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Journal articles on the topic 'Colloidal Chains'

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Author: Grafiati

Published: 6 September 2023

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1

Marschelke, Claudia, Olga Diring, and Alla Synytska. "Reconfigurable assembly of charged polymer-modified Janus and non-Janus particles: from half-raspberries to colloidal clusters and chains." Nanoscale Advances 1, no. 9 (2019): 3715–26. http://dx.doi.org/10.1039/c9na00522f.

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pH-triggered, reconfigurable assembly of binary mixtures of hybrid hairy Janus and non-Janus colloids to half-raspberry-like constructs, colloidal clusters and colloidal chains depending on particle size ratio and numerical ratio.

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2

Liu, Bin, Etienne Duguet, and Serge Ravaine. "Solvent-induced assembly of mono- and divalent silica nanoparticles." Beilstein Journal of Nanotechnology 14 (January 6, 2023): 52–60. http://dx.doi.org/10.3762/bjnano.14.6.

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Particles with attractive patches are appealing candidates to be used as building units to fabricate novel colloidal architectures by self-assembly. Here, we report the synthesis of one-patch silica nanoparticles, which consist of silica half-spheres whose concave face carries in its center a polymeric patch made of grafted polystyrene chains. The multistage synthesis allows for a fine control of the patch-to-particle size ratio from 0.23 to 0.57. The assembly of the patchy nanoparticles can be triggered by reducing the solvent quality for the polystyrene chains. Dimers or trimers can be obtained by tuning the patch-to-particle size ratio. When mixed with two-patch nanoparticles, one-patch nanoparticles control the length of the resulting chains by behaving as colloidal chain stoppers. The present strategy allows for future elaboration of novel colloidal structures by controlled assembly of nanoparticles.

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3

METAYER, C., E. COQUELLE, V. A. STERLIGOV, A. MEUNIER, G. BOSSIS, and J. PERSELLO. "IMPORTANCE OF CONTROLLING INTERPARTICLE GAPS FOR NOVEL MATERIAL PROPERTIES." International Journal of Modern Physics B 19, no. 07n09 (April 10, 2005): 1290–96. http://dx.doi.org/10.1142/s0217979205030207.

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Measurement of average interparticle gap in chains of colloidal particles is realized by means of light scattering in silica suspensions or dynamic mechanical analysis in MR elastomers. For a silica volume fraction of 10% we find that the mean distance between particles inside chains drop off sharply with the increase of field; this behavior is attributed to the presence of a long range ionic repulsive force. We show that this experiment allows to obtain information about interparticle forces between colloidal particles. On the other hand the transmitted light is very sensitive to the size of the particles in the chain and to the gap between particles. In an other domain, namely elastomers containing chains of magnetic particles, the magnetostriction is also found to be determined by the interparticle gap.

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4

HIMMI, MUSTAPHA, and LAILA MOHAMMADI. "EXTENSIVE STUDY OF INTERACTION FORCE BETWEEN SPHERICAL COLLOIDS AND STAR POLYMERS." International Journal of Modern Physics B 26, no. 17 (June 21, 2012): 1250105. http://dx.doi.org/10.1142/s0217979212501056.

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We consider a system consisting of very small colloidal particles clothed each by f end-grafted flexible polymer chains we regarded as star polymers, and hard spherical colloidal particles in a good solvent. Our main objective is to determine the expression of the interaction force between a spherical colloid and a star polymer as a function of distance between them. We limit ourselves to the case where the star polymer is smaller than the colloid. In the first part, the system is dissolved in a melt of short linear chains of polymerization degree P<N, where N denotes the polymerization degree of grafted chains. To compute the expected force, we consider two regimes: (1) high-grafting density [Formula: see text] and (2) small-grafting density (f < f*). For (f > f*), we show that the expression of the expected force coincides exactly with that of the case of a small molecular weight solvent. For (f < f*), we show that there is a change in behavior. In the second part, we assume that the lengths of the f grafted chains were randomly distributed and there is talk of a polydisperse star polymer. We show that the computation of the expected force depends on the relative values of the polymerization degree of longest grafted chain, N, when it is compared to the typical one Nc ~ f1/(α-1). Here α is the polydispersity exponent. We distinguish two regimes depending on whether N < Nc or N > Nc. For the regime with N < Nc, and comparing the expression of the force obtained for the monodisperse case, we can say that the polydispersity of grafted chains induce a drastic change of the force expression. For the regime with N > Nc, we found the existence of two distance-ranges. For small distances, the effective force expression is identical to that relative to the above case (N < Nc). But for high distances, the effective force expression is similar to the monodisperse case.

