Interaction of a bi-molecular liquid crystal film with functionalized nanoparticles

Taylor, Jefferson W.; Kurihara, Lynn K.; Martı́nez-Miranda, L. J.

doi:10.1063/1.3703605

Cited by 16 publications

(14 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SmA phase is a higher temperature phase and hence has more thermal disorder associated with it. The liquid crystal aligns with the nanoparticle in the I30 phase in a planar arrangement, and creates a defect structure around the nanoparticle which propagates into the sample 26,48 . The more disordered phase results in a variation in the I30 liquid crystal phase (see Figure 5.b) of the high d-peak if compared with the M30 liquid crystal phase, where the high d-peak remains more or less constant (see Figure 5.a).…”

Section: Resultsmentioning

confidence: 99%

Smectogenic liquid crystals and nanoparticles: an approach for potential application in photovoltaics

et al. 2015

Self Cite

View full text Add to dashboard Cite

Artículo de publicación ISISin acceso a texto completoWe synthesized monomeric liquid crystals, M6R8 and I6R8, and nanoparticles of TiO2, to form a nanocomposite, which was characterized by polarized optical microscopy (POM), DSC and structurally by both wide angle X-ray diffraction and X-ray scattering using the planar geometry. The transition temperatures of the nanocomposites did not vary greatly with the concentration of TiO2. The alignment quality increases as the concentration of TiO2 increases from 7 to 30 wt% as can be observed using polarized microscopy and confirmed by the results of the X-ray scattering experiment. The alignment was not as good for I6R8, since in this case the liquid crystals attach to the nanoparticle just through the hydrogen bonding of the hydroxyl group in the aromatic cores. In the case of M6R8 an additional electrostatic interaction is present through the methacrylic groups which enhance the alignment. Although M6R8 shows better optical alignment, I6R8 presents a higher conductivity. This is because of the higher electron delocalization in the aromatic cores, where the nanoparticles are linked.Conicyt 21090713 21130413 Fondecyt 113018

show abstract

Section: Resultsmentioning

confidence: 99%

Smectogenic liquid crystals and nanoparticles: an approach for potential application in photovoltaics

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…In such produced composite states, the liquid crystal serves as a matrix with ability to impose its inherent high ordering to the bulk ordering of the mixture. Carbon nanotubes are among the most used as doping agent in the liquid crystal matrix [5][6][7]. The goal of the present work is to create both symmetric and non-symmetric supramolecular liquid crystals complexes, nanocomposites, where the dimeric nOBA liquid crystal serves like matrix.…”

Section: Introductionmentioning

confidence: 99%

The unique physical properties of the hydrogen bonded in dimers liquid crystals

Petrov¹,

Katranchev²,

Rafailov

2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The unique physical properties of the hydrogen bonded in dimers liquid crystals Abstract. The dimerization of aromatic carboxylic acids, is the base of the structure formation of hydrogen bonded in dimers liquid crystals (HBDLCs), that exhibit non-conventional mesomorphism. The structural units of these LCs are amphiphilic-type molecules, which after suitable functionalization, induce supramolecular complexes, nanocomposites based on HBDLCs. The liquid crystalline character of the nanocomposites strongly dependent on intermolecular hydrogen bonds between symmetric, where the H-donors and H acceptors are contained in similar and non-symmetric HBDLCs, where the H-donors and H acceptors are contained in unlike molecules. The strength and non-covalent character of the hydrogen bonds provides both sufficient HBDLCs complex stability and bonding flexibility with a possibility to design and drive the supramolecular geometry. We investigated a series of nanocomposites produced by mixture of HBDLC (p-n-alkyloxybenzoic acid -nOBA), serving as matrices, with non-mesogenic (single walled carbon nanotubes -SWCNTs, hydroxypiridine -HOPY) and mesogenic (cholesteryl benzoate -ChB) nano-particles in various shapes and sizes. A set of new chiral ferroelectric phases were found in the nanocomposites, otherwise do not appearing in the pristine achiral HBDLCs materials. A molecular model of an unique low-temperature ferroelectric smectic phase C based on the molecular dimer ring symmetry reduction (bent dimer formation) towards to the lowest triclinic one is presented for both symmetric and nonsymmetric supramolecular liquid crystal complexes.

show abstract

“…Specifically, we have studied nanocomposites consisting of smectic liquid crystals and nanoparticles for their applications in devices such as photovoltaics 8,9 and to model biological devices. 10 Composites consisting of a mixture of nanoparticles and ordered liquid crystals have been considered for bioengineering applications, 10−14 for membrane fabrication, 15,16 drug delivery, 15−17 photovoltaic, 8,9,18−22 photonic, 23−26 and metamaterials. 6,27 As mentioned before, these nanocomposites also serve as a model for the interfacial interactions of bilayer systems with nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Structure of a Liquid Crystal/Nanoparticle Nanocomposite Studied by X-ray Scattering: Indirect Evidence for the Role of Faceting of the Nanoparticles

2015

Self Cite

View full text Add to dashboard Cite

The interfacial structure in a liquid crystal/nanoparticle nanocomposite is dictated by the type of nanoparticle and its functionalization compound. Nanocomposites consisting of smectic liquid crystals and nanoparticles have been studied for their applications in devices such as photovoltaics and to model biological devices. With the use of a model system, this paper presents evidence of an interfacial structure close to the vicinity of the nanoparticles that is more disordered than that of the bulk liquid crystal but is still in the smectic phase, and it seems to follow the faceting of the structure the nanoparticles adopt when they coalesce or recluster after the liquid crystal is added.

show abstract

Interaction of a bi-molecular liquid crystal film with functionalized nanoparticles

Cited by 16 publications

References 21 publications

Smectogenic liquid crystals and nanoparticles: an approach for potential application in photovoltaics

Smectogenic liquid crystals and nanoparticles: an approach for potential application in photovoltaics

The unique physical properties of the hydrogen bonded in dimers liquid crystals

Interfacial Structure of a Liquid Crystal/Nanoparticle Nanocomposite Studied by X-ray Scattering: Indirect Evidence for the Role of Faceting of the Nanoparticles

Contact Info

Product

Resources

About