVSmaIKMg6UVwQ0qAx4VjJWFkwbzCmU1JCcUlwwUhDOTM4oI_PoYtrbuXY7aN-LdXi-CSdFWuCUAuF5EVRsUlWu9d5pIzpnN9LtBGAxAhQjGjFiEiNAAWICGJxkctq2-1n9v-vyD9fTy-Ltt1B0ypAv-qt_nA</recordid><startdate>20231101</startdate><enddate>20231101</enddate><creator>Bezhanova, L S</creator><creator>Vasilyan, M S</creator><creator>Atanesyan, A K</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>H8D</scope><scope>HCIFZ</scope><scope>L7M</scope><scope>P5Z</scope><scope>P62</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope></search><sort><creationdate>20231101</creationdate><title>Dynamical behaviour of phase transitions in liquid crystals under ultrasound field</title><author>Bezhanova, L S ; Vasilyan, M S ; Atanesyan, A K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2741-a2b0f93e0edd4d5d148158c31e1d4184b77b97ef0851b5f365509739387f67573</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Liquid crystals</topic><topic>Nematic crystals</topic><topic>Nucleation</topic><topic>Phase transitions</topic><topic>Physics</topic><topic>Sound fields</topic><topic>Substrates</topic><topic>Transition temperature</topic><topic>Ultrasonic imaging</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bezhanova, L S</creatorcontrib><creatorcontrib>Vasilyan, M S</creatorcontrib><creatorcontrib>Atanesyan, A K</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Aerospace Database</collection><collection>SciTech Premium Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>Journal of physics. 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| subjects | Liquid crystals Nematic crystals Nucleation Phase transitions Physics Sound fields Substrates Transition temperature Ultrasonic imaging |
| title | Dynamical behaviour of phase transitions in liquid crystals under ultrasound field |
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