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5

Kim, Jeong-Hee, Won Jong Kwon, and Byeong-Hyeok Sohn. "Supracolloidal polymer chains of diblock copolymer micelles." Chemical Communications 51, no. 16 (2015): 3324–27. http://dx.doi.org/10.1039/c4cc09518a.

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6

Yang, Tao, Brennan Sprinkle, Yang Guo, Jun Qian, Daoben Hua, Aleksandar Donev, David W. M. Marr, and Ning Wu. "Reconfigurable microbots folded from simple colloidal chains." Proceedings of the National Academy of Sciences 117, no. 31 (July 17, 2020): 18186–93. http://dx.doi.org/10.1073/pnas.2007255117.

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To overcome the reversible nature of low-Reynolds-number flow, a variety of biomimetic microrobotic propulsion schemes and devices capable of rapid transport have been developed. However, these approaches have been typically optimized for a specific function or environment and do not have the flexibility that many real organisms exhibit to thrive in complex microenvironments. Here, inspired by adaptable microbes and using a combination of experiment and simulation, we demonstrate that one-dimensional colloidal chains can fold into geometrically complex morphologies, including helices, plectonemes, lassos, and coils, and translate via multiple mechanisms that can be varied with applied magnetic field. With chains of multiblock asymmetry, the propulsion mode can be switched from bulk to surface-enabled, mimicking the swimming of microorganisms such as flagella-rotating bacteria and tail-whipping sperm and the surface-enabled motion of arching and stretching inchworms and sidewinding snakes. We also demonstrate that reconfigurability enables navigation through three-dimensional and narrow channels simulating capillary blood vessels. Our results show that flexible microdevices based on simple chains can transform both shape and motility under varying magnetic fields, a capability we expect will be particularly beneficial in complex in vivo microenvironments.

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7

Yang, Tao, David W. M. Marr, and Ning Wu. "Superparamagnetic colloidal chains prepared via Michael-addition." Colloids and Surfaces A: Physicochemical and Engineering Aspects 540 (March 2018): 23–28. http://dx.doi.org/10.1016/j.colsurfa.2017.12.044.

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8

Zhang, H., and M. Widom. "Field-induced forces in colloidal particle chains." Physical Review E 51, no. 3 (March 1, 1995): 2099–103. http://dx.doi.org/10.1103/physreve.51.2099.

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9

GRÜNZEL, MAREIKE. "SIMULATION OF COLLOIDAL CHAIN MOVEMENTS UNDER A MAGNETIC FIELD." International Journal of Modern Physics C 16, no. 07 (July 2005): 1091–95. http://dx.doi.org/10.1142/s0129183105007753.

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Short colloidal chains are simulated by the slithering-snake-algorithm on a simple cubic lattice. The dipole character of the colloidal particles leads to a long range dipole–dipole interaction. The solvent is simulated by the nearest neighbor Ising model. The aligning of the dipoles under a magnetic field gives rise to the chains to align on their part with the field direction.

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10

Semenov, A. N., and A. A. Shvets. "Theory of colloid depletion stabilization by unattached and adsorbed polymers." Soft Matter 11, no. 45 (2015): 8863–78. http://dx.doi.org/10.1039/c5sm01365h.

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11

Sasaki, Yuji, Yoshinori Takikawa, V. S. R. Jampani, Hikaru Hoshikawa, Takafumi Seto, Christian Bahr, Stephan Herminghaus, Yoshiki Hidaka, and Hiroshi Orihara. "Colloidal caterpillars for cargo transportation." Soft Matter 10, no. 44 (2014): 8813–20. http://dx.doi.org/10.1039/c4sm01354a.

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12

Jiang, Bowen, Dengyuan Hao, Chaonan Li, Shaojin Lu, Qing Pei, and Zhigang Xie. "Fluorinated paclitaxel prodrugs for potentiated stability and chemotherapy." Journal of Materials Chemistry B 9, no. 48 (2021): 9971–79. http://dx.doi.org/10.1039/d1tb02165f.

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The assembly behavior and colloidal stability of fluorinated paclitaxel prodrugs are tailored by optimizing the length of fluoroalkyl chains. The PS-17F possesses the most excellent self-assembly behavior, colloidal stability and antitumor efficacy.

