Control of anisotropic self-assembly of gold nanoparticles coated with mesogens

Mang, Xiaobin; Zeng, Xiangbing; Tang, Bai-Jia; Liu, Feng; Ungar, Goran; Zhang, Ruibin; Cseh, Liliana; Mehl, Georg H.

doi:10.1039/c2jm16794h

Cited by 44 publications

(56 citation statements)

References 34 publications

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“…The mesophase was virtually isotropic and nonbirefringent. The GISAX pattern and the electron density map are shown in Figure 7.27h,i and the schematic unit cell in Figure 7.10d [77]. The distances between the GNPs in the directions parallel and normal to the hexagonal axis were virtually the same, consistent with the lack of optical anisotropy.…”

Section: Nanoparticle-and Fullerene-containing 3d Phasessupporting

confidence: 51%

“…This is the first reported ''close-packed'' micellar structure reported in thermotropic LCs. The reason for the lack of nematic order of the mesogens and for the overall lack of anisotropy given here was the combination of the effects of dilution of the nematogen by the long coligand and the relatively small aspect ratio of the mesogen 38 [77]. Interestingly, when the longer mesogen 39 was similarly ''diluted'' by the dodecylthiol coligand, the anisotropic rhombohedral phase was obtained, as described earlier.…”

Section: Nanoparticle-and Fullerene-containing 3d Phasesmentioning

confidence: 75%

“…(d) Threedimensional LC phases based on gold nanoparticles jacketed with side-on attached rodlike mesogens: rhombohedral R3m [76], simple hexagonal P6/mmm [77], and cubic Fm3m (FCC) [77]. Different shades of gray of the spheres indicate crystallographically nonequivalent objects.…”

Section: Phases Comprising Spherical Supramolecular Objectsmentioning

confidence: 99%

“…A BCC (Im3m) [74] and, unusually, a simple cubic phase (Pm3m) [75] were identified (Figure 7.10c). When the GNPs were functionalized with a mixture of side-on rodlike nematogens and thioalkyl chains, in addition to columnar phases, three previously unobserved 3D ordered LC phases were obtained (Figure 7.10d): a rhombohedral (R3m) [76], a simple hexagonal (P6/mmm) [77], and indeed the close-packed FCC (Fm3m) structure [77].…”

Section: Phases Comprising Spherical Supramolecular Objectsmentioning

confidence: 99%

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Cubic and Other3DThermotropic Liquid Crystal Phases and Quasicrystals

Ungar

Liu

Zeng

2014

Handbook of Liquid Crystals

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Section: Nanoparticle-and Fullerene-containing 3d Phasessupporting

confidence: 51%

Section: Nanoparticle-and Fullerene-containing 3d Phasesmentioning

confidence: 75%

Section: Phases Comprising Spherical Supramolecular Objectsmentioning

confidence: 99%

Section: Phases Comprising Spherical Supramolecular Objectsmentioning

confidence: 99%

See 2 more Smart Citations

Cubic and Other3DThermotropic Liquid Crystal Phases and Quasicrystals

Ungar

Liu

Zeng

2014

Handbook of Liquid Crystals

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“…A particularly striking case is that of spherical nanoparticles (NP), typically gold ones, decorated with mesogens attached radially or tangentially with a flexible thiol terminated spacer group to the gold surface [10][11][12][13][14][15], similar in various ways to first generation dendrimers, and forming various liquid crystalline phases.…”

Section: Mesogensmentioning

confidence: 99%

Phase Organization of Mesogen-Decorated Spherical Nanoparticles

Orlandi

Zannoni

2013

Molecular Crystals and Liquid Crystals

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Laterally Alkyl‐ and Aryl‐Substituted, Swallow‐Tailed, and Polycatenar Mesogens: Structural Features and Functionalities

Weißflog

2014

Handbook of Liquid Crystals

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Long‐chain groups additionally attached to calamitic mesogens change the shape of the molecules and, therefore, their attractive and repulsive interactions. While compounds bearing lateral alkyl groups mostly exhibit nematic phases, lateral substitution with aryl‐containing groups means a qualitative jump by special packing in layer structures. Polycatenar mesogens can be wedge or dumbbell shaped depending on the number and positions of hydrocarbon chains at one or both terminal positions. Phasmidic and double‐swallow‐tailed mesogens are not able to exhibit smectic A phases for steric reasons, which can be induced, however, in mixtures with small rodlike molecules. Lateral alkyl chains attached to bent‐core mesogens reduce the tendency to form polar switchable layer phases, whereas polycatenar bent molecules form columnar structures. Equipping the molecules under discussion with functional groups in any ω‐standing position allows the lateral or terminal connection of mesogens, for example, to dendrimers, polymers, or metallic surfaces such as gold. In general, increasing the number of aliphatic chains often decreases melting points, increases solubility, and, therefore, allows better processability of functional materials.

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Control of anisotropic self-assembly of gold nanoparticles coated with mesogens

Cited by 44 publications

References 34 publications

Cubic and Other3DThermotropic Liquid Crystal Phases and Quasicrystals

Cubic and Other3DThermotropic Liquid Crystal Phases and Quasicrystals

Phase Organization of Mesogen-Decorated Spherical Nanoparticles

Laterally Alkyl‐ and Aryl‐Substituted, Swallow‐Tailed, and Polycatenar Mesogens: Structural Features and Functionalities

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