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dc.contributor.authorSoon, C.F.*
dc.contributor.authorTee, K.S.*
dc.contributor.authorYouseffi, Mansour*
dc.contributor.authorDenyer, Morgan C.T.*
dc.date.accessioned2019-04-02T11:24:23Z
dc.date.available2019-04-02T11:24:23Z
dc.date.issued2015-09
dc.identifier.citationSoon CF, Tee KS, Youseffi M et al (2015) Comparison of two different indentation techniques in studying the in-situ viscoelasticity behaviour of liquid crystals. ARPN Journal of Engineering and Applied Sciences. 10(17): 7309-7315.en_US
dc.identifier.urihttp://hdl.handle.net/10454/16945
dc.descriptionYesen_US
dc.description.abstractLiquid crystal is a new emerging biomaterial. The physical property of liquid crystal plays a role in supporting the adhesion of cells. Nano and microball indentation techniques were applied to determine the elastic modulus or viscoelasticity of the cholesteryl ester liquid crystals in the culture media. Nano-indentation results (108 ± 19.78 kPa, N = 20) agreed well with the microball indentation (110 ± 19.95 kPa, N = 60) for the liquid crystal samples incubated for 24 hours at 37o C, respectively. However, nanoindentation could not measure the modulus of the liquid crystal (LC) incubated more than 24 hours. This is due to the decreased viscosity of the liquid crystal after immersion in the cell culture media for more than 24 hours. Alternatively, microball indentation was used and the elastic modulus of the LC immersed for 48 hours was found to decrease to 55 ± 9.99 kPa (N = 60). The microball indentation indicated that the LC did not creep after 40 seconds of indentation. However, the elastic modulus of the LC was no longer measurable after 72 hours of incubation due to the lost of elasticity. Microball indentation seemed to be a reliable technique in determining the elastic moduli of the cholesteryl ester liquid crystals.en_US
dc.description.sponsorshipScience Fund Vot. No. S024 or Project No. 02- 01-13-SF0104 and FRGS Vot. No. 1482 awarded by Malaysia Ministry of Educationen_US
dc.language.isoenen_US
dc.subjectNanoindentationen_US
dc.subjectMicroball indentationen_US
dc.subjectLiquid crystalen_US
dc.subjectIn-situen_US
dc.subjectElastic modulusen_US
dc.subjectViscoelasticityen_US
dc.titleComparison of two different indentation techniques in studying the in-situ viscoelasticity behavior of liquid crystalsen_US
dc.status.refereedYesen_US
dc.date.application2015-09
dc.typeArticleen_US
dc.type.versionPublished versionen_US
refterms.dateFOA2019-04-02T11:24:23Z
dc.relation.urlhttp://www.arpnjournals.com/jeas/volume_17_2015.htm


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