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13

Terada, Yayoi, and Michio Tokuyama. "Lateral Diffusion of Magnetic Colloidal Chains Confined in Thin Films and Monolayer Colloids." Journal of the Physical Society of Japan 79, no. 3 (March 15, 2010): 034802. http://dx.doi.org/10.1143/jpsj.79.034802.

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14

Verweij, Ruben W., Pepijn G. Moerman, Loes P. P. Huijnen, Nathalie E. G. Ligthart, Indrani Chakraborty, Jan Groenewold, Willem K. Kegel, Alfons van Blaaderen, and Daniela J. Kraft. "Conformations and diffusion of flexibly linked colloidal chains." Journal of Physics: Materials 4, no. 3 (May 4, 2021): 035002. http://dx.doi.org/10.1088/2515-7639/abf571.

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15

Li, Dichuan, Sam Banon, and Sibani L. Biswal. "Bending dynamics of DNA-linked colloidal particle chains." Soft Matter 6, no. 17 (2010): 4197. http://dx.doi.org/10.1039/c0sm00159g.

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16

Gomilšek, M., D. Seč, M. Škarabot, M. Ravnik, S. Žumer, and I. Muševič. "Light-driven oscillations of entangled nematic colloidal chains." European Physical Journal E 33, no. 4 (November 7, 2010): 291–96. http://dx.doi.org/10.1140/epje/i2010-10671-6.

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17

Ianiro, Alessandro, José Augusto Berrocal, Remco Tuinier, Michael Mayer, and Christoph Weder. "Computational design of anisotropic nanocomposite actuators." Journal of Chemical Physics 158, no. 1 (January 7, 2023): 014901. http://dx.doi.org/10.1063/5.0129105.

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This paper presents a theoretical investigation of the design of a new actuator type made of anisotropic colloidal particles grafted with stimuli-responsive polymer chains. These artificial muscles combine the osmotic actuation principle of stimuli-responsive hydrogels with the structural alignment of colloidal liquid crystals to achieve directional motion. The solubility of the stimuli-responsive polymer in the neutral state, its degree of polymerization, the salt concentration, and the grafting density of the polymer chains on the surface of the colloidal particles are investigated and identified as important for actuator performance and tunability. The computational results suggest that the proposed mechanically active material matches or exceeds the performances of natural muscles and provide the guidelines for the realization of artificial muscles with predetermined actuation properties.

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18

Wang, Meina, Adriana M. Mihut, Ellen Rieloff, Aleksandra P. Dabkowska, Linda K. Månsson, Jasper N. Immink, Emma Sparr, and Jérôme J. Crassous. "Assembling responsive microgels at responsive lipid membranes." Proceedings of the National Academy of Sciences 116, no. 12 (March 1, 2019): 5442–50. http://dx.doi.org/10.1073/pnas.1807790116.

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Directed colloidal self-assembly at fluid interfaces can have a large impact in the fields of nanotechnology, materials, and biomedical sciences. The ability to control interfacial self-assembly relies on the fine interplay between bulk and surface interactions. Here, we investigate the interfacial assembly of thermoresponsive microgels and lipogels at the surface of giant unilamellar vesicles (GUVs) consisting of phospholipids bilayers with different compositions. By altering the properties of the lipid membrane and the microgel particles, it is possible to control the adsorption/desorption processes as well as the organization and dynamics of the colloids at the vesicle surface. No translocation of the microgels and lipogels through the membrane was observed for any of the membrane compositions and temperatures investigated. The lipid membranes with fluid chains provide highly dynamic interfaces that can host and mediate long-range ordering into 2D hexagonal crystals. This is in clear contrast to the conditions when the membranes are composed of lipids with solid chains, where there is no crystalline arrangement, and most of the particles desorb from the membrane. Likewise, we show that in segregated membranes, the soft microgel colloids form closely packed 2D crystals on the fluid bilayer domains, while hardly any particles adhere to the more solid bilayer domains. These findings thus present an approach for selective and controlled colloidal assembly at lipid membranes, opening routes toward the development of tunable soft materials.

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19

Egorov, Sergei A. "Depletion Interactions between Nanoparticles: The Effect of the Polymeric Depletant Stiffness." Polymers 14, no. 24 (December 9, 2022): 5398. http://dx.doi.org/10.3390/polym14245398.

