Biological liquid crystalline polymers

Donald, Athene M.; Windle, Alan H.; Hanna, Simon

doi:10.1017/cbo9780511616044.009

Cited by 121 publications

(236 citation statements)

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“…Regardless of the well-established field of liquid crystals, including rigid hard-rods (inorganic liquid crystals), organic liquid crystals (LCs), and liquid-crystalline polymers (LCPs), [7][8][9] the renewed research interests in this field now focus on those specific 1D nanomaterials that are particularly important in the context of nanoscience and nanotechnology.…”

mentioning

confidence: 99%

“…[8,9] The dense texture does not appear to change noticeably in the liquid crystal cell for a long period of time (up to years if the cell is sealed properly) or during slow drying processing through water evaporation (either dried in the liquid crystal cells or cast films). Such a fine scale texture taxes the resolution limit of the optical microscope (of the order of 1 mm).…”

mentioning

confidence: 99%

“…[8,9,[20][21][22] Most wedge disclinations exist in topological strength AE1/2 ( Fig. 2) except Sample A with disclinations of integer strength (AE1) observed occasionally (Fig.…”

mentioning

confidence: 99%

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Size‐Dependence and Elasticity of Liquid‐Crystalline Multiwalled Carbon Nanotubes

Song¹,

Windle²

2008

Advanced Materials

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confidence: 99%

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confidence: 99%

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Size‐Dependence and Elasticity of Liquid‐Crystalline Multiwalled Carbon Nanotubes

Song¹,

Windle²

2008

Advanced Materials

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“…Electrochromic materials constitute a broad class of materials that range from liquid crystals to conducting polymers. 3,4 The choice of which material is most suitable will depend on the desired temporal response, spectral properties, long term stability and a host of practical issues (e.g., nonrecurring and recurring costs, ease of customization, etc. ).…”

Section: Introductionmentioning

confidence: 99%

Validation of near infrared spectroscopic (NIRS) imaging using programmable phantoms

et al. 2008

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For much of the past decade, we have developed most of the essential hardware and software components needed for practical implementation of dynamic NIRS imaging. Until recently, however, these efforts have been hampered by the lack of calibrating phantoms whose dynamics substantially mimic those seen in tissue. Here we present findings that document the performance of a dynamic phantom based on use of twisted nematic liquid crystal (LC) technology. Programmable time courses of applied voltage cause the opacity of the LC devices, which are embedded in a background matrix consisting of polysiloxane (silicone) admixed with scattering and absorbing materials, to vary in a manner that mimics the spatiotemporal hemodynamic pattern of interest. Methods for producing phantoms with selected absorption and scattering, internal heterogeneity, external geometry, hardness, and number and locations of embedded LCs are described. Also described is a method for overcoming the apparent limitation that arises from LCs being mainly independent of the illumination wavelength. The results presented demonstrate that: the opacity vs. voltage response of LCs are highly stable and repeatable; the dynamic phantom can be driven at physiologically relevant speeds, and will produce time-varying absorption that follows the programmed behavior with high fidelity; image time series recovered from measurements on the phantom have high temporal and spatial location accuracy. Thus the dynamic phantom can fill the need for test media that practitioners may use to confirm the accuracy of computed imaging results, assure the correct operation of imaging hardware, and compare performance of different data analysis algorithms.

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“…[4][5][6][7] Brienne et al 8 have described the formation of a liquid crystalline phase Liquid crystals and liquid crystalline polymers induced by association of complementary heterocyformed through covalent bonding have been exclic components to form a mesogenic supramolecutensively studied. 1 However, liquid crystalline lar species. (LC) materials formed through hydrogen bonding Liquid crystalline polymers also can be conassociation have only recently received much atstructed by hydrogen bond association.…”

Section: Introductionmentioning

confidence: 99%

Structure of a self-assembled hydrogen-bonded ?living? main chain liquid crystalline polymer

He¹,

Donald²,

Griffin

et al. 1998

J. Polym. Sci. B Polym. Phys.

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Biological liquid crystalline polymers

Cited by 121 publications

References 0 publications

Size‐Dependence and Elasticity of Liquid‐Crystalline Multiwalled Carbon Nanotubes

Size‐Dependence and Elasticity of Liquid‐Crystalline Multiwalled Carbon Nanotubes

Validation of near infrared spectroscopic (NIRS) imaging using programmable phantoms

Structure of a self-assembled hydrogen-bonded ?living? main chain liquid crystalline polymer

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