Multidimensional structures made by gold nanoparticles with shape-adaptive grafting layers

Wójcik, Michał; Kołpaczyńska, Milena; Pociecha, Damian; Mieczkowski, Józef; Górecka, Ewa

doi:10.1039/c0sm00539h

Cited by 54 publications

(51 citation statements)

References 22 publications

(4 reference statements)

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“…Force Let me now consider possible conformations that can be observed in such model macromolecule depending on a number of attached chains AE . Following experimental work [8,[10][11][12][13][14][15][16][17], one would expect the possibility for the rod-like, disc-like and spherulitic shapes. It is obvious that one of the crucial factors that will define the most favourable shape(s) at given AE is the capability of the available molecular elements of space-filling into a required form.…”

Section: -3mentioning

confidence: 99%

“…The author acknowledges participation in one of the workshops from the "Mathematics of Liquid Crystals" series by INIMS (Cambridge, UK), [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] March 2013 and benefited from exchange visits in the frames of EU Grant No. PIRSES 268498.…”

Section: Acknowledgementsmentioning

confidence: 99%

“…Good example is provided by the existence of many common features in self-assembly of LC dendrimers and LC gold metamaterials [8,[10][11][12], and I will concentrate on these particular cases in this study. Both systems exhibit a similar set of lamellar, columnar and various cubic phases [8,[10][11][12][13][14][15][16][17]. Strictly speaking, the interior of these types of macromolecules is rather different: flexible hyperbranched polymer scaffold vs solid nanoparticle, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Relation between the grafting density of liquid crystal macromolecule and the symmetry of self-assembled bulk phase: coarse-grained molecular dynamics study

Ilnytskyi¹

2013

Condens. Matter Phys.

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I consider a generic coarse-grained model suitable for the study of bulk self-assembly of liquid crystal (LC) macromolecules. The cases include LC dendrimers, gold nanoparticles modified by polymer chains with terminating LC groups and others. The study is focused on the relation between a number of grafted chains, AE , and the symmetry of the self-assembled bulk phases. Simple space-filling arguments are used first to estimate stability intervals for a rod-like, disc-like and spherulitic conformations in terms of AE . These are followed by coarse-grained molecular dynamics simulations for both spontaneous and aided self-assembly of LC macromolecules into bulk phases. In spontaneous self-assembly runs, essential coexistence of rod-like and disc-like conformations is observed (via analysis of the histograms for the molecular asphericity) in a broad interval of AE , which prevents the formation of defect-free structures. The use of uniaxial and planar aiding fields is found to improve self-assembly into monodomain phases by promoting conformations of respective symmetry. Strong shape-phase relation, observed experimentally, is also indicated by the simulations by the coincidence of the stability intervals for the respective conformations with those for the bulk phases.

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Section: -3mentioning

confidence: 99%

Section: Acknowledgementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relation between the grafting density of liquid crystal macromolecule and the symmetry of self-assembled bulk phase: coarse-grained molecular dynamics study

Ilnytskyi¹

2013

Condens. Matter Phys.

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“…GNPs covered with various calamitic molecules having a terminal thiol group connected linearly or laterally to the molecule, such as cyanobiphenyl thiol, cyclohexylphenoxy thiol and many derivatives of biphenyl thiol, have been reported to exhibit nematic, smectic and columnar phases. [29][30][31][32][33][34][35][36] Similarly, thiol-terminated bent-core ligands have also been used to prepare mesogen-passivated GNPs. 37 A number of physical studies have been performed on these LC-GNP composites.…”

Section: Gnps With Mesogensmentioning

confidence: 99%

Discotic liquid crystal-nanoparticle hybrid systems

Kumar

2014

NPG Asia Mater

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Discotic liquid crystals (DLCs) are nanomaterials with sizes ranging from 2 to 6 nm, and they are emerging as one-dimensional organic semiconducting materials. Recently, hybridization of these materials with various metallic and semiconducting nanoparticles (NPs) to alter and improve their properties has been realized. This article provides an overview of the developments in the field of newly immersed discotic nanoscience, a sub-field of liquid crystal (LC) nanoscience. As this field is also of great interest to readers without an LCs background, a brief introduction of the LC field is given first, with special emphasis on DLCs. This is followed by various DLC-NP hybrid systems. Finally, an outlook into the future of this newly emerging, fascinating and exciting field of discotic nanoscience research is provided.

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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%