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A Density Functional Theory is employed to study depletion interactions between nanoparticles mediated by semiflexible polymers. The four key parameters are the chain contour length and the persistence length of the polymeric depletant, its radius of gyration, and the nanoparticle radius. In the Density Functional Theory calculation of the depletion interaction between the nanoparticles mediated by semiflexible polymers, the polymer gyration radius is kept constant by varying the contour length and the persistence length simultaneously. This makes it possible to study the effect of the chain stiffness on the depletion potential of mean force between the nanoparticles for a given depletant size. It is found that the depletion attraction becomes stronger for stiffer polymer chains and larger colloids. The depletion potential of mean force is used as input to compute the phase diagram for an effective one-component colloidal system.

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20

Spatafora-Salazar, Aldo, Lucas H. P. Cunha, and Sibani Lisa Biswal. "Periodic deformation of semiflexible colloidal chains in eccentric time-varying magnetic fields." Journal of Physics: Condensed Matter 34, no. 18 (March 1, 2022): 184005. http://dx.doi.org/10.1088/1361-648x/ac533a.

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Abstract Elastic filaments driven out of equilibrium display complex phenomena that involve periodic changes in their shape. Here, the periodic deformation dynamics of semiflexible colloidal chains in an eccentric magnetic field are presented. This field changes both its magnitude and direction with time, leading to novel nonequilibrium chain structures. Deformation into S-, Z-, and 4-mode shapes arises via the propagation and growth of bending waves. Transitions between these morphologies are governed by an interplay among magnetic, viscous, and elastic forces. Furthermore, the periodic behavior leading to these structures is described by four distinct stages of motion that include rotation, arrest, bending, and stretching of the chain. These stages correspond to specific intervals of the eccentric field’s period. A scaling analysis that considers the relative ratio of viscous to magnetic torques via a critical frequency illustrates how to maximize the bending energy. These results provide new insights into controlling colloidal assemblies by applying complex magnetic fields.

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21

Zhou, Jiajia, and Friederike Schmid. "Computer simulations of single particles in external electric fields." Soft Matter 11, no. 34 (2015): 6728–39. http://dx.doi.org/10.1039/c5sm01485a.

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22

Karner, Carina, Christoph Dellago, and Emanuela Bianchi. "Hierarchical self-assembly of patchy colloidal platelets." Soft Matter 16, no. 11 (2020): 2774–85. http://dx.doi.org/10.1039/d0sm00044b.

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23

Jirásek, Vít, Štěpán Stehlík, Pavla Štenclová, Anna Artemenko, Bohuslav Rezek, and Alexander Kromka. "Hydroxylation and self-assembly of colloidal hydrogenated nanodiamonds by aqueous oxygen radicals from atmospheric pressure plasma jet." RSC Advances 8, no. 66 (2018): 37681–92. http://dx.doi.org/10.1039/c8ra07873d.

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24

Wallis, Christopher, Marine Bonhomme, Jean-François Fabre, and Zéphirin Mouloungui. "Effect of aliphatic chain length on the chemical structures of low molecular weight hyperbranched polyesters." e-Polymers 18, no. 3 (May 24, 2018): 229–35. http://dx.doi.org/10.1515/epoly-2016-0309.

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AbstractLow molecular weight hyperbranched (HB) polyesters were synthesized via melt polymerization from trimethylolpropane and three aliphatic dicarboxylic acids, namely, succinic acid (SA), adipic acid (AA) and dodecanedioic acid (DA). The degrees of branching (DBs) ranged between 30% and 75% depending on the monomer ratio. Their DB, cyclic index and terminal index were all determined, indicating that the shorter chain HB polyesters PE-SA and PE-AA showed a greater degree of intramolecular cyclization, compared to the longer aliphatic chains within PE-DA. The HB polyesters form stable colloidal suspensions in buffered aqueous media and were found to be pH responsive. The stability of the colloidal suspensions is enhanced by two factors: (1) increasing the aliphatic chain length and (2) increasing the pH of the solution for the same HB polyester.

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25

Paul, Shounik, S. S. Sreejith, and Soumyajit Roy. "pH-induced phase transition and crystallization of soft-oxometalates (SOMs) into polyoxometalates (POMs): a study on crystallization from colloids." Acta Crystallographica Section C Structural Chemistry 74, no. 11 (October 16, 2018): 1274–83. http://dx.doi.org/10.1107/s2053229618007143.

