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Liquid crystal microcapillary-based sensors for affordable analytical applications
Date
2022-04-01
Author
Kurt, Elif
Büküşoğlu, Emre
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URI
https://hdl.handle.net/11511/97621
Journal
SOFT MATTER
DOI
https://doi.org/10.1039/d2sm00131d
Collections
Department of Chemical Engineering, Article
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Liquid crystal-based microcapillary sensors
Kurt, Elif; Büküşoğlu, Emre; Department of Chemical Engineering (2022-1-21)
Stimuli-responsive properties of liquid crystals (LCs), when combined with their optical properties, offer sensitive and rapid sensing applications. In the first part of this thesis study, we propose and demonstrate a microcapillary-based method to be applied for the online detection of amphiphilic species, which can be further used for biological and chemical species in aqueous media. Specifically, we used compartments (300-1400 µm) of nematic 4-cyano-4’-pentylbiphenyl (5CB) that is positioned into cylindr...
Liquid Crystal-Templated Synthesis of Anisotropic Ultrafiltration Membranes
Karausta, Aslı; Büküşoğlu, Emre (2018-08-30)
In this study, we developed a method that provides determination ofthe internal structure of the polymeric films by using LCs as template. For thesynthesis of the material, we photopolymerized the mixture of reactive(4-(3-acryloyoxypropyloxy) benzoic acid 2-methyl-1,4-phenylene ester (RM257))and non-reactive (4-cyano-4′-pentylbiphenyl (5CB)) mesogens confined in filmgeometries with thickness of 20-200 µm, and then extracted nonreactive mesogenswith solvent to yield polymeric films of area in the order of 10...
Liquid Crystal-Templated Synthesis of Mesoporous Membranes with Predetermined Pore Alignment
Karausta, Asli; Büküşoğlu, Emre (American Chemical Society (ACS), 2018-10-03)
We demonstrate that polymeric films templated from liquid crystals (LCs) provide basic design principles for the synthesis of mesoporous films with predetermined pore alignment. Specifically, we used LC mixtures of reactive [4-(3-acryloyoxypropyloxy) benzoic acid 2-methyl-1,4-phenylene ester (RM257)] and nonreactive [4-cyano-4'-pentylbiphenyl (5CB)] mesogens confined in film geometries. The LC alignment was maintained by functionalization of the surfaces contacting the films during polymerization. Through p...
Liquid Crystal Templates Combined with Photolithography Enable Synthesis of Chiral Twisted Polymeric Microparticles
AKDENİZ, BURAK; Büküşoğlu, Emre (Wiley, 2019-08-01)
Liquid crystals (LC), when combined with photolithography, enable synthesis of microparticles with 2D and 3D shapes and internal complexities. Films of nematic LCs are prepared using mixtures of reactive (RM257) and non-reactive mesogens with controlled alignment of LCs at the confining surfaces, photo-polymerized the RM257 using a photomask, and then extracted the unreacted mesogens to yield the polymeric microparticles. The extraction results in a controlled anisotropic shrinkage amount dependent on the R...
Liquid crystal-templated synthesis of polymeric microparticles with complex nanostructures
Akdeniz, Burak; Büküşoğlu, Emre; Department of Chemical Engineering (2019)
Liquid crystals (LC), when combined with photolithography, enable synthesis of microparticles with two- and three-dimensional shapes and internal complexities. We prepared films of nematic LCs using mixtures of reactive (RM257) and non-reactive mesogens (E7) with controlled alignment of LCs at the confining surfaces, photopolymerized the RM257 using a photomask, and then extracted the unreacted mesogens to yield polymeric microparticles. The extraction resulted in a controlled anisotropic shrinkage with an ...
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E. Kurt and E. Büküşoğlu, “Liquid crystal microcapillary-based sensors for affordable analytical applications,”
SOFT MATTER
, vol. 18, pp. 4009–4016, 2022, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/97621.