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In this work, we demonstrate a simple approach for growing 1D (one-dimensional) inorganic chains of K(C6H16N)3Mo8O26·H2O polyoxometalates (POMs) from its colloidal soft-oxometalate (SOM) phase through the variation of pH. The structure is composed mainly of a 1D inorganic chain with a β-Mo8O26 4− binding node linked using K+ via Mo—O—K linkages, which results in a cuboctahedral geometry for the K+ ions. Crystal structure and Hirshfeld surface studies reveal the role of triethylammonium cations in restricting the growth of the 1D chain into 2D/3D (two-/three-dimensional) structures. During the nucleation process from the heterogeneous SOM phase, some of the intermolecular interactions in the dispersion phase are retained in the crystal structure, which was evidenced from residual O...O interactions. The crystallization of the species from its colloidal form as a function of pH was studied by the use of Raman spectroscopy and it was found that the increase in volume fraction of the β-Mo8O26 4− species in the crystallizing colloidal mixture with the decrease in pH is responsible for the nucleation. This was monitored by time-dependent DLS (dynamic light scattering) measurement and zeta-potential studies, revealing the co-existence of both the crystal and the colloidal forms at pH 3–2. This brings us to the conclusion that in the crystallization of POMs, the colloidal SOM phase precedes the crystalline POM phase which occurs via a phase transition. This work could open up avenues for the study of POM formation from the stand-point of colloidal chemistry and SOMs.

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26

Maloney, Ryan C., Guo-Jun Liao, Sabine H. L. Klapp, and Carol K. Hall. "Clustering and phase separation in mixtures of dipolar and active particles." Soft Matter 16, no. 15 (2020): 3779–91. http://dx.doi.org/10.1039/c9sm02311a.

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27

Li, Fan, and Andreas Stein. "Conjugation of Colloidal Clusters and Chains by Capillary Condensation." Journal of the American Chemical Society 131, no. 29 (July 29, 2009): 9920–21. http://dx.doi.org/10.1021/ja904591a.

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28

Gonzalez, S., and R. Soto. "Active colloidal chains with cilia- and flagella-like motion." New Journal of Physics 20, no. 5 (May 4, 2018): 053014. http://dx.doi.org/10.1088/1367-2630/aabe3c.

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29

Straube, Arthur V., Roel P. A. Dullens, Lutz Schimansky-Geier, and Ard A. Louis. "Zigzag transitions and nonequilibrium pattern formation in colloidal chains." Journal of Chemical Physics 139, no. 13 (October 7, 2013): 134908. http://dx.doi.org/10.1063/1.4823501.

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30

Kumaraswamy, Guruswamy, Bipul Biswas, and Chandan Kumar Choudhury. "Colloidal assembly by ice templating." Faraday Discussions 186 (2016): 61–76. http://dx.doi.org/10.1039/c5fd00125k.

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We investigate ice templating of aqueous dispersions of polymer coated colloids and crosslinkers, at particle concentrations far below that required to form percolated monoliths. Freezing the aqueous dispersions forces the particles into close proximity to form clusters, that are held together as the polymer chains coating the particles are crosslinked. We observe that, with an increase in the particle concentration from about 10⁶ to 10⁸ particles per ml, there is a transition from isolated single particles to increasingly larger clusters. In this concentration range, most of the colloidal clusters formed are linear or sheet like particle aggregates. Remarkably, the cluster size distribution for clusters smaller than about 30 particles, as well as the size distribution of linear clusters, is only weakly dependent on the dispersion concentration in the range that we investigate. We demonstrate that the main features of cluster formation are captured by kinetic simulations that do not consider hydrodynamics or instabilities at the growing ice front due to particle concentration gradients. Thus, clustering of colloidal particles by ice templating dilute dispersions appears to be governed only by particle exclusion by the growing ice crystals that leads to their accumulation at ice crystal boundaries.

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31

Es Sayed, Julien, Cédric Lorthioir, Patrick Perrin, and Nicolas Sanson. "PEGylated NiPAM microgels: synthesis, characterization and colloidal stability." Soft Matter 15, no. 5 (2019): 963–72. http://dx.doi.org/10.1039/c8sm02156b.

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The incorporation of hydrophilic PEG chains into the synthesis of thermoresponsive NiPAM microgels allows size-controlled and monodisperse microgels with both a constant VPTT and a high colloidal stability to be obtained.

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32

Sun, Qin, Liang Yang, Lei Su, Weikang Liu, Yifan Wang, Shaoming Yu, Changlong Jiang, and Zhongping Zhang. "Colloidal quantum dot chains: self-assembly mechanism and ratiometric fluorescent sensing." RSC Advances 7, no. 85 (2017): 53977–83. http://dx.doi.org/10.1039/c7ra10259c.

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33

Novio, F., and D. Ruiz-Molina. "Hydrophobic coordination polymer nanoparticles and application for oil–water separation." RSC Adv. 4, no. 29 (2014): 15293–96. http://dx.doi.org/10.1039/c4ra00850b.

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Catechol chemistry is used to fabricate coordination polymer nanoparticles bearing long alkyl chains with enhanced thermal and colloidal stabilities and applications for hydrophobic surfaces and oil–water separation.

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34

UKAI, TOMOFUMI, TORU MAEKAWA, and HISAO MORIMOTO. "EQUILIBRIUM PATTERNS OF CHAIN CLUSTERS COMPOSED OF FERROMAGNETIC PARTICLES IN AN EXTERNAL MAGNETIC FIELD." International Journal of Modern Physics B 16, no. 17n18 (July 20, 2002): 2352–56. http://dx.doi.org/10.1142/s0217979202012359.

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We carry out Monte Carlo simulations of a ferromagnetic colloidal system, which is subjected to an external magnetic field, to investigate the structures formed by chain clusters. The control parameters are the ratio of the dipole moment energy to thermal energy, λ, and the ratio of the interactive energy between the dipole and the external magnetic field to thermal energy, ξ. We investigate the effect of the system height on the pattern formations for λ=18 and ξ=30, ∞. Note that the system becomes paramagnetic when ξ=∞. We find that as the system height increases, chains coagulate to form fat clusters and spatially ordered structures are created when ξ=30, whereas chains form thin meandering walls when ξ=∞.

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35

Malhotra, Isha, and Sujin B. Babu. "Aggregation kinetics of irreversible patches coupled with reversible isotropic interaction leading to chains, bundles and globules." Pure and Applied Chemistry 90, no. 6 (June 27, 2018): 1085–98. http://dx.doi.org/10.1515/pac-2017-0910.

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Abstract In the present study we are performing simulation of simple model of two patch colloidal particles undergoing irreversible diffusion limited cluster aggregation using patchy Brownian cluster dynamics. In addition to the irreversible aggregation of patches, the spheres are coupled with isotropic reversible aggregation through the Kern–Frenkel potential. Due to the presence of anisotropic and isotropic potential we have also defined three different kinds of clusters formed due to anisotropic potential and isotropic potential only as well as both the potentials together. We have investigated the effect of patch size on self-assembly under different solvent qualities for various volume fractions. We will show that at low volume fractions during aggregation process, we end up in a chain conformation for smaller patch size while in a globular conformation for bigger patch size. We also observed a chain to bundle transformation depending on the attractive interaction strength between the chains or in other words depending on the quality of the solvent. We will also show that bundling process is very similar to nucleation and growth phenomena observed in colloidal system with short range attraction. We have also studied the bond angle distribution for this system, where for small patches only two angles are more probable indicating chain formation, while for bundling at very low volume fraction a tail is developed in the distribution. While for the case of higher patch angle this distribution is broad compared to the case of low patch angles showing we have a more globular conformation. We are also proposing a model for the formation of bundles which are similar to amyloid fibers using two patch colloidal particles.

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36

Di Foggia, Michele, Vitaliano Tugnoli, Stefano Ottani, Monica Dettin, Annj Zamuner, Santiago Sanchez-Cortes, Daniele Cesini, and Armida Torreggiani. "SERS Investigation on Oligopeptides Used as Biomimetic Coatings for Medical Devices." Biomolecules 11, no. 7 (June 29, 2021): 959. http://dx.doi.org/10.3390/biom11070959.

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The surface-enhanced Raman scattering (SERS) spectra of three amphiphilic oligopeptides derived from EAK16 (AEAEAKAK)2 were examined to study systematic amino acid substitution effects on the corresponding interaction with Ag colloidal nanoparticles. Such self-assembling molecular systems, known as “molecular Lego”, are of particular interest for their uses in tissue engineering and as biomimetic coatings for medical devices because they can form insoluble macroscopic membranes under physiological conditions. Spectra were collected for both native and gamma-irradiated samples. Quantum mechanical data on two of the examined oligopeptides were also obtained to clarify the assignment of the prominent significative bands observed in the spectra. In general, the peptide–nanoparticles interaction occurs through the COO− groups, with the amide bond and the aliphatic chain close to the colloid surface. After gamma irradiation, mimicking a free oxidative radical attack, the SERS spectra of the biomaterials show that COO− groups still provide the main peptide–nanoparticle interactions. However, the spatial arrangement of the peptides is different, exhibiting a systematic decrease in the distance between aliphatic chains and colloid nanoparticles.

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37

Miguel, M. Carmen, and R. Pastor-Satorras. "Kinetic growth of field-oriented chains in dipolar colloidal solutions." Physical Review E 59, no. 1 (January 1, 1999): 826–34. http://dx.doi.org/10.1103/physreve.59.826.

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38

Li, Dichuan, Jasmine Rogers, and Sibani L. Biswal. "Probing the Stability of Magnetically Assembled DNA-Linked Colloidal Chains." Langmuir 25, no. 16 (August 18, 2009): 8944–50. http://dx.doi.org/10.1021/la900370g.

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39

Clark, A. J., and M. G. Guenza. "Mapping of polymer melts onto liquids of soft-colloidal chains." Journal of Chemical Physics 132, no. 4 (January 28, 2010): 044902. http://dx.doi.org/10.1063/1.3292013.

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40

Tierno, Pietro, Francesc Sagués, Tom H. Johansen, and Igor M. Sokolov. "Evidence of Rouse-like dynamics in magnetically ratchetting colloidal chains." Soft Matter 7, no. 18 (2011): 7944. http://dx.doi.org/10.1039/c1sm05601h.

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41

Putaux, Jean-Luc, Christine Lancelon-Pin, Luc Choisnard, Annabelle Gèze, and Denis Wouessidjewe. "Topological defects in polycrystalline hexosomes from β-cyclodextrin fatty esters." Soft Matter 18, no. 10 (2022): 2028–38. http://dx.doi.org/10.1039/d1sm01831k.

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Dislocations and tilt grain boundaries in colloidal polycrystalline hexosomes of amphiphilic β-cyclodextrins acylated on their secondary face with C14 chains were described using the concepts of coincidence site lattice and structural units.

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42

XIA, SI-HUA, JUN WANG, ZHANG-XIAN LU, and FEIYAN ZHANG. "BIREFRINGENCE AND MAGNETO-OPTICAL PROPERTIES IN OLEIC ACID COATED Fe3O4 NANOPARTICLES: APPLICATION FOR OPTICAL SWITCH." International Journal of Nanoscience 10, no. 03 (June 2011): 515–20. http://dx.doi.org/10.1142/s0219581x11008289.

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We report magneto-optical properties in a kerosene colloidal suspension of oleic acid coated Fe3O4 nanoparticles (~14 nm). The magnetic colloids (fluids) show birefringence under a magnetic field. Systematical studies of the on–off switch times upon application of the on–off magnetic field with varied experimental parameters indicate that the switch response time depends strongly on the strength of the magnetic field and the concentration of the magnetic nanoparticles in the fluid. The data can be explained in terms of the formation of magnetic nanoparticle chains under a magnetic field. The important magneto-optical properties of the magnetic fluids allow us to design a tunable optical switch.

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43

Chen, Xiaoquan, Wenhao Shen, Shunli Kou, and Huanbin Liu. "GC-MS study of the removal of dissolved and colloidal substances in recycled papermaking by flocculation with nano-size TiO2 colloids." BioResources 6, no. 3 (July 12, 2011): 3300–3312. http://dx.doi.org/10.15376/biores.6.3.3300-3312.

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In the papermaking process, the removal and control of dissolved and colloidal substances (DCS) is a key issue for reducing the usage of fresh water. Nano-size TiO2 is an excellent capturing and flocculating agent for DCS due to its large surface area and positive charge. The composition of dissolved and colloidal substances in a system and the removal of these substances by flocculation with nano-size TiO2 colloids were determined by gas chromatography and mass spectrometry (GC-MS). The samples were obtained from non-deinked pulp (non-DIP), deinked pulp (DIP), and whitewater. The research results indicated that the removal efficiencies of the DCS, which are associated with the molecular structures, were sequenced from large to small as follows: resin acids and sterols, benzene derivatives containing carboxyl, fatty acids, and the phthalic acid esters. Then, the mechanism of flocculation removal of DCS was considered. With hydrogen bonding between the surface hydroxyl (Ti4+-OH) and the functional groups containing oxygen, the nano-size TiO2 particles can capture dissolved substances (DS), and bridge colloidal substances (CS) and complexes to induce agglomerate flocculation. The flocculating removal efficiencies were influenced by the functional groups and alkyls of the DCS. Greater numbers and polarities of functional groups produced higher removal efficiencies. Long alkyl chains shield functional groups, thereby inhibiting the formation of hydrogen bonding, which results in a decrease in removal efficiencies.

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44

Tanahashi, Mitsuru, and Kazuma Hirota. "A silica/epoxy resin nanocomposite exhibiting high thermal stability and low thermal expansion based on the uniform dispersion of hydrophilic colloidal silica nanospheres." Polymers and Polymer Composites 31 (April 26, 2023): 096739112311714. http://dx.doi.org/10.1177/09673911231171479.

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The present study fabricated high-performance silica/epoxy resin nanocomposites having a low coefficient of linear thermal expansion (CTE) and a high glass transition temperature ( Tg). This was accomplished by dispersing colloidal silica nanospheres having hydrophilic surfaces in epoxy resins, which limited the motion of the polymer chains. Nanocomposites were produced wherein isolated primary particles of colloidal silica without silane surface modification were dispersed uniformly. These particles were generated via the breakdown of loosely bound agglomerates of spherical silica particles during the agitation of a dispersion in an epoxy resin solution. Hydrogen bonding between hydroxyl groups on the hydrophilic surfaces of the dispersed silica nanoparticles and the cross-linked epoxy polymer network evidently limited thermally-induced motion of the polymer chains, resulting in a considerable reduction in the CTE and an increase in the Tg for the nanocomposite.

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45

Nowicki, P., T. Tokarski, B. Hutera, and B. Stypuła. "The Use of Colloidal Solutions of Zinc Oxide Nanoparticles in Investment Casting Technology/ Wykorzystanie Koloidalnych Roztworów Nanoczastek Tlenku Cynku W Technologii Wytapianych Modeli." Archives of Metallurgy and Materials 59, no. 4 (December 1, 2014): 1355–59. http://dx.doi.org/10.2478/amm-2014-0231.

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Abstract Studies presented here are relevant to the investment casting technology. The wettability of wax by the colloidal solutions of ZnO nanoparticles was tested in the following environments: esters, heptyl acetate (OH), butyl acetate (OB) and in alcohols: methanol (M), ethanol (E) and propanol (P). All colloidal solutions of ZnO showed very high effectiveness in wetting of the unmodified wax surface. Next, onto the surface modified with colloidal solutions of ZnO, a liquid ceramic slurry was applied (CMC). The wettability of the modified wax surface by the ceramic slurry is strongly dependent on the structure of organic solvents (the number of the functional groups of -OH, -COOH and the length of carbon chains). As regards the modifier (ZnO), the best wax wettability by CMC was achieved applying previously onto the surface of the wax a colloidal solution of ZnO nanoparticles in butyl acetate (OB). The contact angle amounted to about 38 deg. Studies using scanning electron microscopy (SEM) and X-ray microanalysis (XRD) allowed an assessment of the effect of colloidal solutions of ZnO nanoparticles on the wax - CMC interface morphology.

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46

Fortini, Andrea, Marjolein Dijkstra, and Remco Tuinier. "Phase behaviour of charged colloidal sphere dispersions with added polymer chains." Journal of Physics: Condensed Matter 17, no. 50 (December 2, 2005): 7783–803. http://dx.doi.org/10.1088/0953-8984/17/50/002.

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47

Weiss, Dirk N., Xavier Brokmann, Laurie E. Calvet, Marc A. Kastner, and Moungi G. Bawendi. "Multi-island single-electron devices from self-assembled colloidal nanocrystal chains." Applied Physics Letters 88, no. 14 (April 3, 2006): 143507. http://dx.doi.org/10.1063/1.2189012.

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RUIZ-GARCIA, JAIME, and BORIS I. IVLEV. "Formation of colloidal clusters and chains at the air/water interface." Molecular Physics 95, no. 2 (October 10, 1998): 371–75. http://dx.doi.org/10.1080/00268979809483169.

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IVLEV, JAIME RUIZ-GARCIA BORIS I. "Formation of colloidal clusters and chains at the air/water interface." Molecular Physics 95, no. 2 (October 1, 1998): 371–75. http://dx.doi.org/10.1080/002689798167296.

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50

McCoy, John D., and John G. Curro. "The colloidal force of bead-spring chains in a good solvent." Journal of Chemical Physics 122, no. 16 (April 22, 2005): 164905. http://dx.doi.org/10.1063/1.1884113.

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